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Cheap flights from St. Louis (STL) to Heathrow (LHR) from $417

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
STL — LHR
Jun 11 — Jun 181
From?
To?
Tue 6/11
Tue 6/18
1 adult, Economy
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The best prices from Lambert-St Louis to London Heathrow are usually found in February or January, booked 64 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from St. Louis to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 6, 2024.

Popular in

June

Cheapest in

February

Round-trip from

$643

One-way from

$493
High demand for flights, 38% potential price rise
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Best time to find cheap flights, 19% potential price drop
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From Lambert-St Louis to London Heathrow
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One-way flight from Lambert-St Louis to London Heathrow
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What is the cheapest day to fly round-trip from St. Louis to London Heathrow Airport?

Flights from St. Louis to London Heathrow Airport are found to be more expensive on Friday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London Heathrow Airport.

How far in advance should I book a flight from St. Louis to London Heathrow Airport?

Find a great deal and save up to 50% by booking at least 10 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from St. Louis to London Heathrow Airport within the next two weeks, with the cheapest ticket starting at $586.

What is the cheapest month to fly from St. Louis to London Heathrow Airport?

Flights from St. Louis to London Heathrow Airport lean towards being more expensive in June. Prices are generally better when you fly from St. Louis to London Heathrow Airport in February, with the cheapest ticket starting at $628.

What is the cheapest time of day to fly from STL to LHR?

One of the essential ways to save on airfare from St. Louis to London Heathrow Airport is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 16% on airfare.

Cheap St. Louis to Heathrow flights in June & July 2024

Find cheap flight options from St. Louis to Heathrow specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,009,960 searches. Prices were last updated on June 6, 2024.
Scroll through some of the best deals on flights from St. Louis to London in 2024. Check back soon for alternative fares.
Tue 6/1110:50 amSTL - LHR
1 stop13h 30mLufthansa
Tue 6/181:00 pmLHR - STL
1 stop14h 44mLufthansa
Deal found 6/5$761
Tue 6/1111:15 amSTL - LHR
1 stop14h 25mUnited Airlines
Tue 6/186:50 amLHR - STL
2 stops20h 54mUnited Airlines
Deal found 6/5$772
Mon 6/108:25 amSTL - LHR
1 stop16h 20mMultiple Airlines
Thu 6/209:30 amLHR - STL
1 stop17h 35mMultiple Airlines
Deal found 6/5$778
Tue 7/98:25 amSTL - LHR
1 stop16h 20mUnited Airlines
Thu 7/188:30 amLHR - STL
1 stop12h 51mUnited Airlines
Deal found 6/5$784
Tue 7/910:10 amSTL - LHR
2 stops14h 20mAir Canada
Thu 7/188:30 amLHR - STL
1 stop12h 51mAir Canada
Deal found 6/5$785
Mon 6/104:55 pmSTL - LHR
1 stop12h 40mUnited Airlines
Thu 6/206:30 amLHR - STL
2 stops15h 11mUnited Airlines
Deal found 6/5$793
Sat 6/84:45 pmSTL - LHR
1 stop34h 55mUnited Airlines
Wed 6/198:30 amLHR - STL
1 stop11h 44mUnited Airlines
Deal found 6/5$794
Sun 7/285:30 pmSTL - LHR
1 stop33h 00mUnited Airlines
Thu 8/84:40 pmLHR - STL
2 stops27h 38mUnited Airlines
Deal found 6/5$803
Sat 7/64:05 pmSTL - LHR
1 stop32h 30mAir Canada
Tue 7/168:30 amLHR - STL
2 stops18h 35mAir Canada
Deal found 6/5$816

St. Louis to Heathrow 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Heathrow in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,009,960 searches. Data last updated June 6, 2024.
Scroll through some of the best deals on flights from St. Louis to London in 2024. Check back soon for alternative fares.
Tue 9/241:31 pmSTL - LHR
1 stop15h 44mAmerican Airlines
Wed 10/28:50 amLHR - STL
2 stops14h 33mAmerican Airlines
Deal found 6/5$617
Wed 10/98:50 amSTL - LHR
1 stop20h 45mUnited Airlines
Wed 10/232:05 pmLHR - STL
2 stops26h 02mUnited Airlines
Deal found 6/5$626
Wed 10/98:50 amSTL - LHR
1 stop16h 50mUnited Airlines
Fri 10/184:00 pmLHR - STL
2 stops28h 48mUnited Airlines
Deal found 6/4$631
Tue 9/246:15 amSTL - LHR
1 stop23h 20mMultiple Airlines
Wed 10/23:50 pmLHR - STL
1 stop29h 30mMultiple Airlines
Deal found 6/5$632
Wed 9/256:15 amSTL - LHR
1 stop23h 20mUnited Airlines
Tue 10/83:50 pmLHR - STL
1 stop29h 30mUnited Airlines
Deal found 6/6$633
Wed 9/2510:10 amSTL - LHR
2 stops14h 20mAir Canada
Tue 10/82:05 pmLHR - STL
1 stop13h 00mAir Canada
Deal found 6/5$639
Wed 10/910:10 amSTL - LHR
2 stops14h 20mAir Canada
Wed 10/239:30 amLHR - STL
1 stop17h 35mAir Canada
Deal found 6/6$640
Wed 9/256:00 amSTL - LHR
1 stop18h 25mDelta
Tue 10/86:30 amLHR - STL
2 stops20h 01mDelta
Deal found 6/6$644
Wed 10/911:51 amSTL - LHR
2 stops14h 14mDelta
Wed 10/236:15 amLHR - STL
2 stops16h 36mDelta
Deal found 6/5$645

St. Louis to Heathrow flights leaving soon

Find last-minute flight options from St. Louis to Heathrow for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,009,960 searches. Data last updated June 6, 2024.
Have a look at some of the last-minute flights available departing from St. Louis to London. Users should double check the flight they book to ensure it matches the day, time, and destination they're looking for.
Tue 6/1110:50 amSTL - LHR
1 stop13h 30mLufthansa
Tue 6/181:00 pmLHR - STL
1 stop14h 44mLufthansa
Deal found 6/5$761
Tue 6/1111:38 amSTL - LHR
2 stops13h 37mUnited Airlines
Tue 6/186:50 amLHR - STL
2 stops20h 54mUnited Airlines
Deal found 6/5$772
Fri 6/146:00 amSTL - LHR
1 stop10h 10mBritish Airways
Mon 6/178:10 amLHR - STL
1 stop12h 16mBritish Airways
Deal found 6/5$993
Sat 6/155:25 pmSTL - LHR
1 stop10h 45mUnited Airlines
Sat 6/2210:35 amLHR - STL
1 stop15h 50mUnited Airlines
Deal found 6/5$997
Tue 6/119:50 amSTL - LHR
1 stop20h 00mAir Canada
Fri 6/218:30 amLHR - STL
1 stop17h 31mAir Canada
Deal found 6/5$1,025
Sat 6/158:55 amSTL - LHR
1 stop20h 40mUnited Airlines
Sat 6/228:00 amLHR - STL
2 stops17h 42mUnited Airlines
Deal found 6/5$1,065
Sat 6/1511:25 amSTL - LHR
2 stops16h 00mDelta
Sat 6/2212:10 pmLHR - STL
2 stops17h 33mDelta
Deal found 6/5$1,209
Fri 6/146:08 pmSTL - LHR
1 stop32h 52mBritish Airways
Sun 6/238:45 pmLHR - STL
2 stops32h 12mBritish Airways
Deal found 6/5$1,265
Sun 6/166:30 amSTL - LHR
3 stops34h 25mMultiple Airlines
Wed 6/196:00 amLHR - STL
2 stops20h 01mMultiple Airlines
Deal found 6/5$1,281

One-way flights to Heathrow from St. Louis

Search for one-way flight options from St. Louis to Heathrow. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,009,960 searches. Data last updated June 6, 2024.
Users in need of a one-way flight from St. Louis to London can choose from these deals. Users needing a return flight from St. Louis to London should utilize the search form above.
Sun 8/2512:15 pmSTL - LHR
3 stops17h 40mMultiple Airlines
Deal found 6/5$417
Fri 8/2312:15 pmSTL - LHR
3 stops26h 05mMultiple Airlines
Deal found 6/5$448
Tue 7/93:23 pmSTL - LHR
3 stops49h 12mMultiple Airlines
Deal found 6/5$454
Wed 8/148:10 amSTL - LHR
3 stops20h 10mMultiple Airlines
Deal found 6/5$458
Sat 8/2412:15 pmSTL - LHR
3 stops17h 40mMultiple Airlines
Deal found 6/5$473
Wed 8/1412:15 pmSTL - LHR
3 stops18h 30mMultiple Airlines
Deal found 6/5$474
Wed 8/1410:08 amSTL - LHR
1 stop14h 17mVirgin Atlantic
Deal found 6/5$493
Wed 7/109:09 amSTL - LHR
1 stop16h 36mIberia
Deal found 6/5$495
Tue 7/911:30 amSTL - LHR
1 stop13h 00mAir Canada
Deal found 6/5$504

Find flights from St. Louis to Heathrow within your budget

Customize your flight search to find flights from St. Louis to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 3,009,960 searches. Data last updated June 6, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$617 - $768

Route

Depart

Return

Price

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Tue 9/24

1 stop15h 44m

London Heathrow

Wed 10/2

2 stops14h 33m

$617

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Wed 10/9

1 stop20h 45m

London Heathrow

Wed 10/23

2 stops26h 02m

$626

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Tue 9/24

1 stop23h 20m

London Heathrow

Wed 10/2

1 stop29h 30m

$632

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Wed 9/25

2 stops14h 20m

London Heathrow

Tue 10/8

1 stop13h 00m

$639

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Wed 10/9

2 stops14h 14m

London Heathrow

Wed 10/23

2 stops16h 36m

$645

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Wed 9/18

1 stop15h 39m

London Heathrow

Mon 10/14

2 stops29h 36m

$670

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Wed 9/25

2 stops14h 50m

London Heathrow

Tue 10/1

2 stops15h 01m

$699

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Wed 8/14

1 stop12h 47m

London Heathrow

Tue 8/20

2 stops17h 32m

$700

Lambert-St LouisLondon Heathrow

STL - LHR

STLLHR

Lambert-St Louis

Thu 8/15

1 stop12h 28m

London Heathrow

Thu 8/22

1 stop12h 42m

$768

Flights are sorted by cheapest first

Deals found on 6/5

What is the cheapest day to fly from St. Louis to London Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Heathrow. Price data was last updated on June 2, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to London Heathrow Airport flight should consider departing on Wednesday evenings when fares are most often at their lowest. Thursday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from St. Louis to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Temperature and rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature and rainfall totals by month.

LON

Temperature

39.2 - 62.6 °F

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated June 6, 2024.
Get a feel of what it's like to fly with Air Canada, British Airways and United Airlines from St. Louis to London by reading reviews from past customers. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,371 reviews

Entertainment

8.0

Crew

8.6

Boarding

8.2

Comfort

7.9

Food

7.4

Overall

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Delta
8.0
Very good
10,371 reviews
Delta
8.0
Very good
10,371 reviews

Entertainment

8.0

Crew

8.6

Boarding

8.2

Comfort

7.9

Food

7.4

Overall

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

KLM
7.9
Good
1,493 reviews
Delta
8.0
Very good
10,371 reviews

Entertainment

8.0

Crew

8.6

Boarding

8.2

Comfort

7.9

Food

7.4

Overall

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Finnair
7.8
Good
1,363 reviews
Delta
8.0
Very good
10,371 reviews

Entertainment

8.0

Crew

8.6

Boarding

8.2

Comfort

7.9

Food

7.4

Overall

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Austrian Airlines
7.7
Good
1,008 reviews
Delta
8.0
Very good
10,371 reviews

Entertainment

8.0

Crew

8.6

Boarding

8.2

Comfort

7.9

Food

7.4

Overall

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Virgin Atlantic
7.6
Good
718 reviews
Delta
8.0
Very good
10,371 reviews

Entertainment

8.0

Crew

8.6

Boarding

8.2

Comfort

7.9

Food

7.4

Overall

8.0

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to London Heathrow?

    Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to London Heathrow from St. Louis. Booking flights from Lambert-St Louis (STL) to London Heathrow should be relatively easy as there are 0 daily outbound flights to London Heathrow from 11 different airlines.

  • Can I find flights from St. Louis to London Heathrow Airport for under $700 on Cheapflights?

    Yes, there are multiple flights from St. Louis to London Heathrow Airport for under $700. The cheapest flight booked recently is on American Airlines for just $617, but on average you can expect to pay $658.

  • Are there last-minute flights available from St. Louis to London Heathrow Airport for under $800?

    There are currently 19+ open flights from St. Louis to London Heathrow Airport within the next 7 days for less than $800.

  • What are the cheapest airlines flying from St. Louis to London Heathrow Airport round-trip?

    According to our current data, American Airlines ($617), United Airlines ($626), and Air Canada ($639) offers the cheapest pricing from St. Louis to London Heathrow Airport. American Airlines is 30% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from St. Louis to London Heathrow Airport one-way?

    For one-way options, check prices for Virgin Atlantic. According to our data, you can fly for as low as $493. Users have also found prices from $495 and $504 on Iberia and Air Canada, respectively.

  • What does STL to LHR mean?

    This is defined as Lambert-St Louis Airport (STL) and London Heathrow Airport (LHR). Codes like London Heathrow Airport are often used to just call airports uniquely.

  • Can I find deals for flights from St. Louis to Heathrow that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Heathrow flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from St. Louis to Heathrow with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Heathrow flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from St. Louis to Heathrow that include hotel bookings?

    Yes. In addition to deals on St. Louis to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Heathrow.

  • Can I find deals for business class flights from St. Louis to Heathrow?

    Yes. Cheapflights offers flight deals from St. Louis to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from St. Louis to Heathrow that allow pets onboard?

    Many airlines flying from St. Louis to Heathrow offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from St. Louis to Heathrow?

    Yes, you can often find last-minute deals on St. Louis to Heathrow flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the St. Louis to London Heathrow Airport flight deals updated?

    The St. Louis to London Heathrow Airport flight deals you see on this page were last updated on 6/6.

  • What are the most popular airlines that fly from St. Louis to London Heathrow Airport?

    The most popular airlines flying from St. Louis to London Heathrow Airport are American Airlines, Air Canada and Air France. Something to consider prior to booking your flight.

  • What is the cheapest month to book a flight from St. Louis to London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from St. Louis to London Heathrow Airport (average of $653). Flying from St. Louis to London Heathrow Airport in June is currently the most expensive (average of $1,102). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for St. Louis to Heathrow
See prices for flight routes from nearby airports that may be better suited for you.

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Top 10 airlines flying from St. Louis to Heathrow

Discover the top 10 airlines that operate flights from St. Louis to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 3,009,960 searches. Data last updated June 6, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$587Average$843FlexibilityNo cancel feeOn-time69%
IberiaCheapest$621Average$791FlexibilityNo cancel feeOn-time77%
FinnairCheapest$643Average$840FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$653Average$896FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$654Average$802FlexibilityNo cancel feeOn-time72%
DeltaCheapest$661Average$873FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$667Average$1,038FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$685Average$1,259FlexibilityNo cancel feeOn-time76%
KLMCheapest$688Average$821FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$703Average$1,062FlexibilityNo cancel feeOn-time67%
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Search flights from St. Louis to Heathrow by cabin class

Find flights from St. Louis to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from St. Louis to Heathrow?

Deals for St. Louis to Heathrow flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Heathrow?

Cheapflights helps you find that perfect flight to Heathrow from St. Louis by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from St. Louis to Heathrow with no change fees?

Yes, we can. To see specific flights from St. Louis to Heathrow with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from St. Louis to Heathrow become cheaper?

Not ready to book yet? You can track prices for flights from St. Louis to Heathrow on Cheapflights with our Price Alert feature and get notified when better prices are available.

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