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Cheap flights from St. Louis (STL) to Ottawa (YOW) from $498

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/4. 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 — YOW
Jun 11 — Jun 181
From?
To?
Tue 6/11
Tue 6/18
1 adult, Economy
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Cheap flight deals from St. Louis to Ottawa

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Ottawa (YOW). 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

November

Cheapest in

January

Average price

$693

Round-trip from

$283
High demand for flights, 34% potential price rise
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Best time to find cheap flights, 46% potential price drop
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Average for round-trip flights in June 2024
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From Lambert-St Louis to Ottawa
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What is the cheapest day to fly round-trip from St. Louis to Ottawa?

Sunday is generally a great day to depart. Flying on this day could help you save up to 97%.

What is the cheapest month to fly from St. Louis to Ottawa?

Due to multiple factors, expect to potentially pay more when booking in November. For low rates, January can be a great choice for travel to Ottawa. Flights to Ottawa from St. Louis in January are about $539 on average during January, but can be found for as low as $278.

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

It’s typically best to fly out from St. Louis to Ottawa in the morning. Doing so could potentially save you 2% on the flight price compared to flying at noon, which is usually more expensive.

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

Find cheap flight options from St. Louis to Ottawa specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,050,429 searches. Prices were last updated on June 6, 2024.
Listed are some of the best fares we've found on flights departing from St. Louis to Ottawa in 2024. For more flight deals, be sure to check back very soon.
Thu 7/412:15 pmSTL - YOW
3 stops21h 59mMultiple Airlines
Thu 7/117:40 amYOW - STL
2 stops13h 19mMultiple Airlines
Deal found 6/4$498
Thu 7/46:22 pmSTL - YOW
2 stops22h 02mMultiple Airlines
Thu 7/117:40 amYOW - STL
2 stops13h 19mMultiple Airlines
Deal found 6/4$509
Thu 7/412:15 pmSTL - YOW
3 stops21h 59mMultiple Airlines
Thu 7/115:10 pmYOW - STL
3 stops24h 19mMultiple Airlines
Deal found 6/4$560
Thu 7/48:05 amSTL - YOW
2 stops14h 54mMultiple Airlines
Thu 7/1112:00 pmYOW - STL
1 stop4h 21mMultiple Airlines
Deal found 6/4$738
Wed 7/1010:19 amSTL - YOW
1 stop5h 45mAir Canada
Mon 7/1510:00 amYOW - STL
1 stop6h 21mAir Canada
Deal found 6/5$739
Wed 7/1010:19 amSTL - YOW
2 stops12h 40mUnited Airlines
Mon 7/156:03 pmYOW - STL
1 stop5h 34mUnited Airlines
Deal found 6/6$752
Fri 7/265:44 pmSTL - YOW
1 stop27h 32mMultiple Airlines
Sun 7/287:10 amYOW - STL
1 stop13h 51mMultiple Airlines
Deal found 6/4$759
Thu 7/48:05 amSTL - YOW
1 stop12h 47mAir Canada
Thu 7/112:00 pmYOW - STL
1 stop7h 01mAir Canada
Deal found 6/4$760
Fri 7/2611:25 amSTL - YOW
2 stops11h 34mUnited Airlines
Sun 7/286:05 amYOW - STL
1 stop5h 18mUnited Airlines
Deal found 6/4$806

St. Louis to Ottawa 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Ottawa in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,050,429 searches. Data last updated June 6, 2024.
Listed are some of the best fares we've found on flights departing from St. Louis to Ottawa in 2024. For more flight deals, be sure to check back very soon.
Thu 7/412:15 pmSTL - YOW
3 stops21h 59mMultiple Airlines
Thu 7/117:40 amYOW - STL
2 stops13h 19mMultiple Airlines
Deal found 6/4$498
Thu 7/46:22 pmSTL - YOW
2 stops22h 02mMultiple Airlines
Thu 7/117:40 amYOW - STL
2 stops13h 19mMultiple Airlines
Deal found 6/4$509
Thu 7/412:15 pmSTL - YOW
3 stops21h 59mMultiple Airlines
Thu 7/115:10 pmYOW - STL
3 stops24h 19mMultiple Airlines
Deal found 6/4$560
Thu 7/48:05 amSTL - YOW
2 stops14h 54mMultiple Airlines
Thu 7/1112:00 pmYOW - STL
1 stop4h 21mMultiple Airlines
Deal found 6/4$738
Wed 7/1010:19 amSTL - YOW
1 stop5h 45mAir Canada
Mon 7/1510:00 amYOW - STL
1 stop6h 21mAir Canada
Deal found 6/5$739
Wed 7/1010:19 amSTL - YOW
2 stops12h 40mUnited Airlines
Mon 7/156:03 pmYOW - STL
1 stop5h 34mUnited Airlines
Deal found 6/6$752
Fri 7/265:44 pmSTL - YOW
1 stop27h 32mMultiple Airlines
Sun 7/287:10 amYOW - STL
1 stop13h 51mMultiple Airlines
Deal found 6/4$759
Thu 7/48:05 amSTL - YOW
1 stop12h 47mAir Canada
Thu 7/112:00 pmYOW - STL
1 stop7h 01mAir Canada
Deal found 6/4$760
Fri 7/2611:25 amSTL - YOW
2 stops11h 34mUnited Airlines
Sun 7/286:05 amYOW - STL
1 stop5h 18mUnited Airlines
Deal found 6/4$806

Find flights from St. Louis to Ottawa within your budget

Customize your flight search to find flights from St. Louis to Ottawa 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 3,050,429 searches. Data last updated June 6, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$498 - $806

Route

Depart

Return

Price

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Thu 7/4

3 stops21h 59m

Ottawa

Thu 7/11

2 stops13h 19m

$498

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Thu 7/4

2 stops22h 02m

Ottawa

Thu 7/11

2 stops13h 19m

$509

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Thu 7/4

2 stops22h 02m

Ottawa

Thu 7/11

2 stops13h 19m

$541

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Thu 7/4

3 stops21h 59m

Ottawa

Thu 7/11

3 stops24h 19m

$560

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Thu 7/4

3 stops21h 59m

Ottawa

Thu 7/11

3 stops42h 15m

$570

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Wed 7/10

1 stop5h 45m

Ottawa

Mon 7/15

1 stop6h 21m

$739

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Wed 7/10

2 stops12h 40m

Ottawa

Mon 7/15

1 stop5h 34m

$752

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Thu 7/4

1 stop12h 47m

Ottawa

Thu 7/11

1 stop7h 01m

$760

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Fri 7/26

2 stops11h 34m

Ottawa

Sun 7/28

1 stop5h 18m

$806

Flights are sorted by cheapest first

Deals found on 6/4

What is the cheapest day to fly from St. Louis to Ottawa?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Ottawa. 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 Ottawa flight should consider departing on Thursday mornings when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
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Best time to book a flight from St. Louis to Ottawa

Have a flexible travel schedule? Discover the best time to fly to Ottawa 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 Ottawa by month

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

YOW

Temperature

14 - 69.8 °F

If weather is an important factor for your trip to Ottawa, 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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 14.0 F).

Reviews of airlines servicing Ottawa

Get insights into the airlines that provide service to Ottawa. 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 Ottawa. Reviews last updated June 6, 2024.
Peruse reviews from past customers who have flown with Air Canada and United Airlines from St. Louis to Ottawa to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,696 reviews

Overall

7.4

Food

6.7

Crew

8.1

Entertainment

7.1

Boarding

7.7

Comfort

7.2

Reviews

1 / 10

United has consistently been good. Every now and then there is a crew member that should probably retire, but most of them are excellent.

United Airlines
7.4
Good
10,696 reviews
United Airlines
7.4
Good
10,696 reviews

Overall

7.4

Food

6.7

Crew

8.1

Entertainment

7.1

Boarding

7.7

Comfort

7.2

Reviews

1 / 10

United has consistently been good. Every now and then there is a crew member that should probably retire, but most of them are excellent.

Air Canada
7.0
Good
7,044 reviews
United Airlines
7.4
Good
10,696 reviews

Overall

7.4

Food

6.7

Crew

8.1

Entertainment

7.1

Boarding

7.7

Comfort

7.2

Reviews

1 / 10

United has consistently been good. Every now and then there is a crew member that should probably retire, but most of them are excellent.

Related info for your journey

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

  • Can I find flights from St. Louis to Ottawa for under $500 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Ottawa for under $500. The cheapest flight booked recently is on Multiple Airlines for just $498, but on average you can expect to pay $695.

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

    Currently priced at $739, Air Canada will fly you from St. Louis to Ottawa and back. In addition to Air Canada, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on United Airlines for as low as $752.

  • What does STL to YOW mean?

    Lambert-St Louis Airport is STL and Ottawa Airport is YOW. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.

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

    The amount of baggage you can bring on your St. Louis to Ottawa 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 Ottawa with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Ottawa 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 Ottawa that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Ottawa 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 Ottawa that allow pets onboard?

    Many airlines flying from St. Louis to Ottawa 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 Ottawa?

    Yes, you can often find last-minute deals on St. Louis to Ottawa 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 Ottawa flight deals updated?

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

  • What is the cheapest month to book a flight from St. Louis to Ottawa?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Ottawa (average of $283). Flying from St. Louis to Ottawa in June is currently the most expensive (average of $492). 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

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

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Top 2 airlines flying from St. Louis to Ottawa

Discover the top 2 airlines that operate flights from St. Louis to Ottawa. 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 3,050,429 searches. Data last updated June 6, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$293Average$800FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$300Average$614FlexibilityNo cancel feeOn-time67%
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Search flights from St. Louis to Ottawa by cabin class

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