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$505+ Cheap flights from Ottawa (YOW) to St. Louis (STL)

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 11/8. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — STL
Nov 3 — Nov 101
Sun 11/3
Sun 11/10
1 adult, Economy
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YOW - STL
Nov 3 - Nov 10

Find cheap flights from Ottawa to St. Louis with Cheapflights

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Cheap flight deals from Ottawa to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to St. Louis (STL). 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 October 29, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

January

Cheapest in

December

Average price

$631

Round-trip from

$505
(Kiwi.com)
Provider with most accurate pricing for Ottawa-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Ottawa-Lambert-St Louis flights.
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High demand for flights, 23% potential price rise
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Best time to find cheap flights, 17% potential price drop
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Average for round-trip flights in October 2024
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From Ottawa to Lambert-St Louis
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Find flight deals from Ottawa to St. Louis

Cheapest flights from Ottawa to St. Louis
Explore the most affordable flight options available from Ottawa to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 29, 2024.

This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/85:55 amYOW - STL
2 stops35h 39mMultiple Airlines
Sun 11/105:29 pmSTL - YOW
1 stop23h 24mMultiple Airlines
Deal found 10/27$505
This United Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/126:00 amYOW - STL
2 stops10h 34mUnited Airlines
Thu 12/1910:35 amSTL - YOW
1 stop9h 49mUnited Airlines
Deal found 10/28$625
This FlightHub deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/95:55 amYOW - STL
2 stops31h 13mWestJet
Mon 12/1610:28 amSTL - YOW
2 stops12h 42mWestJet
Deal found 10/29$630
This Air Canada deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/710:05 amYOW - STL
1 stop6h 01mAir Canada
Sat 11/93:50 pmSTL - YOW
1 stop4h 47mAir Canada
Deal found 10/27$865

Find flights from Ottawa to St. Louis within your budget

Customize your flight search to find flights from Ottawa to St. Louis 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 2,539,541 searches. Data last updated October 29, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$505 - $900

Route

Depart

Return

Price

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Fri 11/8

2 stops35h 39m

Lambert-St Louis

Sun 11/10

1 stop23h 24m

$505

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Thu 12/12

2 stops10h 34m

Lambert-St Louis

Thu 12/19

1 stop9h 49m

$625

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Mon 12/9

2 stops31h 13m

Lambert-St Louis

Mon 12/16

2 stops12h 42m

$630

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Sat 11/9

1 stop6h 01m

Lambert-St Louis

Mon 11/11

1 stop8h 47m

$900

Flights are sorted by cheapest first

Deals found on 10/27

Compare providers for flights from Ottawa to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ottawa to St. Louis in October.
ProviderPrice AccuracyTrust Score*Cancellation Policy
eDreamsPrice Accuracy3 starsTrust Score*3 starsCancellation PolicyAirline Policy
FlightHubPrice Accuracy3 starsTrust Score*3 starsCancellation PolicyAirline Policy
MytripPrice Accuracy3 starsTrust Score*3 starsCancellation PolicyAirline Policy

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ottawa-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ottawa-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ottawa-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ottawa-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ottawa-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Ottawa 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.

Travel insights for flights from Ottawa to St. Louis

Get recent, data-driven insights about flights from Ottawa to St. Louis including ideal travel times, pricing trends, and more.

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

Currently, September is the cheapest month in which you can book a flight from Ottawa to St. Louis (average of $308). Flying from Ottawa to St. Louis in March is currently the most expensive (average of $356). 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.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated October 29, 2024.
Peruse reviews from past customers who have flown with United Airlines and Air Canada from Ottawa to St. Louis 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
9,249 reviews

Boarding

7.7

Comfort

7.3

Food

6.7

Crew

8.1

Overall

7.4

Entertainment

7.1

Reviews

1 / 10

Terribly delayed flight, missed ongoing flight, hotel very downmarket Food voucher not accepted in hotel

United Airlines
7.4
Good
9,249 reviews
United Airlines
7.4
Good
9,249 reviews

Boarding

7.7

Comfort

7.3

Food

6.7

Crew

8.1

Overall

7.4

Entertainment

7.1

Reviews

1 / 10

Terribly delayed flight, missed ongoing flight, hotel very downmarket Food voucher not accepted in hotel

WestJet
7.3
Good
2,801 reviews
United Airlines
7.4
Good
9,249 reviews

Boarding

7.7

Comfort

7.3

Food

6.7

Crew

8.1

Overall

7.4

Entertainment

7.1

Reviews

1 / 10

Terribly delayed flight, missed ongoing flight, hotel very downmarket Food voucher not accepted in hotel

Air Canada
7.0
Good
8,071 reviews
United Airlines
7.4
Good
9,249 reviews

Boarding

7.7

Comfort

7.3

Food

6.7

Crew

8.1

Overall

7.4

Entertainment

7.1

Reviews

1 / 10

Terribly delayed flight, missed ongoing flight, hotel very downmarket Food voucher not accepted in hotel

Related info for your journey

Find useful and relevant information for your journey from Ottawa to St. Louis. 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 Ottawa to St. Louis for under $600 on Cheapflights?

    Yes, there are multiple flights from Ottawa to St. Louis for under $600. The cheapest flight booked recently is on Multiple Airlines for just $505, but on average you can expect to pay $665.

  • Are there last-minute flights available from Ottawa to St. Louis for under $600?

    There are currently 3+ open flights from Ottawa to St. Louis within the next 7 days for less than $600.

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

    Our cheapest airline available from Ottawa to St. Louis is United Airlines. Our recent data shows that you can find tickets from as low as $625 on this airline. Additional options worth looking into are WestJet and Air Canada, starting at $630 and $900 round-trip. You may be able to fly from Ottawa to St. Louis for 5% less than the average price by searching for these airlines.

  • What does YOW to STL mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Ottawa Airport to Lambert-St Louis Airport flight would often be abbreviated as a YOW to STL flight.

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

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

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

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

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

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

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

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

    Many airlines flying from Ottawa to St. Louis 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 Ottawa to St. Louis?

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

    The Ottawa to St. Louis flight deals you see on this page were last updated on 10/29.

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

    Currently, September is the cheapest month in which you can book a flight from Ottawa to St. Louis (average of $308). Flying from Ottawa to St. Louis in March is currently the most expensive (average of $356). 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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Top 2 airlines flying from Ottawa to St. Louis

Discover the top 2 airlines that operate flights from Ottawa to St. Louis. 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 2,539,541 searches. Data last updated October 29, 2024.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$550Average$656FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$575Average$730FlexibilityNo cancel feeOn-time69%
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