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Cheap flights from Ottawa to St. Louis from C$ 555

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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — STL
19 Nov — 26 Nov1
1 adult

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 14 November 2024.

Round-trip from

C$ 775

One-way from

C$ 555

Popular in

January

Cheapest in

September
Air Canada
  • Air Canada
  • 24/12-31/12
  • 2 total stops
  • 15h 42m total
  • Ottawa to St. Louis
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1/12
  • 1/12
  • 3 total stops
  • 25h 05m total
  • Ottawa to St. Louis
Search Deals
High demand for flights, 23% potential price rise
Search Deals
Best time to find cheap flights, 14% potential price drop
Search Deals

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 14 November 2024.

Tue 24/1210:05 a.m.YOW - STL
1 stop6h 01mAir Canada
Tue 31/126:25 a.m.STL - YOW
1 stop9h 41mAir Canada
Deal found 13/11C$ 775
Tue 24/129:45 a.m.YOW - STL
2 stops11h 12mUnited Airlines
Tue 31/126:25 a.m.STL - YOW
1 stop9h 41mUnited Airlines
Deal found 13/11C$ 872

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 625,151 searches. Data last updated 14 November 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Tue 24/12

10:05 a.m.-3:06 p.m.

1 stop6h 01m

Lambert-St Louis

Tue 31/12

6:25 a.m.-5:06 p.m.

1 stop9h 41m

C$ 775

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Tue 24/12

9:45 a.m.-7:57 p.m.

2 stops11h 12m

Lambert-St Louis

Tue 31/12

8:00 a.m.-6:54 p.m.

2 stops9h 54m

C$ 872

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sun 1/12

4:20 p.m.-4:25 p.m.

3 stops25h 05m

C$ 555

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sun 1/12

5:55 a.m.-6:06 p.m.

2 stops37h 11m

C$ 704

Flights are sorted by cheapest first

Deals found on 14/11

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, January is the cheapest month in which you can book a flight from Ottawa to St. Louis (average of C$ 349). Flying from Ottawa to St. Louis in September is currently the most expensive (average of C$ 491). 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 56.0 - 119.0 mm per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Louis when rainfall is around 56.0 mm.

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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

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 14 November 2024.
United Airlines
7.4
Good
9,194 reviews
Check prices

Crew

8.1

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.7

Overall

7.4

Reviews

1 / 10

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

United Airlines
7.4
Good
9,194 reviews
United Airlines
7.4
Good
9,194 reviews
Check prices

Crew

8.1

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.7

Overall

7.4

Reviews

1 / 10

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

WestJet
7.3
Good
2,804 reviews
United Airlines
7.4
Good
9,194 reviews
Check prices

Crew

8.1

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.7

Overall

7.4

Reviews

1 / 10

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

Air Canada
7.0
Good
8,198 reviews
United Airlines
7.4
Good
9,194 reviews
Check prices

Crew

8.1

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Food

6.7

Overall

7.4

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.

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

    Air Canada, at C$ 775, was found to be the cheapest airline from Ottawa to St. Louis. An alternate airline flying to your destination would be United Airlines. Air Canada is currently priced 17% below the average price you’ll pay for this route.

  • 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.

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

    Currently, January is the cheapest month in which you can book a flight from Ottawa to St. Louis (average of C$ 349). Flying from Ottawa to St. Louis in September is currently the most expensive (average of C$ 491). 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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Top airline flying from Ottawa to St. Louis

Discover the top airline 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 625,151 searches. Data last updated 14 November 2024.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 672AverageC$ 891FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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

When you search for this flight from Ottawa to St. Louis, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights helps you find that perfect flight to St. Louis from Ottawa 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 Ottawa to St. Louis with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ottawa to St. Louis flexibly with Cheapflights today.

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

Yes! Start tracking prices for Ottawa to St. Louis flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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