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Cheap flights from Ottawa to St. Louis from C$ 531

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 8/4. 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.
YOW — STL
2 Apr — 9 Apr1
1 adult
Tue 2/4
Tue 9/4

Find deals on flights from Ottawa to St. Louis by searching across hundreds of travel sites at once

 
Cheapflights users frequently choose these airlines when searching for flights from Ottawa to St. Louis, based on our search results.
Cheapflights users frequently choose these airlines when searching for flights from Ottawa to St. Louis, based on our search results.
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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 28 March 2024.

Popular in

May

Cheapest in

March

Average price

C$ 677

Round-trip from

C$ 496
High demand for flights, 30% potential price rise
Best time to find cheap flights, 15% potential price drop
Average for round-trip flights in March 2024
From Ottawa to Lambert-St Louis

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

Departing on a Wednesday is a good option for securing a great price. You can expect to save up to 19% when planning your travel around this day of the week.

How far in advance should I book a flight from Ottawa to St. Louis?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 38 days in advance, which can save you up to 76% on flights from Ottawa to St. Louis compared to booking the week you need them. Waiting 38 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at C$ 702. For sooner than that we have options available in the next 3 days from C$ 1,107.

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

March is one of the best times of the year to fly to St. Louis from Ottawa. Prices for March average C$ 795 per person but you can even find prices for as low as C$ 569. The most expensive prices can be found in the month of May. Opting for a March flight can save you 41% on your journey compared to booking in May

When is the cheapest time to fly from Ottawa to St. Louis (YOW - STL)?

When flying from Ottawa to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap United Airlines flights from Ottawa to St. Louis

Explore cheap flight options specifically provided by United Airlines for the route between Ottawa and St. Louis. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 586,909 searches. Data last updated 28 March 2024.
Find some of the cheapest United Airlines flights travelling from Ottawa to St. Louis. Make sure to check back often as deals are often changing.
Wed 10/76:03 p.m.YOW - STL
1 stop5h 34mUnited Airlines
Wed 17/76:08 a.m.STL - YOW
1 stop5h 47mUnited Airlines
Deal found 27/3C$ 741
Wed 10/76:03 p.m.YOW - STL
1 stop5h 34mUnited Airlines
Wed 17/76:30 a.m.STL - YOW
2 stops16h 29mUnited Airlines
Deal found 27/3C$ 804
Mon 15/45:55 p.m.YOW - STL
1 stop5h 20mUnited Airlines
Tue 16/48:27 a.m.STL - YOW
1 stop14h 22mUnited Airlines
Deal found 27/3C$ 919
Wed 10/75:30 a.m.YOW - STL
2 stops18h 07mUnited Airlines
Wed 17/78:05 a.m.STL - YOW
2 stops13h 11mUnited Airlines
Deal found 27/3C$ 950
Sat 20/42:47 p.m.YOW - STL
2 stops8h 02mUnited Airlines
Thu 23/56:30 a.m.STL - YOW
1 stop9h 34mUnited Airlines
Deal found 28/3C$ 999
Thu 11/46:38 a.m.YOW - STL
1 stop4h 36mUnited Airlines
Sun 14/46:00 a.m.STL - YOW
2 stops16h 49mUnited Airlines
Deal found 26/3C$ 1,046
Sat 13/49:45 a.m.YOW - STL
2 stops11h 09mUnited Airlines
Sun 21/411:10 a.m.STL - YOW
1 stop9h 22mUnited Airlines
Deal found 26/3C$ 1,057
Thu 11/46:38 a.m.YOW - STL
1 stop4h 36mUnited Airlines
Sun 14/48:27 a.m.STL - YOW
1 stop14h 22mUnited Airlines
Deal found 26/3C$ 1,117

Cheap WestJet flights from Ottawa to St. Louis

Explore cheap flight options specifically provided by WestJet for the route between Ottawa and St. Louis. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 586,909 searches. Data last updated 28 March 2024.
To aid your search, here are some of the cheapest WestJet flights we've found from Ottawa to St. Louis. Deals frequently update to provide users with more options.
Mon 15/41:10 p.m.YOW - STL
2 stops9h 07mWestJet
Tue 16/412:59 p.m.STL - YOW
2 stops10h 20mWestJet
Deal found 26/3C$ 920
Sat 13/46:00 a.m.YOW - STL
2 stops13h 37mWestJet
Sun 21/46:13 a.m.STL - YOW
2 stops17h 06mWestJet
Deal found 26/3C$ 1,004
Thu 11/46:00 a.m.YOW - STL
2 stops12h 26mWestJet
Sun 14/46:13 a.m.STL - YOW
2 stops17h 06mWestJet
Deal found 26/3C$ 1,014
Sat 20/46:00 a.m.YOW - STL
2 stops13h 20mWestJet
Thu 23/512:53 p.m.STL - YOW
2 stops17h 06mWestJet
Deal found 27/3C$ 1,188
Sat 20/46:00 a.m.YOW - STL
2 stops13h 20mWestJet
Thu 23/512:53 p.m.STL - YOW
2 stops17h 06mWestJet
Deal found 28/3C$ 1,334

Cheap Ottawa to St. Louis flights in March & April 2024

Find cheap flight options from Ottawa to St. Louis specifically for the months of March and April 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 586,909 searches. Prices were last updated on 28 March 2024.
These are some of the most attractive deals on flights from Ottawa to St. Louis in 2024. Check back regularly for other flight deals.
Mon 8/45:30 p.m.YOW - STL
1 stop21h 10mMultiple Airlines
Thu 11/47:30 p.m.STL - YOW
2 stops23h 04mMultiple Airlines
Deal found 27/3C$ 531
Mon 8/45:30 p.m.YOW - STL
1 stop21h 10mMultiple Airlines
Thu 11/46:24 p.m.STL - YOW
1 stop24h 10mMultiple Airlines
Deal found 27/3C$ 597
Sat 13/45:30 p.m.YOW - STL
1 stop14h 43mMultiple Airlines
Sun 21/46:24 p.m.STL - YOW
1 stop24h 10mMultiple Airlines
Deal found 26/3C$ 636
Mon 8/47:55 a.m.YOW - STL
3 stops30h 45mMultiple Airlines
Thu 11/47:30 p.m.STL - YOW
2 stops23h 04mMultiple Airlines
Deal found 27/3C$ 758
Mon 8/44:45 p.m.YOW - STL
2 stops21h 55mMultiple Airlines
Thu 11/47:30 p.m.STL - YOW
2 stops23h 04mMultiple Airlines
Deal found 27/3C$ 773
Mon 8/47:55 a.m.YOW - STL
3 stops30h 45mMultiple Airlines
Thu 11/47:30 p.m.STL - YOW
3 stops23h 37mMultiple Airlines
Deal found 27/3C$ 798
Sat 20/41:30 p.m.YOW - STL
1 stop10h 24mMultiple Airlines
Thu 23/56:30 a.m.STL - YOW
1 stop9h 34mMultiple Airlines
Deal found 27/3C$ 886
Sat 20/41:30 p.m.YOW - STL
1 stop10h 24mMultiple Airlines
Thu 23/56:30 a.m.STL - YOW
1 stop9h 34mMultiple Airlines
Deal found 28/3C$ 898
Mon 15/45:55 p.m.YOW - STL
1 stop5h 20mUnited Airlines
Tue 16/48:27 a.m.STL - YOW
1 stop14h 22mUnited Airlines
Deal found 27/3C$ 919

Ottawa to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between Ottawa and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 586,909 searches. Data last updated 28 March 2024.
These are some of the most attractive deals on flights from Ottawa to St. Louis in 2024. Check back regularly for other flight deals.
Mon 8/45:30 p.m.YOW - STL
1 stop21h 10mMultiple Airlines
Thu 11/47:30 p.m.STL - YOW
2 stops23h 04mMultiple Airlines
Deal found 27/3C$ 531
Mon 8/45:30 p.m.YOW - STL
1 stop21h 10mMultiple Airlines
Thu 11/46:24 p.m.STL - YOW
1 stop24h 10mMultiple Airlines
Deal found 27/3C$ 597
Sat 13/45:30 p.m.YOW - STL
1 stop14h 43mMultiple Airlines
Sun 21/46:24 p.m.STL - YOW
1 stop24h 10mMultiple Airlines
Deal found 26/3C$ 636
Wed 10/76:03 p.m.YOW - STL
1 stop5h 34mUnited Airlines
Wed 17/76:08 a.m.STL - YOW
1 stop5h 47mUnited Airlines
Deal found 27/3C$ 741
Mon 8/47:55 a.m.YOW - STL
3 stops30h 45mMultiple Airlines
Thu 11/47:30 p.m.STL - YOW
2 stops23h 04mMultiple Airlines
Deal found 27/3C$ 758
Mon 8/44:45 p.m.YOW - STL
2 stops21h 55mMultiple Airlines
Thu 11/47:30 p.m.STL - YOW
2 stops23h 04mMultiple Airlines
Deal found 27/3C$ 773
Mon 8/47:55 a.m.YOW - STL
3 stops30h 45mMultiple Airlines
Thu 11/47:30 p.m.STL - YOW
3 stops23h 37mMultiple Airlines
Deal found 27/3C$ 798
Wed 10/76:03 p.m.YOW - STL
1 stop5h 34mUnited Airlines
Wed 17/76:30 a.m.STL - YOW
2 stops16h 29mUnited Airlines
Deal found 27/3C$ 804
Wed 10/75:30 a.m.YOW - STL
2 stops11h 10mMultiple Airlines
Wed 17/74:05 p.m.STL - YOW
1 stop6h 42mMultiple Airlines
Deal found 27/3C$ 845

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 586,909 searches. Data last updated 28 March 2024.

Fly from

Any airport

Fly to

Any airport

Budget

C$ 531 - C$ 1,806

Route

Depart

Return

Price

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Mon 8/4

1 stop21h 10m

Lambert-St Louis

Thu 11/4

2 stops23h 04m

C$ 531

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Mon 8/4

1 stop21h 10m

Lambert-St Louis

Thu 11/4

1 stop24h 10m

C$ 597

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Sat 13/4

1 stop14h 43m

Lambert-St Louis

Sun 21/4

1 stop24h 10m

C$ 636

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Wed 10/7

1 stop5h 34m

Lambert-St Louis

Wed 17/7

1 stop5h 47m

C$ 741

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Mon 8/4

3 stops30h 45m

Lambert-St Louis

Thu 11/4

2 stops23h 04m

C$ 758

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Wed 10/7

1 stop5h 34m

Lambert-St Louis

Wed 17/7

2 stops16h 29m

C$ 804

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Mon 15/4

2 stops9h 07m

Lambert-St Louis

Tue 16/4

2 stops10h 20m

C$ 920

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Mon 15/4

2 stops11h 16m

Lambert-St Louis

Tue 16/4

2 stops6h 45m

C$ 958

OttawaLambert-St Louis

YOW - STL

YOWSTL

Ottawa

Wed 10/7

2 stops34h 04m

Lambert-St Louis

Wed 17/7

2 stops23h 37m

C$ 1,806

Flights are sorted by cheapest first

Deals found on 27/3

When is the best time to book a flight from Ottawa to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to St. Louis. Price data was last updated on 28 January 2024.
The best time to book flights from Ottawa to St. Louis is 75 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Search Deals

When is the cheapest time to fly from Ottawa to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Ottawa to St. Louis. Price data was last updated on 24 March 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Ottawa to St. Louis flight should consider departing on Thursday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to St. Louis by month

Plan your trip from Ottawa to St. Louis by taking into account the cheapest months to travel. The average price of a one-way flight from Ottawa to St. Louis is currently C$ 0 while a round-trip flight costs C$ 861. Price data was last updated on 24 March 2024.

Currently, January is the cheapest month in which you can book a flight from Ottawa to St. Louis (average of C$ 365). Flying from Ottawa to St. Louis in July is currently the most expensive (average of C$ 522). 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.

January

C$ 496

February

C$ 545

March

C$ 607

April

C$ 643

May

C$ 542

June

C$ 635

July

C$ 709

August

C$ 620

September

C$ 625

October

C$ 650

November

C$ 548

December

C$ 516

Temperature and rainfall in St. Louis by month

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

STL

Temperature

0 - 27 °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 28 March 2024.
Read reviews from past customers who have flown United Airlines and WestJet from Ottawa to St. Louis. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very good
11,402 reviews

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.1

Entertainment

8.0

Food

7.5

Reviews

1 / 10

It was a good experience other than a short delay.

8.1
Very good
11,402 reviews
8.1
Very good
11,402 reviews

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.1

Entertainment

8.0

Food

7.5

Reviews

1 / 10

It was a good experience other than a short delay.

7.5
Good
3,036 reviews
8.1
Very good
11,402 reviews

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.1

Entertainment

8.0

Food

7.5

Reviews

1 / 10

It was a good experience other than a short delay.

7.4
Good
11,481 reviews
8.1
Very good
11,402 reviews

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.1

Entertainment

8.0

Food

7.5

Reviews

1 / 10

It was a good experience other than a short delay.

7.0
Good
6,743 reviews
8.1
Very good
11,402 reviews

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.1

Entertainment

8.0

Food

7.5

Reviews

1 / 10

It was a good experience other than a short delay.

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 C$ 600 on Cheapflights?

    Yes, there are multiple flights from Ottawa to St. Louis for under C$ 600. The cheapest flight booked recently is on Multiple Airlines for just C$ 531, but on average you can expect to pay C$ 856.

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

    United Airlines, at C$ 741, was found to be the cheapest airline from Ottawa to St. Louis.Alternate airlines to your destination round-trip include WestJet and Air Canada. United Airlines is currently priced 6% below the average price you’ll pay for this route.

  • 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 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 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 see available direct flights.

  • 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 do 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.

  • 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 27/3.

See more FAQs

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

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 586,909 searches. Data last updated 28 March 2024.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 626AverageC$ 726FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Search flights from Ottawa to St. Louis by cabin class

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

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 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.

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 can I compare prices from different travel booking sites for flights from Ottawa to St. Louis?

Cheapflights aggregates prices from various travel booking sites. This allows you to compare prices and choose the best deal.

Can I find deals for flights from Ottawa to St. Louis that offer flexible cancellation policies?

Cancellation policies vary by airline and fare type. After entering your flight details, you can view the cancellation policies for each deal in the search results. Some deals may offer flexibility in terms of cancellation and changes.