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Cheap flights from St. Louis (STL) to Ottawa (YOW) from $166

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 7/1. 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
May 19 — May 261
From?
To?
Sun 5/19
Sun 5/26
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 May 14, 2024.

Popular in

November

Cheapest in

January

Round-trip from

$283

One-way from

$166
High demand for flights, 36% potential price rise
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Best time to find cheap flights, 44% potential price drop
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From Lambert-St Louis to Ottawa
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One-way flight from Lambert-St Louis to Ottawa
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What is the cheapest day to fly round-trip from St. Louis to Ottawa?

Saturday is generally a great day to depart. Flying on this day could help you save up to 27%.

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 $520 on average during January, but can be found for as low as $278.

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

When flying from St. Louis to Ottawa, 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 St. Louis to Ottawa

Explore cheap flight options specifically provided by United Airlines for the route between St. Louis and Ottawa. 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 2,632,958 searches. Data last updated May 14, 2024.
Find some of the cheapest United Airlines flights traveling from St. Louis to Ottawa. Deals update often to give you more flight options matching your criteria
Sat 9/148:25 amSTL - YOW
1 stop14h 32mUnited Airlines
Wed 9/186:30 amYOW - STL
1 stop4h 37mUnited Airlines
Deal found 5/12$599
Thu 8/2911:10 amSTL - YOW
2 stops11h 47mUnited Airlines
Sun 9/16:30 amYOW - STL
1 stop6h 52mUnited Airlines
Deal found 5/14$608
Thu 8/2911:10 amSTL - YOW
2 stops11h 47mUnited Airlines
Sun 9/17:30 pmYOW - STL
2 stops15h 37mUnited Airlines
Deal found 5/14$613
Wed 6/126:08 amSTL - YOW
1 stop5h 37mUnited Airlines
Thu 6/206:05 amYOW - STL
2 stops10h 36mUnited Airlines
Deal found 5/13$691
Fri 6/148:05 amSTL - YOW
2 stops12h 59mUnited Airlines
Fri 6/211:35 pmYOW - STL
2 stops9h 12mUnited Airlines
Deal found 5/14$2,200

Cheap WestJet flights from St. Louis to Ottawa

Explore cheap flight options specifically provided by WestJet for the route between St. Louis and Ottawa. 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 2,632,958 searches. Data last updated May 14, 2024.
Some of the best deals we've found on WestJet flights traveling from St. Louis to Ottawa. Check back soon if you're not seeing flights that suit your needs.
Wed 6/125:56 pmSTL - YOW
2 stops19h 42mWestJet
Thu 6/203:25 pmYOW - STL
2 stops26h 36mWestJet
Deal found 5/12$695
Wed 6/126:00 amSTL - YOW
2 stops13h 48mWestJet
Sat 6/223:25 pmYOW - STL
2 stops31h 30mWestJet
Deal found 5/12$751
Sat 9/143:30 pmSTL - YOW
2 stops22h 09mWestJet
Wed 9/189:35 pmYOW - STL
2 stops19h 21mWestJet
Deal found 5/12$984

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

Find cheap flight options from St. Louis to Ottawa specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,632,958 searches. Prices were last updated on May 14, 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.
Wed 6/128:16 amSTL - YOW
1 stop8h 11mMultiple Airlines
Thu 6/207:20 amYOW - STL
2 stops13h 02mMultiple Airlines
Deal found 5/14$485
Wed 6/121:55 pmSTL - YOW
2 stops16h 02mMultiple Airlines
Thu 6/207:20 amYOW - STL
2 stops13h 02mMultiple Airlines
Deal found 5/14$510
Wed 6/121:55 pmSTL - YOW
2 stops16h 02mMultiple Airlines
Thu 6/207:20 amYOW - STL
2 stops13h 02mMultiple Airlines
Deal found 5/14$511
Wed 6/121:55 pmSTL - YOW
2 stops16h 02mMultiple Airlines
Thu 6/207:20 amYOW - STL
3 stops31h 56mMultiple Airlines
Deal found 5/13$520
Wed 6/121:55 pmSTL - YOW
2 stops16h 02mMultiple Airlines
Thu 6/207:20 amYOW - STL
2 stops13h 02mMultiple Airlines
Deal found 5/13$530
Wed 6/128:16 amSTL - YOW
1 stop8h 11mMultiple Airlines
Thu 6/207:20 amYOW - STL
2 stops13h 02mMultiple Airlines
Deal found 5/13$531
Wed 6/121:55 pmSTL - YOW
2 stops16h 02mMultiple Airlines
Thu 6/207:20 amYOW - STL
3 stops31h 56mMultiple Airlines
Deal found 5/14$533
Wed 6/128:16 amSTL - YOW
1 stop8h 11mMultiple Airlines
Thu 6/207:20 amYOW - STL
2 stops13h 02mMultiple Airlines
Deal found 5/14$534
Wed 6/128:16 amSTL - YOW
1 stop8h 11mMultiple Airlines
Sat 6/223:00 pmYOW - STL
2 stops27h 25mMultiple Airlines
Deal found 5/12$550

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 2,632,958 searches. Data last updated May 14, 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.
Wed 6/128:16 amSTL - YOW
1 stop8h 11mMultiple Airlines
Thu 6/207:20 amYOW - STL
2 stops13h 02mMultiple Airlines
Deal found 5/14$485
Wed 6/121:55 pmSTL - YOW
2 stops16h 02mMultiple Airlines
Thu 6/207:20 amYOW - STL
2 stops13h 02mMultiple Airlines
Deal found 5/14$510
Wed 6/121:55 pmSTL - YOW
2 stops16h 02mMultiple Airlines
Thu 6/207:20 amYOW - STL
2 stops13h 02mMultiple Airlines
Deal found 5/14$511
Wed 6/121:55 pmSTL - YOW
2 stops16h 02mMultiple Airlines
Thu 6/207:20 amYOW - STL
3 stops31h 56mMultiple Airlines
Deal found 5/13$520
Fri 9/64:31 pmSTL - YOW
2 stops20h 21mMultiple Airlines
Mon 9/98:05 amYOW - STL
3 stops26h 34mMultiple Airlines
Deal found 5/13$528
Wed 6/121:55 pmSTL - YOW
2 stops16h 02mMultiple Airlines
Thu 6/207:20 amYOW - STL
2 stops13h 02mMultiple Airlines
Deal found 5/13$530
Wed 6/128:16 amSTL - YOW
1 stop8h 11mMultiple Airlines
Thu 6/207:20 amYOW - STL
2 stops13h 02mMultiple Airlines
Deal found 5/13$531
Wed 6/121:55 pmSTL - YOW
2 stops16h 02mMultiple Airlines
Thu 6/207:20 amYOW - STL
3 stops31h 56mMultiple Airlines
Deal found 5/14$533
Wed 6/128:16 amSTL - YOW
1 stop8h 11mMultiple Airlines
Thu 6/207:20 amYOW - STL
2 stops13h 02mMultiple Airlines
Deal found 5/14$534

One-way flights to Ottawa from St. Louis

Search for one-way flight options from St. Louis to Ottawa. 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 2,632,958 searches. Data last updated May 14, 2024.
Users traveling one-way from St. Louis to Ottawa can select one of these great deals. Users in need of a round-trip flight from St. Louis to Ottawa instead should update the search form at the top of page.
Mon 7/17:29 pmSTL - YOW
1 stop20h 58mMultiple Airlines
Deal found 5/13$166
Mon 7/18:05 amSTL - YOW
2 stops14h 54mUnited Airlines
Deal found 5/13$283
Mon 7/12:41 pmSTL - YOW
3 stops46h 50mMultiple Airlines
Deal found 5/13$318
Mon 7/15:30 pmSTL - YOW
3 stops19h 44mUnited Airlines
Deal found 5/13$431

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 2,632,958 searches. Data last updated May 14, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$485 - $695

Route

Depart

Return

Price

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Wed 6/12

1 stop8h 11m

Ottawa

Thu 6/20

2 stops13h 02m

$485

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Wed 6/12

2 stops16h 02m

Ottawa

Thu 6/20

2 stops13h 02m

$510

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Wed 6/12

2 stops16h 02m

Ottawa

Thu 6/20

2 stops13h 02m

$511

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Wed 6/12

2 stops16h 02m

Ottawa

Thu 6/20

3 stops31h 56m

$520

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Sat 9/14

1 stop14h 32m

Ottawa

Wed 9/18

1 stop4h 37m

$599

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Thu 8/29

2 stops11h 47m

Ottawa

Sun 9/1

1 stop6h 52m

$608

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Thu 8/29

2 stops11h 47m

Ottawa

Sun 9/1

2 stops15h 37m

$613

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Sat 9/14

1 stop9h 39m

Ottawa

Wed 9/18

2 stops8h 39m

$627

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Wed 6/12

2 stops19h 42m

Ottawa

Thu 6/20

2 stops26h 36m

$695

Flights are sorted by cheapest first

Deals found on 5/14

When is the cheapest time 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 May 12, 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. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
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Average price of flights to Ottawa by month

Plan your trip from St. Louis to Ottawa by taking into account the cheapest months to travel. The average price of a one-way flight from St. Louis to Ottawa is currently $300 while a round-trip flight costs $574. Price data was last updated on May 12, 2024.

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 July is currently the most expensive (average of $481). 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

$283

February

$350

March

$345

April

$312

May

$331

June

$411

July

$481

August

$446

September

$456

October

$361

November

$312

December

$339

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

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 May 14, 2024.
Peruse reviews from past customers who have flown with United Airlines and WestJet 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.
WestJet
7.5
Good
2,925 reviews
Check prices

Food

6.5

Entertainment

6.5

Comfort

7.3

Boarding

7.7

Overall

7.5

Crew

8.2

Reviews

1 / 10

We had a great experience with the flight back to Toronto and crew were awesome.

WestJet
7.5
Good
2,925 reviews
WestJet
7.5
Good
2,925 reviews
Check prices

Food

6.5

Entertainment

6.5

Comfort

7.3

Boarding

7.7

Overall

7.5

Crew

8.2

Reviews

1 / 10

We had a great experience with the flight back to Toronto and crew were awesome.

United Airlines
7.4
Good
10,959 reviews
WestJet
7.5
Good
2,925 reviews
Check prices

Food

6.5

Entertainment

6.5

Comfort

7.3

Boarding

7.7

Overall

7.5

Crew

8.2

Reviews

1 / 10

We had a great experience with the flight back to Toronto and crew were awesome.

Air Canada
7.0
Good
6,936 reviews
WestJet
7.5
Good
2,925 reviews
Check prices

Food

6.5

Entertainment

6.5

Comfort

7.3

Boarding

7.7

Overall

7.5

Crew

8.2

Reviews

1 / 10

We had a great experience with the flight back to Toronto and crew were awesome.

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 $485, but on average you can expect to pay $554.

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

    Currently priced at $599, United Airlines will fly you from St. Louis to Ottawa and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Air Canada and WestJet - these airlines can fly you to your destination from $627 and $695, respectively.

  • 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 5/14.

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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Springfield to Toronto Island flights

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 2,632,958 searches. Data last updated May 14, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$293Average$800FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$301Average$614FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
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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.
First Class
Business Class
Prem Econ Class
Economy 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 Ottawa?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from St. Louis to Ottawa. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Millions of users choose and trust Cheapflights to book the best flight deals from St. Louis to Ottawa for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Yes! Cheapflights helps users easily find flights from St. Louis to Ottawa with no change fees.

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

Of course! You can now track prices for flights from St. Louis to Ottawa and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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