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Cheap flights from St. Louis (STL) to Ottawa (YOW) from $524

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 5/14. 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 9 — May 161
From?
To?
Thu 5/9
Thu 5/16
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 4, 2024.

Popular in

November

Cheapest in

January

Average price

$707

Round-trip from

$283
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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Average for round-trip flights in May 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 87%.

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)?

It’s typically best to fly out from St. Louis to Ottawa at noon. Doing so could potentially save you 6% on the flight price compared to flying in the morning, which is usually more expensive.

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 2,795,183 searches. Data last updated May 4, 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
Wed 7/248:05 amSTL - YOW
1 stop12h 47mUnited Airlines
Wed 7/316:03 pmYOW - STL
1 stop5h 34mUnited Airlines
Deal found 5/2$695
Sat 9/146:02 amSTL - YOW
1 stop5h 40mUnited Airlines
Wed 9/1811:25 amYOW - STL
1 stop4h 28mUnited Airlines
Deal found 5/2$743
Sat 9/1411:10 amSTL - YOW
2 stops9h 53mUnited Airlines
Wed 9/1811:25 amYOW - STL
1 stop5h 24mUnited Airlines
Deal found 5/2$752
Thu 5/308:25 amSTL - YOW
1 stop14h 30mUnited Airlines
Thu 6/66:05 amYOW - STL
2 stops10h 36mUnited Airlines
Deal found 5/2$795
Sun 6/28:05 amSTL - YOW
1 stop12h 43mUnited Airlines
Sun 6/96:05 amYOW - STL
2 stops10h 36mUnited Airlines
Deal found 5/3$806
Wed 7/246:30 amSTL - YOW
2 stops11h 25mUnited Airlines
Wed 7/316:05 amYOW - STL
2 stops10h 35mUnited Airlines
Deal found 5/2$857

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 2,795,183 searches. Data last updated May 4, 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.
Tue 10/297:10 amSTL - YOW
2 stops12h 36mWestJet
Sat 11/26:00 amYOW - STL
2 stops16h 31mWestJet
Deal found 5/2$715
Thu 5/303:27 pmSTL - YOW
2 stops28h 21mWestJet
Thu 6/69:35 pmYOW - STL
2 stops18h 22mWestJet
Deal found 5/2$717

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 2,795,183 searches. Prices were last updated on May 4, 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.
Tue 5/147:51 pmSTL - YOW
2 stops14h 07mMultiple Airlines
Wed 5/154:15 pmYOW - STL
1 stop15h 53mMultiple Airlines
Deal found 5/4$524
Sun 6/27:30 pmSTL - YOW
3 stops18h 59mMultiple Airlines
Sun 6/97:20 amYOW - STL
2 stops11h 45mMultiple Airlines
Deal found 5/3$534
Tue 5/2110:34 amSTL - YOW
2 stops24h 08mMultiple Airlines
Wed 5/224:15 pmYOW - STL
2 stops26h 14mMultiple Airlines
Deal found 5/4$538
Sun 6/27:30 pmSTL - YOW
2 stops19h 22mMultiple Airlines
Sun 6/97:20 amYOW - STL
2 stops11h 45mMultiple Airlines
Deal found 5/3$539
Tue 5/2110:34 amSTL - YOW
3 stops22h 55mMultiple Airlines
Wed 5/224:15 pmYOW - STL
2 stops26h 14mMultiple Airlines
Deal found 5/4$544
Sun 6/27:30 pmSTL - YOW
3 stops19h 59mMultiple Airlines
Sun 6/97:20 amYOW - STL
3 stops31h 31mMultiple Airlines
Deal found 5/3$576
Tue 5/2110:34 amSTL - YOW
3 stops25h 05mMultiple Airlines
Wed 5/227:15 pmYOW - STL
3 stops24h 25mMultiple Airlines
Deal found 5/4$577
Tue 5/1410:34 amSTL - YOW
2 stops12h 54mMultiple Airlines
Wed 5/1512:00 pmYOW - STL
3 stops30h 29mMultiple Airlines
Deal found 5/4$700
Thu 5/303:27 pmSTL - YOW
2 stops28h 21mWestJet
Thu 6/69:35 pmYOW - STL
2 stops18h 22mWestJet
Deal found 5/2$717

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 2,795,183 searches. Data last updated May 4, 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.
Tue 5/147:51 pmSTL - YOW
2 stops14h 07mMultiple Airlines
Wed 5/154:15 pmYOW - STL
1 stop15h 53mMultiple Airlines
Deal found 5/4$524
Sun 6/27:30 pmSTL - YOW
3 stops18h 59mMultiple Airlines
Sun 6/97:20 amYOW - STL
2 stops11h 45mMultiple Airlines
Deal found 5/3$534
Tue 5/2110:34 amSTL - YOW
2 stops24h 08mMultiple Airlines
Wed 5/224:15 pmYOW - STL
2 stops26h 14mMultiple Airlines
Deal found 5/4$538
Sun 6/27:30 pmSTL - YOW
2 stops19h 22mMultiple Airlines
Sun 6/97:20 amYOW - STL
2 stops11h 45mMultiple Airlines
Deal found 5/3$539
Tue 5/2110:34 amSTL - YOW
3 stops22h 55mMultiple Airlines
Wed 5/224:15 pmYOW - STL
2 stops26h 14mMultiple Airlines
Deal found 5/4$544
Sun 6/27:30 pmSTL - YOW
3 stops19h 59mMultiple Airlines
Sun 6/97:20 amYOW - STL
3 stops31h 31mMultiple Airlines
Deal found 5/3$576
Tue 5/2110:34 amSTL - YOW
3 stops25h 05mMultiple Airlines
Wed 5/227:15 pmYOW - STL
3 stops24h 25mMultiple Airlines
Deal found 5/4$577
Wed 7/248:05 amSTL - YOW
1 stop12h 47mUnited Airlines
Wed 7/316:03 pmYOW - STL
1 stop5h 34mUnited Airlines
Deal found 5/2$695
Tue 5/1410:34 amSTL - YOW
2 stops12h 54mMultiple Airlines
Wed 5/1512:00 pmYOW - STL
3 stops30h 29mMultiple Airlines
Deal found 5/4$700

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 2,795,183 searches. Data last updated May 4, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$534 - $784

Route

Depart

Return

Price

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Sun 6/2

3 stops18h 59m

Ottawa

Sun 6/9

2 stops11h 45m

$534

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Sun 6/2

2 stops19h 22m

Ottawa

Sun 6/9

2 stops11h 45m

$539

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Sun 6/2

3 stops19h 59m

Ottawa

Sun 6/9

3 stops31h 31m

$576

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Wed 7/24

1 stop12h 47m

Ottawa

Wed 7/31

1 stop5h 34m

$695

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Tue 10/29

2 stops12h 36m

Ottawa

Sat 11/2

2 stops16h 31m

$715

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Thu 5/30

2 stops28h 21m

Ottawa

Thu 6/6

2 stops18h 22m

$717

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Sat 9/14

1 stop5h 40m

Ottawa

Wed 9/18

1 stop4h 28m

$743

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Sat 9/14

2 stops9h 53m

Ottawa

Wed 9/18

2 stops8h 39m

$780

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Sun 6/2

1 stop8h 27m

Ottawa

Sun 6/9

1 stop7h 01m

$784

Flights are sorted by cheapest first

Deals found on 5/3

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 April 28, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Ottawa flight should consider departing on Monday mornings when fares are most often at their lowest. Friday 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 $0 while a round-trip flight costs $676. Price data was last updated on April 28, 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 $488). 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

$381

June

$383

July

$488

August

$454

September

$459

October

$360

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 4, 2024.
Peruse reviews from past customers who have flown with United Airlines, WestJet and Air Canada 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
7.6
Good
2,962 reviews
Check prices

Food

6.5

Entertainment

6.5

Crew

8.2

Overall

7.6

Boarding

7.7

Comfort

7.3

Reviews

1 / 10

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

WestJet
7.6
Good
2,962 reviews
WestJet
7.6
Good
2,962 reviews
Check prices

Food

6.5

Entertainment

6.5

Crew

8.2

Overall

7.6

Boarding

7.7

Comfort

7.3

Reviews

1 / 10

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

United Airlines
7.4
Good
11,125 reviews
WestJet
7.6
Good
2,962 reviews
Check prices

Food

6.5

Entertainment

6.5

Crew

8.2

Overall

7.6

Boarding

7.7

Comfort

7.3

Reviews

1 / 10

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

Air Canada
7.0
Good
6,904 reviews
WestJet
7.6
Good
2,962 reviews
Check prices

Food

6.5

Entertainment

6.5

Crew

8.2

Overall

7.6

Boarding

7.7

Comfort

7.3

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 $600 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Ottawa for under $600. The cheapest flight booked recently is on Multiple Airlines for just $534, but on average you can expect to pay $722.

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

    Currently priced at $695, 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 WestJet and Air Canada - these airlines can fly you to your destination from $715 and $780, 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 5/4.

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 2,795,183 searches. Data last updated May 4, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$293Average$800FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest$299Average$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.
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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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