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Cheap flights from St. Louis (STL) to Ottawa (YOW) from $265

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 6/21. 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 14 — May 211
From?
To?
Tue 5/14
Tue 5/21
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 9, 2024.

Popular in

November

Cheapest in

January

Round-trip from

$283

One-way from

$265
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)?

It’s typically best to fly out from St. Louis to Ottawa at noon. Doing so could potentially save you 1% 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 2,749,864 searches. Data last updated May 9, 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 9/146:02 amSTL - YOW
1 stop5h 40mUnited Airlines
Wed 9/1811:25 amYOW - STL
1 stop5h 24mUnited Airlines
Deal found 5/6$599
Wed 9/411:10 amSTL - YOW
2 stops9h 53mUnited Airlines
Wed 9/116:05 amYOW - STL
2 stops10h 44mUnited Airlines
Deal found 5/7$613
Fri 9/2711:09 amSTL - YOW
2 stops11h 40mUnited Airlines
Mon 9/3011:20 amYOW - STL
1 stop5h 29mUnited Airlines
Deal found 5/7$691
Tue 6/46:08 amSTL - YOW
1 stop5h 37mUnited Airlines
Tue 6/116:00 pmYOW - STL
2 stops19h 46mUnited Airlines
Deal found 5/7$694
Fri 9/2711:09 amSTL - YOW
2 stops11h 40mUnited Airlines
Mon 9/305:55 pmYOW - STL
2 stops17h 12mUnited Airlines
Deal found 5/7$779

Cheap Air Canada flights from St. Louis to Ottawa

Explore cheap flight options specifically provided by Air Canada 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 2,749,864 searches. Data last updated May 9, 2024.
Some of the best deals we've found on Air Canada flights traveling from St. Louis to Ottawa. Check back soon if you're not seeing flights that suit your needs.
Sat 7/64:05 pmSTL - YOW
1 stop6h 42mAir Canada
Sat 7/139:20 amYOW - STL
1 stop11h 41mAir Canada
Deal found 5/8$619
Sat 9/1411:10 amSTL - YOW
1 stop9h 39mAir Canada
Wed 9/188:10 amYOW - STL
2 stops8h 39mAir Canada
Deal found 5/6$627

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 2,749,864 searches. Prices were last updated on May 9, 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 6/42:35 pmSTL - YOW
2 stops20h 07mMultiple Airlines
Tue 6/118:50 amYOW - STL
3 stops29h 15mMultiple Airlines
Deal found 5/7$482
Tue 6/410:34 amSTL - YOW
3 stops29h 53mMultiple Airlines
Tue 6/118:50 amYOW - STL
3 stops29h 15mMultiple Airlines
Deal found 5/7$502
Tue 6/46:08 amSTL - YOW
1 stop5h 37mMultiple Airlines
Tue 6/1110:00 amYOW - STL
1 stop6h 21mMultiple Airlines
Deal found 5/7$680
Tue 6/46:08 amSTL - YOW
1 stop5h 37mUnited Airlines
Tue 6/116:00 pmYOW - STL
2 stops19h 46mUnited Airlines
Deal found 5/7$694
Wed 5/87:51 pmSTL - YOW
2 stops27h 37mMultiple Airlines
Sat 5/114:15 pmYOW - STL
1 stop15h 58mMultiple Airlines
Deal found 5/6$709
Wed 5/811:36 amSTL - YOW
2 stops11h 52mMultiple Airlines
Sat 5/118:35 amYOW - STL
3 stops23h 25mMultiple Airlines
Deal found 5/6$887
Wed 5/811:00 amSTL - YOW
1 stop4h 32mAir Canada
Sat 5/112:00 pmYOW - STL
1 stop7h 01mAir Canada
Deal found 5/6$1,099
Wed 5/811:00 amSTL - YOW
1 stop5h 40mAir Canada
Sat 5/112:00 pmYOW - STL
1 stop7h 01mAir Canada
Deal found 5/8$1,100
Wed 5/810:10 amSTL - YOW
2 stops10h 49mUnited Airlines
Sat 5/115:24 pmYOW - STL
1 stop5h 25mUnited Airlines
Deal found 5/8$1,118

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 2,749,864 searches. Data last updated May 9, 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 6/42:35 pmSTL - YOW
2 stops20h 07mMultiple Airlines
Tue 6/118:50 amYOW - STL
3 stops29h 15mMultiple Airlines
Deal found 5/7$482
Tue 6/410:34 amSTL - YOW
3 stops29h 53mMultiple Airlines
Tue 6/118:50 amYOW - STL
3 stops29h 15mMultiple Airlines
Deal found 5/7$502
Wed 9/48:25 amSTL - YOW
1 stop4h 50mMultiple Airlines
Wed 9/1110:00 amYOW - STL
1 stop6h 20mMultiple Airlines
Deal found 5/7$594
Sat 9/146:02 amSTL - YOW
1 stop5h 40mUnited Airlines
Wed 9/1811:25 amYOW - STL
1 stop5h 24mUnited Airlines
Deal found 5/6$599
Wed 9/49:30 amSTL - YOW
2 stops13h 27mMultiple Airlines
Wed 9/1110:00 amYOW - STL
1 stop6h 20mMultiple Airlines
Deal found 5/7$604
Wed 9/411:10 amSTL - YOW
2 stops9h 53mUnited Airlines
Wed 9/116:05 amYOW - STL
2 stops10h 44mUnited Airlines
Deal found 5/7$613
Sat 7/64:05 pmSTL - YOW
1 stop6h 42mAir Canada
Sat 7/139:20 amYOW - STL
1 stop11h 41mAir Canada
Deal found 5/8$619
Sat 9/1411:10 amSTL - YOW
1 stop9h 39mAir Canada
Wed 9/188:10 amYOW - STL
2 stops8h 39mAir Canada
Deal found 5/6$627
Tue 6/46:08 amSTL - YOW
1 stop5h 37mMultiple Airlines
Tue 6/1110:00 amYOW - STL
1 stop6h 21mMultiple Airlines
Deal found 5/7$680

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 2,749,864 searches. Data last updated May 9, 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.
Fri 6/217:30 pmSTL - YOW
2 stops22h 27mMultiple Airlines
Deal found 5/7$265
Fri 6/216:08 amSTL - YOW
1 stop5h 37mUnited Airlines
Deal found 5/7$272
Fri 6/214:45 pmSTL - YOW
3 stops20h 04mMultiple Airlines
Deal found 5/7$337

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 2,749,864 searches. Data last updated May 9, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$482 - $760

Route

Depart

Return

Price

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Tue 6/4

2 stops20h 07m

Ottawa

Tue 6/11

3 stops29h 15m

$482

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Tue 6/4

3 stops29h 53m

Ottawa

Tue 6/11

3 stops29h 15m

$502

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Wed 9/4

1 stop4h 50m

Ottawa

Wed 9/11

1 stop6h 20m

$594

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Sat 9/14

1 stop5h 40m

Ottawa

Wed 9/18

1 stop5h 24m

$599

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Wed 9/4

2 stops13h 27m

Ottawa

Wed 9/11

1 stop6h 20m

$604

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Wed 9/4

2 stops9h 53m

Ottawa

Wed 9/11

2 stops10h 44m

$613

Lambert-St LouisOttawa

STL - YOW

STLYOW

Lambert-St Louis

Sat 7/6

1 stop6h 42m

Ottawa

Sat 7/13

1 stop11h 41m

$619

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

Sat 7/6

2 stops27h 26m

Ottawa

Sat 7/13

2 stops19h 45m

$760

Flights are sorted by cheapest first

Deals found on 5/7

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 5, 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 $291 while a round-trip flight costs $600. Price data was last updated on May 5, 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 $486). 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

$304

May

$335

June

$356

July

$486

August

$454

September

$463

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 9, 2024.
Peruse reviews from past customers who have flown with United Airlines, Air Canada 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
7.6
Good
2,942 reviews
Check prices

Boarding

7.7

Entertainment

6.5

Food

6.5

Overall

7.6

Comfort

7.3

Crew

8.2

Reviews

1 / 10

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

WestJet
7.6
Good
2,942 reviews
WestJet
7.6
Good
2,942 reviews
Check prices

Boarding

7.7

Entertainment

6.5

Food

6.5

Overall

7.6

Comfort

7.3

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
11,050 reviews
WestJet
7.6
Good
2,942 reviews
Check prices

Boarding

7.7

Entertainment

6.5

Food

6.5

Overall

7.6

Comfort

7.3

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
6,919 reviews
WestJet
7.6
Good
2,942 reviews
Check prices

Boarding

7.7

Entertainment

6.5

Food

6.5

Overall

7.6

Comfort

7.3

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 $482, but on average you can expect to pay $667.

  • 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 $619 and $760, 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 5/8.

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.

St. Louis to Pearson Intl flights
Kansas City to Pearson Intl flights
Kansas City to Ottawa flights
Kansas City to Toronto Island flights
Springfield to Pearson Intl flights
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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 2,749,864 searches. Data last updated May 9, 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.
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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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