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STL - YOW

$617 Find cheap flights from St. Louis to Ottawa

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Ottawa departing on 6/20. 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.
1 adult
0 bags
Sat 6/29
Sat 7/6

Search hundreds of travel sites at once for deals on flights to Ottawa

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Ottawa, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Ottawa, as well as popular online travel agencies
In the last 7 days travelers have searched 42,686,544 times on KAYAK, and here is why:

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Cheap flight deals from St. Louis to Ottawa (STL-YOW)

 
These are the cheapest deals for flights from St. Louis to Ottawa currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from St. Louis to Ottawa

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from St. Louis to Ottawa.

Recent one-way flight deals from St. Louis to Ottawa

Only flying one-way? Below are some of the best one-way flight deals from St. Louis to Ottawa found on KAYAK recently.

Recent last minute flight deals from St. Louis to Ottawa

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from St. Louis to Ottawa.

Recent direct flight deals from St. Louis to Ottawa

The latest deals for direct flights from St. Louis to Ottawa so you can sit back and relax without the need for a layover.

Cheap bus & train deals from St. Louis to Ottawa

Find recent round-trip train or bus tickets from St. Louis to Ottawa.

All round-trip flight deals to Ottawa

The cheapest plane tickets to Ottawa found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
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12:15 pm - 11:14 amSTL-YOW
21h 59m3 stops
9:05 am - 7:22 pmYOW-STL
11h 17m2 stops
Thu, Jun 20 - Thu, Jun 27
8:12 pm - 8:07 pmSTL-YOW
22h 55m2 stops
9:05 am - 7:22 pmYOW-STL
11h 17m2 stops
Thu, Jun 20 - Thu, Jun 27
3:07 pm - 2:31 pmSTL-YOW
22h 24m2 stops
9:35 pm - 2:50 pmYOW-STL
42h 15m3 stops
Fri, Jun 14 - Sun, Jun 23
8:05 am - 5:04 pmSTL-YOW
7h 59m1 stop
10:00 am - 3:21 pmYOW-STL
6h 21m1 stop
$739Air Canada
Find Deal
Wed, Jul 10 - Mon, Jul 15
10:19 am - 11:59 pmSTL-YOW
12h 40m2 stops
6:03 pm - 10:37 pmYOW-STL
5h 34m1 stop
$752United Airlines
Find Deal
Wed, Jul 10 - Mon, Jul 15
8:35 pm - 6:54 amSTL-YOW
33h 19m3 stops
9:35 pm - 2:50 pmYOW-STL
42h 15m3 stops
Fri, Jun 14 - Sun, Jun 23
3:07 pm - 2:31 pmSTL-YOW
22h 24m2 stops
7:20 am - 6:05 pmYOW-STL
11h 45m2 stops
Fri, Jun 14 - Sun, Jun 23
6:30 am - 5:04 pmSTL-YOW
9h 34m1 stop
6:38 am - 2:16 pmYOW-STL
8h 38m1 stop
$900Air Canada
Find Deal
Fri, Jun 14 - Sun, Jun 23
8:25 am - 11:55 pmSTL-YOW
14h 30m1 stop
6:05 am - 2:18 pmYOW-STL
9h 13m2 stops
$905United Airlines
Find Deal
Thu, Jun 20 - Thu, Jun 27
6:30 am - 9:48 pmSTL-YOW
14h 18m1 stop
6:05 am - 3:41 pmYOW-STL
10h 36m2 stops
$1,035United Airlines
Find Deal
Fri, Jun 14 - Sun, Jun 23

Flights from St. Louis to Ottawa - Travel Insights & Trends

Get data-powered insights and trends into flights from St. Louis to Ottawa to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from St. Louis to Ottawa?

The average price of all flights from St. Louis to Ottawa clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from St. Louis to Ottawa, look for departures on Mondays and avoid leaving on a Friday, as it's usually the priciest day. When flying back from Ottawa, Monday is the cheapest day to fly and Wednesday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from St. Louis to Ottawa, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from St. Louis to Ottawa is January, where tickets cost $291 on average. On the other hand, the most expensive months are November and May, where the average cost of tickets is $818 and $707 respectively.

Good to know

Low season

February

High season

September

Cheapest flight

$617
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly with an average 11% increase in price.
Flight from St. Louis to Ottawa

When to book flights from St. Louis to Ottawa

Are your dates flexible? Find out the best times to travel from St. Louis to Ottawa based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Ottawa

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

    In the last 3 days, the lowest price for a flight from St. Louis to Ottawa was $617 for a round-trip ticket.

  • Do I need a passport to fly between St. Louis and Ottawa?

    Yes, you'll most likely have to show a valid passport before boarding the plane in St. Louis and on arrival in Ottawa.

  • Which aircraft models fly most regularly from St. Louis to Ottawa?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Ottawa?

    Star Alliance is the only airline alliance operating flights between St. Louis and Ottawa.

  • Which is the best airline for flights from St. Louis to Ottawa, United Airlines or Air Canada?

    The two airlines most popular with KAYAK users for flights from St. Louis to Ottawa are United Airlines and Air Canada. With an average price for the route of $800 and an overall rating of 7.4, United Airlines is the most popular choice. Air Canada is also a great choice for the route, with an average price of $614 and an overall rating of 7.0.

  • How does KAYAK find such low prices on flights from St. Louis to Ottawa?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Ottawa.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Ottawa?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ottawa from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Ottawa?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ottawa with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and YOW can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Ottawa?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ottawa from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airlines flying from St. Louis to Ottawa

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Ottawa. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Ottawa? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 10777 reviews
6.7Food
7.1Entertainment
7.2Comfort
7.7Boarding
8.1Crew
Airline reviews

The flight and boarding were easy peasy. I was traveling with my 4-year-old, so a smooth boarding experience was especially appreciated. My only piece of feedback is really about where our gate was in O'Hare. They've shoved four gates into a tiny corner of the B terminal and there isn't early enough room or seating for everyone. Not United's problem, but did dent the overall experience.

10.0 ExcellentEllen, May 2024GSP - ORD
Read more about United Airlines reviews

The flight and boarding were easy peasy. I was traveling with my 4-year-old, so a smooth boarding experience was especially appreciated. My only piece of feedback is really about where our gate was in O'Hare. They've shoved four gates into a tiny corner of the B terminal and there isn't early enough room or seating for everyone. Not United's problem, but did dent the overall experience.

We liked the fully reclinable seats. Had center seats, so it was difficult to talk to spouse. Crew was great

Aisle chair was good and liked the foot bar preventing you from putting your foot in the isle, The breakfast on this international flight to Zurich was horrible (Europeans, specially, used to good food) may make this a dealbreaker for booking with United Airlines again. I agreed with my Spanish fellow passenger.

Dinner was okay but the breakfast was not eatable on the flight San Francisco to Zurich.

There was no screens on board AND the WiFi didn’t work. My seat was broken and couldn’t recline so I couldn’t even sleep. The flight attendants didn’t offer anything to make it more comfortable. It was such an old cramped plane, when the person in front of me reclined I couldn’t even open my tray table. All the United ads talk about guaranteeing everyone gets a screen!

Fine. Though no food or entertainment so the survey needs to be updated with those options.

Backpack should NOT allowed put in the flight bin , only put it under the seat. I can't find space put my carry on luggage!!! and I pay for it ! that was very bad experience

Standard flight experience, but there is only power at the seat to row 20 on the aircraft, on my initial check in it did not say that was the case

I feel like they have upgraded the app since I last flew United and I found it to be super helpful. I had stopped flying United unless absolutely necessary and my experience on this trip indicates they have been working hard to improve their services.

The ride was good but no food ot entertainment hence, it was just over an hour flight.

Unable to initiate refund/reschedule the ticket #worst experience #lost 900$

Flight was delayed for almost 3 hours. Communication of gate change was poor. Email and screen said one gate and it was a different gate from that. Gate changed first to 64 B and then to 64 C. Originally it was 68B. 64C was not communicated properly!

This was a red eye return, so I doubt there would be anyway to make it better. Other than adding beds.

Direct nonstop flight was great. Flight was delayed and the crew announced a 2h delay on the sound system. 30 min or so later I hear my name on the sound system for immediate board. Several other passangers were late too. Reason: The crew incorrectly announced a 2h delay when in reality they meant a new boarding time at 2pm.

Flight was on time early arrival better entertainment good staff.everything was excellent

I don’t think there was entertainment? No mention of it. It was a good flight. Only complaint was my seat cushion was not attached and kept slipping.

My second flight ended up being through United and it was fine. Again, just frustrating that it was so late.

First time flying Air Canada and the trip was very pleasant! They did a great job getting us out of Toronto and into Rome (early!) For an international flight it was very enjoyable.

It was awful. For a 37 minute flight time,we had 1:30 hours delay. If someone had a connection flight he or she couldn’t reach for sure. The only positive point was online check in.

You do not have a space for flight cancelled. BUT!!! Air Canada handled it great. Was booked on another airline for the next day. The original flight was booked solid. But he precheck by the maintenance found a mechanical problem and the plane was not safe to fly. It was an inconvenience to have to wait until next day but I would rather arrive safely.

St. Louis - Ottawa Flights

Departure:

St. Louis (STL)United States

Destination:

Ottawa (YOW)Canada

Return flight deals:

Ottawa - St. Louis

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