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Cheap flights from St. Louis to Ottawa from $217

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Ottawa departing on 7/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from St. Louis to Ottawa

Cheap round-trip flights

 Logo
10:37 am - 12:22 amSTL-YOW
12h 45m2 stops
 Logo
4:25 pm - 2:21 pmYOW-STL
22h 56m1 stop
Thu, Aug 14 - Thu, Aug 21
 Logo
10:37 am - 12:22 amSTL-YOW
12h 45m2 stops
 Logo
7:00 am - 1:32 pmYOW-STL
31h 32m3 stops
Thu, Aug 14 - Thu, Aug 21
 Logo
10:37 am - 12:22 amSTL-YOW
12h 45m2 stops
 Logo
3:50 pm - 1:32 pmYOW-STL
22h 42m2 stops
Thu, Aug 14 - Thu, Aug 21
 Logo
10:47 am - 10:21 amSTL-YOW
22h 34m3 stops
 Logo
4:25 pm - 4:31 pmYOW-STL
25h 06m2 stops
Mon, Jul 21 - Mon, Jul 28
 Logo
2:30 pm - 12:58 pmSTL-YOW
21h 28m3 stops
 Logo
2:20 pm - 1:32 pmYOW-STL
24h 12m3 stops
Thu, Aug 14 - Thu, Aug 21
Air Canada Logo
9:15 am - 3:04 pmSTL-YOW
4h 49m1 stop
Air Canada Logo
10:15 am - 3:29 pmYOW-STL
6h 14m1 stop
$637Air Canada
Find Deal
Thu, Oct 23 - Mon, Oct 27
United Airlines Logo
5:15 am - 10:05 pmSTL-YOW
15h 50m2 stops
United Airlines Logo
5:15 am - 11:53 pmYOW-STL
19h 38m2 stops
$669United Airlines
Find Deal
Sat, Aug 16 - Sat, Aug 23
Air Canada Logo
1:30 pm - 8:15 pmSTL-YOW
5h 45m1 stop
Air Canada Logo
2:25 pm - 8:00 pmYOW-STL
6h 35m1 stop
$690Air Canada
Find Deal
Thu, Aug 14 - Thu, Aug 21
United Airlines Logo
6:33 am - 5:06 pmSTL-YOW
9h 33m1 stop
United Airlines Logo
5:25 pm - 9:32 pmYOW-STL
5h 07m1 stop
$705United Airlines
Find Deal
Sat, Aug 16 - Sat, Aug 23
Delta Logo
1:29 pm - 12:22 amSTL-YOW
9h 53m2 stops
Delta Logo
5:55 am - 5:08 pmYOW-STL
12h 13m2 stops
$880Delta
Find Deal
Mon, Jul 21 - Mon, Jul 28

United Airlines flights from St. Louis to Ottawa

Our best United Airlines deals on St. Louis to Ottawa flight tickets
United Airlines
Aug 16
STL5:15 amLambert-St Louis
15h 50m
2 stops
YOW10:05 pmOttawa
Aug 23
YOW5:15 amOttawa
19h 38m
2 stops
STL11:53 pmLambert-St Louis
United Airlines
Aug 16
STL6:33 amLambert-St Louis
9h 33m
1 stop
YOW5:06 pmOttawa
Aug 23
YOW5:25 pmOttawa
5h 07m
1 stop
STL9:32 pmLambert-St Louis
United Airlines
Oct 23
STL6:30 amLambert-St Louis
13h 39m
2 stops
YOW9:09 pmOttawa
Oct 27
YOW12:05 pmOttawa
10h 49m
2 stops
STL9:54 pmLambert-St Louis

Air Canada flights from St. Louis to Ottawa

Our best Air Canada deals on St. Louis to Ottawa flight tickets
Air Canada
Oct 23
STL9:15 amLambert-St Louis
4h 49m
1 stop
YOW3:04 pmOttawa
Oct 27
YOW10:15 amOttawa
6h 14m
1 stop
STL3:29 pmLambert-St Louis
Air Canada
Aug 14
STL1:30 pmLambert-St Louis
5h 45m
1 stop
YOW8:15 pmOttawa
Aug 21
YOW2:25 pmOttawa
6h 35m
1 stop
STL8:00 pmLambert-St Louis
Air Canada
Jul 21
STL1:30 pmLambert-St Louis
4h 35m
1 stop
YOW7:05 pmOttawa
Jul 28
YOW11:05 amOttawa
9h 55m
1 stop
STL8:00 pmLambert-St Louis

See travel insights to Ottawa from

How to get the cheapest flight ticket from St. Louis to Ottawa

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Ottawa?

The cheapest day to depart from St. Louis to Ottawa is on a Saturday. Travelers who choose to depart for Ottawa on a Saturday will often find tickets for as low as $407. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Ottawa on Monday is $860.

What is the cheapest time of day to depart on your flight to Ottawa?

In the afternoon is the cheapest time of day to fly from St. Louis to Ottawa when you can find flight prices for as low as $615. Flying to Ottawa in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $682 on average. Flights to Ottawa from St. Louis in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from St. Louis to Ottawa

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Ottawa according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Ottawa (STL to YOW) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Ottawa

Best Price Found

$217

Fastest flight time

4h 35m

Direct flights

None

Airports in Ottawa

1 airport
The best one-way flight to Ottawa from St. Louis in the past 72 hours is $217. The best round-trip flight deal from St. Louis to Ottawa found on momondo in the last 72 hours is $449.
The fastest flight from St. Louis to Ottawa takes 4h 35m
There are no direct flights from St. Louis to Ottawa. Popular non-direct route for this connection is Lambert-St Louis Airport - Ottawa Airport.
There is 1 airport near Ottawa: Ottawa (YOW)

  • How far is Lambert-St Louis to Ottawa by plane?

    There are 877.2 mi between Lambert-St Louis and Ottawa. By plane, this route typically takes 4h 35m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Ottawa Airport?

    Prices for flights from Lambert-St Louis Airport to Ottawa Airport are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Ottawa Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Ottawa Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Ottawa Airport.

  • What documentation or ID do you need to fly to Ottawa Airport?

    The required travel and health documents for your Ottawa Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ottawa Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from St. Louis to Ottawa?


Best airlines flying from St. Louis to Ottawa

Compare and see reviews for airlines that fly from St. Louis to Ottawa with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $330Free CancellationRating
7.1
9,681 reviews
Search Air Canada flights
United AirlinesPriceFrom $434Free CancellationRating
7.4
8,861 reviews
Search United Airlines flights

Traveling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Gatineau
Smiths Falls
Calabogie
Brockville
Pembroke
Prescott
Winchester
Wakefield
Petawawa

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Ottawa?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Ottawa. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to Ottawa with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Ottawa from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Ottawa?

momondo provides multiple filters to help you find the best flight to Ottawa from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from St. Louis to Ottawa right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Ottawa from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.


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1 adult
Tue 7/8
Tue 7/15

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