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Cheap flights from St. Louis to Ottawa from $161

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Ottawa

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:44 pm - 12:01 amSTL  Lambert-St Louis-YOW Ottawa
28h 17m2 stops Atlanta Hartsfield-Jackson Calgary
Multiple Airlines Logo
3:05 pm - 6:39 pmYOW  Ottawa-STL Lambert-St Louis
28h 34m2 stops Fort Lauderdale Atlanta Hartsfield-Jackson
$539Multiple Airlines
Wed, Nov 11 - Wed, Nov 18
Multiple Airlines Logo
6:44 pm - 5:58 pmSTL  Lambert-St Louis-YOW Ottawa
22h 14m3 stops Atlanta Hartsfield-Jackson Fort Lauderdale Toronto Pearson Intl
Multiple Airlines Logo
6:55 pm - 6:39 pmYOW  Ottawa-STL Lambert-St Louis
24h 44m2 stops Calgary Atlanta Hartsfield-Jackson
$546Multiple Airlines
Wed, Nov 11 - Wed, Nov 18
Multiple Airlines Logo
6:44 pm - 5:58 pmSTL  Lambert-St Louis-YOW Ottawa
22h 14m3 stops Atlanta Hartsfield-Jackson Fort Lauderdale Toronto Pearson Intl
Multiple Airlines Logo
5:40 pm - 6:39 pmYOW  Ottawa-STL Lambert-St Louis
25h 59m3 stops Toronto Pearson Intl Calgary Atlanta Hartsfield-Jackson
$555Multiple Airlines
Wed, Nov 11 - Wed, Nov 18
Multiple Airlines Logo
6:13 pm - 4:44 pmSTL  Lambert-St Louis-YOW Ottawa
21h 31m1 stop Orlando
Multiple Airlines Logo
6:55 pm - 9:49 amYOW  Ottawa-STL Lambert-St Louis
15h 54m2 stops Calgary Atlanta Hartsfield-Jackson
$652Multiple Airlines
Wed, Dec 9 - Fri, Dec 11
Multiple Airlines Logo
6:44 pm - 2:30 pmSTL  Lambert-St Louis-YOW Ottawa
18h 46m2 stops Atlanta Hartsfield-Jackson Newark
Multiple Airlines Logo
7:40 am - 2:46 pmYOW  Ottawa-STL Lambert-St Louis
32h 06m1 stop Cancun
$656Multiple Airlines
Wed, Nov 11 - Wed, Nov 18
Multiple Airlines Logo
4:30 pm - 2:45 pmSTL  Lambert-St Louis-YOW Ottawa
21h 15m2 stops Orlando Boston Logan Intl
Multiple Airlines Logo
8:00 am - 11:16 pmYOW  Ottawa-STL Lambert-St Louis
16h 16m1 stop Orlando
$704Multiple Airlines
Sun, Oct 25 - Sun, Nov 1
United Airlines Logo
5:00 pm - 1:11 pmSTL  Lambert-St Louis-YOW Ottawa
19h 11m1 stop Newark
United Airlines Logo
6:00 am - 4:59 pmYOW  Ottawa-STL Lambert-St Louis
11h 59m2 stops Newark Chicago O'Hare Intl
$758United Airlines
Wed, Oct 28 - Sat, Oct 31
Air Canada Logo
4:05 pm - 9:45 pmSTL  Lambert-St Louis-YOW Ottawa
4h 40m1 stop Toronto Pearson Intl
Air Canada Logo
10:00 am - 3:26 pmYOW  Ottawa-STL Lambert-St Louis
6h 26m1 stop Toronto Pearson Intl
$759Air Canada
Fri, Mar 26 - Sun, Mar 28
United Airlines Logo
7:30 am - 9:56 pmSTL  Lambert-St Louis-YOW Ottawa
13h 26m2 stops Chicago O'Hare Intl Newark
United Airlines Logo
6:00 am - 4:59 pmYOW  Ottawa-STL Lambert-St Louis
11h 59m2 stops Newark Chicago O'Hare Intl
$763United Airlines
Wed, Oct 28 - Sat, Oct 31
United Airlines Logo
6:09 am - 7:27 pmSTL  Lambert-St Louis-YOW Ottawa
12h 18m2 stops Newark Washington, D.C. Dulles Intl
United Airlines Logo
6:00 am - 4:59 pmYOW  Ottawa-STL Lambert-St Louis
11h 59m2 stops Newark Chicago O'Hare Intl
$763United Airlines
Wed, Oct 28 - Sat, Oct 31

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WestJet flights from St. Louis to Ottawa

Our best WestJet deals on St. Louis to Ottawa flight tickets
WestJet
Nov 10
STL2:31 pmLambert-St Louis
32h 30m
2 stops
YOW12:01 amOttawa
Nov 20
YOW6:10 amOttawa
27h 58m
2 stops
STL9:08 amLambert-St Louis
$918
WestJet
Oct 1
STL6:40 amLambert-St Louis
21h 55m
2 stops
YOW5:35 amOttawa
Oct 6
YOW8:15 pmOttawa
15h 36m
2 stops
STL10:51 amLambert-St Louis
$1,249
WestJet
Oct 1
STL6:15 amLambert-St Louis
22h 20m
2 stops
YOW5:35 amOttawa
Oct 6
YOW8:15 pmOttawa
18h 05m
2 stops
STL1:20 pmLambert-St Louis
$1,289

American Airlines flights from St. Louis to Ottawa

Our best American Airlines deals on St. Louis to Ottawa flight tickets
American Airlines
Dec 7
STL6:00 amLambert-St Louis
10h 58m
2 stops
YOW5:58 pmOttawa
Dec 9
YOW7:00 amOttawa
15h 34m
3 stops
STL9:34 pmLambert-St Louis
$1,098
American Airlines
Dec 7
STL5:29 pmLambert-St Louis
23h 29m
3 stops
YOW5:58 pmOttawa
Dec 9
YOW7:00 amOttawa
15h 34m
3 stops
STL9:34 pmLambert-St Louis
$1,146
American Airlines
Nov 10
STL6:20 pmLambert-St Louis
22h 38m
3 stops
YOW5:58 pmOttawa
Nov 20
YOW7:00 amOttawa
9h 43m
2 stops
STL3:43 pmLambert-St Louis
$1,176

momondo Fare Finder

 
Use the filters below to find and compare flights from St. Louis to Ottawa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisOttawa

STL Lambert-St Louis - YOW Ottawa

STLYOW

Lambert-St Louis

Wed 11/11

6:44 pm-12:01 am

2 stops28h 17m

Ottawa

Wed 11/18

3:05 pm-6:39 pm

2 stops28h 34m

$539

St. LouisOttawa

STL Lambert-St Louis - YOW Ottawa

STLYOW

Lambert-St Louis

Wed 11/11

6:44 pm-5:58 pm

3 stops22h 14m

Ottawa

Wed 11/18

6:55 pm-6:39 pm

2 stops24h 44m

$546

St. LouisOttawa

STL Lambert-St Louis - YOW Ottawa

STLYOW

Lambert-St Louis

Wed 11/11

6:44 pm-5:58 pm

3 stops22h 14m

Ottawa

Wed 11/18

5:40 pm-6:39 pm

3 stops25h 59m

$555

St. LouisOttawa

STL Lambert-St Louis - YOW Ottawa

STLYOW

Lambert-St Louis

Wed 12/9

6:13 pm-4:44 pm

1 stop21h 31m

Ottawa

Fri 12/11

6:55 pm-9:49 am

2 stops15h 54m

$652

St. LouisOttawa

STL Lambert-St Louis - YOW Ottawa

STLYOW

Lambert-St Louis

Wed 11/11

6:44 pm-2:30 pm

2 stops18h 46m

Ottawa

Wed 11/18

7:40 am-2:46 pm

1 stop32h 06m

$656

St. LouisOttawa

STL Lambert-St Louis - YOW Ottawa

STLYOW

Lambert-St Louis

Sun 10/25

4:30 pm-2:45 pm

2 stops21h 15m

Ottawa

Sun 11/1

8:00 am-11:16 pm

1 stop16h 16m

$704

St. LouisOttawa

STL Lambert-St Louis - YOW Ottawa

STLYOW

Lambert-St Louis

Wed 10/28

5:00 pm-1:11 pm

1 stop19h 11m

Ottawa

Sat 10/31

6:00 am-4:59 pm

2 stops11h 59m

$758
Quickest round-trip

St. LouisOttawa

STL Lambert-St Louis - YOW Ottawa

STLYOW

Lambert-St Louis

Fri 3/26

4:05 pm-9:45 pm

1 stop4h 40m

Ottawa

Sun 3/28

10:00 am-3:26 pm

1 stop6h 26m

$759

St. LouisOttawa

STL Lambert-St Louis - YOW Ottawa

STLYOW

Lambert-St Louis

Wed 10/28

7:30 am-9:56 pm

2 stops13h 26m

Ottawa

Sat 10/31

6:00 am-4:59 pm

2 stops11h 59m

$763

St. LouisOttawa

STL Lambert-St Louis - YOW Ottawa

STLYOW

Lambert-St Louis

Wed 10/28

6:09 am-7:27 pm

2 stops12h 18m

Ottawa

Sat 10/31

6:00 am-4:59 pm

2 stops11h 59m

$763

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
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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 month to fly to Ottawa?

In general, January is the cheapest month to fly from St. Louis to Ottawa. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. The month of June is another great option to travel to Ottawa, with average flight prices from St. Louis averaging around $204.

Can stopping save me money on St. Louis to Ottawa flights?

You could potentially save up to 40% on your flight if you consider stops on a St. Louis to Ottawa flight.

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

$161

Fastest flight time

5h 24m

Direct flights

None
The best one-way flight to Ottawa from St. Louis in the past 72 hours is $161. The best round-trip flight deal from St. Louis to Ottawa found on momondo in the last 72 hours is $539.
The fastest flight from St. Louis to Ottawa takes 5h 24m
There are no direct flights from St. Louis to Ottawa. There are no popular flight routes from St. Louis to Ottawa.
Search flight deals

Frequently asked questions about flying from St. Louis to Ottawa

  • 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 5h 24m.

  • 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 $139Free CancellationRating
7.1
11,705 reviews
Search Air Canada flights
United AirlinesPriceFrom $203Free CancellationRating
7.4
10,259 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
Brockville
Pembroke
Petawawa
Calabogie
Prescott
Smiths Falls
Perth
Wakefield

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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