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Cheap flights from Ottawa to St. Louis from C$ 524

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ottawa to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:00 a.m. - 12:04 a.m.YOW  Ottawa-STL Lambert-St Louis
17h 04m1 stop Orlando
Multiple Airlines Logo
5:59 p.m. - 11:40 p.m.STL  Lambert-St Louis-YOW Ottawa
28h 41m2 stops Las Vegas Harry Reid Intl Calgary
C$ 858Multiple Airlines
Mon, 1 Feb - Sat, 13 Feb
United Airlines Logo
6:00 a.m. - 10:15 p.m.YOW  Ottawa-STL Lambert-St Louis
17h 15m1 stop Newark
United Airlines Logo
6:30 a.m. - 9:56 p.m.STL  Lambert-St Louis-YOW Ottawa
14h 26m2 stops Chicago O'Hare Intl Newark
C$ 929United Airlines
Tue, 8 Dec - Wed, 9 Dec
United Airlines Logo
6:00 a.m. - 10:15 p.m.YOW  Ottawa-STL Lambert-St Louis
17h 15m1 stop Newark
United Airlines Logo
11:00 a.m. - 9:56 p.m.STL  Lambert-St Louis-YOW Ottawa
9h 56m1 stop Newark
C$ 929United Airlines
Tue, 8 Dec - Wed, 9 Dec
United Airlines Logo
6:00 a.m. - 10:15 p.m.YOW  Ottawa-STL Lambert-St Louis
17h 15m1 stop Newark
United Airlines Logo
6:30 a.m. - 9:56 p.m.STL  Lambert-St Louis-YOW Ottawa
14h 26m2 stops Chicago O'Hare Intl Newark
C$ 931United Airlines
Tue, 8 Dec - Wed, 9 Dec
Delta Logo
5:30 a.m. - 3:47 p.m.YOW  Ottawa-STL Lambert-St Louis
11h 17m2 stops Toronto Pearson Intl Detroit Metropolitan Wayne County
Delta Logo
10:20 a.m. - 11:40 p.m.STL  Lambert-St Louis-YOW Ottawa
12h 20m2 stops Detroit Metropolitan Wayne County Toronto Pearson Intl
C$ 1,105Delta
Sat, 21 Nov - Sat, 28 Nov
Multiple Airlines Logo
12:10 p.m. - 11:24 p.m.YOW  Ottawa-STL Lambert-St Louis
12h 14m2 stops Toronto Pearson Intl Chicago O'Hare Intl
Multiple Airlines Logo
9:40 a.m. - 7:52 p.m.STL  Lambert-St Louis-YOW Ottawa
9h 12m2 stops Chicago O'Hare Intl Toronto Island
C$ 1,133Multiple Airlines
Sun, 29 Nov - Sun, 6 Dec
Multiple Airlines Logo
5:30 a.m. - 7:54 a.m.YOW  Ottawa-STL Lambert-St Louis
27h 24m3 stops Toronto Pearson Intl Fort Lauderdale Dallas/Fort Worth
Multiple Airlines Logo
5:15 p.m. - 11:40 p.m.STL  Lambert-St Louis-YOW Ottawa
29h 25m3 stops Las Vegas Harry Reid Intl Phoenix Sky Harbor Intl Calgary
C$ 1,144Multiple Airlines
Sat, 21 Nov - Sat, 28 Nov
Air Canada Logo
10:00 a.m. - 3:26 p.m.YOW  Ottawa-STL Lambert-St Louis
6h 26m1 stop Toronto Pearson Intl
Air Canada Logo
8:30 a.m. - 2:09 p.m.STL  Lambert-St Louis-YOW Ottawa
4h 39m1 stop Chicago O'Hare Intl
C$ 1,163Air Canada
Sat, 21 Nov - Sat, 28 Nov
Air Canada Logo
10:00 a.m. - 3:26 p.m.YOW  Ottawa-STL Lambert-St Louis
6h 26m1 stop Toronto Pearson Intl
Air Canada Logo
7:30 a.m. - 7:52 p.m.STL  Lambert-St Louis-YOW Ottawa
11h 22m2 stops Chicago O'Hare Intl Toronto Island
C$ 1,170Air Canada
Sat, 21 Nov - Sat, 28 Nov
Air Canada Logo
10:00 a.m. - 3:26 p.m.YOW  Ottawa-STL Lambert-St Louis
6h 26m1 stop Toronto Pearson Intl
Air Canada Logo
7:30 a.m. - 7:52 p.m.STL  Lambert-St Louis-YOW Ottawa
11h 22m2 stops Chicago O'Hare Intl Toronto Island
C$ 1,181Air Canada
Sat, 21 Nov - Sat, 28 Nov

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United Airlines flights from Ottawa to St. Louis

Our best United Airlines deals on Ottawa to St. Louis flight tickets
United Airlines
8 Dec
YOW6:00 a.m.Ottawa
17h 15m
1 stop
STL10:15 p.m.Lambert-St Louis
9 Dec
STL11:00 a.m.Lambert-St Louis
9h 56m
1 stop
YOW9:56 p.m.Ottawa
C$ 929
United Airlines
8 Dec
YOW6:00 a.m.Ottawa
17h 15m
1 stop
STL10:15 p.m.Lambert-St Louis
9 Dec
STL6:30 a.m.Lambert-St Louis
14h 26m
2 stops
YOW9:56 p.m.Ottawa
C$ 931
United Airlines
8 Dec
YOW9:45 a.m.Ottawa
10h 41m
2 stops
STL7:26 p.m.Lambert-St Louis
11 Dec
STL6:30 a.m.Lambert-St Louis
7h 37m
2 stops
YOW3:07 p.m.Ottawa
C$ 963

Delta flights from Ottawa to St. Louis

Our best Delta deals on Ottawa to St. Louis flight tickets
Delta
21 Nov
YOW5:30 a.m.Ottawa
11h 17m
2 stops
STL3:47 p.m.Lambert-St Louis
28 Nov
STL10:20 a.m.Lambert-St Louis
12h 20m
2 stops
YOW11:40 p.m.Ottawa
C$ 1,105
Delta
21 Nov
YOW5:30 a.m.Ottawa
11h 17m
2 stops
STL3:47 p.m.Lambert-St Louis
28 Nov
STL10:20 a.m.Lambert-St Louis
12h 20m
2 stops
YOW11:40 p.m.Ottawa
C$ 1,256
Delta
21 Nov
YOW5:30 a.m.Ottawa
11h 17m
2 stops
STL3:47 p.m.Lambert-St Louis
28 Nov
STL10:20 a.m.Lambert-St Louis
12h 20m
2 stops
YOW11:40 p.m.Ottawa
C$ 1,364

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Mon 1/2

8:00 a.m.-12:04 a.m.

1 stop17h 04m

Lambert-St Louis

Sat 13/2

5:59 p.m.-11:40 p.m.

2 stops28h 41m

C$ 858

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Tue 8/12

6:00 a.m.-10:15 p.m.

1 stop17h 15m

Lambert-St Louis

Wed 9/12

6:30 a.m.-9:56 p.m.

2 stops14h 26m

C$ 929

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Tue 8/12

6:00 a.m.-10:15 p.m.

1 stop17h 15m

Lambert-St Louis

Wed 9/12

11:00 a.m.-9:56 p.m.

1 stop9h 56m

C$ 929

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Tue 8/12

6:00 a.m.-10:15 p.m.

1 stop17h 15m

Lambert-St Louis

Wed 9/12

6:30 a.m.-9:56 p.m.

2 stops14h 26m

C$ 931

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Sat 21/11

5:30 a.m.-3:47 p.m.

2 stops11h 17m

Lambert-St Louis

Sat 28/11

10:20 a.m.-11:40 p.m.

2 stops12h 20m

C$ 1,105

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Sun 29/11

12:10 p.m.-11:24 p.m.

2 stops12h 14m

Lambert-St Louis

Sun 6/12

9:40 a.m.-7:52 p.m.

2 stops9h 12m

C$ 1,133

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Sat 21/11

5:30 a.m.-7:54 a.m.

3 stops27h 24m

Lambert-St Louis

Sat 28/11

5:15 p.m.-11:40 p.m.

3 stops29h 25m

C$ 1,144
Quickest round-trip

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Sat 21/11

10:00 a.m.-3:26 p.m.

1 stop6h 26m

Lambert-St Louis

Sat 28/11

8:30 a.m.-2:09 p.m.

1 stop4h 39m

C$ 1,163

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Sat 21/11

10:00 a.m.-3:26 p.m.

1 stop6h 26m

Lambert-St Louis

Sat 28/11

7:30 a.m.-7:52 p.m.

2 stops11h 22m

C$ 1,170

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Sat 21/11

10:00 a.m.-3:26 p.m.

1 stop6h 26m

Lambert-St Louis

Sat 28/11

7:30 a.m.-7:52 p.m.

2 stops11h 22m

C$ 1,181

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
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See travel insights to St. Louis from

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

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 St. Louis?

The month of May is, on average, the cheapest month to fly to St. Louis from Ottawa, with most prices found around C$ 411. If you don’t want to visit St. Louis in May, then you should wait until September to fly from Ottawa, when ticket prices are also cheap, with an average price of C$ 492.

When to book flights from Ottawa to St. Louis

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

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

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

Best price found

C$ 524

Fastest flight time

7h 38m

Direct flights

None
The best one-way flight to St. Louis from Ottawa in the past 72 hours is C$ 524. The best round-trip flight deal from Ottawa to St. Louis found on momondo in the last 72 hours is C$ 858.
The fastest flight from Ottawa to St. Louis takes 7h 38m
There are no direct flights from Ottawa to St. Louis. There are no popular flight routes from Ottawa to St. Louis.
Search flight deals

Frequently asked questions about flying from Ottawa to St. Louis

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

    A flight from Ottawa to Lambert-St Louis will travel around 1411.6 km. 7h 38m is a normal flight duration for this route.

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

    Prices for flights from Ottawa Airport to Lambert-St Louis Airport are refreshed on a daily basis.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ottawa Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from Ottawa to St. Louis

Compare and see reviews for airlines that fly from Ottawa to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom C$ 402Free CancellationRating
7.3
10,465 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 411Free CancellationRating
7.1
11,863 reviews
Search Air Canada flights

Travelling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles

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

All flight searches from Ottawa to St. Louis on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ottawa to St. Louis.

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