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Cheap flights from Ottawa to St. Louis from C$ 405

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
4:00 p.m. - 6:57 p.m.YOW  Ottawa-STL Lambert-St Louis
27h 57m3 stops Toronto Pearson Intl Las Vegas Harry Reid Intl Denver Intl
Multiple Airlines Logo
7:59 p.m. - 1:01 a.m.STL  Lambert-St Louis-YOW Ottawa
28h 02m3 stops Denver Intl Phoenix Sky Harbor Intl Calgary
C$ 786Multiple Airlines
Fri, 23 Oct - Sat, 31 Oct
Air Canada Logo
10:05 a.m. - 3:23 p.m.YOW  Ottawa-STL Lambert-St Louis
6h 18m1 stop Toronto Pearson Intl
Air Canada Logo
4:05 p.m. - 11:55 p.m.STL  Lambert-St Louis-YOW Ottawa
6h 50m1 stop Toronto Pearson Intl
C$ 813Air Canada
Sun, 1 Nov - Sun, 8 Nov
United Airlines Logo
3:10 p.m. - 9:09 p.m.YOW  Ottawa-STL Lambert-St Louis
6h 59m1 stop Newark
United Airlines Logo
9:04 a.m. - 9:35 p.m.STL  Lambert-St Louis-YOW Ottawa
11h 31m1 stop Chicago O'Hare Intl
C$ 827United Airlines
Thu, 15 Oct - Sun, 18 Oct
United Airlines Logo
6:00 a.m. - 2:17 p.m.YOW  Ottawa-STL Lambert-St Louis
9h 17m2 stops Washington, D.C. Dulles Intl Chicago O'Hare Intl
United Airlines Logo
6:00 a.m. - 5:16 p.m.STL  Lambert-St Louis-YOW Ottawa
10h 16m1 stop Chicago O'Hare Intl
C$ 827United Airlines
Thu, 15 Oct - Sun, 18 Oct
United Airlines Logo
5:20 p.m. - 9:21 p.m.YOW  Ottawa-STL Lambert-St Louis
5h 01m1 stop Chicago O'Hare Intl
United Airlines Logo
7:30 a.m. - 4:38 p.m.STL  Lambert-St Louis-YOW Ottawa
8h 08m1 stop Newark
C$ 827United Airlines
Thu, 15 Oct - Mon, 19 Oct
Air Canada Logo
2:50 p.m. - 6:41 p.m.YOW  Ottawa-STL Lambert-St Louis
4h 51m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
2:40 p.m. - 9:20 p.m.STL  Lambert-St Louis-YOW Ottawa
5h 40m1 stop Toronto Pearson Intl
C$ 837Air Canada
Thu, 15 Oct - Mon, 19 Oct
Air Canada Logo
2:50 p.m. - 6:41 p.m.YOW  Ottawa-STL Lambert-St Louis
4h 51m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
4:05 p.m. - 11:55 p.m.STL  Lambert-St Louis-YOW Ottawa
6h 50m1 stop Toronto Pearson Intl
C$ 847Air Canada
Fri, 16 Oct - Mon, 26 Oct
American Airlines Logo
7:00 a.m. - 8:57 p.m.YOW  Ottawa-STL Lambert-St Louis
14h 57m2 stops Toronto Pearson Intl Chicago O'Hare Intl
American Airlines Logo
11:31 a.m. - 5:58 p.m.STL  Lambert-St Louis-YOW Ottawa
29h 27m2 stops Chicago O'Hare Intl Toronto Pearson Intl
C$ 884American Airlines
Fri, 16 Oct - Mon, 26 Oct
American Airlines Logo
7:00 a.m. - 8:57 p.m.YOW  Ottawa-STL Lambert-St Louis
14h 57m2 stops Toronto Pearson Intl Chicago O'Hare Intl
American Airlines Logo
11:31 a.m. - 5:58 p.m.STL  Lambert-St Louis-YOW Ottawa
29h 27m2 stops Chicago O'Hare Intl Toronto Pearson Intl
C$ 903American Airlines
Fri, 16 Oct - Mon, 26 Oct
Multiple Airlines Logo
8:00 a.m. - 5:40 p.m.YOW  Ottawa-STL Lambert-St Louis
10h 40m2 stops Orlando Atlanta Hartsfield-Jackson
Multiple Airlines Logo
7:59 p.m. - 1:01 a.m.STL  Lambert-St Louis-YOW Ottawa
28h 02m3 stops Denver Intl Phoenix Sky Harbor Intl Calgary
C$ 928Multiple Airlines
Fri, 30 Oct - Sat, 31 Oct

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Air Canada flights from Ottawa to St. Louis

Our best Air Canada deals on Ottawa to St. Louis flight tickets
Air Canada
1 Nov
YOW10:05 a.m.Ottawa
6h 18m
1 stop
STL3:23 p.m.Lambert-St Louis
8 Nov
STL4:05 p.m.Lambert-St Louis
6h 50m
1 stop
YOW11:55 p.m.Ottawa
C$ 813
Air Canada
15 Oct
YOW2:50 p.m.Ottawa
4h 51m
1 stop
STL6:41 p.m.Lambert-St Louis
19 Oct
STL2:40 p.m.Lambert-St Louis
5h 40m
1 stop
YOW9:20 p.m.Ottawa
C$ 837
Air Canada
16 Oct
YOW2:50 p.m.Ottawa
4h 51m
1 stop
STL6:41 p.m.Lambert-St Louis
26 Oct
STL4:05 p.m.Lambert-St Louis
6h 50m
1 stop
YOW11:55 p.m.Ottawa
C$ 847

American Airlines flights from Ottawa to St. Louis

Our best American Airlines deals on Ottawa to St. Louis flight tickets
American Airlines
16 Oct
YOW7:00 a.m.Ottawa
14h 57m
2 stops
STL8:57 p.m.Lambert-St Louis
26 Oct
STL11:31 a.m.Lambert-St Louis
29h 27m
2 stops
YOW5:58 p.m.Ottawa
C$ 884
American Airlines
16 Oct
YOW7:00 a.m.Ottawa
14h 57m
2 stops
STL8:57 p.m.Lambert-St Louis
26 Oct
STL11:31 a.m.Lambert-St Louis
29h 27m
2 stops
YOW5:58 p.m.Ottawa
C$ 903
American Airlines
16 Oct
YOW7:00 a.m.Ottawa
14h 57m
2 stops
STL8:57 p.m.Lambert-St Louis
26 Oct
STL6:10 p.m.Lambert-St Louis
22h 48m
3 stops
YOW5:58 p.m.Ottawa
C$ 1,205

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

Fri 23/10

4:00 p.m.-6:57 p.m.

3 stops27h 57m

Lambert-St Louis

Sat 31/10

7:59 p.m.-1:01 a.m.

3 stops28h 02m

C$ 786

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Sun 1/11

10:05 a.m.-3:23 p.m.

1 stop6h 18m

Lambert-St Louis

Sun 8/11

4:05 p.m.-11:55 p.m.

1 stop6h 50m

C$ 813

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Thu 15/10

3:10 p.m.-9:09 p.m.

1 stop6h 59m

Lambert-St Louis

Sun 18/10

9:04 a.m.-9:35 p.m.

1 stop11h 31m

C$ 827

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Thu 15/10

6:00 a.m.-2:17 p.m.

2 stops9h 17m

Lambert-St Louis

Sun 18/10

6:00 a.m.-5:16 p.m.

1 stop10h 16m

C$ 827

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Thu 15/10

5:20 p.m.-9:21 p.m.

1 stop5h 01m

Lambert-St Louis

Mon 19/10

7:30 a.m.-4:38 p.m.

1 stop8h 08m

C$ 827
Quickest round-trip

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Thu 15/10

2:50 p.m.-6:41 p.m.

1 stop4h 51m

Lambert-St Louis

Mon 19/10

2:40 p.m.-9:20 p.m.

1 stop5h 40m

C$ 837

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Fri 16/10

2:50 p.m.-6:41 p.m.

1 stop4h 51m

Lambert-St Louis

Mon 26/10

4:05 p.m.-11:55 p.m.

1 stop6h 50m

C$ 847

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Fri 16/10

7:00 a.m.-8:57 p.m.

2 stops14h 57m

Lambert-St Louis

Mon 26/10

11:31 a.m.-5:58 p.m.

2 stops29h 27m

C$ 884

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Fri 16/10

7:00 a.m.-8:57 p.m.

2 stops14h 57m

Lambert-St Louis

Mon 26/10

11:31 a.m.-5:58 p.m.

2 stops29h 27m

C$ 903

OttawaSt. Louis

YOW Ottawa - STL Lambert-St Louis

YOWSTL

Ottawa

Fri 30/10

8:00 a.m.-5:40 p.m.

2 stops10h 40m

Lambert-St Louis

Sat 31/10

7:59 p.m.-1:01 a.m.

3 stops28h 02m

C$ 928

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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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 February is, on average, the cheapest month to fly to St. Louis from Ottawa, with most prices found around C$ 0. If you don’t want to visit St. Louis in February, then you should wait until May to fly from Ottawa, when ticket prices are also cheap, with an average price of C$ 412.

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$ 405

Fastest flight time

6h 59m

Direct flights

None
The best one-way flight to St. Louis from Ottawa in the past 72 hours is C$ 405. The best round-trip flight deal from Ottawa to St. Louis found on momondo in the last 72 hours is C$ 786.
The fastest flight from Ottawa to St. Louis takes 6h 59m
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. 6h 59m 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$ 404Free CancellationRating
7.4
10,222 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 412Free CancellationRating
7.1
11,662 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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Yes momondo offers price alerts on flights to St. Louis from Ottawa. 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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