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Cheap flights from Ottawa to St. Louis from C$ 530

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Ottawa to St. Louis departing on 8/4. 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
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Wed 10/4

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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$ 530

Fastest flight time

5h 20m

Direct flights

None

Airports in St. Louis

1 airport
The best flight deal from Ottawa to St. Louis found on momondo in the last 72 hours is C$ 530
The fastest flight from Ottawa to St. Louis takes 5h 20m
There are no direct flights from Ottawa to St. Louis. Popular non-direct route for this connection is Ottawa Airport - Lambert-St Louis Airport.
There is 1 airport near St. Louis: Lambert-St Louis (STL)

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 from Ottawa to St. Louis?

March. The cheapest time of year to fly to St. Louis from Ottawa is March. The most expensive is May.

What is the cheapest day to depart Ottawa for St. Louis?

Thursday. The cheapest day of the week is typically Thursday. The most expensive is typically Saturday

When is the cheapest time to fly from Ottawa to St. Louis?

Ottawa to St. Louis flights are currently only available in the morning

What is the cheapest airline that flies to St. Louis from Ottawa?

Air Canada. Air Canada is the most popular carrier operating from Ottawa to St. Louis

What is the cheapest Ottawa to St. Louis flight route?

Ottawa - Lambert-St Louis. Fly from Ottawa to Lambert-St Louis for the best Ottawa - St. Louis flight prices

How far in advance should you book Ottawa to St. Louis flights?

37 days before. The cheapest time to buy a flight from Ottawa to St. Louis is approximately 37 days to departure

If you are looking to fly from Ottawa to St. Louis, you are most likely going to fly from Ottawa Airport to Lambert-St Louis Airport, the most popular airports on that route. If you are looking for an alternate airport near Ottawa Airport, Montreal Pierre Elliott Trudeau Intl Airport is a great option and is located in Montreal. The least expensive flight option from Ottawa to St. Louis will typically be YOW — STL during the month of March with an average price of C$ 530 RT.

Montreal Pierre Elliott Trudeau Intl Airport (YUL) to Lambert-St Louis Airport (STL)C$ 562
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Ottawa Airport (YOW) to Lambert-St Louis Airport (STL)C$ 530
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Easily compare round-trip flights from Ottawa to St. Louis

Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Ottawa to St. Louis by changing tabs
Multiple Airlines
8 Apr.
YOW5:30 p.m.Ottawa
21h 10m
1 stop
STL1:40 p.m.Lambert-St Louis
11 Apr.
STL7:30 p.m.Lambert-St Louis
23h 04m
2 stops
YOW7:34 p.m.Ottawa
United Airlines
15 Apr.
YOW5:55 p.m.Ottawa
5h 20m
1 stop
STL10:15 p.m.Lambert-St Louis
16 Apr.
STL8:27 a.m.Lambert-St Louis
14h 22m
1 stop
YOW11:49 p.m.Ottawa
Air Canada
15 Apr.
YOW5:30 a.m.Ottawa
11h 16m
2 stops
STL3:46 p.m.Lambert-St Louis
16 Apr.
STL11:10 a.m.Lambert-St Louis
6h 45m
2 stops
YOW6:55 p.m.Ottawa
Multiple Airlines
8 Apr.
YOW5:30 p.m.Ottawa
21h 10m
1 stop
STL1:40 p.m.Lambert-St Louis
11 Apr.
STL6:24 p.m.Lambert-St Louis
24h 10m
1 stop
YOW7:34 p.m.Ottawa
WestJet
20 Apr.
YOW6:00 a.m.Ottawa
13h 20m
2 stops
STL6:20 p.m.Lambert-St Louis
23 May
STL12:53 p.m.Lambert-St Louis
17h 06m
2 stops
YOW6:59 a.m.Ottawa
C$ 1,332
Find similar
Multiple Airlines
8 Apr.
YOW7:55 a.m.Ottawa
30h 45m
3 stops
STL1:40 p.m.Lambert-St Louis
11 Apr.
STL7:30 p.m.Lambert-St Louis
23h 04m
2 stops
YOW7:34 p.m.Ottawa

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
Air CanadaPriceFrom C$ 625Free CancellationRating
7.0
6,744 reviews
Search Air Canada flights

United Airlines flights from Ottawa to St. Louis

Our best United Airlines deals on Ottawa to St. Louis flight tickets
United Airlines
15 Apr.
YOW5:55 p.m.Ottawa
5h 20m
1 stop
STL10:15 p.m.Lambert-St Louis
16 Apr.
STL8:27 a.m.Lambert-St Louis
14h 22m
1 stop
YOW11:49 p.m.Ottawa
United Airlines
20 Apr.
YOW2:47 p.m.Ottawa
8h 02m
2 stops
STL9:49 p.m.Lambert-St Louis
23 May
STL6:30 a.m.Lambert-St Louis
9h 34m
1 stop
YOW5:04 p.m.Ottawa

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

    A flight from Ottawa to Lambert-St Louis will travel around 1411.6 km. 5h 20m 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.


Alternative routes for Ottawa to St. Louis

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Toronto to St. Louis Flights
Fastest flight time2h 06m
Cheapest priceC$ 547
Toronto to Kansas City Flights
Fastest flight time2h 30m
Cheapest priceC$ 510
Toronto to Springfield Flights
Fastest flight time7h 08m
Cheapest priceC$ 742
Ottawa to Kansas City Flights
Fastest flight time9h 29m
Cheapest priceC$ 710
Toronto to Columbia, Missouri Flights
Fastest flight time8h 58m
Cheapest priceC$ 742

Similar Ottawa to St. Louis flights

Flexible with your destination? Broaden your search and find flights similar to your Ottawa to St. Louis route

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ottawa to St. Louis for you.

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.

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

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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1 adult
Wed 3/4
Wed 10/4
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