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Cheap flights from Ottawa to St. Louis from $260

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ottawa to St. Louis departing on 12/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ottawa to St. Louis

Cheap round-trip flights

These are some of the best round-trip flight deals from Ottawa to St. Louis that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Ottawa to St. Louis.

Cheap last minute flights

Planning a quick getaway from Ottawa to St. Louis? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to St. Louis, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Ottawa to St. Louis

Find recent round-trip train or bus tickets from Ottawa to St. Louis.

All round-trip flight deals to St. Louis

The cheapest plane tickets to St. Louis found on KAYAK recently.
4:10 pm - 11:58 pmYOW-STL
8h 48m1 stop
8:12 am - 8:17 pmSTL-YOW
11h 05m1 stop
Sun, Jan 5 - Sun, Jan 12
6:00 am - 2:14 pmYOW-STL
9h 14m2 stops
11:30 am - 10:01 pmSTL-YOW
9h 31m2 stops
$614United Airlines
Find Deal
Tue, Jan 14 - Mon, Jan 20
5:30 am - 5:51 pmYOW-STL
13h 21m2 stops
9:44 am - 10:01 pmSTL-YOW
11h 17m2 stops
$620United Airlines
Find Deal
Sun, Jan 5 - Sun, Jan 12
11:25 am - 9:36 pmYOW-STL
11h 11m1 stop
8:00 am - 10:01 pmSTL-YOW
13h 01m2 stops
$652United Airlines
Find Deal
Wed, Dec 18 - Wed, Dec 25
6:00 am - 3:34 pmYOW-STL
10h 34m2 stops
8:00 am - 9:37 pmSTL-YOW
12h 37m2 stops
$656United Airlines
Find Deal
Wed, Dec 18 - Wed, Dec 25
9:20 am - 11:28 pmYOW-STL
15h 08m1 stop
Tue, Dec 31
7:45 am - 3:21 pmYOW-STL
32h 36m2 stops
Mon, Dec 30
6:00 am - 3:37 pmYOW-STL
10h 37m2 stops
$334United Airlines
Find Deal
Sat, Jan 4
9:20 am - 12:10 pmYOW-STL
27h 50m3 stops
Tue, Dec 31
10:00 am - 11:45 amYOW-STL
26h 45m3 stops
Sat, Jan 4
9:35 pm - 4:12 pmYOW-STL
19h 37m2 stops
$441WestJet
Find Deal
Mon, Dec 30
4:05 pm - 11:40 pmYOW-STL
8h 35m1 stop
Mon, Dec 30

United Airlines flights from Ottawa to St. Louis

Our best United Airlines deals on Ottawa to St. Louis flight tickets
United Airlines
Jan 14
YOW6:00 amOttawa
9h 14m
2 stops
STL2:14 pmLambert-St Louis
Jan 20
STL11:30 amLambert-St Louis
9h 31m
2 stops
YOW10:01 pmOttawa
United Airlines
Jan 5
YOW5:30 amOttawa
13h 21m
2 stops
STL5:51 pmLambert-St Louis
Jan 12
STL9:44 amLambert-St Louis
11h 17m
2 stops
YOW10:01 pmOttawa
United Airlines
Dec 18
YOW11:25 amOttawa
11h 11m
1 stop
STL9:36 pmLambert-St Louis
Dec 25
STL8:00 amLambert-St Louis
13h 01m
2 stops
YOW10:01 pmOttawa

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 from Ottawa to St. Louis?

December. The cheapest time of year to fly to St. Louis from Ottawa is December. Most expensive is January

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 Monday

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 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

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

You could potentially save up to 2% on your flight if you consider stops on a Ottawa to St. Louis flight.

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

$260

Fastest flight time

8h 35m

Direct flights

None

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Ottawa in the past 72 hours is $260. The best round-trip flight deal from Ottawa to St. Louis found on momondo in the last 72 hours is $554.
The fastest flight from Ottawa to St. Louis takes 8h 35m
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 far is Ottawa to Lambert-St Louis by plane?

    The straight-line distance from Ottawa to Lambert-St Louis is 877.2 mi. By plane, this route typically takes 8h 48m.

  • 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?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for 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
Air CanadaPriceFrom $550Free CancellationRating
7.0
8,238 reviews
Search Air Canada flights
United AirlinesPriceFrom $575Free CancellationRating
7.4
9,172 reviews
Search United Airlines flights

Why use momondo?

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

Finding the right flight to St. Louis from Ottawa is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.

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

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

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?

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from Ottawa and alert you when they change.


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