Cheap Flights From Macdonald-Cartier Intl. (YOW) To Lambert-St. Louis Intl. (STL)

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Cheapest Flights from Ottawa (YOW) to St. Louis (STL)

The cheapest flights to Lambert-St. Louis Intl. found within the past 7 days were CA $939 round trip and CA $643 one way. Prices and availability subject to change. Additional terms may apply.

Thu, Feb 26 - Fri, Feb 27
YOW
Ottawa
STL
St. Louis
CA $939 Roundtrip, found 1 day ago
CA $939
Roundtrip
found 1 day ago
Select WestJet flight, departing Thu, Feb 26 from Ottawa to St. Louis, returning Fri, Feb 27, priced at CA $939 found 1 day ago
Thu, Feb 26 - Fri, Feb 27
YOW
Ottawa
STL
St. Louis
CA $990 Roundtrip, found 1 day ago
CA $990
Roundtrip
found 1 day ago
Select WestJet flight, departing Thu, Feb 26 from Ottawa to St. Louis, returning Fri, Feb 27, priced at CA $990 found 1 day ago
Thu, Feb 26 - Fri, Feb 27
YOW
Ottawa
STL
St. Louis
CA $1,024 Roundtrip, found 1 day ago
CA $1,024
Roundtrip
found 1 day ago
Select WestJet flight, departing Thu, Feb 26 from Ottawa to St. Louis, returning Fri, Feb 27, priced at CA $1,024 found 1 day ago
Thu, Feb 26 - Fri, Feb 27
YOW
Ottawa
STL
St. Louis
CA $1,032 Roundtrip, found 1 day ago
CA $1,032
Roundtrip
found 1 day ago
Select Porter Airlines flight, departing Thu, Feb 26 from Ottawa to St. Louis, returning Fri, Feb 27, priced at CA $1,032 found 1 day ago
Thu, Feb 26 - Fri, Feb 27
YOW
Ottawa
STL
St. Louis
CA $1,068 Roundtrip, found 1 day ago
CA $1,068
Roundtrip
found 1 day ago
Select Porter Airlines flight, departing Thu, Feb 26 from Ottawa to St. Louis, returning Fri, Feb 27, priced at CA $1,068 found 1 day ago
Thu, Feb 26 - Fri, Feb 27
YOW
Ottawa
STL
St. Louis
CA $1,082 Roundtrip, found 1 day ago
CA $1,082
Roundtrip
found 1 day ago
Select Porter Airlines flight, departing Thu, Feb 26 from Ottawa to St. Louis, returning Fri, Feb 27, priced at CA $1,082 found 1 day ago
Thu, Feb 26 - Fri, Feb 27
YOW
Ottawa
STL
St. Louis
CA $1,105 Roundtrip, found 1 day ago
CA $1,105
Roundtrip
found 1 day ago
Select Porter Airlines flight, departing Thu, Feb 26 from Ottawa to St. Louis, returning Fri, Feb 27, priced at CA $1,105 found 1 day ago
Fri, Mar 6 - Tue, Mar 10
YOW
Ottawa
STL
St. Louis
CA $1,109 Roundtrip, found 1 day ago
CA $1,109
Roundtrip
found 1 day ago
Select WestJet flight, departing Fri, Mar 6 from Ottawa to St. Louis, returning Tue, Mar 10, priced at CA $1,109 found 1 day ago
Thu, Feb 26 - Fri, Feb 27
YOW
Ottawa
STL
St. Louis
CA $1,116 Roundtrip, found 1 day ago
CA $1,116
Roundtrip
found 1 day ago
Select Porter Airlines flight, departing Thu, Feb 26 from Ottawa to St. Louis, returning Fri, Feb 27, priced at CA $1,116 found 1 day ago
Thu, Feb 26 - Fri, Feb 27
YOW
Ottawa
STL
St. Louis
CA $1,119 Roundtrip, found 1 day ago
CA $1,119
Roundtrip
found 1 day ago
Select Porter Airlines flight, departing Thu, Feb 26 from Ottawa to St. Louis, returning Fri, Feb 27, priced at CA $1,119 found 1 day ago

Frequently asked questions

What airlines fly from Ottawa Intl. Airport to STL?
Unfortunately, you won't find any airlines that fly straight from Macdonald-Cartier Intl. Airport (YOW) to St. Louis Lambert International Airport. But don't let that small detail stop you. Use any layover as an opportunity to check out the local fare, stretch your legs and potentially discover a new city to explore further one day.
What is the best day to buy a plane ticket?
Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you're looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you're browsing flight deals.
What are the cheapest days to fly?
Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.
How far in advance can you book a flight?
Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.

Popular Flight Routes from Ottawa (YOW)

Travelers at YOW love to visit these top cities. Roam to the top destinations from Ottawa (YOW) today with the cheap prices from Travelocity!

Popular Flight Routes from St. Louis (STL)

Travelers at STL love to visit these top cities. Roam to the top destinations from St. Louis(STL) today with the cheap prices from Travelocity!

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.