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 $431 round trip and CA $300 one way. Prices and availability subject to change. Additional terms may apply.

Wed, Dec 17 - Wed, Dec 24
YOW
Ottawa
STL
St. Louis
CA $431 Roundtrip, found 2 days ago
CA $431
Roundtrip
found 2 days ago
Select Air Canada flight, departing Wed, Dec 17 from Ottawa to St. Louis, returning Wed, Dec 24, priced at CA $431 found 2 days ago
Wed, Dec 17 - Thu, Dec 25
YOW
Ottawa
STL
St. Louis
CA $599 Roundtrip, found 2 days ago
CA $599
Roundtrip
found 2 days ago
Select Air Canada flight, departing Wed, Dec 17 from Ottawa to St. Louis, returning Thu, Dec 25, priced at CA $599 found 2 days ago
Wed, Dec 17 - Tue, Dec 30
YOW
Ottawa
STL
St. Louis
CA $649 Roundtrip, found 2 days ago
CA $649
Roundtrip
found 2 days ago
Select Air Canada flight, departing Wed, Dec 17 from Ottawa to St. Louis, returning Tue, Dec 30, priced at CA $649 found 2 days ago
Tue, Dec 23 - Wed, Dec 24
YOW
Ottawa
STL
St. Louis
CA $707 Roundtrip, found 2 days ago
CA $707
Roundtrip
found 2 days ago
Select Air Canada flight, departing Tue, Dec 23 from Ottawa to St. Louis, returning Wed, Dec 24, priced at CA $707 found 2 days ago
Mon, Dec 22 - Wed, Dec 24
YOW
Ottawa
STL
St. Louis
CA $715 Roundtrip, found 2 days ago
CA $715
Roundtrip
found 2 days ago
Select Air Canada flight, departing Mon, Dec 22 from Ottawa to St. Louis, returning Wed, Dec 24, priced at CA $715 found 2 days ago
Wed, Dec 17 - Mon, Dec 29
YOW
Ottawa
STL
St. Louis
CA $729 Roundtrip, found 2 days ago
CA $729
Roundtrip
found 2 days ago
Select Air Canada flight, departing Wed, Dec 17 from Ottawa to St. Louis, returning Mon, Dec 29, priced at CA $729 found 2 days ago
Wed, Dec 17 - Sun, Dec 28
YOW
Ottawa
STL
St. Louis
CA $759 Roundtrip, found 2 days ago
CA $759
Roundtrip
found 2 days ago
Select Air Canada flight, departing Wed, Dec 17 from Ottawa to St. Louis, returning Sun, Dec 28, priced at CA $759 found 2 days ago
Wed, Dec 17 - Fri, Dec 26
YOW
Ottawa
STL
St. Louis
CA $787 Roundtrip, found 2 days ago
CA $787
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Dec 17 from Ottawa to St. Louis, returning Fri, Dec 26, priced at CA $787 found 2 days ago
Thu, Dec 18 - Thu, Dec 25
YOW
Ottawa
STL
St. Louis
CA $817 Roundtrip, found 2 days ago
CA $817
Roundtrip
found 2 days ago
Select Air Canada flight, departing Thu, Dec 18 from Ottawa to St. Louis, returning Thu, Dec 25, priced at CA $817 found 2 days ago
Wed, Dec 17 - Sat, Dec 27
YOW
Ottawa
STL
St. Louis
CA $841 Roundtrip, found 2 days ago
CA $841
Roundtrip
found 2 days ago
Select Air Canada flight, departing Wed, Dec 17 from Ottawa to St. Louis, returning Sat, Dec 27, priced at CA $841 found 2 days 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.