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 $959 round trip and CA $507 one way. Prices and availability subject to change. Additional terms may apply.

Wed, Nov 12 - Sun, Nov 23
YOW
Ottawa
STL
St. Louis
CA $959 Roundtrip, found 2 days ago
CA $959
Roundtrip
found 2 days ago
Select Porter Airlines flight, departing Wed, Nov 12 from Ottawa to St. Louis, returning Sun, Nov 23, priced at CA $959 found 2 days ago
Tue, Oct 14 - Sat, Oct 18
YOW
Ottawa
STL
St. Louis
CA $972 Roundtrip, found 6 days ago
CA $972
Roundtrip
found 6 days ago
Select Porter Airlines flight, departing Tue, Oct 14 from Ottawa to St. Louis, returning Sat, Oct 18, priced at CA $972 found 6 days ago
Tue, Oct 14 - Sat, Oct 18
YOW
Ottawa
STL
St. Louis
CA $985 Roundtrip, found 6 days ago
CA $985
Roundtrip
found 6 days ago
Select WestJet flight, departing Tue, Oct 14 from Ottawa to St. Louis, returning Sat, Oct 18, priced at CA $985 found 6 days ago
Tue, Oct 14 - Sat, Oct 18
YOW
Ottawa
STL
St. Louis
CA $988 Roundtrip, found 6 days ago
CA $988
Roundtrip
found 6 days ago
Select Porter Airlines flight, departing Tue, Oct 14 from Ottawa to St. Louis, returning Sat, Oct 18, priced at CA $988 found 6 days ago
Tue, Oct 14 - Sat, Oct 18
YOW
Ottawa
STL
St. Louis
CA $991 Roundtrip, found 6 days ago
CA $991
Roundtrip
found 6 days ago
Select Porter Airlines flight, departing Tue, Oct 14 from Ottawa to St. Louis, returning Sat, Oct 18, priced at CA $991 found 6 days ago
Tue, Oct 14 - Thu, Oct 23
YOW
Ottawa
STL
St. Louis
CA $1,002 Roundtrip, found 6 days ago
CA $1,002
Roundtrip
found 6 days ago
Select Porter Airlines flight, departing Tue, Oct 14 from Ottawa to St. Louis, returning Thu, Oct 23, priced at CA $1,002 found 6 days ago
Tue, Oct 14 - Sat, Oct 18
YOW
Ottawa
STL
St. Louis
CA $1,004 Roundtrip, found 6 days ago
CA $1,004
Roundtrip
found 6 days ago
Select WestJet flight, departing Tue, Oct 14 from Ottawa to St. Louis, returning Sat, Oct 18, priced at CA $1,004 found 6 days ago
Tue, Oct 14 - Sat, Oct 18
YOW
Ottawa
STL
St. Louis
CA $1,006 Roundtrip, found 6 days ago
CA $1,006
Roundtrip
found 6 days ago
Select Porter Airlines flight, departing Tue, Oct 14 from Ottawa to St. Louis, returning Sat, Oct 18, priced at CA $1,006 found 6 days ago
Wed, Nov 12 - Sun, Nov 23
YOW
Ottawa
STL
St. Louis
CA $1,009 Roundtrip, found 2 days ago
CA $1,009
Roundtrip
found 2 days ago
Select Porter Airlines flight, departing Wed, Nov 12 from Ottawa to St. Louis, returning Sun, Nov 23, priced at CA $1,009 found 2 days ago
Tue, Oct 14 - Thu, Oct 23
YOW
Ottawa
STL
St. Louis
CA $1,017 Roundtrip, found 6 days ago
CA $1,017
Roundtrip
found 6 days ago
Select Porter Airlines flight, departing Tue, Oct 14 from Ottawa to St. Louis, returning Thu, Oct 23, priced at CA $1,017 found 6 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.