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 $849 round trip and CA $465 one way. Prices and availability subject to change. Additional terms may apply.

Thu, Apr 23 - Sun, Apr 26
YOW
Ottawa
STL
St. Louis
CA $849 Roundtrip, found 8 hours ago
CA $849
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Thu, Apr 23 from Ottawa to St. Louis, returning Sun, Apr 26, priced at CA $849 found 8 hours ago
Thu, Apr 23 - Sun, Apr 26
YOW
Ottawa
STL
St. Louis
CA $900 Roundtrip, found 8 hours ago
CA $900
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Thu, Apr 23 from Ottawa to St. Louis, returning Sun, Apr 26, priced at CA $900 found 8 hours ago
Thu, Apr 23 - Sun, Apr 26
YOW
Ottawa
STL
St. Louis
CA $907 Roundtrip, found 8 hours ago
CA $907
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Thu, Apr 23 from Ottawa to St. Louis, returning Sun, Apr 26, priced at CA $907 found 8 hours ago
Thu, Apr 23 - Sun, Apr 26
YOW
Ottawa
STL
St. Louis
CA $934 Roundtrip, found 8 hours ago
CA $934
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Thu, Apr 23 from Ottawa to St. Louis, returning Sun, Apr 26, priced at CA $934 found 8 hours ago
Thu, Apr 23 - Sun, Apr 26
YOW
Ottawa
STL
St. Louis
CA $954 Roundtrip, found 8 hours ago
CA $954
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Thu, Apr 23 from Ottawa to St. Louis, returning Sun, Apr 26, priced at CA $954 found 8 hours ago
Thu, Apr 23 - Sun, Apr 26
YOW
Ottawa
STL
St. Louis
CA $958 Roundtrip, found 8 hours ago
CA $958
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Thu, Apr 23 from Ottawa to St. Louis, returning Sun, Apr 26, priced at CA $958 found 8 hours ago
Thu, Apr 23 - Sun, Apr 26
YOW
Ottawa
STL
St. Louis
CA $965 Roundtrip, found 8 hours ago
CA $965
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Thu, Apr 23 from Ottawa to St. Louis, returning Sun, Apr 26, priced at CA $965 found 8 hours ago
Thu, Apr 23 - Sun, Apr 26
YOW
Ottawa
STL
St. Louis
CA $981 Roundtrip, found 8 hours ago
CA $981
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Thu, Apr 23 from Ottawa to St. Louis, returning Sun, Apr 26, priced at CA $981 found 8 hours ago
Thu, Apr 23 - Sun, Apr 26
YOW
Ottawa
STL
St. Louis
CA $989 Roundtrip, found 8 hours ago
CA $989
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Thu, Apr 23 from Ottawa to St. Louis, returning Sun, Apr 26, priced at CA $989 found 8 hours ago
Thu, Apr 23 - Sun, Apr 26
YOW
Ottawa
STL
St. Louis
CA $991 Roundtrip, found 8 hours ago
CA $991
Roundtrip
found 8 hours ago
Select American Airlines flight, departing Thu, Apr 23 from Ottawa to St. Louis, returning Sun, Apr 26, priced at CA $991 found 8 hours 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.
*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.