CA $471 Cheap Air Canada fights from St. Louis (STL) to Ottawa (YOW)

View CA $471 flight on Tue, Sep. 30, 2025Opens in a new window

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • payments icon
    Earn twice
    Earn your airline miles on top of our rewards
    Sign in

Air Canada flights from St. Louis to Ottawa (STL→YOW)

Prices were available within the past 7 days and start at CA $471 for one-way flights and CA $870 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Wed., Sep. 3 - Wed., Sep. 10
STL
St. Louis
YOW
Ottawa
CA $870 Roundtrip, found 5 days ago
CA $870
Roundtrip
found 5 days ago
Select Air Canada flight, departing Wed., Sep. 3 from St. Louis to Ottawa, returning Wed., Sep. 10, priced at CA $870 found 5 days ago
Air Canada
Wed., Sep. 3 - Wed., Sep. 10
STL
St. Louis
YOW
Ottawa
CA $910 Roundtrip, found 5 days ago
CA $910
Roundtrip
found 5 days ago
Select Air Canada flight, departing Wed., Sep. 3 from St. Louis to Ottawa, returning Wed., Sep. 10, priced at CA $910 found 5 days ago
Air Canada
Wed., Sep. 3 - Wed., Sep. 10
STL
St. Louis
YOW
Ottawa
CA $913 Roundtrip, found 5 days ago
CA $913
Roundtrip
found 5 days ago
Select Air Canada flight, departing Wed., Sep. 3 from St. Louis to Ottawa, returning Wed., Sep. 10, priced at CA $913 found 5 days ago
Air Canada
Wed., Sep. 3 - Wed., Sep. 10
STL
St. Louis
YOW
Ottawa
CA $1,017 Roundtrip, found 5 days ago
CA $1,017
Roundtrip
found 5 days ago
Select Air Canada flight, departing Wed., Sep. 3 from St. Louis to Ottawa, returning Wed., Sep. 10, priced at CA $1,017 found 5 days ago
Flight from St. Louis to Ottawa (STL - YOW) route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
Macdonald-Cartier Intl.
Distance
1405 km
*Available to Expedia members.