Find cheap flights from Ottawa to St. Louis starting at $205.
Book one-way or return flights from Ottawa to St. Louis from as little as $205. Choose from the popular airlines below and book your flight today!
- One way
- Round-trip
- YOW16:1515h 53m1 stopSTL07:08Mon, May 20|Ottawa - St. Louis|Porter Airlines$205$40449% OFF49% OFF$404$205
- YOW06:0511h 9m1 stopSTL16:14Sat, May 25|Ottawa - St. Louis|United Airlines$283$40430% OFF30% OFF$404$283
- YOW13:389h 59m1 stopSTL22:37Wed, Jul 10|Ottawa - St. Louis|United Airlines$298$40426% OFF26% OFF$404$298
- YOW13:359h 9m1 stopSTL21:44Wed, May 29|Ottawa - St. Louis|United Airlines$301$301
- YOW08:5013h 54m1 stopSTL21:44Mon, May 27|Ottawa - St. Louis|Porter Airlines$303$303
- YOW06:358h 48m1 stopSTL14:23Fri, May 10|Ottawa - St. Louis|United Airlines$308$308
- YOW09:5012h 10m1 stopSTL21:00Sun, May 26|Ottawa - St. Louis|United Airlines$309$309
- YOW06:388h 36m1 stopSTL14:14Tue, Jun 18|Ottawa - St. Louis|United Airlines$309$309
- YOW18:035h 34m1 stopSTL22:37Sat, Jul 13|Ottawa - St. Louis|United Airlines$311$311
- YOW13:359h 9m1 stopSTL21:44Thu, May 23|Ottawa - St. Louis|United Airlines$315$315
- YOW13:003h 5mDirectSTL14:00Fri, May 17|Ottawa - St. Louis|Porter AirlinesFind More FlightsFind More Flights
Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.
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Find more flights and airlines
Discover different routes, airlines, and transfers and find the best alternative flights for your journey from Ottawa to St. Louis.
- CheapestYOW07:5010h 6m2 transferSTL16:56Ottawa Macdonald-Cartier International Airport - St. Louis Lambert International AirportSat, May 25Porter Airlines$182
- YOW07:5010h 6m2 transferSTL16:56Ottawa Macdonald-Cartier International Airport - St. Louis Lambert International AirportSat, May 25Porter Airlines$182Find More Flights
Frequently Asked Questions
How to find a cheap flight from Ottawa to St. Louis
Cheapest nonstop flight price | $205 |
---|---|
Off-season for travel | January |
Peak season for travel | July |
Flight distance | 1,409.41km |
Popular airline | Porter Airlines |
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