Find Ottawa to St. Louis flights starting at CAD 279.
Book one-way or return flights from Ottawa to St. Louis from as little as CAD 279. Choose from the popular airlines below and book your flight today!
- One way
- Round-trip
- YOW16:1515h 58m1 stopSTL07:13Mon, May 6|Ottawa - St. Louis|Porter AirlinesCAD 279CAD 60154% OFF54% OFFCAD 601CAD 279
- YOW16:1515h 53m1 stopSTL07:08Mon, May 20|Ottawa - St. Louis|Porter AirlinesCAD 279CAD 60154% OFF54% OFFCAD 601CAD 279
- YOW07:558h 36m1 stopSTL15:31Tue, Apr 30|Ottawa - St. Louis|Porter AirlinesCAD 348CAD 60142% OFF42% OFFCAD 601CAD 348
- YOW17:245h 23m1 stopSTL21:47Tue, May 7|Ottawa - St. Louis|United AirlinesCAD 349CAD 349
- YOW07:558h 36m1 stopSTL15:31Mon, Apr 29|Ottawa - St. Louis|Porter AirlinesCAD 362CAD 362
- YOW06:0511h 9m1 stopSTL16:14Sat, May 25|Ottawa - St. Louis|United AirlinesCAD 384CAD 384
- YOW08:5010h 29m1 stopSTL18:19Wed, May 1|Ottawa - St. Louis|Porter AirlinesCAD 397CAD 397
- YOW13:389h 59m1 stopSTL22:37Wed, Jul 10|Ottawa - St. Louis|United AirlinesCAD 406CAD 406
- YOW08:5010h 18m1 stopSTL18:08Tue, May 7|Ottawa - St. Louis|Porter AirlinesCAD 413CAD 413
- YOW06:358h 48m1 stopSTL14:23Fri, May 10|Ottawa - St. Louis|United AirlinesCAD 419CAD 419
- YOW13:003h 5mDirectSTL14:00Sun, May 5|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 AirlinesCAD 248
- YOW07:5010h 6m2 transferSTL16:56Ottawa Macdonald-Cartier International Airport - St.Louis Lambert International AirportSat, May 25Porter AirlinesCAD 248Find More Flights
How do I find the cheapest flights?
How to find a cheap flight from Ottawa to St. Louis
Cheapest direct flight price | CAD 278 |
---|---|
Cheapest month | November |
Peak season for travel | June |
Flight distance | 1,409.41km |
Popular airline | Porter Airlines |
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