Find cheap flights from St. Louis to Ottawa starting at €156.
Book one-way or return flights from St. Louis to Ottawa from as little as €156. Choose from the popular airlines below and book your flight today!
- One way
- Round-trip
- STL08:168h 11m1 stopYOW17:27Wed, Jun 12|St. Louis - Ottawa|Frontier Airlines€156€29848% OFF48% OFF€298€156
- STL19:4420h 43m1 stopYOW17:27Fri, Jun 14|St. Louis - Ottawa|Frontier Airlines€213€29828% OFF28% OFF€298€213
- STL06:086h 44m1 stopYOW13:52Sat, Jun 22|St. Louis - Ottawa|United Airlines€234€29822% OFF22% OFF€298€234
- STL06:0815h 9m1 stopYOW22:17Sun, Jun 23|St. Louis - Ottawa|United Airlines€238€238
- STL06:085h 37m1 stopYOW12:45Mon, Jun 17|St. Louis - Ottawa|United Airlines€239€239
- STL06:0814h 56m1 stopYOW22:04Wed, Jun 12|St. Louis - Ottawa|United Airlines€239€239
- STL06:089h 35m1 stopYOW16:43Thu, Jun 27|St. Louis - Ottawa|United Airlines€243€243
- STL08:0711h1 stopYOW20:07Thu, May 30|St. Louis - Ottawa|American Airlines€244€244
- STL06:0916h 50m1 stopYOW23:59Thu, Jun 27|St. Louis - Ottawa|American Airlines€248€248
- STL06:089h 30m1 stopYOW16:38Fri, Jun 14|St. Louis - Ottawa|United Airlines€252€252
- STL13:003h 5mDirectYOW14:00Sat, Jun 1|St. Louis - Ottawa|Frontier 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 St. Louis to Ottawa.
- CheapestSTL08:168h 11m1 transferYOW17:27St. Louis Lambert International Airport - Ottawa Macdonald-Cartier International AirportWed, Jun 12Frontier Airlines€156
- STL08:168h 11m1 transferYOW17:27St. Louis Lambert International Airport - Ottawa Macdonald-Cartier International AirportWed, Jun 12Frontier Airlines€156Find More Flights
Frequently Asked Questions
How to find a cheap flight from St. Louis to Ottawa
Cheapest nonstop flight price | €155 |
---|---|
Off-season for travel | December |
Peak season for travel | July |
Flight distance | 1,409.41km |
Popular airline | United Airlines |
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