Cheap flights from St. Louis, MO to Ottawa, Canada

Travelers frequently search for route combinations, such as St. Louis and Las Vegas, Los Angeles, Denver, Orlando, Atlanta, Minneapolis, San Diego, San Francisco, London, Phoenix, Seattle, Houston, Sacramento, New York, Cancún, Washington, D.C., Fort Lauderdale, Oakland, Tampa, Paris.

Travelers frequently search for route combinations, such as Ottawa and San Francisco, Atlanta, New York, Minneapolis, Boston, Toronto, Moncton, Paris, San Diego, Fort Lauderdale, Panama, London, Tampa, Chicago, Lisbon, Amsterdam, Baghdad, Berlin, Dublin, Edinburgh.

The main airport in St. Louis is St. Louis Lambert International. It is also served by St. Louis Lambert International, Abraham Lincoln Capital, General Wayne A. Downing Peoria International, Evansville Regional, Cape Girardeau Regional, MidAmerica St. Louis, Barkley Regional, Waynesville-St. Robert Regional, Central Illinois Regional, Williamson County Regional.

The main airport in Ottawa is Ottawa Macdonald–Cartier International. It is also served by Montréal–Pierre Elliott Trudeau International, Syracuse Hancock International, Plattsburgh International, Ogdensburg International, Massena International, Adirondack Regional, Watertown International, Montreal Saint-Hubert Longueuil.

Yes, it's possible to combine different modes of transport between St. Louis and Ottawa thanks to our Virtual Interlining technology. Making use of not only flights but also trains and buses between St. Louis and Ottawa can give rise to new adventures. Read more about how Virtual Interlining works on Kiwi.com Stories.

Virtual Interlining provides a revolutionary way of traveling. You can combine different modes of transport like flights, trains, and buses into one itinerary. And this often saves money. Thanks to the world's largest carrier database, the Kiwi.com search function enables anyone to mix and match different modes of transport easily.

Currently, you can fly between St. Louis and Ottawa with Porter Airlines, Frontier Airlines, Spirit Airlines, United Airlines, Flair Airlines.

If you don’t have specific dates for your trip between St. Louis and Ottawa, you can enter a date range into the departure and return fields. Most carriers on the Kiwi.com website allow you to search and book up to six months from the day of your search. Order the search results by the best, cheapest, or fastest route, or find the cheapest outbound and return combination in the pricing table.

Traveling between St. Louis and Ottawa, you can choose between direct (nonstop) flights or flights with one or more stops. You can select the number of stops on your journey, including an overnight stopover, and the duration of the stopover. What's more, you can also select where you want to have your stopover. Want to say "Hi" to a friend in another city en route to your destination? Or fancy a quick round of shopping? Go Multi-City or Nomad and add places to your search that you wish to visit.