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

Travelers frequently search for route combinations, such as Ottawa and Halifax, Toronto, Amsterdam, Moncton, Istanbul, Geneva, Lisbon, Barcelona, Berlin, Madrid, Athens, Calgary, New York, Paris, Vienna, Miami, Montreal, London, Glasgow, Orlando.

Travelers frequently search for route combinations, such as St. Louis and London, Manchester, New York, Cebu, San Jose, Atlanta, Los Angeles, Orlando, Edinburgh, Houston, San Francisco, Seattle, Phoenix, Portland, Denver, Dallas, Glasgow, Paris, Charlotte, Washington, D.C..

Ottawa is mainly served by Ottawa Macdonald–Cartier International. But there are other airports nearby, including Ottawa / Rockcliffe Airport.

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, Montreal Saint-Hubert Longueuil, Watertown International.

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, MidAmerica St. Louis, Cape Girardeau Regional, Barkley Regional, Waynesville-St. Robert Regional, Williamson County Regional, Quincy Regional.

Yes, it's possible to combine different modes of transport between Ottawa and St. Louis thanks to our Virtual Interlining technology. Making use of not only flights but also trains and buses between Ottawa and St. Louis 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 Ottawa and St. Louis with Porter Airlines, Frontier Airlines, Spirit Airlines, United Airlines, Southern Airways Express.

If you don’t have specific dates for your trip between Ottawa and St. Louis, 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.