Cheap flights from Montreal to St. Louis from CA$342

Travelers frequently search for route combinations, such as Montreal and Vancouver, Toronto, Calgary, Edmonton, Mexico City, Winnipeg, Guatemala City, Fort Lauderdale, Cancún, Kelowna, Medellín, Istanbul, Cartagena, Bogotá, Paris, Guadalajara, San José, Halifax, San Salvador, Atlanta.

Travelers frequently search for route combinations, such as St. Louis and Toronto, Edmonton, Winnipeg, Orlando, San Francisco, Victoria, Quebec City, Ottawa, Bogotá, Saskatoon, Calgary, Kelowna, Detroit, Vancouver, Los Angeles.

Montreal is mainly served by Montréal–Pierre Elliott Trudeau International. But there are other airports nearby, including Montreal Saint-Hubert Longueuil, Montréal–Mirabel International.

The main airport in Montreal is Montréal–Pierre Elliott Trudeau International. It is also served by Ottawa Macdonald–Cartier International, Burlington International, Québec City Jean Lesage International, Plattsburgh International, Ogdensburg International, Massena International, Lebanon Municipal, Adirondack Regional.

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

Currently, you can fly between Montreal and St. Louis with Frontier Airlines, Porter Airlines, WestJet, United Airlines, Air Canada.

If you don’t have specific dates for your trip between Montreal 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.

Traveling between Montreal and St. Louis, 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.

There are a number of airports in and around Montreal. The main one is Montréal–Pierre Elliott Trudeau International and other nearby airports include Ottawa Macdonald–Cartier International, Burlington International, Québec City Jean Lesage International, Plattsburgh International, Ogdensburg International, Massena International, Lebanon Municipal, Adirondack Regional