Cheap flights from Boston to St. Louis from $123

Travelers frequently search for route combinations, such as Boston and Barcelona, Orlando, Mexico City, Miami, Toronto, San Juan, Atlanta, Tel Aviv, Lisbon, Tampa, San Francisco, Istanbul, San José, Washington, D.C., Dallas, New York, Seattle, Fort Lauderdale, Bogotá, Copenhagen.

Travelers frequently search for route combinations, such as St. Louis and Denver, Orlando, Las Vegas, Los Angeles, London, Dallas, Fort Lauderdale, Bogotá, Mexico City, Tokyo, Frankfurt, Cebu, San Francisco, Athens, Amsterdam, Naples, Cancún, Portland, Washington, D.C., San Diego.

The main airport in Boston is Logan International. It is also served by Logan International, Bradley International, Rhode Island T. F. Green Int'l Airport, Albany International, Portland International Jetport, Tweed New Haven, Manchester–Boston Regional, Portsmouth International Airport at Pease, Augusta State, Lebanon Municipal.

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

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

If you don’t have specific dates for your trip between Boston 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 Boston 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 Boston. The main one is Logan International and other nearby airports include Logan International, Bradley International, Rhode Island T. F. Green Int'l Airport, Albany International, Portland International Jetport, Tweed New Haven, Manchester–Boston Regional, Portsmouth International Airport at Pease, Augusta State, Lebanon Municipal

There are a number of airports in and around St. Louis. The main one is St. Louis Lambert International and other nearby airports include St. Louis Lambert International, MidAmerica St. Louis, Columbia Regional, General Wayne A. Downing Peoria International, Abraham Lincoln Capital, Evansville Regional, Central Illinois Regional, Waynesville-St. Robert Regional, Cape Girardeau Regional, Williamson County Regional.