Cheap flights from Seattle to Belleville from $243

Travelers frequently search for route combinations, such as Seattle and Mexico City, New York, Los Angeles, Guadalajara, Las Vegas, Calgary, Phoenix, San Francisco, Dallas, Chicago, Honolulu, San Diego, Ontario, Denver, Washington, D.C., Orlando, Santa Ana, Kahului, London, Tokyo.

Travelers frequently search for route combinations, such as Belleville and Punta Gorda, Knoxville, Orlando, Sarasota, Harrisburg, Pensacola, Washington, D.C., Jacksonville, Cleveland, Dayton, Columbus, Little Rock, Reno, Raleigh, Charleston, Appleton, Tallahassee, Las Vegas, Albuquerque, Philadelphia.

Seattle is mainly served by Seattle–Tacoma International. But there are other airports nearby, including Boeing Field, Kenmore Air Harbor Seaplane Base.

The main airport in Seattle is Seattle–Tacoma International. It is also served by Vancouver International, Portland International, Abbotsford International, Bellingham International, Paine Field Everett, Vancouver Harbour Flight Centre, Victoria Inner Harbour SPB, Pangborn Memorial, Yakima Air Terminal.

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

Currently, you can fly between Seattle and Belleville with Allegiant Air, Frontier Airlines, JetBlue Airways, Air Excursions, WestJet.

If you don’t have specific dates for your trip between Seattle and Belleville, 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 Seattle and Belleville, 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 Seattle. The main one is Seattle–Tacoma International and other nearby airports include Vancouver International, Portland International, Abbotsford International, Bellingham International, Paine Field Everett, Vancouver Harbour Flight Centre, Victoria Inner Harbour SPB, Pangborn Memorial, Yakima Air Terminal