Round Trip Boston - Denver Airfares for $141

Southwest, American, JetBlue, and Expedia are offering round trip airfares between Boston and Denver for $141. These are basic economy fares with a personal item and carry-on included, but no seat selection or changes allowed. Travel dates are available from September through December 2026, with multiple options on select dates. This fare is down from a listed price of approximately $189. Such prices are competitive for nonstop or one-stop flights on these major airlines during this period, making this a solid deal for travelers planning on these routes.