Flights Washington → Boston — September 24, 2026

One way · Economy · 1 adult · price per person

The cheapest itinerary observed for Thursday, September 24, 2026 on the Washington–Boston route: 1 stop itinerary (2 flights) via Orlando International (MCO), from Washington Dulles (IAD) to Boston Logan (BOS), first flight Frontier Airlines F94355, departs 11:12 AM, arrives 10:51 AM the next day, total travel time 23h 39m including layovers, flight time 5h 28m (layovers excluded), $164 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes not allowed, non-refundable. Price found in an Aviasales search on September 9, 2026 and read by AirSource on September 10, 2026, 20:47 UTC: it is not guaranteed and is confirmed on Aviasales at booking time. The cheapest direct flight observed: United Airlines UA755, from Washington Dulles (IAD) to Boston Logan (BOS), departs 10:15 PM, arrives 11:59 PM, direct, 1h 44m, $185 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes not allowed, non-refundable.