Flights Boston → Washington — September 23, 2026

One way · Economy · 1 adult · price per person

The cheapest itinerary observed for Wednesday, September 23, 2026 on the Boston–Washington route: 1 stop itinerary (2 flights) via Atlanta Hartsfield-Jackson (ATL), from Boston Logan (BOS) to Washington Dulles (IAD), first flight Frontier Airlines F93511, departs 12:54 PM, arrives 12:10 AM the next day, total travel time 11h 16m including layovers, flight time 5h 1m (layovers excluded), $125 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 7, 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: American Airlines AA1535, from Boston Logan (BOS) to Washington Reagan National (DCA), departs 6:00 AM, arrives 7:47 AM, direct, 1h 47m, $178 per person. Fare as listed by Aviasales: carry-on bag included, checked bag not included, changes allowed for a fee, non-refundable.