Flights London → Washington — September 22, 2026

One way · Economy · 1 adult · price per person

The cheapest itinerary observed for Tuesday, September 22, 2026 on the London–Washington route: 2 stops itinerary (3 flights) via Madrid (MAD) and Lisbon (LIS), from London Stansted (STN) to Washington Dulles (IAD), first flight Ryanair FR2628, departs 12:30 PM, arrives 3:10 PM the next day, total travel time 31h 40m including layovers, flight time 12h 25m (layovers excluded), $462 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 10, 2026 and read by AirSource on September 10, 2026, 19:03 UTC: it is not guaranteed and is confirmed on Aviasales at booking time. The cheapest direct flight observed: United Airlines UA919, from London Heathrow (LHR) to Washington Dulles (IAD), departs 12:15 PM, arrives 3:30 PM, direct, 8h 15m, $938 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes not allowed, non-refundable.