Flights London → Washington — September 15, 2026

One way · Economy · 1 adult · price per person

The cheapest itinerary observed for Tuesday, September 15, 2026 on the London–Washington route: 2 stops itinerary (3 flights) via Madrid (MAD) and Lisbon (LIS), from London Luton (LTN) to Washington Dulles (IAD), first flight Wizz Air UK W95355, departs 8:00 AM, arrives 3:10 PM the next day, total travel time 36h 10m including layovers, flight time 12h 35m (layovers excluded), $520 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, 19:03 UTC: it is not guaranteed and is confirmed on Aviasales at booking time. The cheapest direct flight observed: British Airways BA6630, from London Heathrow (LHR) to Washington Dulles (IAD), departs 4:25 PM, arrives 7:40 PM, direct, 8h 15m, $1,080 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes not allowed, non-refundable.