Delta adds second daily Seattle-London flight starting October 25

Delta Air Lines is planning to expand its transatlantic network this fall with a second daily nonstop service between Seattle-Tacoma International Airport (SEA) and London Heathrow Airport (LHR). This addition is set to nearly double the airline's capacity on this high-demand route.

Currently, Delta operates a single daily nonstop flight using an Airbus A330-900neo, which offers 281 seats including 29 in the Delta One cabin. The existing service runs as Delta Air Lines Flight 260, departing Seattle at 20:25 and arriving in London at 14:15 the following day. The return flight, Delta Air Lines Flight 21, leaves London at 15:50 and reaches Seattle at 19:30.

The new service, slated to start on October 25, 2025, will deploy an Airbus A330-200. Delta Air Lines Flight 292 will depart Seattle at 18:20, reaching London at 11:00 the following day. Conversely, Delta Air Lines Flight 293 will leave London at 12:20 PM, landing in Seattle at 16:00 local time. This change will increase the route from 30 to 60 monthly flights, boosting seat availability from 16,800 to over 30,000 per month.