American Airlines will launch second daily flights from Heathrow to Philadelphia and Los Angeles this weekend.
Flights to LA start on March 29 and to Philadelphia on March 30.
Operated on Boeing 757 aircraft, the Philadelphia flight leaves Heathrow at 8.20am and arrives at 11.40am local time, returning at 9.45am and arriving in London at 10.10pm.
The LA service, using a Boeing 777, departs London at 12.15pm and arrives at 3.30pm local time, returning at 5.50pm and landing at Heathrow at 12.25pm the next day.
