Check out http://gc.kls2.com. It's called the great circle mapper, and it'll give you an idea of what the shortest path between the two cities is. Just so you know, that flight will take off to the west from Heathrow, fly over Northern Ireland, just south of Iceland, cross the southern end of Greenland and Baffin Island, make landfall around Churchill in Manitoba, and enter the U.S. in western Montana.
11 hours
The flight time from London Heathrow Airport to San Francisco International Airport is about 10 hours, 44 minutes.
The flight time from London Heathrow Airport to Indianapolis International Airport is 8 hours.
The average flight time from London Heathrow Airport to Philadelphia International Airport is 7 hours, 5 minutes.
The flight distance from Chicago O'Hare International Airport to London Heathrow Airport is about 3,955 miles.
The flight distance from Edinburgh Airport to London Heathrow Airport is 332 miles / 534 km
The flight time from Denver International Airport to London Heathrow Airport is 9 hours, 21 minutes.
You can book a cheap flight to London Heathrow Airport by using the website skyscanner. Expedia and Travelocity may also have cheap flights to Heathrow Airport.
The flight time from Oslo, Norway to London Heathrow Airport is about 1 hour, 27 minutes.
It takes about 8 hours flight from islamabad to London heathrow.
The flight time from London Heathrow Airport to Athens, Greece is: 3 hours, 30 minutes
The flight distance from London Heathrow Airport to Johannesburg, South Africa is 5,621 miles / 9,046 km.