Air Miles Calculator

Distance between Seattle, WA (SEA) and London (LHR)

Distance from Seattle–Tacoma International Airport to Heathrow Airport is 4800 miles / 7725 kilometers / 4171 nautical miles.

Calculations with different methods

Vincenty's formula (applied above)
  • 4800.220 miles
  • 7725.205 kilometers
  • 4171.277 nautical miles

Vincenty's formula calculates the distance between latitude/longitude points on the earth’s surface, using an ellipsoidal model of the earth.

Haversine formula
  • 4785.859 miles
  • 7702.094 kilometers
  • 4158.798 nautical miles

The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance).

Flight duration

Estimated flight time from Seattle–Tacoma International Airport (SEA) to Heathrow Airport (LHR) is 9 hours 35 minutes.

Time difference and current local times

The time difference between Seattle and London is 8 hours. London is 8 hours ahead of Seattle.

Time Difference

Seattle
London

Seattle, WA

 PST

London

 GMT

Airport information


A Seattle–Tacoma International Airport
City: Seattle, WA
Country: United States Flag of United States
IATA Code: SEA
ICAO Code: KSEA
Coordinates: 47°26′56″N, 122°18′32″W

B Heathrow Airport
City: London
Country: United Kingdom Flag of United Kingdom
IATA Code: LHR
ICAO Code: EGLL
Coordinates: 51°28′14″N, 0°27′42″W

Map

Flight map from Seattle to London.

Frequent Flyer Miles Calculator

Seattle (SEA) → London (LHR).

Elite level bonus (%):
Booking class bonus (%):
Air miles:
4800
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
4800

Round trip?