LHR to SEA: Distance and Flight Time
The distance from London Heathrow Airport (LHR) to Seattle–Tacoma International Airport (SEA) is 7,702 km (4,786 mi). A typical nonstop flight covers it in about 10h 10m, heading northwest. The distance is the same in either direction (SEA to LHR).
How far is it from London to Seattle?
The great-circle distance between London Heathrow Airport (LHR) and Seattle–Tacoma International Airport (SEA) is 7,702 km (4,786 mi, 4,159 nautical miles). That is the straight-line distance; a real flight is a little longer because of air-traffic routing.
How long is the flight from LHR to SEA?
A nonstop flight typically takes about 10h 10m. This is an estimate from the distance; actual block times depend on the aircraft, winds and the exact routing. SEA is roughly northwest of LHR.
How is the LHR to SEA route written in code?
The pair is written LHR-SEA in IATA codes and EGLL-KSEA in ICAO codes, the form used on a flight plan. London Heathrow Airport is LHR (EGLL), Seattle–Tacoma International Airport is SEA (KSEA).
| LHR | SEA | |
|---|---|---|
| Airport | London Heathrow Airport | Seattle–Tacoma International Airport |
| ICAO code | EGLL | KSEA |
| Country | United Kingdom | United States |
| Elevation | 83 ft | 433 ft |
| Rank by connections | #4 | #67 |
EGLL starts with E, the ICAO prefix for northern Europe; KSEA starts with K, the prefix for the contiguous United States. How ICAO prefixes are laid out.
SEA sits 350 ft (107 m) higher than LHR, which is a real difference in air density on takeoff.
Airlines flying LHR to SEA
6 airlines appear on this route in the open route dataset, 6 of them still listed as active. Each row gives the IATA code, the ICAO code and the radio callsign, which is what an air traffic controller hears:
| IATA | Airline | ICAO | Callsign | Status |
|---|---|---|---|---|
| AA | American Airlines | AAL | American | Active |
| AF | Air France | AFR | Airfrans | Active |
| AY | Finnair | FIN | Finnair | Active |
| BA | British Airways | BAW | Speedbird | Active |
| DL | Delta Air Lines | DAL | Delta | Active |
| VS | Virgin Atlantic Airways | VIR | Virgin | Active |
A further 2 carriers sell this pair as a codeshare without operating it: IB, KL.
Route and carrier data comes from the OpenFlights open dataset, regenerated here on . It is a historical snapshot of scheduled connections, not a live schedule, and it includes codeshare listings, so some carriers shown may no longer operate the route or exist. How we build this · Data and sources.
Frequently asked questions
How far is London from Seattle?
London Heathrow Airport (LHR) and Seattle–Tacoma International Airport (SEA) are 7,702 km (4,786 mi, 4,159 nautical miles) apart in a straight line.
How long is the flight from LHR to SEA?
A typical nonstop flight between LHR and SEA takes about 10h 10m. Actual times vary with aircraft type, winds and routing.
What direction is SEA from LHR?
Seattle–Tacoma International Airport (SEA) lies roughly northwest of London Heathrow Airport (LHR).
Which airlines fly LHR to SEA?
6 airlines appear on the LHR-SEA route in the open dataset, including American Airlines, Air France, Finnair.
Related routes
Other routes from London (LHR):
Other routes from Seattle (SEA):
LHR airport code · SEA airport code · Busiest airports worldwide