LGW to SEA Route Guide
London, United Kingdom → Seattle, United States
Quick answer
EGKK (London, United Kingdom) to KSEA (Seattle, United States) is a 4,180 NM (7,741 km / 4,810 mi) great-circle route with an initial bearing of 322° (NW). Typical cruise altitude FL410, expected flight time 9h 13m, common aircraft: Boeing 777-300ER, Airbus A350-900, Boeing 787-9.
Distance
4,180 NM
7,741 km / 4,810 mi
Initial Bearing
322° (NW)
True heading at departure
Typical Cruise
FL410
41,000 ft
Block Time
9h 13m
Typical jet, no wind correction
Fuel Estimate
14,040 kg
Single-aisle equivalent + reserve
Departure Elevation
202 ft
EGKK
Arrival Elevation
433 ft
KSEA
What aircraft fly this route?
For a 4,180 NM mission, operators typically deploy:
- Boeing 777-300ER
- Airbus A350-900
- Boeing 787-9
- Airbus A330-900neo
Weather considerations
Pilots flying LGW-SEA should brief METARs and TAFs at both ends, plus any en-route SIGMETs. On this long-range mission, plan for an alternate within fuel reserves and review oceanic / NAT track procedures if applicable.
Frequently asked questions
What is the distance between LGW and SEA?
4,180 nautical miles (7,741 km / 4,810 statute miles) great-circle.
How long is the flight from London to Seattle?
Approximately 9h 13m block-to-block for a typical commercial jet, depending on aircraft type and winds.
What aircraft typically fly LGW-SEA?
Common types include Boeing 777-300ER, Airbus A350-900, Boeing 787-9, Airbus A330-900neo depending on operator and demand.
What altitude do flights cruise at?
Most flights at this distance cruise around FL410 (41,000 ft), though winds and traffic affect filed altitude.
What initial heading is the route?
322° true (NW). Track varies along the route due to great-circle curvature.
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