London (LHR) to Seattle (SEA)
Flight time
≈ 10h 22m
Bearing
322° NW
London (LHR) to Seattle (SEA) is 4,786 miles (7,702 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies LHR–SEA
Filed traffic dataIn May 2026, British Airways operated the most departures, one of 4 carriers flying nonstop LHR–SEA; the Airbus A330-900 was the most common aircraft at 23% of departures; flights ran 77% full.
Departures
269
May 2026
Seats
71,188
both directions
Passengers
55,164
both directions
Load factor
77.5%
RPM ÷ ASM
Who flies LHR–SEA?
British Airways operated the most nonstop LHR–SEA departures in May 2026 (124), one of 4 carriers on the route.
- BA
British Airways
124 departures · 30,980 seats
Share of departures46.1%90.2%
Load
- DL
62 departures · 17,420 seats
Share of departures23.0%64.0%
Load
- VS
Virgin Atlantic
62 departures · 16,488 seats
Share of departures23.0%76.0%
Load
- AS
21 departures · 6,300 seats
Share of departures7.8%56.5%
Load
What plane flies LHR–SEA?
In May 2026, the Airbus A330-900 flew 23% of LHR–SEA departures — more than any other aircraft type.
- Airbus A330-900
62 departures · 64.0% load
23.1% - Boeing 777-300ER
62 departures · 90.6% load
23.1% - Airbus A330-900
60 departures · 75.8% load
22.3% - Boeing 787-10
46 departures · 90.6% load
17.1% - Boeing 787-9
37 departures · 67.2% load
13.8% - Airbus A330-300
2 departures · 82.0% load
0.7%
How has LHR–SEA traffic changed?
Nonstop LHR–SEA departures rose from 239 in June 2025 to 269 in May 2026.
Monthly nonstop LHR–SEA traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
239 departures · 53,008 passengers
83.6%
Load
July 2025
244 departures · 58,107 passengers
90.1%
Load
August 2025
247 departures · 59,499 passengers
92.3%
Load
September 2025
239 departures · 56,028 passengers
88.7%
Load
October 2025
233 departures · 46,103 passengers
76.4%
Load
November 2025
177 departures · 32,836 passengers
77.6%
Load
December 2025
184 departures · 37,134 passengers
83.8%
Load
January 2026
185 departures · 33,458 passengers
75.0%
Load
February 2026
162 departures · 28,686 passengers
73.6%
Load
March 2026
187 departures · 37,597 passengers
83.1%
Load
April 2026
223 departures · 43,579 passengers
73.9%
Load
May 2026
269 departures · 55,164 passengers
77.5%
Load
By direction
Each direction is filed separately — they rarely match.
SEA → LHR
80.4% full
135 departures · 28,744 passengers
LHR → SEA
74.5% full
134 departures · 26,420 passengers
Nonstop LHR–SEA traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through May 2026; filings from 2025. Public domain (US Government work).
The airports
London
GB
London Heathrow Airport
Coordinates
51.47°N, 0.46°W
Hemisphere
N · W
Frequently asked
How far is London (LHR) from Seattle (SEA)?
LHR to SEA is 4,786 miles (7,702 km / 4,159 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from LHR to SEA?
A nonstop covers the 4,786-mile great-circle distance in roughly 10h 22m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies LHR–SEA?
In May 2026, the Airbus A330-900 flew the largest share of departures (23.1%), followed by the Boeing 777-300ER (23.1%).
What mileage do I earn flying LHR–SEA?
Distance-based programs credit off the 4,786-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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