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
US DOT T-100 · filed dataIn April 2026, British Airways operated the most departures, one of 3 carriers flying nonstop LHR–SEA; the Airbus A330-900 was the most common aircraft at 27% of departures; flights ran 74% full.
Departures
223
April 2026
Seats
59,007
both directions
Passengers
43,579
both directions
Load factor
73.9%
passengers ÷ seats
Who flies LHR–SEA?
British Airways operated the most nonstop LHR–SEA departures in April 2026 (105), one of 3 carriers on the route.
- BA
British Airways
105 departures · 26,762 seats
Share of departures47.1%87.5%
Load
- VS
Virgin Atlantic
60 departures · 15,960 seats
Share of departures26.9%64.4%
Load
- DL
Delta Air Lines
58 departures · 16,285 seats
Share of departures26.0%60.6%
Load
What plane flies LHR–SEA?
In April 2026, the Airbus A330-900 flew 27% of LHR–SEA departures — more than any other aircraft type.
- Airbus A330-900
60 departures · 64.4% load
26.9% - Boeing 777-300ER
59 departures · 92.0% load
26.5% - Airbus A330-900
58 departures · 60.6% load
26.0% - Boeing 787-10
46 departures · 81.9% load
20.6%
How has LHR–SEA traffic changed?
Nonstop LHR–SEA departures fell from 245 in May 2025 to 223 in April 2026.
Monthly nonstop LHR–SEA traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
245 departures · 50,405 passengers
78.4%
Load
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
By direction
The DOT files each direction separately — they rarely match.
LHR → SEA
72.4% full
112 departures · 21,459 passengers
SEA → LHR
75.3% full
111 departures · 22,120 passengers
Nonstop LHR–SEA traffic has been filed with the US DOT since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through April 2026; filings from 2025. Public domain (US Government work). The DOT publishes roughly three months in arrears.
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 April 2026, the Airbus A330-900 flew the largest share of departures (26.9%), followed by the Boeing 777-300ER (26.5%).
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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