Back to CalculatorRoute ID: LHR-SEA
Flight Distance from London (LHR) to Seattle (SEA)
Comprehensive aviation route data, direct distance, flight duration, CO₂ footprint, passport visa rules and interactive map.
Origin Airport
LHREGLL
London, United Kingdom
London Heathrow Airport
Great Circle Path
7,702 km4,786 miles • 4,159 NM
Destination Airport
KSEASEA
Seattle, United States
Seattle–Tacoma International Airport
Direct Distance
7,702 km
4,786 Statute Miles
4,159 Nautical Miles
Commercial Flight
9h 34m
Est. non-stop flight duration (~850 km/h cruising speed + buffer)
CO₂ Footprint
693 kg
Estimated carbon footprint per economy passenger (~90g CO₂/km)
Initial Heading
322° True
Initial compass bearing towards destination
Estimated Travel Duration by Aircraft Class
Commercial Jet (Boeing 787 / A350)
9h 34m
Speed: ~850 km/h (459 knots)
Business Jet (Gulfstream G650)
8h 52m
Speed: ~920 km/h (496 knots)
Turboprop Aircraft (ATR-72 / Q400)
15h 19m
Speed: ~520 km/h (280 knots)
Passport & Visa Entry Requirements
🇬🇧 United Kingdom→🇺🇸 United States
Allowed Stay90 days
Passport Validity Required6 months
💡 Official Note: ESTA online authorization required.
This information is provided for general guidance only and does not replace official verification with an embassy, consulate, or the IATA Travel Centre before you travel.
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Flight Path & Geodetic Arc Map
Great Circle Flight Arc Path
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Departure Airport Specs
London Heathrow Airport (LHR)
- City / Country: London, United Kingdom
- ICAO Code: EGLL
- Coordinates: 51.4707°, -0.4599°
- Timezone: Europe/London
- Elevation: 83 ft
Arrival Airport Specs
Seattle–Tacoma International Airport (SEA)
- City / Country: Seattle, United States
- ICAO Code: KSEA
- Coordinates: 47.4479°, -122.3103°
- Timezone: America/Los_Angeles
- Elevation: 433 ft
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