London (LHR) to Seattle (SEA) flights
British Airways, Delta Air Lines, Alaska Airlines, Virgin Atlantic fly nonstop from London Heathrow Airport to Seattle-Tacoma International Airport, with about 34 flights a week in July 2026. The 4,800-mile flight takes about 3h 13m gate to gate.
From
LHR
London
London Heathrow Airport
To
SEA
Seattle
Seattle-Tacoma International Airport
- Distance
- 4,800 mi · 7,725 km
- Flight time
- 3h 13m
- Airlines
- 4
- Seats filled
- 80%
Flights a week, July 2026
1,352 flights and 279,071 passengers in 12 months
Airlines flying LHR to SEA
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| British Airways | 14 | Boeing 787-10 Dreamliner, Boeing 777-300/300ER/333ER, Boeing 777-200ER/200LR/233LR | 139,714 | 0m |
| Delta Air Lines | 7 | Airbus A330-900, Airbus A330-200, Airbus A330-300/333 | 66,958 | 10h 6m |
| Alaska Airlines | 7 | Boeing 787-9 Dreamliner | 16,229 | 9h 56m |
| Virgin Atlantic | 7 | Airbus A330-900neo, Boeing 787-9 Dreamliner, Airbus A330-300/333 | 56,170 | 0m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 124 | 29,603 | |
| September 2025 | 119 | 26,358 | |
| October 2025 | 116 | 24,107 | |
| November 2025 | 89 | 15,467 | |
| December 2025 | 92 | 18,251 | |
| January 2026 | 93 | 16,516 | |
| February 2026 | 81 | 13,981 | |
| March 2026 | 94 | 18,926 | |
| April 2026 | 112 | 21,459 | |
| May 2026 | 134 | 26,420 | |
| June 2026 | 146 | 29,448 | |
| July 2026 | 152 | 38,535 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.