🇬🇧 LHR
London
4821 mi
SEA 🇺🇸
Seattle

London to Seattle Flights

London Heathrow Airport Seattle–Tacoma International Airport 4 airlines

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The London to Seattle route connects London Heathrow Airport (LHR) in GB with Seattle–Tacoma International Airport (SEA) in US. This long-haul flight covers approximately 4821 miles (7759 km) with a typical flight time of 9h 35m. This route is served by 4 airlines: British Airways, Delta Air Lines, ASA and others. AirportRoutes has tracked 6 unique flight numbers on this route.

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Departure Airport

London Heathrow Airport

ICAO Code:
EGLL
IATA Code:
LHR
City:
🇬🇧 London
Country:
GB
Elevation:
83 ft

Destination Airport

Seattle–Tacoma International Airport

ICAO Code:
KSEA
IATA Code:
SEA
City:
🇺🇸 Seattle
Country:
US
Elevation:
433 ft

4

Operators

6

Tracked Flights

4821

Miles

9h 35m

Flight Duration

Route Map

Operating Airlines

Airline ICAO IATA
British Airways BAW BA
Delta Air Lines DAL DL
Alaska Airlines ASA AS
Virgin Atlantic VIR VS

Flight Schedule Pattern

Day Flights Observed Frequency Activity
Monday 0 0%
Tuesday 2 10%
Wednesday 3 15%
Thursday 4 20%
Friday 7 35%
Saturday 4 20%
Sunday 0 0%

Pattern Analysis

6 Tracked Flights:
Data Points: 20
API observations used to build this analysis
Weekdays: 16 flights
Weekend: 4 flights
Business Route More active on weekdays

All Flight Routes

4 Routes
Note: This table shows aggregated route data by airline. Each airline may operate multiple daily flights at different times. See the "Spotted Departure Times" section below for all observed departure times.
Airline Flight Numbers Aircraft Type Typical Time Days Active Last Seen Status
A339 17:45 5:45 PM (Representative)
M T W T F S S
Jun 23, 2026 Active
B77W 16:30 4:30 PM (Representative)
M T W T F S S
Jun 30, 2026 Active
A339 17:45 5:45 PM (Representative)
M T W T F S S
Jun 30, 2026 Active
B789 15:05 3:05 PM (Representative)
M T W T F S S
Jun 30, 2026 Active
Total Routes: 4
Active Routes: 4
Unique Airlines: 4
Aircraft Types: 4

Spotted Departure Times

Departure Time Operator ICAO IATA
15:05 3:05 PM Virgin Atlantic VIR VS
16:30 4:30 PM British Airways BAW BA
17:45 5:45 PM Alaska Airlines ASA AS
17:45 5:45 PM Delta Air Lines DAL DL

Time Information

Times are shown in the departure airport's local timezone (EGLL - Europe/London).

Total Departure Times: 4
Time Range:
15:05 - 17:45
These are typical departure times observed from actual flights. Times may vary by season and schedule changes.