British Airways
Oneworld
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Seattle–Tacoma International Airport
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United Kingdom
London Heathrow Airport
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Scan through all non-stop flights from Seattle / Tacoma to London Heathrow. The full flight schedule below gives an overview of all non-stop flights from SEA to LHR, which includes the daily timetable of every operating airline for the upcoming 12 months.
Note: for airline-specific flight schedules, please scroll further down.
London Heathrow is an oceanic/maritime destination, known for its mild summer temperatures, which are usually between 15°C and 25°C (59°F to 77°F). The winters here are refreshingly cool, without the harshness of freezing temperatures. Visitors can enjoy the green surroundings and plenty of outdoor adventures in the nearby areas, making it an excellent choice for those who enjoy temperate weather.
The best time to visit London Heathrow is during the summer months, spanning from May to August. During this period, visitors can expect pleasant to warm temperatures, while rainfall tends to occur more frequently in the autumn and winter months, from September to February.
In total there are 4 airlines operating nonstop flights from Seattle / Tacoma SEA to London Heathrow LHR. This section gives an overview of the flight schedules and timetables of every airline with direct flights for this route.
Click an airline below to view their SEA LHR flight schedule.
Flights from SEA to LHR are operated 26 times a week, with an average of 4 flights per day. Departure times vary between 13:25 - 22:05. The earliest flight departs at 13:25, the last flight departs at 22:05. However, this depends on the date you are flying so please check with the full flight schedule above to see which departure times are available on your preferred date(s) of travel.
You can fly in Economy, Premium Economy, Business or First class on this non-stop route.
The fastest direct flight from Seattle / Tacoma to London Heathrow takes 9 hours and 25 minutes. The flight distance between Seattle / Tacoma and London Heathrow is 4,783 miles (or 7,697 km).
There are 6 airports in London Heathrow: London Heathrow Airport (LHR), London City Airport (LCY), London Gatwick Airport (LGW), London Luton Airport (LTN), London Stansted Airport (STN) and London Southend Airport (SEN).
There are 26 flights per week flying from Seattle / Tacoma to London Heathrow (as of April 2026).
9 hours and 25 minutes is the average flight time from Seattle / Tacoma to London Heathrow.
The distance from Seattle / Tacoma to London Heathrow is 4,783 miles (7,697 kilometers).
Alaska, British Airways, Delta and Virgin Atlantic are flying nonstop from Seattle / Tacoma to London Heathrow.
Oneworld and SkyTeam are flying nonstop from Seattle / Tacoma to London Heathrow.
You can fly non-stop in Economy, Premium Economy, Business Class and First Class.
Aircraft types that fly from Seattle / Tacoma to London Heathrow:
The earliest flight departs at 13:25 from Seattle / Tacoma and arrives at 07:00 at London Heathrow.
The latest flight departs at 22:05 from Seattle / Tacoma and arrives at 15:35 at London Heathrow.
4,783 miles (7,697 km) · 9h 25m
13:30
06:45
British Airways
Oneworld
BA 52
British Airways
Boeing 787-10
Y
W
J
F
13:30
06:45
British Airways
Oneworld
BA 52
British Airways
Boeing 787-10
Y
W
J
F
18:20
12:10
Virgin Atlantic
SkyTeam
VS 106
Virgin Atlantic
Airbus A330-900neo
Y
W
J
F
20:10
14:00
Virgin Atlantic
SkyTeam
VS 106
Virgin Atlantic
Airbus A330-900neo
Y
W
J
F
20:20
13:45
British Airways
Oneworld
BA 48
British Airways
Boeing 777-300ER
Y
W
J
F
20:20
13:45
British Airways
Oneworld
BA 48
British Airways
Boeing 777-300ER
Y
W
J
F
21:45
15:35
Delta
SkyTeam
DL 20
Delta
Airbus A330-900neo
Y
W
J
F
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