British Airways flights from SEA to LHR
Find comprehensive British Airways flight information, schedules, and booking details for direct flights from SEA to LHR. British Airways operates 2-4 flights daily flights on this route.• Flight Duration: 9h 15m - 10h 50m (average flight time)• Distance: 4812 miles (7743 km) (air miles between airports)• Daily Flights: 2-4 flights (scheduled departures per day)
SEA
LHR
FLIGHT TIME
9h 15m - 10h 50m
FLIGHT DISTANCE
4812 miles (7743 km)
9h 30m - 9h 30m
18:50
18:50
4812 miles (7743 km)
March
1 (Show)
21
British Airways Flight Schedule from SEA to LHR
| Flight | Airline | Departure | Arrival | Aircraft |
|---|---|---|---|---|
BA48 |  British Airways | 18:50 | 12:20:00 | Boeing 777-300ER |
British Airways Monthly Flight Calendar
December 2025
Route Insights
Pricing patterns: March typically offers lower prices due to reduced demand outside peak travel seasons.
Best departure times: Peak departure times are 18:00, offering more flight options and potentially better connections.
SEA - LHR flight price statistics
$856
ApproximateThe numbers are average prices found based on user searches for direct flights between the airports. It's calculated from the cheapest prices found per month for a round-trip with 1 adult and can vary depending on the amount of data we have for this particular route.
$839
Jan$650
Feb$577
Mar$582
Apr$580
May$1304
Jun$1354
Jul$1049
Aug$844
Sep$829
Oct$825
Nov$844
DecBritish Airways Terminal Information
Terminal information for British Airways on this route is currently being updated. Please check back soon or contact the airports directly for terminal details.
Frequently Asked Questions about British Airways Flights
How many British Airways flights operate from SEA to LHR?
British Airways operates 1 flight from SEA to LHR.
What city does LHR airport serve?
LHR airport serves London.
How long is the British Airways flight from SEA to LHR?
The flight duration is approximately 9h 15m - 10h 50m.
What is the distance from SEA to LHR?
The distance is 4812 miles (7743 km).
What aircraft does British Airways use on this route?
British Airways uses Boeing 777-300ER on this route.
Which other airlines operate on this route?
2 other airlines operate on this route: Delta Air Lines, Virgin Atlantic.
What is the cheapest month to fly British Airways from SEA to LHR?
March is typically the cheapest month to fly British Airways on this route.
What is the average price for a British Airways flight from SEA to LHR?
The average price for a round-trip British Airways flight on this route is approximately $856. Prices can vary based on booking time and demand.
How many British Airways flights operate per week on this route?
British Airways operates approximately 21 flights per week from SEA to LHR.