Seattle (SEA) → London (LHR)
About Seattle to London Flights
Discover the best flights from Seattle to London, covering 7,702 km in approximately 10h 8m. Seattle (SEA) to London (LHR) is one of the major long-haul routes connecting United States and United Kingdom. With 7 major airlines operating this route, travelers have plenty of options to choose from. Whether you're traveling for business or leisure, our comprehensive guide helps you find the best deals, understand seasonal price variations, and choose the right airline for your journey from Seattle to London.
12-Month Price History
Flight prices from Seattle to London vary significantly throughout the year. February typically offers the best deals with average prices around $1444, while July sees the highest prices, averaging $2424. Savvy travelers can save up to 40% by choosing their travel dates wisely.
Best Time to Fly
Cheapest Month
February
Save up to 40% on average
Most Expensive
July
Peak season pricing
Book in Advance
104 days
For best prices
Booking Tips
For the best prices on Seattle to London flights, we recommend booking 170 days in advance. International flights typically see price increases as the departure date approaches, so early booking is advisable. Tuesday and Wednesday departures often offer the lowest fares, while Friday and Sunday flights tend to be more expensive due to business and leisure travel demand. Consider flying early morning or late evening for additional savings, as these off-peak times usually have lower demand.
Airlines Serving This Route
| Airline | Economy | Business | First |
|---|---|---|---|
United Airlines UA | $1990 | $7280 | $10080 |
Alaska Airlines AS | $2030 | $7790 | $13750 |
Air France AF | $2170 | $9370 | $11440 |
American Airlines AA | $2510 | $6720 | $10810 |
British Airways BA | $2570 | $8390 | $11970 |
Lufthansa LH | $2600 | $7980 | $13530 |
Delta Air Lines DL | $2630 | $9030 | $11080 |
United Airlines
UA
Economy
$1990
Business
$7280
First
$10080
Alaska Airlines
AS
Economy
$2030
Business
$7790
First
$13750
Air France
AF
Economy
$2170
Business
$9370
First
$11440
American Airlines
AA
Economy
$2510
Business
$6720
First
$10810
British Airways
BA
Economy
$2570
Business
$8390
First
$11970
Lufthansa
LH
Economy
$2600
Business
$7980
First
$13530
Delta Air Lines
DL
Economy
$2630
Business
$9030
First
$11080
Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.
Alternative Flight Options
Seattle → London
Seattle-Tacoma International (SEA) to Gatwick (LGW)
Distance: 7,742 km
Average price: $1640
Seattle → Birmingham
Seattle-Tacoma International (SEA) to Birmingham (BHX)
Distance: 7,562 km
Average price: $1605
Seattle → Birmingham
Seattle-Tacoma International (SEA) to Birmingham (BHX)
Distance: 7,562 km
Average price: $1605
Seattle → Bristol
Seattle-Tacoma International (SEA) to Bristol (BRS)
Distance: 7,612 km
Average price: $1614
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Frequently Asked Questions
How long is the flight from Seattle to London?
The flight time from Seattle (SEA) to London (LHR) is approximately 10 hours and 8 minutes. This duration is for direct flights and may vary depending on aircraft type, weather conditions, and air traffic.
What is the distance between Seattle and London?
The aerial distance between Seattle and London is 7,702 kilometers (4,786 miles). This is the straight-line distance, which is used to calculate flight times.
Which airlines fly from Seattle to London?
Several airlines operate flights between Seattle and London, including Delta Air Lines, Alaska Airlines, British Airways and 4 more airlines. Most flights on this route include one or more stops.
What is the cheapest month to fly from Seattle to London?
Based on historical data, February typically offers the lowest airfares for flights from Seattle to London. However, prices can vary based on holidays, events, and airline promotions. We recommend checking our price calendar for the most up-to-date information.
How far in advance should I book my flight to London?
For the best prices on Seattle to London flights, we recommend booking 176 days in advance. International flights generally require earlier booking than domestic routes.
Do I need a visa to travel from Seattle to London?
Visa requirements depend on your nationality and the purpose of your visit. Citizens of United States traveling to United Kingdom should check the latest visa requirements. Visit our partner site visarequirements.io for detailed visa information.
What is the time difference between Seattle and London?
Seattle operates on America/Los_Angeles time zone, while London is in the Europe/London time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.