London (LHR) → Seattle (SEA)
About London to Seattle Flights
Discover the best flights from London to Seattle, covering 7,702 km in approximately 10h 8m. London (LHR) to Seattle (SEA) is one of the major long-haul routes connecting United Kingdom and United States. 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 London to Seattle.
12-Month Price History
Flight prices from London to Seattle vary significantly throughout the year. February typically offers the best deals with average prices around $1434, while July sees the highest prices, averaging $2423. Savvy travelers can save up to 41% 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
76 days
For best prices
Booking Tips
For the best prices on London to Seattle flights, we recommend booking 131 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 |
|---|---|---|---|
British Airways BA | $2110 | $9260 | $14310 |
Alaska Airlines AS | $2160 | $7300 | $13210 |
American Airlines AA | $2220 | $6660 | $13360 |
Lufthansa LH | $2240 | $7420 | $13550 |
Delta Air Lines DL | $2370 | $7700 | $12170 |
United Airlines UA | $2450 | $7220 | $13010 |
Air France AF | $2530 | $8770 | $11230 |
British Airways
BA
Economy
$2110
Business
$9260
First
$14310
Alaska Airlines
AS
Economy
$2160
Business
$7300
First
$13210
American Airlines
AA
Economy
$2220
Business
$6660
First
$13360
Lufthansa
LH
Economy
$2240
Business
$7420
First
$13550
Delta Air Lines
DL
Economy
$2370
Business
$7700
First
$12170
United Airlines
UA
Economy
$2450
Business
$7220
First
$13010
Air France
AF
Economy
$2530
Business
$8770
First
$11230
Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.
Alternative Flight Options
London → Seattle
Gatwick (LGW) to Seattle-Tacoma International (SEA)
Distance: 7,742 km
Average price: $1640
Birmingham → Seattle
Birmingham (BHX) to Seattle-Tacoma International (SEA)
Distance: 7,562 km
Average price: $1605
Birmingham → Seattle
Birmingham (BHX) to Seattle-Tacoma International (SEA)
Distance: 7,562 km
Average price: $1605
Bristol → Seattle
Bristol (BRS) to Seattle-Tacoma International (SEA)
Distance: 7,612 km
Average price: $1614
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Frequently Asked Questions
How long is the flight from London to Seattle?
The flight time from London (LHR) to Seattle (SEA) 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 London and Seattle?
The aerial distance between London and Seattle is 7,702 kilometers (4,786 miles). This is the straight-line distance, which is used to calculate flight times.
Which airlines fly from London to Seattle?
Several airlines operate flights between London and Seattle, 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 London to Seattle?
Based on historical data, February typically offers the lowest airfares for flights from London to Seattle. 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 Seattle?
For the best prices on London to Seattle flights, we recommend booking 116 days in advance. International flights generally require earlier booking than domestic routes.
Do I need a visa to travel from London to Seattle?
Visa requirements depend on your nationality and the purpose of your visit. Citizens of United Kingdom traveling to United States should check the latest visa requirements. Visit our partner site visarequirements.io for detailed visa information.
What is the time difference between London and Seattle?
London operates on Europe/London time zone, while Seattle is in the America/Los_Angeles time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.