Direct (non-stop) flights from SeaTac (SEA) to London (LHR)
Find comprehensive flight information, schedules, and booking details for direct flights from SeaTac (SEA), US to London (LHR), GB. This popular route is operated by 3 airlines, offering multiple daily departures.• 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)
SeaTac (SEA)
US
London (LHR)
GB
FLIGHT TIME
9h 15m - 10h 50m
FLIGHT DISTANCE
4812 miles (7743 km)
9h 30m - 9h 42m
16:48
19:20
4812 miles (7743 km)
March
3 (Show)
21
Terminal 1 (SeaTac (SEA))
Terminal 3 (London (LHR))
Flight Schedule
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Airlines Operating This Route
Delta Air Lines (DL), British Airways (BA), Virgin Atlantic (VS)
Click any airline to view their specific flight schedules, policies, and route details for this connection. You can also explore flights from SeaTac (SEA) and flights to London (LHR).
Route Insights
Route Demand
With 21 weekly flights, this route maintains steady demand throughout the week, providing travelers with frequent scheduling options.
Route Importance
Multiple airlines compete on this route (3 carriers), indicating its significance in connecting Seattle (SEA) and London (LHR). This competition often leads to competitive pricing and multiple daily departure options.
Best Time to Fly
Best Value Period
March typically offers the best value for travelers, with lower average fares compared to peak travel periods.
Price Trends
Price variation throughout the year is significant, with Mar being the most affordable month and prices increasing during peak travel seasons.
Distance & Duration Explained
Route Distance
At 4812 miles (7743 km), this is an ultra-long-haul route between Seattle (SEA) and London (LHR), requiring larger aircraft and extended flight times.
Flight Duration
Flight duration averages 9h 15m - 10h 50m, with actual times ranging from 9h 30m - 9h 42m depending on aircraft type, wind conditions, and routing.
Airline Comparison
Available Airlines
Travelers have 3 airline options on this route: Delta Air Lines, British Airways, Virgin Atlantic. Each airline offers different schedules, pricing, and service levels to meet various travel needs.
Flight Frequency
Delta Air Lines operates the most flights on this route with 1 daily departure, followed by British Airways and Virgin Atlantic.
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Best Time to Visit & Travel Planning
Cheapest Day
Cheapest Month
Average Fare
$661
Travel Planning Tips for SeaTac (SEA) to London (LHR)
- Best Day to Book
Monday typically offers the lowest fares for flights from SeaTac (SEA) to London (LHR). Consider booking on this day for potential savings.
- Best Month to Travel
January is generally the cheapest month to fly from SeaTac (SEA) to London (LHR). Plan your trip during this month for the best deals.
- Average Flight Price
The average fare for flights from SeaTac (SEA) to London (LHR) is approximately $661. Prices may vary based on booking time, season, and airline.
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Related Pages
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Frequently Asked Questions
How many flights operate from Seattle (SEA) to London (LHR)?
There are 3 direct flights operating from Seattle (SEA) to London (LHR). Approximately 2-4 flights daily.
Which airlines operate flights from Seattle (SEA) to London (LHR)?
3 airlines operate on this route: Delta Air Lines, British Airways, Virgin Atlantic.
How long is the flight from Seattle (SEA) to London (LHR)?
The flight duration from Seattle (SEA) to London (LHR) is approximately 9h 15m - 10h 50m.
What is the distance from Seattle (SEA) to London (LHR)?
The distance from Seattle (SEA) to London (LHR) is 4812 miles (7743 km).
What is the flight time range for this route?
Flight times on this route range from 9h 30m - 9h 42m.
What are the earliest and latest flight departure times?
The earliest flight departs at 16:48 and the latest flight departs at 19:20.
What is the cheapest month to fly from Seattle (SEA) to London (LHR)?
March is typically the cheapest month to fly on this route.
How many flights operate per week on this route?
Approximately 21 flights operate per week from Seattle (SEA) to London (LHR).
What types of aircraft operate on this route?
This route is served by Airbus A330-200, Boeing 777-300ER, Boeing 787-9.
What is the average flight price from Seattle (SEA) to London (LHR)?
The average flight price for a round-trip ticket from Seattle (SEA) to London (LHR) is approximately $856 USD. Prices can vary based on booking time, season, and airline.
When is the best time to book flights from Seattle (SEA) to London (LHR) for the lowest prices?
March is typically the cheapest month to fly from Seattle (SEA) to London (LHR). Booking in advance and avoiding peak travel seasons can help you find better deals.
How many airlines offer flights from Seattle (SEA) to London (LHR)?
3 airlines offer direct flights from Seattle (SEA) to London (LHR), providing travelers with multiple options for scheduling and pricing.
How far is London (LHR) from Seattle (SEA)?
The distance from Seattle (SEA) to London (LHR) is 4812 miles (7743 km). This is a long-haul flight route.
How long does it take to fly from Seattle (SEA) to London (LHR)?
The flight time from Seattle (SEA) to London (LHR) is approximately 9h 15m - 10h 50m. Actual flight duration may vary based on weather conditions, aircraft type, and routing.
What city does London (LHR) serve?
London (LHR) serves London, GB.