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Cheap Flights from Seattle to London $615.54

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Cheapest Flights from Seattle to London (SEA to LHR)

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Interesting Facts About Flights from Seattle to London (SEA to LHR)

Question : Who's offering the cheapest round-trip flight to London Heathrow Airport (LHR) over the coming months?
Answer : Air Canada is offering the best deal at $542. Better take a look quickly because prices range all the way up to $1,324 over the next three months.

Question : Do travelers from Seattle typically stay in London for very long?
Answer : The average time spent in London by passengers from Seattle is about two weeks.

Question : What's the likelihood of you being delayed on this route?
Answer : The best measurement of overall promptness combines both on-time percentage and total delay minutes. SEA to LHR currently has 4 stars out of 5, earning it one of the best performances in the world. You can fly worry-free on this route.

Question : On a daily basis, how many different flight times are available from Seattle-Tacoma International Airport (SEA) to London Heathrow Airport (LHR)?
Answer : Each day is different, but on average, you can expect to see three available departure times. Compared to the average route departing the United States with five flight times, you won't have as many choices as most.

Question : Would you be willing to change your travel days if it saved you money?
Answer : The cheapest day to fly in April is Monday. Being flexible with your travel days garners even more savings during booking.

Question : What is the likelihood your flight will be delayed for this route?
Answer : Passengers are currently getting to their destination on schedule 84% of the time, which ranks in the top 25% of the world. If a flight is delayed, though, expect an average of less than half an hour added to your flight time.

Question : In the next four weeks, what day should you book your trip?
Answer : Since low prices are preferred, look at Apr 27th. As of Mar 27th, it's showing the cheapest ticket sales at $548. That is 25% below the average price for this route, so you can spend that extra cash on an adventure rather than the flight.