Skip to main content
Beginning of main content

LHR (London) to SEA (Seattle) Flights $510.6

Search over 321,000 hotels worldwide and 400 airlines worldwide.
Secure incredible value with Expedia's Price Guarantee.
No Expedia cancellation fee to change or cancel almost any hotel reservation.

Cheap LHR to SEA Flights

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

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

Question : How many departure times from London Heathrow Airport (LHR) to Seattle-Tacoma International Airport (SEA) are there on a daily basis?
Answer : Of course the day matters, but on average, two different flight times exist when you fly from LHR to SEA. You'll have the same number of choices on this route as most others departing the United Kingdom.

Question : What day in the next four weeks has the best fares?
Answer : Aug 7th has seen bookings (as of Jul 17th) as cheap as $913. That comes in 43% below the average price for this route. Saving on flight fares means you'll have more cash to spend on your trip.

Question : Which airline has been the most dependable in getting passengers to their destination on time?
Answer : Delta Air Lines will have you to SEA on time 97% of the time. Don't spend more time waiting in an airport than you have to and stick with Delta Air Lines on this route. If they do have a delay, it usually lasts only six minutes.

Question : How does London to Seattle stack up against the rest of the world in overall promptness?
Answer : The best measurement of overall promptness combines both on-time percentage and total delay minutes. LHR to SEA currently has 3 stars out of 5, an average score at best.

Question : Best case scenario, how quickly can someone get from LHR to SEA?
Answer : British Airways can get you there in nine hours and 50 minutes. So, if you were to leave London at 8:45 AM BST, you would arrive in Seattle at 10:35 AM PDT (remember, there is a time change of eight hours).

Question : How often is the London Heathrow Airport (LHR) to Seattle-Tacoma International Airport (SEA) route delayed?
Answer : Passengers are currently getting to their destination on schedule 78% of the time, which ranks in the 59th percentile worldwide. If a flight is delayed, though, expect an average of 22 minutes added to your flight time.

Question : How long will the flight typically be from London Heathrow Airport (LHR) to Seattle-Tacoma International Airport (SEA)?
Answer : The average flight duration between LHR and SEA is 10 hours and three minutes.