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SEA (Seattle) to LHR (London) Flights $420.76

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Cheap SEA to LHR Flights

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

London

$1044.63

$405.16

$758.16

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

Question : In the next four weeks, what day should you book your trip?
Answer : As of Jul 24th, the cheapest day to fly from Seattle to London is Aug 21st. Tickets are currently being sold for $587, which is 53% below the average price for this route.

Question : If you’re booking SEA to LHR, how many different choices of departure times do you have?
Answer : Depending on the day of the week, the number of flight times will change, but on average there are three. That is lower than the national average of five.

Question : Best case scenario, how quickly can someone get from SEA to LHR?
Answer : British Airways currently holds the shortest travel time with nine hours and 20 minutes. For example, you would arrive in London at 7:05 AM BST if you left Seattle at 1:45 PM PDT. Remember, there is an eight-hour time difference.

Question : Which airline has been on schedule to London Heathrow Airport (LHR) from Seattle-Tacoma International Airport (SEA) the most?
Answer : The current leader is Delta Air Lines with an 88% on-time rate. Spend as little time in an airport as necessary by flying with Delta Air Lines. If they are delayed for some reason though, the average delay is less than half an hour.

Question : Do some days of the week have more flight times than others?
Answer : When you’re flying from SEA to LHR, the day with the most flight times is Saturday, with three different options. Wednesday currently offers the fewest number of flight times with two options.

Question : How does Seattle to London stack up against the rest of the world in overall promptness?
Answer : SEA to LHR currently scores 2 out of a possible 5 stars in promptness. This score combines both the number of delayed flights and total delay minutes. With 2 stars, you should feel rather worried about getting to London on time.

Question : Can you cut down on flight costs by changing the day of the week you travel to London?
Answer : The lowest-cost day to fly in August is Monday. Being flexible with your travel days garners even more savings during booking.