$281 Cheap Flights from Seattle to London

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Find The Best Dates To Fly from Seattle - Tacoma Intl. to Heathrow

Amazing SEA to LHR Flight Deals

The cheapest flights to Heathrow found within the past 7 days were $496 round trip and $281 one way. Prices and availability subject to change. Additional terms may apply.

Flight Schedule for SEA to LHR

CarrierFlightDepart SEAArrive LHRSat
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Stops
VS10602:10 pm07:35 amCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops
BA4806:35 pm11:50 amCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
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AA15607:49 pm01:10 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
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DL2007:05 pm00:50 pm
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Frequently asked questions

Can I catch a flight from Seattle - Tacoma Intl. Airport (SEA) to London Heathrow right now?
It’s prudent to know about any quarantine requirements and travel advice reports in effect in your destination. Be sure to visit the Covid-19 Travel Advisor for up-to-date info on booking a flight to Heathrow Airport.
Are there direct flights from Seattle - Tacoma Intl. Airport (SEA) to Heathrow Airport (LHR)?
Sometimes, travel is all about the journey; sometimes the magic is in the destination. But if you just want to get to where you’re headed fast, multiple airlines have direct flights from Seattle - Tacoma Intl. Airport (SEA) to LHR, including Virgin Atlantic and American Airlines.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Heathrow Airport (LHR), please visit our Customer Service Portal.
How long is the flight from SEA to Heathrow Airport?
It takes a fair amount of time to get from Seattle to London, about 9 hours and 28 minutes in total. Be sure to bring a quality travel pillow and wear comfortable shoes and clothing for this long-distance flight.
What is the flight distance from Seattle - Tacoma Intl. Airport (SEA) to Heathrow Airport?
From SEA to London Heathrow, the flight distance is 4,800 mi. It’s a lengthy journey, so be sure to pack all the carry-on essentials. Some compression tights and warm clothes are fantastic items to start with.
What airlines fly from Sea-Tac Airport to London Heathrow?
With a few airlines operating direct flights from Sea-Tac Airport to LHR, you shouldn’t have a problem finding that perfect fare. Below are some of the most reliable air carriers:

  • Virgin Atlantic - (VS) with 30 flights every month
  • American Airlines - (AA) with 30 flights every month
  • British Airways - (BA) with 30 flights every month
  • Delta - (DL) with 4 flights every month

What airlines have practices regarding COVID-19 in place and use social distancing?
From the moment you enter the departure terminal to when you leave the arrivals terminal, if you’re flying with British Airways, Virgin Atlantic or SAS you can be sure that COVID-19 measures and social distancing rules have been adhered to. Many airlines have introduced capped capacity flights and keeping the middle seat empty.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

 

Traveling From Seattle - Tacoma Intl.
Traveling To Heathrow
Shortest Flight Time 25 hours 15 mins
Earliest Departure Time 2:10PM GMT
Latest Departure Time 7:49PM GMT
Lowest Flight Price $496

Route Info

Flight path for flights from Seattle-Tacoma International Airport to London Heathrow Airport

Distance:
5,889.00 miles

Airlines & Aircraft Used on SEA to LHR Flight Routes

Airline Carrier
Aircraft
Jet Airways (India)
Aerospatiale/Alenia ATR 42/ ATR 72
Jet Airways (India)
Boeing 777-300 pax
United Airlines
Antonov AN-24

Discover our best flights from Seattle SEA to London LHR. 

With 3 airlines to choose from on Travelocity, you can easily find the best option for you. Use our filters to sort by price, compare airlines, and find the most convenient flight times. 

 

Find our best return flights from Seattle SEA to London LHR at the right price  

Airfares to London LHR from Seattle SEA currently cost between $496 and $588. It’s usually cheaper to book a round trip than two separate one-way flights. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way flights from Seattle SEA to London LHR 

If you want to be flexible about when you return, or keep your travel options open ended, a one-way flight could be just the ticket! You’ll find one-way airfares from Seattle SEA to London LHR on Travelocity starting at $281. Prices and availability subject to change. Additional terms may apply. 

 

Get to London LHR from Seattle SEA quicker with direct flights. 

Get to London faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to LHR from SEA to take around 25 hour(s) 15 min(s).  

 

Find our cheapest airfares for flights from Seattle SEA to London LHR

Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to LHR from SEA. Our Price Match Promise means if you find a lower rate on Travelocity.com or on another US-based website within 24 hours of booking, we’ll credit or refund the difference.  

 

Get our best airfare deals for your flight from Seattle SEA to London LHR today 

If you’re flexible about when you travel, February is usually the cheapest month to fly from Seattle SEA to London LHR. If you need to be more specific, search by date and arrival and departure times.Then, compare prices across different airlines, and sort results by lowest price first. 

 

Book flexible airline tickets for flights to London LHR from Seattle SEA 

Some airlines let you change your travel dates without charging a fee. Use our ‘no change fee’ filter to see which flights to LHR from SEA have this option.  

 

Travel with confidence when you book flights to London LHR from Seattle SEA with Travelocity 

We’ve secured fantastic deals with all the main airline carriers and it’s easy to compare, choose, and book with Travelocity. With 24/7 customer service and our free 'App', we’ll always keep you moving. 

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.