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Flights Fare Calendar Find minimum fare between Seattle - Tacoma Intl. and Heathrow Click this button to get previous days data Click this button to get next days data $1,681 $1,441 $1,201 $961 $720 $480 $240 $0 23 24 25 26 27 28 29 30 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 W T F S S M T W T F S S M T W T F S S M T W T F S S M T W T F Price is $1,533 on Icelandair Price is $1,386 on Condor Price is $1,226 on JetBlue Airways Price is $1,027 on Icelandair Price is $1,318 on Icelandair Price is $1,355 on Alaska Airlines Price is $1,392 on Lufthansa Price is $1,245 on Icelandair Price is $1,681 on JetBlue Airways Price is $1,160 on Icelandair Price is $1,075 on Icelandair Price is $993 on Icelandair Price is $910 on Icelandair Price is $1,075 on Icelandair Price is $1,043 on Icelandair Price is $1,265 on Alaska Airlines Price is $943 on Icelandair Price is $993 on Icelandair Price is $910 on Icelandair Price is $993 on Icelandair Price is $1,210 on Icelandair Price is $1,077 on Icelandair Price is $1,127 on Icelandair Price is $1,077 on Icelandair Price is $1,075 on Icelandair Price is $1,093 on Lufthansa Price is $910 on Icelandair Price is $1,044 on Icelandair Price is $965 on Icelandair

Amazing SEA to LHR Flight Deals

The cheapest flights to Heathrow found within the past 7 days were $643 round trip and $473 one way. Prices and availability subject to change. Additional terms may apply.

Flight Schedule for SEA to LHR

Carrier Flight Depart SEA Arrive LHR Thu
6/24
Fri
6/25
Sat
6/26
Sun
6/27
Mon
6/28
Tue
6/29
Wed
6/30
Stops
DL 20 03:15 pm 09:25 am Check fare - Check fare - - Check fare - 0 stop(s)
AA 156 07:15 pm 12:50 pm Check fare Check fare Check fare Check fare Check fare Check fare Check fare 0 stop(s)
BA 48 06:20 pm 11:40 am - Check fare - Check fare Check fare - Check fare 0 stop(s)

Best Heathrow Flight and Hotel Packages

Heathrow flight + hotel packages - economy flights

FAQs about flights from Seattle - Tacoma Intl. Airport (SEA) to Heathrow Airport (LHR)

Can I catch a flight from Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) to London Airport (LHR-Heathrow) right now?

For any present London Airport (LHR-Heathrow) travel advice and quarantine requirements, go to the Covid-19 Travel Advisor. Check before you arrange your flight, so you don't get caught up en route.

Are there direct flights from SEA to London Heathrow?

If you're hoping to journey from Sea-Tac Airport to London Heathrow as swiftly as possible, you'll be glad to know multiple airlines offer direct flights. Choose your preferred seat with British Airways or Virgin Atlantic.

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 London Heathrow, please visit our Customer Service Portal.

How long is the flight from Seattle - Tacoma Intl. Airport (SEA) to LHR?

Feel welcome to stand up and move around during your flight from Sea-Tac Airport to London Heathrow. The flight takes an average of 9 hours and 28 minutes, so exercising your body will keep you feeling comfortable during this long journey.

What is the flight distance from Sea-Tac Airport to LHR?

The flight distance from SEA to Heathrow Airport is 4,785 mi. Apart from cramming your devices with more must-see TV shows, it'll be wise to carry some noise-canceling earbuds and a pullover as well.

What airlines fly from Seattle - Tacoma Intl. Airport (SEA) to London Airport (LHR-Heathrow)?

If you'd prefer to fly direct from SEA to Heathrow Airport (LHR), you've got quite a few options. Below are the top airlines that service this route:

  • British Airways - (BA) with 23 flights every month
  • Virgin Atlantic - (VS) with 65 flights every month
  • American Airlines - (AA) with 43 flights every month
  • Delta - (DL) with 73 flights every month
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 2020. Wednesday and Friday prices are also good, but you may want to prepare your budget if booking on a Sunday, as data shows the end of the week 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 2020, 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 2020 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2 weeks to 2 months prior to their travel dates.

How can I save money on airline tickets?

We'll let you in on a secret...You can save big on flights if you mix and match your airlines and fare types. In fact, travelers who booked flights on Travelocity in 2020 saved nearly 40% when their return flights consisted of two different airlines or fare types.

*According to flight demand on Travelocity.com from January to December 2020. Savings are subject to change based on departure location, date and destination.

Seattle - Tacoma Intl. to Heathrow Flight FAQ

Traveling FromSeattle - Tacoma Intl.
Traveling ToHeathrow
Shortest Flight Time25 hours 20 mins
Earliest Departure Time6:20PM BST
Latest Departure Time7:15PM BST
Lowest Flight Price$643

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

Popular Flight Routes from Seattle (SEA)

Seattle - Tacoma Intl. to Heathrow Flight FAQ

Traveling FromSeattle - Tacoma Intl.
Traveling ToHeathrow
Shortest Flight Time25 hours 20 mins
Earliest Departure Time6:20PM BST
Latest Departure Time7:15PM BST
Lowest Flight Price$643

Popular Flight Routes from London (LHR)

Travelers at LHR love to visit these top cities. Roam to the top destinations from London(LHR) today with the cheap prices from Travelocity!

*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.