Cheap Flights From Seattle - Tacoma Intl. (SEA) To Heathrow (LHR)

Wander Wisely with exceptional service, 24/7 supportS’ouvre dans une nouvelle fenêtre

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Find The Best Dates To Fly

Cheapest Flights from Seattle (SEA) to London (LHR)

The cheapest flights to Heathrow found within the past 7 days were CA $857 round trip and CA $351 one way. Prices and availability subject to change. Additional terms may apply.

Mon., 3 Mar. - Wed., 19 Mar.
SEA
Seattle
LHR
London
CA $857 Aller-retour, Trouvé il y a 1 jour
CA $857
Aller-retour
Trouvé il y a 1 jour
Sélectionner le vol Virgin Atlantic depuis Seattle vers London, avec un départ le Mon., 3 Mar. et un retour le Wed., 19 Mar., au prix de CA $857 – Trouvé il y a 1 jour
Thu., 6 Mar. - Thu., 13 Mar.
SEA
Seattle
LHR
London
CA $877 Aller-retour, Trouvé il y a 5 jours
CA $877
Aller-retour
Trouvé il y a 5 jours
Sélectionner le vol Icelandair depuis Seattle vers London, avec un départ le Thu., 6 Mar. et un retour le Thu., 13 Mar., au prix de CA $877 – Trouvé il y a 5 jours
Wed., 5 Mar. - Wed., 12 Mar.
SEA
Seattle
LHR
London
CA $884 Aller-retour, Trouvé il y a 1 jour
CA $884
Aller-retour
Trouvé il y a 1 jour
Sélectionner le vol Delta depuis Seattle vers London, avec un départ le Wed., 5 Mar. et un retour le Wed., 12 Mar., au prix de CA $884 – Trouvé il y a 1 jour
Tue., 11 Feb. - Mon., 3 Mar.
SEA
Seattle
LHR
London
CA $900 Aller-retour, Trouvé il y a 5 jours
CA $900
Aller-retour
Trouvé il y a 5 jours
Sélectionner le vol Virgin Atlantic depuis Seattle vers London, avec un départ le Tue., 11 Feb. et un retour le Mon., 3 Mar., au prix de CA $900 – Trouvé il y a 5 jours
Tue., 25 Feb. - Tue., 4 Mar.
SEA
Seattle
LHR
London
CA $902 Aller-retour, Trouvé il y a 3 jours
CA $902
Aller-retour
Trouvé il y a 3 jours
Sélectionner le vol American Airlines depuis Seattle vers London, avec un départ le Tue., 25 Feb. et un retour le Tue., 4 Mar., au prix de CA $902 – Trouvé il y a 3 jours
Mon., 20 Oct. - Wed., 29 Oct.
SEA
Seattle
LHR
London
CA $909 Aller-retour, Trouvé il y a 1 jour
CA $909
Aller-retour
Trouvé il y a 1 jour
Sélectionner le vol Lufthansa depuis Seattle vers London, avec un départ le Mon., 20 Oct. et un retour le Wed., 29 Oct., au prix de CA $909 – Trouvé il y a 1 jour
Mon., 3 Mar. - Wed., 19 Mar.
SEA
Seattle
LHR
London
CA $969 Aller-retour, Trouvé il y a 1 jour
CA $969
Aller-retour
Trouvé il y a 1 jour
Sélectionner le vol JetBlue Airways depuis Seattle vers London, avec un départ le Mon., 3 Mar. et un retour le Wed., 19 Mar., au prix de CA $969 – Trouvé il y a 1 jour
Tue., 11 Mar. - Tue., 25 Mar.
SEA
Seattle
LHR
London
CA $990 Aller-retour, Trouvé il y a 10 heures
CA $990
Aller-retour
Trouvé il y a 10 heures
Sélectionner le vol Air Canada depuis Seattle vers London, avec un départ le Tue., 11 Mar. et un retour le Tue., 25 Mar., au prix de CA $990 – Trouvé il y a 10 heures
Fri., 7 Feb. - Fri., 14 Feb.
SEA
Seattle
LHR
London
CA $1,015 Aller-retour, Trouvé il y a 6 jours
CA $1,015
Aller-retour
Trouvé il y a 6 jours
Sélectionner le vol British Airways depuis Seattle vers London, avec un départ le Fri., 7 Feb. et un retour le Fri., 14 Feb., au prix de CA $1,015 – Trouvé il y a 6 jours
Mon., 4 Aug. - Wed., 27 Aug.
SEA
Seattle
LHR
London
CA $1,079 Aller-retour, Trouvé il y a 5 jours
CA $1,079
Aller-retour
Trouvé il y a 5 jours
Sélectionner le vol Swiss International Air Lines depuis Seattle vers London, avec un départ le Mon., 4 Aug. et un retour le Wed., 27 Aug., au prix de CA $1,079 – Trouvé il y a 5 jours

Foire aux questions

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.
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 is the best day to buy a plane ticket?
Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you’re looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you’re browsing flight deals.
What are the cheapest days to fly?
Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.
How far in advance can you book a flight?
Here’s the deal: It is typically possible to start comparing international airfares on Travelocity.ca 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 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.
*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.