NZ$631 Cheap Flights Seattle to London (SEA-LHR)

View NZ$631 flight on Mon, 20 Oct 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Heathrow Airport (LHR)

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

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Sun, 26 Oct - Tue, 11 Nov
SEA
Seattle
LHR
London
NZ$955 Return, found 6 days ago
NZ$955
Return
found 6 days ago
Select Icelandair flight, departing Sun, 26 Oct from Seattle to London, returning Tue, 11 Nov, priced at NZ$955 found 6 days ago
Delta
Sun, 26 Oct - Tue, 11 Nov
SEA
Seattle
LHR
London
NZ$1,043 Return, found 6 days ago
NZ$1,043
Return
found 6 days ago
Select Delta flight, departing Sun, 26 Oct from Seattle to London, returning Tue, 11 Nov, priced at NZ$1,043 found 6 days ago
Virgin Atlantic
Sun, 26 Oct - Tue, 11 Nov
SEA
Seattle
LHR
London
NZ$1,053 Return, found 6 days ago
NZ$1,053
Return
found 6 days ago
Select Virgin Atlantic flight, departing Sun, 26 Oct from Seattle to London, returning Tue, 11 Nov, priced at NZ$1,053 found 6 days ago
Virgin Atlantic
Sun, 26 Oct - Tue, 11 Nov
SEA
Seattle
LHR
London
NZ$1,091 Return, found 6 days ago
NZ$1,091
Return
found 6 days ago
Select Virgin Atlantic flight, departing Sun, 26 Oct from Seattle to London, returning Tue, 11 Nov, priced at NZ$1,091 found 6 days ago
Air Canada
Sun, 26 Oct - Tue, 11 Nov
SEA
Seattle
LHR
London
NZ$1,091 Return, found 6 days ago
NZ$1,091
Return
found 6 days ago
Select Air Canada flight, departing Sun, 26 Oct from Seattle to London, returning Tue, 11 Nov, priced at NZ$1,091 found 6 days ago
Lufthansa
Sun, 26 Oct - Tue, 11 Nov
SEA
Seattle
LHR
London
NZ$1,092 Return, found 6 days ago
NZ$1,092
Return
found 6 days ago
Select Lufthansa flight, departing Sun, 26 Oct from Seattle to London, returning Tue, 11 Nov, priced at NZ$1,092 found 6 days ago
KLM
Sun, 26 Oct - Tue, 11 Nov
SEA
Seattle
LHR
London
NZ$1,132 Return, found 6 days ago
NZ$1,132
Return
found 6 days ago
Select KLM flight, departing Sun, 26 Oct from Seattle to London, returning Tue, 11 Nov, priced at NZ$1,132 found 6 days ago
British Airways
Sun, 26 Oct - Tue, 11 Nov
SEA
Seattle
LHR
London
NZ$1,139 Return, found 6 days ago
NZ$1,139
Return
found 6 days ago
Select British Airways flight, departing Sun, 26 Oct from Seattle to London, returning Tue, 11 Nov, priced at NZ$1,139 found 6 days ago
United
Thu, 26 Mar - Tue, 31 Mar
SEA
Seattle
LHR
London
NZ$1,318 Return, found 6 days ago
NZ$1,318
Return
found 6 days ago
Select United flight, departing Thu, 26 Mar from Seattle to London, returning Tue, 31 Mar, priced at NZ$1,318 found 6 days ago
Aer Lingus
Mon, 6 Oct - Mon, 20 Oct
SEA
Seattle
LHR
London
NZ$1,358 Return, found 4 days ago
NZ$1,358
Return
found 4 days ago
Select Aer Lingus flight, departing Mon, 6 Oct from Seattle to London, returning Mon, 20 Oct, priced at NZ$1,358 found 4 days ago
Flight from Seattle to London route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Heathrow
Return price
NZ$955
Distance
7657 km
Average flight time
17 hours 33 mins

Perfect flights from Seattle to London

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from Seattle to London. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Seattle - Tacoma Intl. to Heathrow ticket options cater to your travel preferences, with incredible one-way fares from NZ$631 and roundtrip prices from NZ$955. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at Heathrow and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in London.

Frequently asked questions

How much is a flight from Sea-Tac Airport to Heathrow Airport (LHR)?
If you're travelling between SEA and London Heathrow, round-trip journeys start from NZ$955. This price is based on fares listed within the last 7 days on Expedia for flights departing within the next year, so don't delay. Book today and save yourself money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from SEA to Heathrow Airport?
The majority of flights can be cancelled online, but whether you are charged a fee all comes down to your airline. If you do need to cancel your trip, follow the instructions in the Customer Service Portal.
How do I find cheap flights from Seattle - Tacoma Intl. Airport (SEA) to LHR that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Seattle - Tacoma Intl. Airport (SEA) to London Heathrow flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Seattle - Tacoma Intl. Airport (SEA) to Heathrow Airport?
With a flight distance of 7 700 kilometres between Sea-Tac Airport and Heathrow Airport (LHR), this is a long trip. Be sure to drink plenty of water and go for a short walk down the aisle every now and then.
Which airlines fly direct from SEA to Heathrow Airport (LHR)?
It's easy to fly directly from Sea-Tac Airport to Heathrow Airport. Below are the most sought-after carriers that offer nonstop services on this route:

  • Virgin Atlantic - (VS) with 30 monthly flights
  • American Airlines - (AA) with 30 monthly flights
  • British Airways - (BA) with 30 monthly flights
  • Delta Air Lines - (DL) with 17 monthly flights

Are SEA to LHR flight tickets cheaper when they're purchased at the last minute?
Flight prices are constantly going up and down, so there are no guarantees. While last-minute deals between Seattle - Tacoma Intl. Airport (SEA) and Heathrow Airport are of course possible, it's also a good idea to keep track of prices well before you fly. In fact, some airlines announce their prices up to a year prior to the departure date. Expedia is constantly updating the best bargains around, so keep checking back and be ready to lock in your seat when the price dips.

Explore a world of travel with Expedia

London Flight Deals

London

Seattle to Gatwick
NZ$948.00
*Available to Expedia members.