Cheap Flight Tickets from Seattle (SEA) to London (LHR), Starting at $275

Good to Know: Cheapest and Fastest SEA - LHR Flights

Useful information for finding best airline tickets from Seattle Tacoma International to London Heathrow on your next trip.

Cheapest Round Trip Flight

$275

DL Delta Airlines • 1 stop • 21h 40m

Jun 23 – Jul 09

The cheapest round trip flight from Seattle to London (SEA-LHR-SEA) is currently $275

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Cheapest Direct Flight

$275

AS Alaska Airlines • nonstop • 15h 20m

Jun 23

The cheapest nonstop flight from Seattle to London (SEA-LHR) is currently $275

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Fastest Flight

15h 20m

The fastest nonstop flight from Seattle to London (SEA-LHR) takes 15h 20m

Top Airlines Flying from Seattle to London

Delta Airline, DL

Delta Airlines

United Airlines, UA

United Airlines

American Airlines, AA

American Airlines

Alaska Airlines -AS

Alaska Airlines

Latest Flight Deals from Seattle (SEA) to London (LHR)

Compare and book low fare round-trip air tickets from Seattle to London. Ideal for travelers with confirmed return itineraries.

Jun 23 - Jul 09, Economy
DL
Seattle → London
21h 40m
1:30 PM - 10:30 AM • 1 stop
DL
Seattle → London
23h 45m
9:55 AM - 4:20 PM • 1 stop
$275
Delta Airlines
Jun 23 - Jul 09, Economy
UA
Seattle → London
30h 35m
10:45 AM - 1:20 PM • 1 stop
UA
Seattle → London
25h 59m
9:00 AM - 4:59 PM • 1 stop
$275
United Airlines
Jun 23 - Jul 09, Economy
DL
Seattle → London
20h 5m
5:45 PM - 1:50 PM • 1 stop
DL
Seattle → London
17h
11:40 AM - 2:00 PM • nonstop
$275
Delta Airlines
Jun 23 - Jul 09, Economy
DL
Seattle → London
23h 55m
2:30 PM - 1:05 PM • 1 stop
DL
Seattle → London
20h 35m
11:45 AM - 4:20 PM • 1 stop
$275
Delta Airlines
Jun 23 - Jul 09, Economy
DL
Seattle → London
22h 10m
1:30 PM - 11:00 AM • 1 stop
DL
Seattle → London
20h 35m
11:45 AM - 4:20 PM • 1 stop
$275
Delta Airlines
Jun 23 - Jul 09, Economy
UA
Seattle → London
22h 20m
1:00 PM - 10:40 AM • 1 stop
UA
Seattle → London
23h 29m
10:50 AM - 4:59 PM • 1 stop
$376
United Airlines

Fly from Seattle to London with the Best Airfare Deals on FareLeaders

Looking for a cheap last-minute deal or the best round-trip flight from Seattle to London? Find the biggest savings on one-way and round-trip tickets right here.

FAQs on Seattle to London Flights

What are the airports in Seattle?
SEA
What’s the most popular airline flying from SEA to LHR?
The most popular airline flying from Seattle to London are
Can I fly from SEA to LHR non-stop?
Yes, you can fly SEA to LHR non-stop on
Which airlines fly nonstop between Seattle and London?
The non-stop flights between Seattle and London are .
What’s the earliest departure time from SEA to LHR Airport?
The earliest flight leaves SEA at 10:45 am and lands in LHR - London Heathrow
What are the airports in London?
LHR
Can I make changes to my Seattle to London flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from SEA to LHR?
Read the fare rules of the Seattle to London air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from Seattle and London?
operate flights between Seattle and London
How long does a flight from Seattle to London take?
It takes approximately 10 hour to fly non-stop from SEA to LHR, which is 4800.22 miles by air.
Which airlines provide the cheapest flights from Seattle (SEA) to London (LHR) ?
In the past couple of days, the cheapest tickets to LHR from SEA were found on DL : USD 275
Do I need a passport to fly between SEA and LHR?
Yes
What’s the latest departure time from SEA to LHR ?
The last flight leaves SEA at 9:45 pm

Seattle (SEA) to London (LHR): Airport Information

Origin Airport Seattle Tacoma International , Seattle, US
Destination Airport London Heathrow , London, GB
Distance 4800 miles

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