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Cheap flights from Seattle to London from $377

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to London departing on 11/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Seattle to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
SWISS Logo
10:58 am - 8:40 amSEA-LCY
37h 42m2 stops
SWISS Logo
9:20 am - 10:43 pmLCY-SEA
21h 23m2 stops
$622SWISS
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Tue, Feb 10 - Wed, Feb 18
Virgin Atlantic Logo
3:05 pm - 7:35 pmSEA-LCY
20h 30m1 stop
Virgin Atlantic Logo
5:05 pm - 11:50 amLCY-SEA
26h 45m1 stop
$635Virgin Atlantic
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Mon, Dec 8 - Mon, Dec 15
Virgin Atlantic Logo
7:20 am - 7:15 amSEA-LCY
15h 55m2 stops
Virgin Atlantic Logo
5:05 pm - 11:50 amLCY-SEA
26h 45m1 stop
$639Virgin Atlantic
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Tue, Dec 9 - Mon, Dec 15
Delta Logo
3:05 pm - 4:35 pmSEA-LCY
17h 30m1 stop
Delta Logo
8:40 am - 11:50 amLCY-SEA
35h 10m1 stop
$641Delta
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Sun, Dec 7 - Mon, Dec 15
Multiple Airlines Logo
8:10 am - 12:45 pmSEA-LCY
20h 35m2 stops
Multiple Airlines Logo
9:55 am - 12:59 amLCY-SEA
23h 04m2 stops
$655Multiple Airlines
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Sat, Dec 6 - Fri, Feb 6
Multiple Airlines Logo
10:53 am - 12:55 pmSEA-LCY
18h 02m2 stops
Multiple Airlines Logo
9:55 am - 12:50 amLCY-SEA
22h 55m2 stops
$656Multiple Airlines
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Mon, Nov 24 - Fri, Dec 5
Delta Logo
5:35 pm - 4:40 pmSEA-LCY
15h 05m1 stop
Delta Logo
8:40 am - 3:50 pmLCY-SEA
15h 10m1 stop
$664Delta
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Sun, Apr 19 - Thu, Apr 30
Lufthansa Logo
10:05 am - 5:40 pmSEA-LCY
24h 35m2 stops
Lufthansa Logo
9:15 am - 7:18 pmLCY-SEA
18h 03m2 stops
$667Lufthansa
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Wed, Mar 25 - Wed, Apr 8
Lufthansa Logo
3:00 pm - 5:35 pmSEA-LCY
19h 35m1 stop
Lufthansa Logo
9:15 am - 7:18 pmLCY-SEA
18h 03m2 stops
$668Lufthansa
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Tue, Mar 24 - Wed, Apr 1
KLM Logo
2:05 pm - 11:40 amSEA-LCY
13h 35m1 stop
KLM Logo
10:00 am - 3:50 pmLCY-SEA
13h 50m1 stop
$714KLM
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Fri, Apr 24 - Thu, May 7

Virgin Atlantic flights from Seattle to London City Airport

Our best Virgin Atlantic deals on Seattle to London City Airport flight tickets
Virgin Atlantic
Dec 8
SEA3:05 pmSeattle/Tacoma Intl
20h 30m
1 stop
LCY7:35 pmLondon City
Dec 15
LCY5:05 pmLondon City
26h 45m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$635
Find similar
Virgin Atlantic
Dec 9
SEA7:20 amSeattle/Tacoma Intl
15h 55m
2 stops
LCY7:15 amLondon City
Dec 15
LCY5:05 pmLondon City
26h 45m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$639
Find similar
Virgin Atlantic
Feb 8
SEA3:05 pmSeattle/Tacoma Intl
18h 15m
1 stop
LCY5:20 pmLondon City
Feb 18
LCY5:50 pmLondon City
25h 50m
1 stop
SEA11:40 amSeattle/Tacoma Intl
$643
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Delta flights from Seattle to London City Airport

Our best Delta deals on Seattle to London City Airport flight tickets
Delta
Dec 7
SEA3:05 pmSeattle/Tacoma Intl
17h 30m
1 stop
LCY4:35 pmLondon City
Dec 15
LCY8:40 amLondon City
35h 10m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$641
Find similar
Delta
Apr 19
SEA5:35 pmSeattle/Tacoma Intl
15h 05m
1 stop
LCY4:40 pmLondon City
Apr 30
LCY8:40 amLondon City
15h 10m
1 stop
SEA3:50 pmSeattle/Tacoma Intl
$664
Find similar
Delta
Mar 25
SEA4:00 pmSeattle/Tacoma Intl
17h 35m
1 stop
LCY4:35 pmLondon City
Apr 8
LCY9:20 amLondon City
14h 30m
1 stop
SEA3:50 pmSeattle/Tacoma Intl
$665
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to London City Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated October 31, 2025.
Use the filters below to find and compare flights from Seattle to London City Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 2/10

10:58 am-8:40 am

2 stops37h 42m

London City

Wed 2/18

9:20 am-10:43 pm

2 stops21h 23m

$622

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 12/8

3:05 pm-7:35 pm

1 stop20h 30m

London City

Mon 12/15

5:05 pm-11:50 am

1 stop26h 45m

$635

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 12/9

7:20 am-7:15 am

2 stops15h 55m

London City

Mon 12/15

5:05 pm-11:50 am

1 stop26h 45m

$639

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 12/7

3:05 pm-4:35 pm

1 stop17h 30m

London City

Mon 12/15

8:40 am-11:50 am

1 stop35h 10m

$641

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sat 12/6

8:10 am-12:45 pm

2 stops20h 35m

London City

Fri 2/6

9:55 am-12:59 am

2 stops23h 04m

$655

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 11/24

10:53 am-12:55 pm

2 stops18h 02m

London City

Fri 12/5

9:55 am-12:50 am

2 stops22h 55m

$656

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 4/19

5:35 pm-4:40 pm

1 stop15h 05m

London City

Thu 4/30

8:40 am-3:50 pm

1 stop15h 10m

$664

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 3/25

10:05 am-5:40 pm

2 stops24h 35m

London City

Wed 4/8

9:15 am-7:18 pm

2 stops18h 03m

$667

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 3/24

3:00 pm-5:35 pm

1 stop19h 35m

London City

Wed 4/1

9:15 am-7:18 pm

2 stops18h 03m

$668

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Fri 4/24

2:05 pm-11:40 am

1 stop13h 35m

London City

Thu 5/7

10:00 am-3:50 pm

1 stop13h 50m

$714

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Seattle to London City Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Seattle/Tacoma Intl to London City?

SWISS, Lufthansa, and United Airlines are the most popular carriers operating from Seattle/Tacoma Intl to London City

When to book flights from Seattle to London City Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to London City Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to London City Airport (SEA to LCY) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to London City Airport

Direct flights

None
There are no direct flights from Seattle to London City Airport. There are no popular flight routes from Seattle to London City Airport.
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  • How far is Seattle/Tacoma Intl to London City by plane?

    The distance between Seattle/Tacoma Intl and London City is about 4785.6 mi. In terms of flight time, this usually takes a little over 13h 35m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to London City Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to London City Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to London City Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to London City Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to London City Airport.

  • What documentation or ID do you need to fly to London City Airport?

    The travel and health documents you'll need for your trip to London City Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London City Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Seattle to London City Airport?

Best airlines flying from Seattle to London City Airport

Compare and see reviews for airlines that fly from Seattle to London City Airport with momondo
Airline
Rating
Free Cancellation
Price
Scandinavian AirlinesPriceFrom $962Free CancellationRating
7.4
1,548 reviews
Search Scandinavian Airlines flights

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Why use momondo?

Why should I use momondo to find a flight deal from Seattle to London?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to London. momondo saves you time and could save you money on your trip.

Can I find flights from Seattle to London with flexible booking policies on momondo?

Yes. All flights to London from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Seattle to London?

Once you have performed a search for Seattle to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Seattle to London right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Seattle to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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