Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Seattle to London from $342

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 10/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Seattle to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
SWISS Logo
7:00 am - 12:35 pm
SEA
-
LCY
21h 35m
2 stops
SWISS Logo
9:15 am - 6:32 pm
LCY
-
SEA
17h 17m
2 stops
$872SWISS
Mon, Aug 17 - Wed, Aug 19
SWISS Logo
10:45 am - 6:40 pm
SEA
-
LCY
23h 55m
2 stops
SWISS Logo
9:15 am - 6:32 pm
LCY
-
SEA
17h 17m
2 stops
$879SWISS
Mon, Aug 17 - Tue, Aug 25
KLM Logo
1:50 pm - 9:30 am
SEA
-
LCY
11h 40m
1 stop
KLM Logo
10:00 am - 4:35 pm
LCY
-
SEA
14h 35m
1 stop
$880KLM
Mon, Sep 14 - Thu, Oct 15
KLM Logo
1:45 pm - 9:30 am
SEA
-
LCY
11h 45m
1 stop
KLM Logo
9:20 am - 4:35 pm
LCY
-
SEA
15h 15m
1 stop
$881KLM
Tue, Oct 6 - Wed, Oct 21
Virgin Atlantic Logo
6:00 am - 8:50 am
SEA
-
LCY
18h 50m
2 stops
Virgin Atlantic Logo
10:00 am - 4:35 pm
LCY
-
SEA
14h 35m
1 stop
$884Virgin Atlantic
Tue, Sep 29 - Tue, Oct 13
Virgin Atlantic Logo
2:30 pm - 5:20 pm
SEA
-
LCY
18h 50m
2 stops
Virgin Atlantic Logo
8:25 am - 8:47 pm
LCY
-
SEA
20h 22m
2 stops
$885Virgin Atlantic
Sun, Oct 4 - Wed, Oct 21
SWISS Logo
1:16 pm - 5:25 pm
SEA
-
LCY
20h 09m
2 stops
SWISS Logo
9:15 am - 6:32 pm
LCY
-
SEA
17h 17m
2 stops
$886SWISS
Wed, Sep 16 - Wed, Sep 23
SWISS Logo
7:00 am - 8:40 am
SEA
-
LCY
17h 40m
2 stops
SWISS Logo
9:15 am - 6:32 pm
LCY
-
SEA
17h 17m
2 stops
$887SWISS
Tue, Sep 15 - Tue, Sep 29
Virgin Atlantic Logo
2:35 pm - 5:20 pm
SEA
-
LCY
18h 45m
1 stop
Virgin Atlantic Logo
8:40 am - 8:27 pm
LCY
-
SEA
19h 47m
2 stops
$890Virgin Atlantic
Tue, Nov 10 - Tue, Nov 17
SWISS Logo
7:00 am - 5:30 pm
SEA
-
LCY
26h 30m
2 stops
SWISS Logo
7:15 pm - 6:32 pm
LCY
-
SEA
31h 17m
2 stops
$891SWISS
Mon, Sep 14 - Mon, Sep 21

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Delta flights from Seattle to London City Airport

Our best Delta deals on Seattle to London City Airport flight tickets
Delta
Aug 10
SEA1:50 pmSeattle/Tacoma Intl
11h 40m
1 stop
LCY9:30 amLondon City
Aug 19
LCY10:00 amLondon City
33h 37m
1 stop
SEA11:37 amSeattle/Tacoma Intl
$929
Delta
Aug 10
SEA7:15 amSeattle/Tacoma Intl
17h 35m
2 stops
LCY8:50 amLondon City
Aug 19
LCY10:00 amLondon City
31h 37m
2 stops
SEA9:37 amSeattle/Tacoma Intl
$950
Delta
Jun 24
SEA5:45 pmSeattle/Tacoma Intl
14h 55m
1 stop
LCY4:40 pmLondon City
Jul 1
LCY9:20 amLondon City
15h 00m
1 stop
SEA4:20 pmSeattle/Tacoma Intl
$1,391

Lufthansa flights from Seattle to London City Airport

Our best Lufthansa deals on Seattle to London City Airport flight tickets
Lufthansa
Sep 14
SEA2:10 pmSeattle/Tacoma Intl
19h 45m
1 stop
LCY5:55 pmLondon City
Sep 24
LCY9:15 amLondon City
15h 44m
2 stops
SEA4:59 pmSeattle/Tacoma Intl
$919
Lufthansa
Sep 14
SEA2:10 pmSeattle/Tacoma Intl
19h 45m
1 stop
LCY5:55 pmLondon City
Sep 24
LCY9:15 amLondon City
15h 44m
2 stops
SEA4:59 pmSeattle/Tacoma Intl
$920
Lufthansa
Sep 14
SEA2:10 pmSeattle/Tacoma Intl
19h 45m
1 stop
LCY5:55 pmLondon City
Oct 6
LCY6:30 pmLondon City
25h 50m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$932

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 June 18, 2026.
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

Cheapest round-trip

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 8/17

7:00 am-12:35 pm

2 stops21h 35m

London City

Wed 8/19

9:15 am-6:32 pm

2 stops17h 17m

$872

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 8/17

10:45 am-6:40 pm

2 stops23h 55m

London City

Tue 8/25

9:15 am-6:32 pm

2 stops17h 17m

$879
Quickest round-trip

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 9/14

1:50 pm-9:30 am

1 stop11h 40m

London City

Thu 10/15

10:00 am-4:35 pm

1 stop14h 35m

$880

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 10/6

1:45 pm-9:30 am

1 stop11h 45m

London City

Wed 10/21

9:20 am-4:35 pm

1 stop15h 15m

$881

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 9/29

6:00 am-8:50 am

2 stops18h 50m

London City

Tue 10/13

10:00 am-4:35 pm

1 stop14h 35m

$884

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Sun 10/4

2:30 pm-5:20 pm

2 stops18h 50m

London City

Wed 10/21

8:25 am-8:47 pm

2 stops20h 22m

$885

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Wed 9/16

1:16 pm-5:25 pm

2 stops20h 09m

London City

Wed 9/23

9:15 am-6:32 pm

2 stops17h 17m

$886

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 9/15

7:00 am-8:40 am

2 stops17h 40m

London City

Tue 9/29

9:15 am-6:32 pm

2 stops17h 17m

$887

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Tue 11/10

2:35 pm-5:20 pm

1 stop18h 45m

London City

Tue 11/17

8:40 am-8:27 pm

2 stops19h 47m

$890

SeattleLondon

SEA - LCY

SEALCY

Seattle/Tacoma Intl

Mon 9/14

7:00 am-5:30 pm

2 stops26h 30m

London City

Mon 9/21

7:15 pm-6:32 pm

2 stops31h 17m

$891

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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?

Delta and KLM 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

Fastest flight time

11h 45m

Direct flights

None
The fastest flight from Seattle to London City Airport takes 11h 45m
There are no direct flights from Seattle to London City Airport. There are no popular flight routes from Seattle to London City Airport.
Search flight deals

Frequently asked questions about flying from Seattle to London City Airport

  • 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 11h 45m.

  • 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 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.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Milton Keynes
Luton
Dover
Hayes
Crawley
Croydon
Wembley
Stansted
Harrow
Slough
Brentwood
Watford
Cobham
Guildford
Ilford
Folkestone
Uxbridge
Romford

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.

An easier way to manage your London City Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 7/18
Sat 7/25
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to London

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
Flights to London Heathrow Airportfrom $469
Flights to London Gatwick Airportfrom $379
Flights to London Stansted Airportfrom $508
Flights to London Luton Airportfrom $505
Flights to Glasgow Intl Airportfrom $530
Flights to London Southend Airportfrom $581
Flights to Belfast Intl Airportfrom $711
Flights to Belfast City Airportfrom $711