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Cheap flights from Seattle to London from $336

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.
Multiple Airlines Logo
2:35 pm - 2:50 pmSEA  Seattle/Tacoma Intl-SEN London Southend
16h 15m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol
Multiple Airlines Logo
7:35 am - 5:00 pmSEN  London Southend-SEA Seattle/Tacoma Intl
17h 25m2 stops Amsterdam Schiphol Reykjavik Keflavik Intl
$1,006Multiple Airlines
Sun, Nov 29 - Tue, Dec 8
Multiple Airlines Logo
2:35 pm - 6:35 pmSEA  Seattle/Tacoma Intl-SEN London Southend
20h 00m2 stops Reykjavik Keflavik Intl Paris Charles de Gaulle
Multiple Airlines Logo
7:10 am - 5:00 pmSEN  London Southend-SEA Seattle/Tacoma Intl
17h 50m2 stops Paris Charles de Gaulle Reykjavik Keflavik Intl
$1,053Multiple Airlines
Wed, Dec 9 - Wed, Dec 23
Multiple Airlines Logo
2:35 pm - 7:20 pmSEA  Seattle/Tacoma Intl-SEN London Southend
20h 45m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol
Multiple Airlines Logo
7:35 am - 5:00 pmSEN  London Southend-SEA Seattle/Tacoma Intl
17h 25m2 stops Amsterdam Schiphol Reykjavik Keflavik Intl
$1,065Multiple Airlines
Tue, Dec 8 - Tue, Dec 15
Multiple Airlines Logo
2:35 pm - 2:50 pmSEA  Seattle/Tacoma Intl-SEN London Southend
16h 15m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol
Multiple Airlines Logo
7:35 am - 5:00 pmSEN  London Southend-SEA Seattle/Tacoma Intl
17h 25m2 stops Amsterdam Schiphol Reykjavik Keflavik Intl
$1,083Multiple Airlines
Sun, Nov 29 - Tue, Dec 8
Multiple Airlines Logo
5:50 pm - 6:55 pmSEA  Seattle/Tacoma Intl-SEN London Southend
17h 05m2 stops Frankfurt am Main Berlin Brandenburg
Multiple Airlines Logo
7:20 am - 3:55 pmSEN  London Southend-SEA Seattle/Tacoma Intl
16h 35m2 stops Berlin Brandenburg Frankfurt am Main
$1,098Multiple Airlines
Thu, Nov 26 - Mon, Nov 30
Multiple Airlines Logo
2:35 pm - 6:35 pmSEA  Seattle/Tacoma Intl-SEN London Southend
20h 00m2 stops Reykjavik Keflavik Intl Paris Charles de Gaulle
Multiple Airlines Logo
7:10 am - 5:00 pmSEN  London Southend-SEA Seattle/Tacoma Intl
17h 50m2 stops Paris Charles de Gaulle Reykjavik Keflavik Intl
$1,156Multiple Airlines
Wed, Dec 9 - Wed, Dec 16
Multiple Airlines Logo
2:35 pm - 10:05 pmSEA  Seattle/Tacoma Intl-SEN London Southend
23h 30m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol
Multiple Airlines Logo
7:15 am - 5:00 pmSEN  London Southend-SEA Seattle/Tacoma Intl
17h 45m2 stops Amsterdam Schiphol Reykjavik Keflavik Intl
$1,176Multiple Airlines
Sat, Feb 13 - Sat, Feb 27
Multiple Airlines Logo
2:35 pm - 7:20 pmSEA  Seattle/Tacoma Intl-SEN London Southend
20h 45m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol
Multiple Airlines Logo
7:35 am - 5:00 pmSEN  London Southend-SEA Seattle/Tacoma Intl
17h 25m2 stops Amsterdam Schiphol Reykjavik Keflavik Intl
$1,181Multiple Airlines
Tue, Dec 8 - Tue, Dec 15
Multiple Airlines Logo
2:35 pm - 6:35 pmSEA  Seattle/Tacoma Intl-SEN London Southend
20h 00m2 stops Reykjavik Keflavik Intl Paris Charles de Gaulle
Multiple Airlines Logo
7:10 am - 5:00 pmSEN  London Southend-SEA Seattle/Tacoma Intl
17h 50m2 stops Paris Charles de Gaulle Reykjavik Keflavik Intl
$1,193Multiple Airlines
Wed, Dec 9 - Wed, Dec 16
Multiple Airlines Logo
2:35 pm - 6:35 pmSEA  Seattle/Tacoma Intl-SEN London Southend
20h 00m2 stops Reykjavik Keflavik Intl Paris Charles de Gaulle
Multiple Airlines Logo
7:10 am - 5:00 pmSEN  London Southend-SEA Seattle/Tacoma Intl
17h 50m2 stops Paris Charles de Gaulle Reykjavik Keflavik Intl
$1,223Multiple Airlines
Wed, Dec 9 - Wed, Dec 16

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Use the filters below to find and compare flights from Seattle to London Southend Airport that are best for you.

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Depart

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Price

Cheapest round-trip
Quickest round-trip

SeattleLondon

SEA Seattle/Tacoma Intl - SEN London Southend

SEASEN

Seattle/Tacoma Intl

Sun 11/29

2:35 pm-2:50 pm

2 stops16h 15m

London Southend

Tue 12/8

7:35 am-5:00 pm

2 stops17h 25m

$1,006

SeattleLondon

SEA Seattle/Tacoma Intl - SEN London Southend

SEASEN

Seattle/Tacoma Intl

Wed 12/9

2:35 pm-6:35 pm

2 stops20h 00m

London Southend

Wed 12/23

7:10 am-5:00 pm

2 stops17h 50m

$1,053

SeattleLondon

SEA Seattle/Tacoma Intl - SEN London Southend

SEASEN

Seattle/Tacoma Intl

Tue 12/8

2:35 pm-7:20 pm

2 stops20h 45m

London Southend

Tue 12/15

7:35 am-5:00 pm

2 stops17h 25m

$1,065

SeattleLondon

SEA Seattle/Tacoma Intl - SEN London Southend

SEASEN

Seattle/Tacoma Intl

Sun 11/29

2:35 pm-2:50 pm

2 stops16h 15m

London Southend

Tue 12/8

7:35 am-5:00 pm

2 stops17h 25m

$1,083

SeattleLondon

SEA Seattle/Tacoma Intl - SEN London Southend

SEASEN

Seattle/Tacoma Intl

Thu 11/26

5:50 pm-6:55 pm

2 stops17h 05m

London Southend

Mon 11/30

7:20 am-3:55 pm

2 stops16h 35m

$1,098

SeattleLondon

SEA Seattle/Tacoma Intl - SEN London Southend

SEASEN

Seattle/Tacoma Intl

Wed 12/9

2:35 pm-6:35 pm

2 stops20h 00m

London Southend

Wed 12/16

7:10 am-5:00 pm

2 stops17h 50m

$1,156

SeattleLondon

SEA Seattle/Tacoma Intl - SEN London Southend

SEASEN

Seattle/Tacoma Intl

Sat 2/13

2:35 pm-10:05 pm

2 stops23h 30m

London Southend

Sat 2/27

7:15 am-5:00 pm

2 stops17h 45m

$1,176

SeattleLondon

SEA Seattle/Tacoma Intl - SEN London Southend

SEASEN

Seattle/Tacoma Intl

Tue 12/8

2:35 pm-7:20 pm

2 stops20h 45m

London Southend

Tue 12/15

7:35 am-5:00 pm

2 stops17h 25m

$1,181

SeattleLondon

SEA Seattle/Tacoma Intl - SEN London Southend

SEASEN

Seattle/Tacoma Intl

Wed 12/9

2:35 pm-6:35 pm

2 stops20h 00m

London Southend

Wed 12/16

7:10 am-5:00 pm

2 stops17h 50m

$1,193

SeattleLondon

SEA Seattle/Tacoma Intl - SEN London Southend

SEASEN

Seattle/Tacoma Intl

Wed 12/9

2:35 pm-6:35 pm

2 stops20h 00m

London Southend

Wed 12/16

7:10 am-5:00 pm

2 stops17h 50m

$1,223

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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When to book flights from Seattle to London Southend Airport

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

Cheap Seattle to London Southend Airport (SEA to SEN) flight deals and tips

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

Best Price Found

$336

Fastest flight time

16h 15m

Direct flights

None
The best one-way flight to London Southend Airport from Seattle in the past 72 hours is $336. The best round-trip flight deal from Seattle to London Southend Airport found on momondo in the last 72 hours is $1,006.
The fastest flight from Seattle to London Southend Airport takes 16h 15m
There are no direct flights from Seattle to London Southend Airport. There are no popular flight routes from Seattle to London Southend Airport.
Search flight deals

Frequently asked questions about flying from Seattle to London Southend Airport

  • How far is Seattle/Tacoma Intl to London Southend by plane?

    There are 4798.7 mi between Seattle/Tacoma Intl and London Southend. Typically, this will take 16h 15m by plane in normal conditions.

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

    Prices for flights from Seattle/Tacoma Intl Airport to London Southend Airport are updated daily.

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to London Southend Airport.

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

    The travel and health documents you'll need for your trip to London Southend 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 Southend Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from Seattle to London Southend Airport

  • How do I get Price Alerts for flights from Seattle to London Southend Airport?

    Confirm your travel details to search for the latest offers for flights from Seattle to London Southend Airport. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Seattle to London Southend Airport with momondo?

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Gatwick
Croydon
Hayes
Haverhill
Milton Keynes
Luton
Stansted
Kingston upon Thames
Dover
Watford
Richmond
Wembley
Crawley
Worthing
Brentford
Harrow
Canterbury
Hook
Southall

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Seattle.

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

momondo does allow users to show only those flights to London from Seattle which offer a flexible booking policy as well as other useful filters and features.

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

momondo provides multiple filters to help you find the best flight to London from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Seattle and alert you when they change.

An easier way to manage your London Southend Airport trip

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