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Cheap flights from Washington to London from $328

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to London departing on 10/21. 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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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:40 pm - 4:40 pm
SEA
-
SEN
17h 00m
2 stops
Multiple Airlines Logo
12:15 pm - 8:40 pm
SEN
-
SEA
16h 25m
2 stops
$904Multiple Airlines
Wed, Aug 19 - Wed, Aug 26
Multiple Airlines Logo
3:40 pm - 7:20 pm
SEA
-
SEN
19h 40m
2 stops
Multiple Airlines Logo
11:10 am - 8:40 pm
SEN
-
SEA
17h 30m
2 stops
$920Multiple Airlines
Sat, Aug 15 - Mon, Aug 31
Multiple Airlines Logo
3:40 pm - 7:20 pm
SEA
-
SEN
19h 40m
2 stops
Multiple Airlines Logo
7:50 pm - 11:45 am
SEN
-
SEA
23h 55m
2 stops
$1,177Multiple Airlines
Sat, Jul 4 - Sun, Jul 12
Multiple Airlines Logo
6:50 pm - 7:40 pm
SEA
-
SEN
16h 50m
2 stops
Multiple Airlines Logo
7:35 am - 10:42 pm
SEN
-
SEA
23h 07m
3 stops
$1,215Multiple Airlines
Tue, Jul 14 - Sun, Jul 26
Multiple Airlines Logo
7:10 pm - 7:10 pm
SEA
-
SEN
16h 00m
2 stops
Multiple Airlines Logo
7:35 am - 5:10 pm
SEN
-
SEA
17h 35m
2 stops
$1,346Multiple Airlines
Thu, Jul 2 - Sun, Jul 5
Multiple Airlines Logo
7:00 pm - 6:50 pm
SEA
-
SEN
15h 50m
2 stops
Multiple Airlines Logo
7:35 am - 5:10 pm
SEN
-
SEA
17h 35m
2 stops
$1,419Multiple Airlines
Sun, Jul 26 - Sun, Aug 9
Multiple Airlines Logo
5:40 pm - 7:10 pm
SEA
-
SEN
17h 30m
1 stop
Multiple Airlines Logo
7:35 am - 4:20 pm
SEN
-
SEA
16h 45m
1 stop
$1,534Multiple Airlines
Thu, Jul 16 - Sun, Jul 26
Multiple Airlines Logo
6:50 pm - 7:10 pm
SEA
-
SEN
16h 20m
2 stops
Multiple Airlines Logo
7:45 am - 6:45 pm
SEN
-
SEA
19h 00m
2 stops
$1,575Multiple Airlines
Thu, Jul 2 - Mon, Jul 6

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to London Southend 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 May 31, 2026.
Use the filters below to find and compare flights from Washington to London Southend Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Wed 8/19

3:40 pm-4:40 pm

2 stops17h 00m

London Southend

Wed 8/26

12:15 pm-8:40 pm

2 stops16h 25m

$904

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Sat 8/15

3:40 pm-7:20 pm

2 stops19h 40m

London Southend

Mon 8/31

11:10 am-8:40 pm

2 stops17h 30m

$920

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Sat 7/4

3:40 pm-7:20 pm

2 stops19h 40m

London Southend

Sun 7/12

7:50 pm-11:45 am

2 stops23h 55m

$1,177

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Tue 7/14

6:50 pm-7:40 pm

2 stops16h 50m

London Southend

Sun 7/26

7:35 am-10:42 pm

3 stops23h 07m

$1,215

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Thu 7/2

7:10 pm-7:10 pm

2 stops16h 00m

London Southend

Sun 7/5

7:35 am-5:10 pm

2 stops17h 35m

$1,346

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Sun 7/26

7:00 pm-6:50 pm

2 stops15h 50m

London Southend

Sun 8/9

7:35 am-5:10 pm

2 stops17h 35m

$1,419

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Thu 7/16

5:40 pm-7:10 pm

1 stop17h 30m

London Southend

Sun 7/26

7:35 am-4:20 pm

1 stop16h 45m

$1,534

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Thu 7/2

6:50 pm-7:10 pm

2 stops16h 20m

London Southend

Mon 7/6

7:45 am-6:45 pm

2 stops19h 00m

$1,575
Cheapest one-way

PortlandLondon

PDX - SEN

PDXSEN

Portland

Wed 10/21

3:30 pm-12:15 pm

3 stops36h 45m

$328

PortlandLondon

PDX - SEN

PDXSEN

Portland

Wed 9/30

3:30 pm-12:15 pm

3 stops36h 45m

$354

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from State of Washington to London Southend 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

How long does it take to fly to London Southend Airport?

Flight times from State of Washington to London Southend Airport vary, but if you’re flying out of Seattle and flying into London Heathrow Airport (one of the most popular routes), then the duration is 9h 15m on average. Another popular route from State of Washington to London Southend Airport is flying from Bellingham to London Heathrow Airport, which will take roughly 11h 46m. Keep in mind that layovers or delays could extend your travel time.

Cheap State of Washington to London Southend Airport flight deals and tips

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

Fastest flight time

16h 00m

Direct flights

None
The fastest flight from State of Washington to London Southend Airport takes 16h 00m
There are no direct flights from State of Washington to London Southend Airport. There are no popular flight routes from State of Washington to London Southend Airport.
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Frequently asked questions about flying from Washington to London Southend Airport

  • When did momondo last update prices for flights from Washington to London Southend Airport?

    Prices for flights from Washington to London Southend Airport are updated daily.

  • How old do you have to be to fly from Washington 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 Washington to London Southend Airport.

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

    The required travel and health documents for your London Southend Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Southend Airport. We recommend that you seek guidance from your airline or a reliable 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
Slough
Stansted
Harrow
Dartford
Brentwood
Watford
Ilford
Cobham
Folkestone
Uxbridge
Guildford

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington to London. Millions of users trust and use momondo every year so you are in good hands.

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

All flight searches from Washington to London on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Washington to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Washington 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 Washington and alert you when they change.

An easier way to manage your London Southend 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.
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