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Cheap flights from Washington to London from $294

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.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Washington to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:00 pm - 6:50 pm
PDX
-
SEN
15h 50m
2 stops
Multiple Airlines Logo
7:35 am - 5:50 pm
SEN
-
PDX
18h 15m
2 stops
$1,216Multiple Airlines
Sun, Aug 23 - Sun, Aug 30
Multiple Airlines Logo
7:00 pm - 6:50 pm
PDX
-
SEN
15h 50m
2 stops
Multiple Airlines Logo
7:35 am - 5:50 pm
SEN
-
PDX
18h 15m
2 stops
$1,236Multiple Airlines
Sun, Aug 23 - Sun, Aug 30
Multiple Airlines Logo
10:10 am - 7:35 pm
PDX
-
SEN
25h 25m
3 stops
Multiple Airlines Logo
4:55 pm - 7:11 pm
SEN
-
PDX
34h 16m
3 stops
$1,269Multiple Airlines
Thu, Sep 17 - Sun, Sep 20
Multiple Airlines Logo
8:59 am - 10:30 am
SEA
-
SEN
17h 31m
2 stops
Multiple Airlines Logo
7:25 am - 5:48 pm
SEN
-
SEA
18h 23m
1 stop
$1,485Multiple Airlines
Sun, Sep 6 - Sun, Sep 13
Multiple Airlines Logo
1:30 pm - 10:30 am
SEA
-
SEN
13h 00m
1 stop
Multiple Airlines Logo
7:25 am - 5:48 pm
SEN
-
SEA
18h 23m
1 stop
$1,501Multiple Airlines
Sun, Sep 6 - Sun, Sep 13

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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 July 26, 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

PortlandLondon

PDX - SEN

PDXSEN

Portland

Sun 8/23

7:00 pm-6:50 pm

2 stops15h 50m

London Southend

Sun 8/30

7:35 am-5:50 pm

2 stops18h 15m

$1,216

PortlandLondon

PDX - SEN

PDXSEN

Portland

Sun 8/23

7:00 pm-6:50 pm

2 stops15h 50m

London Southend

Sun 8/30

7:35 am-5:50 pm

2 stops18h 15m

$1,236

PortlandLondon

PDX - SEN

PDXSEN

Portland

Thu 9/17

10:10 am-7:35 pm

3 stops25h 25m

London Southend

Sun 9/20

4:55 pm-7:11 pm

3 stops34h 16m

$1,269

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Sun 9/6

8:59 am-10:30 am

2 stops17h 31m

London Southend

Sun 9/13

7:25 am-5:48 pm

1 stop18h 23m

$1,485
Quickest round-trip

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Sun 9/6

1:30 pm-10:30 am

1 stop13h 00m

London Southend

Sun 9/13

7:25 am-5:48 pm

1 stop18h 23m

$1,501
Cheapest one-way

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Wed 10/21

7:00 pm-12:15 pm

3 stops33h 15m

$294

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Thu 10/15

7:00 pm-8:40 am

3 stops29h 40m

$295

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Thu 10/15

7:00 pm-8:40 am

3 stops29h 40m

$312

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Sat 10/17

3:40 pm-4:25 pm

3 stops40h 45m

$324

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Thu 10/22

7:00 pm-8:40 am

3 stops29h 40m

$329

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 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 Spokane to London Heathrow Airport, which will take roughly 12h 33m. 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

17h 31m

Direct flights

None
The fastest flight from State of Washington to London Southend Airport takes 17h 31m
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
Hayes
Dover
Crawley
Wembley
Croydon
Stansted
Kingston upon Thames
Watford
Slough
Harrow
Brentwood
Cobham
Romford
Uxbridge
Guildford
Worthing

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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