How do I get Price Alerts for flights from London Southend Airport to State of Washington?

Confirm your travel details to search for the latest offers for flights from London Southend Airport to State of Washington . 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 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.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Southend Airport to Washington.

What documentation or ID do you need to fly to Washington?

The necessary travel and health documents for your Washington trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$512 Cheap Flights from London Southend Airport to State of Washington in 2026

1 adult

0 bags

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Find the cheapest flights from London Southend Airport to Washington

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:00 am - 10:06 pm

SEN

SEA

20h 06m

3 stops

2:35 pm - 11:05 pm

SEA

SEN

24h 30m

3 stops

$1,013Multiple Airlines

Fri, Feb 6 - Tue, Feb 10

6:05 pm - 6:05 pm

SEN

SEA

31h 00m

2 stops

5:50 am - 10:30 am

SEA

SEN

21h 40m

3 stops

$1,327Multiple Airlines

Thu, Mar 19 - Sun, Mar 22

7:10 am - 2:19 pm

SEN

SEA

38h 09m

2 stops

4:05 pm - 5:15 pm

SEA

SEN

18h 10m

1 stop

$1,426Multiple Airlines

Wed, Mar 11 - Wed, Mar 18

6:40 am - 6:00 pm

SEN

SEA

18h 20m

2 stops

7:00 pm - 7:35 pm

SEA

SEN

16h 35m

2 stops

$1,568Multiple Airlines

Fri, Mar 27 - Thu, Apr 9

7:10 am - 12:25 pm

SEN

SEA

36h 15m

1 stop

3:10 pm - 9:00 pm

SEA

SEN

22h 50m

1 stop

$2,818Multiple Airlines

Wed, Mar 11 - Wed, Mar 18

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonSeattle

SEN - SEA

SENSEA

London Southend

Fri 2/6

10:00 am-10:06 pm

3 stops20h 06m

Seattle/Tacoma Intl

Tue 2/10

2:35 pm-11:05 pm

3 stops24h 30m

$1,013

LondonSeattle

SEN - SEA

SENSEA

London Southend

Thu 3/19

6:05 pm-6:05 pm

2 stops31h 00m

Seattle/Tacoma Intl

Sun 3/22

5:50 am-10:30 am

3 stops21h 40m

$1,327

LondonSeattle

SEN - SEA

SENSEA

London Southend

Wed 3/11

7:10 am-2:19 pm

2 stops38h 09m

Seattle/Tacoma Intl

Wed 3/18

4:05 pm-5:15 pm

1 stop18h 10m

$1,426

LondonSeattle

SEN - SEA

SENSEA

London Southend

Fri 3/27

6:40 am-6:00 pm

2 stops18h 20m

Seattle/Tacoma Intl

Thu 4/9

7:00 pm-7:35 pm

2 stops16h 35m

$1,568

LondonSeattle

SEN - SEA

SENSEA

London Southend

Wed 3/11

7:10 am-12:25 pm

1 stop36h 15m

Seattle/Tacoma Intl

Wed 3/18

3:10 pm-9:00 pm

1 stop22h 50m

$2,818

LondonSeattle

SEN - SEA

SENSEA

London Southend

Thu 2/12

6:50 am-8:13 am

3 stops33h 23m

$512

LondonSeattle

SEN - SEA

SENSEA

London Southend

Tue 4/14

8:25 pm-5:10 pm

3 stops28h 45m

$519

LondonSeattle

SEN - SEA

SENSEA

London Southend

Thu 4/16

8:40 pm-5:10 pm

3 stops28h 30m

$522

LondonSeattle

SEN - SEA

SENSEA

London Southend

Thu 2/12

6:50 am-11:25 am

2 stops36h 35m

$533

LondonSeattle

SEN - SEA

SENSEA

London Southend

Mon 3/2

7:15 am-8:57 am

3 stops33h 42m

$540

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first

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

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

Fastest flight time	16h 20m
Direct flights	None

The fastest flight from London Southend Airport to State of Washington takes 16h 20m

There are no direct flights from London Southend Airport to State of Washington. There are no popular flight routes from London Southend Airport to State of Washington.

Search flight deals

When did momondo last update prices for flights from London Southend Airport to Washington?
Prices for flights from London Southend Airport to Washington refresh daily.
How old do you have to be to fly from London Southend Airport to Washington?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Southend Airport to Washington.
What documentation or ID do you need to fly to Washington?
The necessary travel and health documents for your Washington trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

How do I get Price Alerts for flights from London Southend Airport to State of Washington?
Confirm your travel details to search for the latest offers for flights from London Southend Airport to State of Washington. 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 London Southend Airport to State of Washington with momondo?
Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.
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.

Why use momondo?

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

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

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

Yes. momondo enables you to select and highlight flights to Washington from London with this policy.

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

Once all potential London to Washington 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 London to Washington right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Washington from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.