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Cheap flights from London Southend Airport to Seattle from £419

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEN — SEA
21 Jun — 28 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Southend to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from Southend to Seattle
Explore the most affordable flight options available from Southend to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 May 2026.

Sat 6/607:55
SEN
-
SEA
2 stops22h 51m
Multiple Airlines
Sun 14/613:30
SEA
-
SEN
1 stop13h 00m
Multiple Airlines
Deal found 17/5£948
Sun 6/911:00
SEN
-
SEA
2 stops38h 10m
Multiple Airlines
Sun 20/913:30
SEA
-
SEN
1 stop13h 00m
Multiple Airlines
Deal found 17/5£964
Fri 12/608:10
SEN
-
SEA
1 stop17h 20m
Multiple Airlines
Fri 26/613:30
SEA
-
SEN
1 stop13h 15m
Multiple Airlines
Deal found 19/5£978
Thu 2/717:15
SEN
-
SEA
2 stops31h 55m
Multiple Airlines
Thu 9/713:30
SEA
-
SEN
1 stop13h 15m
Multiple Airlines
Deal found 18/5£1,023
Sat 13/607:55
SEN
-
SEA
2 stops18h 50m
Multiple Airlines
Mon 22/618:50
SEA
-
SEN
1 stop32h 55m
Multiple Airlines
Deal found 20/5£1,051
Thu 11/610:10
SEN
-
SEA
2 stops16h 35m
Multiple Airlines
Thu 25/618:50
SEA
-
SEN
2 stops16h 20m
Multiple Airlines
Deal found 17/5£1,067
Mon 13/707:45
SEN
-
SEA
2 stops21h 15m
Multiple Airlines
Mon 27/718:35
SEA
-
SEN
1 stop33h 10m
Multiple Airlines
Deal found 17/5£1,165
Sun 7/607:25
SEN
-
SEA
2 stops18h 30m
Multiple Airlines
Thu 25/605:45
SEA
-
SEN
3 stops21h 00m
Multiple Airlines
Deal found 16/5£1,261

Find flight deals from Southend to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Southend (SEN) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 22 May 2026.

Round-trip from

£948

One-way from

£419

Popular in

July

Cheapest in

February

Average price

£555
6/6-14/6
  • 6/6-14/6
  • 3 total stops
  • 35h 51m total
  • London to Seattle
Search Deals
20/8
  • 20/8
  • 3 total stops
  • 28h 30m total
  • London to Seattle
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£49 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Southend to Seattle 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, Cheapflights users made 858,174 searches. Data last updated 22 May 2026.
Use the filters below to find and compare flights from London Southend Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSeattle

SEN - SEA

SENSEA

London Southend

Sat 6/6

07:55-22:46

2 stops22h 51m

Seattle/Tacoma Intl

Sun 14/6

13:30-10:30

1 stop13h 00m

£948

LondonSeattle

SEN - SEA

SENSEA

London Southend

Sun 6/9

11:00-17:10

2 stops38h 10m

Seattle/Tacoma Intl

Sun 20/9

13:30-10:30

1 stop13h 00m

£964
Fastest return journey

LondonSeattle

SEN - SEA

SENSEA

London Southend

Fri 12/6

08:10-17:30

1 stop17h 20m

Seattle/Tacoma Intl

Fri 26/6

13:30-10:45

1 stop13h 15m

£978

LondonSeattle

SEN - SEA

SENSEA

London Southend

Thu 2/7

17:15-17:10

2 stops31h 55m

Seattle/Tacoma Intl

Thu 9/7

13:30-10:45

1 stop13h 15m

£1,023

LondonSeattle

SEN - SEA

SENSEA

London Southend

Sat 13/6

07:55-18:45

2 stops18h 50m

Seattle/Tacoma Intl

Mon 22/6

18:50-11:45

1 stop32h 55m

£1,051

LondonSeattle

SEN - SEA

SENSEA

London Southend

Thu 11/6

10:10-22:40

3 stops20h 30m

Seattle/Tacoma Intl

Thu 25/6

18:50-19:10

2 stops16h 20m

£1,090

LondonSeattle

SEN - SEA

SENSEA

London Southend

Mon 13/7

07:45-21:00

2 stops21h 15m

Seattle/Tacoma Intl

Mon 27/7

18:35-11:45

1 stop33h 10m

£1,165

LondonSeattle

SEN - SEA

SENSEA

London Southend

Sun 7/6

07:25-17:55

2 stops18h 30m

Seattle/Tacoma Intl

Thu 25/6

05:45-10:45

3 stops21h 00m

£1,261

LondonSeattle

SEN - SEA

SENSEA

London Southend

Fri 5/6

08:10-18:45

2 stops18h 35m

Seattle/Tacoma Intl

Fri 19/6

13:30-10:45

1 stop13h 15m

£1,269

LondonSeattle

SEN - SEA

SENSEA

London Southend

Sun 5/7

07:35-17:10

2 stops17h 35m

Seattle/Tacoma Intl

Tue 7/7

19:00-19:40

2 stops16h 40m

£1,280

Flights are sorted by cheapest return flights first.

Deals found on 19/5

Showing 1-10 of 22 resultsSorted by cheapest first
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Best time to book a flight from Southend to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Southend with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Southend to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from London Southend?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from London Southend to Seattle. 0 airlines have flights to Seattle/Tacoma Intl from London Southend on a regular basis. Booking flights from London Southend to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 0 inbound flights from London Southend per day.

  • Can I find deals for flights from Southend to Seattle that include hotel bookings?

    Yes. In addition to deals on Southend to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Southend to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Southend to Seattle.

  • Can I find deals for business class flights from Southend to Seattle?

    Yes. Cheapflights offers flight deals from Southend to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Federal Way
SeaTac

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Why should you use Cheapflights to find cheap flight tickets from Southend to Seattle?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Seattle from Southend.

Can Cheapflights find flights from Southend to Seattle with no change fees?

Need flexible booking options for your flight to Seattle from Southend? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Southend to Seattle become cheaper?

Not ready to book yet? You can track prices for flights from Southend to Seattle on Cheapflights with our Price Alert feature and get notified when better prices are available.

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