In terms of precipitation, rainfall in London Southend Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Southend Airport when rainfall is around 1.6 in.

If weather is an important factor for your trip to London Southend Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

What is the cheapest time of day to fly from SEA to SEN?

When flying from Seattle to London Southend Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to London Southend. On average, Seattle/Tacoma Intl has 0 outbound flights to London Southend per day from 0 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

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

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

How can I find direct flights from Seattle to Southend?

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

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

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

$370+ Flights from Seattle to London Southend Airport

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Cheap flight deals from Seattle to Southend

Best flights from Seattle to Southend
Discover carefully curated flight deals from Seattle to Southend that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 15, 2025.

Wed 3/113:35 pmSEA - SEN

2 stops22h 25mMultiple Airlines

Wed 3/187:10 amSEN - SEA

2 stops17h 50mMultiple Airlines

Deal found 12/12

$638

Sun 2/12:35 pmSEA - SEN

2 stops16h 15mMultiple Airlines

Tue 2/177:35 amSEN - SEA

2 stops17h 25mMultiple Airlines

Deal found 12/13

$664

Sun 1/182:35 pmSEA - SEN

2 stops16h 15mMultiple Airlines

Sun 1/255:25 pmSEN - SEA

2 stops31h 35mMultiple Airlines

Deal found 12/15

$716

Last-minute flights from Seattle to Southend
Discover last-minute flight deals from Seattle to Southend. Data last updated December 15, 2025 and is based on user searches.

Sun 1/182:35 pmSEA - SEN

2 stops16h 15mMultiple Airlines

Sun 1/255:25 pmSEN - SEA

2 stops31h 35mMultiple Airlines

Deal found 12/15

$716

One-way flights from Seattle to Southend
Search for one-way flight options from Seattle to Southend. Find affordable one-way fares based on user searches. Data last updated December 15, 2025.

Tue 3/310:53 amSEA - SEN

3 stops28h 12mMultiple Airlines

Deal found 12/13

$370

Sat 2/285:50 amSEA - SEN

3 stops31h 00mMultiple Airlines

Deal found 12/14

$396

Sat 2/710:09 amSEA - SEN

2 stops26h 41mMultiple Airlines

Deal found 12/15

$405

Tue 1/2710:09 amSEA - SEN

3 stops28h 36mMultiple Airlines

Deal found 12/12

$418

Thu 2/128:10 amSEA - SEN

2 stops20h 40mMultiple Airlines

Deal found 12/14

$492

Fri 1/3010:09 amSEA - SEN

3 stops28h 51mMultiple Airlines

Deal found 12/15

$527

Sun 12/283:10 pmSEA - SEN

3 stops38h 40mMultiple Airlines

Deal found 12/13

$595

Fri 1/232:35 pmSEA - SEN

2 stops16h 30mMultiple Airlines

Deal found 12/15

$672

Sat 12/275:40 pmSEA - SEN

2 stops33h 45mMultiple Airlines

Deal found 12/13

$673

Fri 1/23:10 pmSEA - SEN

3 stops37h 05mMultiple Airlines

Deal found 12/14

$681

Find flight deals from Seattle to Southend

Most accurate provider	Mytrip 3 stars
Most trusted provider	Mytrip 3 stars
Round-trip from	$638 (Mytrip)
One-way from	$370 (Kiwi.com)
Popular in	June
Cheapest in	November
Average price	$986

Provider with most accurate pricing for Seattle/Tacoma Intl-London (LON) flight deals.

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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-London (LON) flights.

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From Seattle/Tacoma Intl to London Southend

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One-way flight from Seattle/Tacoma Intl to London Southend

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Highest demand for flights based on searches. 15% potential increase in price ($139 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).

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Average for round-trip flights in December 2025

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Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Wed 3/11

3:35 pm-9:00 pm

2 stops22h 25m

London Southend

Wed 3/18

7:10 am-6:00 pm

2 stops17h 50m

$638

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Sun 2/1

2:35 pm-2:50 pm

2 stops16h 15m

London Southend

Tue 2/17

7:35 am-5:00 pm

2 stops17h 25m

$664

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Sun 1/18

2:35 pm-2:50 pm

2 stops16h 15m

London Southend

Sun 1/25

5:25 pm-5:00 pm

2 stops31h 35m

$716

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Tue 3/3

10:53 am-11:05 pm

3 stops28h 12m

$370

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Sat 2/28

5:50 am-8:50 pm

3 stops31h 00m

$396

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Sat 2/7

10:09 am-8:50 pm

2 stops26h 41m

$405

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Tue 1/27

10:09 am-10:45 pm

3 stops28h 36m

$418

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Thu 2/12

8:10 am-12:50 pm

2 stops20h 40m

$492

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Fri 1/30

10:09 am-11:00 pm

3 stops28h 51m

$527

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Sun 12/28

3:10 pm-1:50 pm

3 stops38h 40m

$595

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/13

Showing 1-10 of 13 results

Best time to book a flight from Seattle to Southend

Have a flexible travel schedule? Discover the best time to fly to Southend from Seattle with our price prediction graph.

Estimated round-trip 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

What airport do you fly from for flights from Seattle to London Southend?
Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to London Southend. On average, Seattle/Tacoma Intl has 0 outbound flights to London Southend per day from 0 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.
Can I find deals for flights from Seattle to Southend that include hotel bookings?
Yes. In addition to deals on Seattle to Southend flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Seattle to Southend?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Southend.
Can I find deals for business class flights from Seattle to Southend?
Yes. Cheapflights offers flight deals from Seattle to Southend 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

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$370+ Cheap flights from Seattle (SEA) to Southend (SEN)

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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Seattle to Southend with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Seattle to Southend

Best flights from Seattle to SouthendDiscover carefully curated flight deals from Seattle to Southend that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 15, 2025.

Discover carefully curated flight deals from Seattle to Southend that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 15, 2025.

Find flight deals from Seattle to Southend

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

Best time to book a flight from Seattle to Southend

Have a flexible travel schedule? Discover the best time to fly to Southend from Seattle with our price prediction graph.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Southend. 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 from for flights from Seattle to London Southend?

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

How can I find direct flights from Seattle to Southend?

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

Traveling to a place near London Southend Airport?

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Alternative routes for Seattle to Southend

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Best flights from Seattle to Southend
Discover carefully curated flight deals from Seattle to Southend that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 15, 2025.