HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Southend

$375+ 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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SEN
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Southend with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Seattle to Southend

Cheapest flights from Seattle to Southend
Explore the most affordable flight options available from Seattle to Southend. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 26, 2026.

This Mytrip deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/112:35 pm
SEA
-
SEN
2 stops22h 25m
Multiple Airlines
Wed 2/187:10 am
SEN
-
SEA
2 stops17h 50m
Multiple Airlines
Deal found 1/25$896
This Mytrip deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/12:35 pm
SEA
-
SEN
3 stops24h 25m
Multiple Airlines
Wed 2/47:10 am
SEN
-
SEA
3 stops34h 05m
Multiple Airlines
Deal found 1/24$933
This Mytrip deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/282:35 pm
SEA
-
SEN
2 stops18h 40m
Multiple Airlines
Fri 1/306:40 am
SEN
-
SEA
3 stops18h 20m
Multiple Airlines
Deal found 1/24$1,784

Find flight deals from Seattle to Southend

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Southend (SEN). 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 January 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$896
(Mytrip)

One-way from

$375
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$650
Provider with most accurate pricing for Seattle/Tacoma Intl-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-London (LON) flights.
Search Deals
From Seattle/Tacoma Intl to London Southend
Search Deals
One-way flight from Seattle/Tacoma Intl to London Southend
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($137 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Southend 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 2,558,603 searches. Data last updated January 26, 2026.
Use the filters below to find and compare flights from Seattle to London Southend Airport that are best for you.

Fly from

Seattle

Fly to

Southend

Route

Depart

Return

Price

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Wed 2/11

2:35 pm-9:00 pm

2 stops22h 25m

London Southend

Wed 2/18

7:10 am-5:00 pm

2 stops17h 50m

$896

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Tue 7/21

6:50 pm-10:20 pm

2 stops19h 30m

$375

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Wed 3/11

3:35 pm-11:40 am

2 stops37h 05m

$382

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Sun 2/1

2:35 pm-11:00 pm

3 stops24h 25m

$385

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Sun 7/19

6:50 pm-10:25 pm

2 stops19h 35m

$386

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Sat 5/16

9:40 pm-7:50 pm

2 stops38h 10m

$390

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Tue 5/12

2:10 pm-10:20 pm

3 stops24h 10m

$393

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Sun 3/1

10:51 pm-7:45 pm

2 stops36h 54m

$399

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Sun 2/22

10:51 pm-7:45 pm

2 stops36h 54m

$401

SeattleLondon

SEA - SEN

SEASEN

Seattle/Tacoma Intl

Thu 3/12

3:35 pm-10:15 pm

2 stops23h 40m

$409

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

Showing 1-10 of 11 results
1
2

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

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?

    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

Traveling to a place near London Southend Airport?

Book flights to London Southend Airport if you plan to visit one of these locations
Ilford
Hounslow
Southend-on-Sea
Harrow
Croydon
Eastleigh
Gatwick
Dartford
Dover
Winchester
Orpington
Watford
Hayes
Borehamwood
Aylesbury
Chipping Norton
Horley
Kingston upon Thames
Eastbourne
Sutton

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.