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Cheap flights from Portland to London from $342

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to London departing on 3/9. 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
0 bags

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Find the cheapest flights from Portland to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:10 am - 9:25 pm
PDX
-
SEN
27h 15m
3 stops
Multiple Airlines Logo
5:30 pm - 5:55 pm
SEN
-
PDX
32h 25m
3 stops
$1,026Multiple Airlines
Wed, May 6 - Sun, May 17
Multiple Airlines Logo
3:45 pm - 11:05 pm
PDX
-
SEN
24h 20m
3 stops
Multiple Airlines Logo
7:25 am - 6:00 pm
SEN
-
PDX
42h 35m
3 stops
$1,305Multiple Airlines
Tue, Mar 24 - Sun, Mar 29
Multiple Airlines Logo
5:30 am - 8:10 pm
PDX
-
SEN
31h 40m
3 stops
Multiple Airlines Logo
7:35 am - 9:10 pm
SEN
-
PDX
20h 35m
3 stops
$2,744Multiple Airlines
Sat, Mar 14 - Tue, Mar 17
Multiple Airlines Logo
3:45 pm - 8:10 pm
PDX
-
SEN
21h 25m
2 stops
Multiple Airlines Logo
6:40 am - 6:00 pm
SEN
-
PDX
18h 20m
2 stops
$3,589Multiple Airlines
Sat, Mar 21 - Fri, Mar 27

momondo Fare Finder

 
Customize your flight search to find flights from Portland 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 February 10, 2026.
Use the filters below to find and compare flights from Portland to London Southend Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PDX - SEN

PDXSEN

Portland

Wed 5/6

10:10 am-9:25 pm

3 stops27h 15m

London Southend

Sun 5/17

5:30 pm-5:55 pm

3 stops32h 25m

$1,026

PortlandLondon

PDX - SEN

PDXSEN

Portland

Tue 3/24

3:45 pm-11:05 pm

3 stops24h 20m

London Southend

Sun 3/29

7:25 am-6:00 pm

3 stops42h 35m

$1,305

PortlandLondon

PDX - SEN

PDXSEN

Portland

Sat 3/14

5:30 am-8:10 pm

3 stops31h 40m

London Southend

Tue 3/17

7:35 am-9:10 pm

3 stops20h 35m

$2,744

PortlandLondon

PDX - SEN

PDXSEN

Portland

Sat 3/21

3:45 pm-8:10 pm

2 stops21h 25m

London Southend

Fri 3/27

6:40 am-6:00 pm

2 stops18h 20m

$3,589

PortlandLondon

PDX - SEN

PDXSEN

Portland

Mon 3/9

3:45 pm-10:00 am

2 stops35h 15m

$342

PortlandLondon

PDX - SEN

PDXSEN

Portland

Mon 3/9

3:45 pm-10:25 pm

3 stops23h 40m

$344

PortlandLondon

PDX - SEN

PDXSEN

Portland

Tue 3/24

3:45 pm-11:05 pm

3 stops24h 20m

$347

PortlandLondon

PDX - SEN

PDXSEN

Portland

Thu 4/30

3:30 pm-8:00 am

3 stops32h 30m

$367

PortlandLondon

PDX - SEN

PDXSEN

Portland

Sat 5/2

5:51 pm-11:20 am

2 stops57h 29m

$374

PortlandLondon

PDX - SEN

PDXSEN

Portland

Sun 4/26

7:00 am-11:20 am

2 stops44h 20m

$380

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
1
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When to book flights from Portland to London Southend Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Portland to London Southend Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Portland to London Southend Airport (PDX to SEN) flight deals and tips

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

Fastest flight time

24h 20m

Direct flights

None
The fastest flight from Portland to London Southend Airport takes 24h 20m
There are no direct flights from Portland to London Southend Airport. There are no popular flight routes from Portland to London Southend Airport.
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  • How far is Portland to London Southend by plane?

    A flight from Portland to London Southend will travel around 4927.8 mi. A reasonable flight in good conditions will take 24h 20m.

  • When did momondo last update prices for flights from Portland Airport to London Southend Airport?

    Prices for flights from Portland Airport to London Southend Airport were last updated today.

  • How old do you have to be to fly from Portland Airport 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 Portland Airport to London Southend Airport.

  • What documentation or ID do you need to fly to London Southend Airport?

    The travel and health documents required for your trip to London Southend Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Southend Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • How do I get Price Alerts for flights from Portland to London Southend Airport?

    Confirm your travel details to search for the latest offers for flights from Portland to London Southend Airport. 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 Portland to London Southend Airport 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 aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Milton Keynes
Luton
Dover
Slough
Guildford
Crawley
Wembley
Dartford
Hayes
Croydon
Brentwood
Harrow
Watford
Cobham
Folkestone
Romford
Stansted
Richmond

Why use momondo?

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

It is quick and easy to find Portland to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

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

Yes. momondo allows you to filter the results for Portland to London flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between Portland and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Portland to London right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Portland to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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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Thu 3/12
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