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Cheap flights from Portland to London from $360

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 9/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Portland to London (PDX-SEN)

Cheap round-trip flights

Logo
7:21 am - 3:45 pmPDX-SEN
24h 24m2 stops
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1:55 pm - 11:05 amSEN-PDX
29h 10m1 stop
$2,655
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Thu, Oct 2 - Thu, Oct 9

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 August 18, 2025.
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

Thu 10/2

7:21 am-3:45 pm

2 stops24h 24m

London Southend

Thu 10/9

1:55 pm-11:05 am

1 stop29h 10m

$2,655

PortlandLondon

PDX - SEN

PDXSEN

Portland

Wed 9/17

7:04 am-8:50 pm

3 stops29h 46m

$360

PortlandLondon

PDX - SEN

PDXSEN

Portland

Wed 9/17

2:50 pm-8:50 pm

2 stops22h 00m

$376

PortlandLondon

PDX - SEN

PDXSEN

Portland

Thu 9/11

3:20 pm-3:45 pm

2 stops16h 25m

$523

PortlandLondon

PDX - SEN

PDXSEN

Portland

Sun 8/31

3:20 pm-7:35 pm

3 stops20h 15m

$630

PortlandLondon

PDX - SEN

PDXSEN

Portland

Tue 9/9

3:35 pm-11:05 pm

2 stops23h 30m

$715

PortlandLondon

PDX - SEN

PDXSEN

Portland

Wed 9/24

3:20 pm-4:40 pm

2 stops17h 20m

$737

PortlandLondon

PDX - SEN

PDXSEN

Portland

Sun 8/31

3:20 pm-7:35 pm

2 stops20h 15m

$798

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

Best Price Found

$360

Fastest flight time

16h 25m

Direct flights

None
The best one-way flight to London Southend Airport from Portland in the past 72 hours is $360. The best round-trip flight deal from Portland to London Southend Airport found on momondo in the last 72 hours is $2,655.
The fastest flight from Portland to London Southend Airport takes 16h 25m
There are no direct flights from Portland to London Southend Airport. Popular non-direct route for this connection is Portland Airport - 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 24m.

  • 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
Hounslow
Gatwick
Dover
Slough
Luton
Guildford
Milton Keynes
Dartford
Crawley
Hayes
Chelmsford
Stansted
Brentwood
Ilford
Colchester
Folkestone
Watford
Richmond
Canterbury
Wembley

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

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