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Cheap flights from Portland to London from £180

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 18/10. 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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Cheap return flights

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Icelandair Logo
14:45 - 10:55PDX-LGW
12h 10m1 stop
Icelandair Logo
11:55 - 17:00LGW-PDX
13h 05m1 stop
£413Icelandair
Find Deal
Sat, 8 Nov - Sun, 16 Nov
Icelandair Logo
14:45 - 10:50PDX-LHR
12h 05m1 stop
Icelandair Logo
12:15 - 17:00LHR-PDX
12h 45m1 stop
£416Icelandair
Find Deal
Sat, 8 Nov - Fri, 14 Nov
Icelandair Logo
14:45 - 19:30PDX-LHR
20h 45m1 stop
Icelandair Logo
20:35 - 17:00LHR-PDX
28h 25m1 stop
£417Icelandair
Find Deal
Mon, 3 Nov - Sat, 8 Nov
Lufthansa Logo
09:50 - 10:10PDX-LHR
16h 20m2 stops
Lufthansa Logo
07:40 - 18:30LHR-PDX
18h 50m2 stops
£425Lufthansa
Find Deal
Tue, 4 Nov - Fri, 21 Nov
Scandinavian Airlines Logo
10:23 - 18:30PDX-LHR
24h 07m2 stops
Scandinavian Airlines Logo
06:40 - 22:56LHR-PDX
24h 16m2 stops
£430Scandinavian Airlines
Find Deal
Mon, 3 Nov - Wed, 19 Nov
Scandinavian Airlines Logo
12:40 - 17:40PDX-LHR
21h 00m2 stops
Scandinavian Airlines Logo
10:20 - 22:56LHR-PDX
20h 36m2 stops
£440Scandinavian Airlines
Find Deal
Mon, 3 Nov - Wed, 19 Nov
Lufthansa Logo
09:50 - 11:50PDX-LHR
18h 00m1 stop
Lufthansa Logo
07:40 - 18:06LHR-PDX
18h 26m2 stops
£448Lufthansa
Find Deal
Mon, 1 Dec - Wed, 10 Dec
Virgin Atlantic Logo
09:58 - 07:05PDX-LHR
14h 07m2 stops
Virgin Atlantic Logo
20:25 - 11:25LHR-PDX
23h 00m1 stop
£457Virgin Atlantic
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Tue, 28 Oct - Tue, 4 Nov
British Airways Logo
11:48 - 08:35PDX-LHR
13h 47m1 stop
British Airways Logo
13:45 - 15:55LHR-PDX
10h 10mdirect
£470British Airways
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Wed, 29 Oct - Wed, 5 Nov
Virgin Atlantic Logo
13:25 - 17:20PDX-LCY
19h 55m1 stop
Virgin Atlantic Logo
17:05 - 11:25LCY-PDX
26h 20m1 stop
£477Virgin Atlantic
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Sun, 9 Nov - Tue, 18 Nov

Scandinavian Airlines flights from Portland to London

Our best Scandinavian Airlines deals on Portland to London flight tickets
Scandinavian Airlines
3 Nov
PDX10:23Portland
24h 07m
2 stops
LHR18:30London Heathrow
19 Nov
LHR06:40London Heathrow
24h 16m
2 stops
PDX22:56Portland
£430
Find similar
Scandinavian Airlines
3 Nov
PDX12:40Portland
21h 00m
2 stops
LHR17:40London Heathrow
19 Nov
LHR10:20London Heathrow
20h 36m
2 stops
PDX22:56Portland
£440
Find similar
Scandinavian Airlines
3 Nov
PDX10:23Portland
27h 17m
2 stops
LHR21:40London Heathrow
19 Nov
LHR10:20London Heathrow
20h 36m
2 stops
PDX22:56Portland
£442
Find similar

Air Canada flights from Portland to London

Our best Air Canada deals on Portland to London flight tickets
Air Canada
3 Nov
PDX15:15Portland
12h 35m
1 stop
LHR11:50London Heathrow
19 Nov
LHR15:00London Heathrow
26h 15m
2 stops
PDX09:15Portland
£451
Find similar
Air Canada
18 Nov
PDX19:00Portland
30h 20m
2 stops
LHR09:20London Heathrow
26 Nov
LHR18:00London Heathrow
30h 05m
2 stops
PDX16:05Portland
£468
Find similar
Air Canada
14 Oct
PDX15:25Portland
13h 55m
1 stop
LHR13:20London Heathrow
4 Nov
LHR14:30London Heathrow
26h 45m
1 stop
PDX09:15Portland
£546
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Portland to London 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 279,928 searches. Data last updated 2 October 2025.
Use the filters below to find and compare flights from Portland to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PDX - LGW

PDXLGW

Portland

Sat 8/11

14:45-10:55

1 stop12h 10m

London Gatwick

Sun 16/11

11:55-17:00

1 stop13h 05m

£413

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 8/11

14:45-10:50

1 stop12h 05m

London Heathrow

Fri 14/11

12:15-17:00

1 stop12h 45m

£416

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 3/11

14:45-19:30

1 stop20h 45m

London Heathrow

Sat 8/11

20:35-17:00

1 stop28h 25m

£417

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 4/11

09:50-10:10

2 stops16h 20m

London Heathrow

Fri 21/11

07:40-18:30

2 stops18h 50m

£425

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 3/11

10:23-18:30

2 stops24h 07m

London Heathrow

Wed 19/11

06:40-22:56

2 stops24h 16m

£430

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 3/11

12:40-17:40

2 stops21h 00m

London Heathrow

Wed 19/11

10:20-22:56

2 stops20h 36m

£440

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 1/12

09:50-11:50

1 stop18h 00m

London Heathrow

Wed 10/12

07:40-18:06

2 stops18h 26m

£448

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 28/10

09:58-07:05

2 stops14h 07m

London Heathrow

Tue 4/11

20:25-11:25

1 stop23h 00m

£457

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 29/10

11:48-08:35

1 stop13h 47m

London Heathrow

Wed 5/11

13:45-15:55

Nonstop10h 10m

£470

PortlandLondon

PDX - LCY

PDXLCY

Portland

Sun 9/11

13:25-17:20

1 stop19h 55m

London City

Tue 18/11

17:05-11:25

1 stop26h 20m

£477

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Portland to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Portland and London?

What is the cheapest month to fly to London?

The cheapest month to fly to London from Portland is in October. Flight prices, which tend to average around £485, are often lower during this time because this is during the off-season. The month of November is another great option to travel to London, with average flight prices from Portland averaging around £502.

What is the cheapest day to depart on your flight to London?

Our data shows that Friday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £478. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Portland to London for around £639.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £515. Flights at midday are often more expensive, with an average ticket price of £688.

What is the cheapest Portland to London flight route?

Fly from Portland to London Heathrow for the best Portland - London flight prices

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £621 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Portland for as low as £540 on momondo.

What cabin class options are available on Portland to London flights?

There are 3 cabin classes available to choose from on Portland to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Portland to London flights?

You could potentially save up to 9% on your flight if you consider stops on a Portland to London flight.

How have Portland to London flight prices changed over time?

As of October 2025, prices for Portland to London flights are approximately 30% cheaper when compared to flights at the same time last year.

When to book flights from Portland to London

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

Cheap Portland to London (PDX to LON) flight deals and tips

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

Best price found

£378

Fastest flight time

9h 35m

Direct flights

Every day

Airports in London

1 airport
The best one-way flight to London from Portland in the past 72 hours is £378. The best return flight deal from Portland to London found on momondo in the last 72 hours is £514.
The fastest flight from Portland to London takes 9h 35m
Direct flights go from Portland to London every day.
There is 1 airport near London: London Heathrow (LHR)
Search flight deals

  • How far is Portland to London by plane?

    The straight-line distance from Portland to London is 4909.8 mi. A reasonable flight in good conditions will take 11h 35m.

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

    Prices for flights from Portland Airport to London refresh daily.

  • How many operators does momondo search for flights from Portland Airport to London?

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

    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.

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

    The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Portland to London?

  • What is the most popular airline from Portland to London?

Best airlines flying from Portland to London

Compare and see reviews for airlines that fly from Portland to London with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom £382Free CancellationRating
6.7
7,413 reviews
Search British Airways flights
IcelandairPriceFrom £438Free CancellationRating
7.0
546 reviews
Search Icelandair flights
IberiaPriceFrom £452Free CancellationRating
7.0
2,966 reviews
Search Iberia flights
Virgin AtlanticPriceFrom £489Free CancellationRating
7.4
665 reviews
Search Virgin Atlantic flights

  • Iberia Flights From Portland to London

    Iberia is one of the most popular airlines flying from Portland to London, operating 7 flights/week on average for this route. A good Iberia flight deal for Portland to London starts from £609 round-trip, up to an average price of £695. Our users have rated Iberia at 7.0/10.

  • British Airways Flights From Portland to London

    The best British Airways deal for Portland to London flight tickets found on momondo in the last 72 hours was £514, round-trip. It should be noted that an average British Airways flight deal for this route in this time was higher, at £723 round-trip. British Airways operates 7 flights out of Portland into London in an average week, so prices vary by time and availability. 7,413 British Airways reviews by users on momondo have scored the airline at 6.7/10.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Maidstone
Gatwick
Slough
Canterbury
Southend-on-Sea
Ipswich
Ilford
Guildford
Colchester
Worthing
Hayes
Dover
Chelmsford
Dartford
Hounslow
Stansted
Chichester

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Portland.

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

Flights from Portland to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Portland to London.

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

Yes momondo offers price alerts on flights to London from Portland. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London
London City Airport
London Gatwick Airport
London Heathrow Airport
London Luton Airport
London Southend Airport
London Stansted Airport