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Cheap flights from Portland to London from £203

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 23/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Portland to London (PDX-LON)

Cheap return flights

Icelandair Logo
14:45 - 10:55PDX-LGW
12h 10m1 stop
Icelandair Logo
11:55 - 17:00LGW-PDX
13h 05m1 stop
£362Icelandair
Find Deal
Tue, 4 Nov - Wed, 12 Nov
Icelandair Logo
15:20 - 14:40PDX-LGW
15h 20m1 stop
Icelandair Logo
15:40 - 17:55LGW-PDX
34h 15m1 stop
£363Icelandair
Find Deal
Wed, 1 Oct - Mon, 6 Oct
Logo
09:55 - 13:20PDX-LHR
19h 25m1 stop
Logo
08:40 - 18:46LHR-PDX
18h 06m2 stops
£373
Find Deal
Wed, 8 Oct - Wed, 15 Oct
Logo
09:55 - 11:50PDX-LHR
17h 55m2 stops
Logo
08:40 - 18:46LHR-PDX
18h 06m2 stops
£376
Find Deal
Wed, 8 Oct - Wed, 15 Oct
British Airways Logo
08:45 - 06:25PDX-LHR
13h 40m1 stop
British Airways Logo
15:40 - 17:35LHR-PDX
9h 55mdirect
£387British Airways
Find Deal
Wed, 8 Oct - Thu, 16 Oct
British Airways Logo
08:45 - 06:25PDX-LHR
13h 40m1 stop
British Airways Logo
13:45 - 15:55LHR-PDX
10h 10mdirect
£389British Airways
Find Deal
Tue, 14 Oct - Wed, 5 Nov
Iberia Logo
17:45 - 11:20PDX-LHR
9h 35mdirect
Iberia Logo
16:30 - 20:58LHR-PDX
36h 28m1 stop
£406Iberia
Find Deal
Mon, 24 Nov - Thu, 4 Dec
Iberia Logo
19:25 - 13:00PDX-LHR
9h 35mdirect
Iberia Logo
10:05 - 21:47LHR-PDX
18h 42m1 stop
£409Iberia
Find Deal
Sun, 19 Oct - Wed, 29 Oct
Virgin Atlantic Logo
13:15 - 08:50PDX-LCY
11h 35m1 stop
Virgin Atlantic Logo
20:05 - 12:25LCY-PDX
23h 20m1 stop
£478Virgin Atlantic
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Wed, 22 Oct - Thu, 30 Oct
Virgin Atlantic Logo
13:15 - 08:50PDX-LCY
11h 35m1 stop
Virgin Atlantic Logo
17:05 - 12:25LCY-PDX
26h 20m1 stop
£481Virgin Atlantic
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Wed, 22 Oct - Thu, 30 Oct

British Airways flights from Portland to London

Our best British Airways deals on Portland to London flight tickets
British Airways
8 Oct
PDX08:45Portland
13h 40m
1 stop
LHR06:25London Heathrow
16 Oct
LHR15:40London Heathrow
9h 55m
PDX17:35Portland
£387
Find similar
British Airways
14 Oct
PDX08:45Portland
13h 40m
1 stop
LHR06:25London Heathrow
5 Nov
LHR13:45London Heathrow
10h 10m
PDX15:55Portland
£389
Find similar
British Airways
14 Oct
PDX19:25Portland
9h 35m
LHR13:00London Heathrow
30 Oct
LHR08:20London Heathrow
15h 48m
1 stop
PDX17:08Portland
£393
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Lufthansa flights from Portland to London

Our best Lufthansa deals on Portland to London flight tickets
Lufthansa
14 Oct
PDX15:25Portland
13h 55m
1 stop
LHR13:20London Heathrow
29 Oct
LHR14:30London Heathrow
35h 00m
1 stop
PDX18:30Portland
£406
Find similar
Lufthansa
21 Aug
PDX14:15Portland
13h 30m
1 stop
LHR11:45London Heathrow
27 Aug
LHR14:05London Heathrow
36h 41m
2 stops
PDX18:46Portland
£451
Find similar
Lufthansa
10 Nov
PDX10:05Portland
22h 35m
2 stops
LCY16:40London City
17 Nov
LCY18:15London City
32h 21m
2 stops
PDX18:36Portland
£507
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 15 August 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

Tue 4/11

14:45-10:55

1 stop12h 10m

London Gatwick

Wed 12/11

11:55-17:00

1 stop13h 05m

£362

PortlandLondon

PDX - LGW

PDXLGW

Portland

Wed 1/10

15:20-14:40

1 stop15h 20m

London Gatwick

Mon 6/10

15:40-17:55

1 stop34h 15m

£363

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 8/10

09:55-13:20

1 stop19h 25m

London Heathrow

Wed 15/10

08:40-18:46

2 stops18h 06m

£373

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 8/10

09:55-11:50

2 stops17h 55m

London Heathrow

Wed 15/10

08:40-18:46

2 stops18h 06m

£376

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 8/10

08:45-06:25

1 stop13h 40m

London Heathrow

Thu 16/10

15:40-17:35

Nonstop9h 55m

£387

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 14/10

08:45-06:25

1 stop13h 40m

London Heathrow

Wed 5/11

13:45-15:55

Nonstop10h 10m

£389

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 24/11

17:45-11:20

Nonstop9h 35m

London Heathrow

Thu 4/12

16:30-20:58

1 stop36h 28m

£406

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 19/10

19:25-13:00

Nonstop9h 35m

London Heathrow

Wed 29/10

10:05-21:47

1 stop18h 42m

£409

PortlandLondon

PDX - LCY

PDXLCY

Portland

Wed 22/10

13:15-08:50

1 stop11h 35m

London City

Thu 30/10

20:05-12:25

1 stop23h 20m

£478

PortlandLondon

PDX - LCY

PDXLCY

Portland

Wed 22/10

13:15-08:50

1 stop11h 35m

London City

Thu 30/10

17:05-12:25

1 stop26h 20m

£481

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 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 £492, 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 £499.

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 £454. 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 £656.

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 £514. Flights at midday are often more expensive, with an average ticket price of £683.

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 £618 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 £563 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 40% 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 August 2025, prices for Portland to London flights are approximately 40% 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

£203

Fastest flight time

9h 35m

Direct flights

Every day

Airports in London

6 airports
The best one-way flight to London from Portland in the past 72 hours is £203. The best return flight deal from Portland to London found on momondo in the last 72 hours is £362.
The fastest flight from Portland to London takes 9h 35m
Direct flights go from Portland to London every day.
There are 6 airports near London: London City (LCY), London Heathrow (LHR), London Luton (LTN), London Stansted (STN), London Gatwick (LGW), London Southend (SEN)
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  • 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 9h 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
IberiaPriceFrom £449Free CancellationRating
7.0
2,882 reviews
Search Iberia flights
British AirwaysPriceFrom £462Free CancellationRating
6.6
7,267 reviews
Search British Airways 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 £733. 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 £627, 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. 7,267 British Airways reviews by users on momondo have scored the airline at 6.6/10.

Travelling to a place near London?

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

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