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Cheap flights from Portland to London from £192

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 11/1. 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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Cheap return flights

Enter your travel dates to find the best prices.
Icelandair Logo
15:45 - 10:50PDX-LHR
12h 05m1 stop
Icelandair Logo
12:15 - 18:00LHR-PDX
12h 45m1 stop
£426Icelandair
Find Deal
Mon, 9 Mar - Fri, 13 Mar
Virgin Atlantic Logo
06:00 - 07:05PDX-LHR
17h 05m1 stop
Virgin Atlantic Logo
11:05 - 17:35LHR-PDX
14h 30m1 stop
£429Virgin Atlantic
Find Deal
Wed, 14 Jan - Thu, 29 Jan
Icelandair Logo
15:45 - 20:20PDX-LHR
20h 35m1 stop
Icelandair Logo
21:25 - 11:45LHR-PDX
22h 20m1 stop
£430Icelandair
Find Deal
Thu, 30 Apr - Wed, 20 May
KLM Logo
13:45 - 10:00PDX-LHR
12h 15m1 stop
KLM Logo
06:30 - 11:25LHR-PDX
12h 55m1 stop
£438KLM
Find Deal
Mon, 24 Nov - Wed, 3 Dec
KLM Logo
14:23 - 10:30PDX-LHR
12h 07m1 stop
KLM Logo
06:30 - 11:25LHR-PDX
12h 55m1 stop
£442KLM
Find Deal
Wed, 3 Dec - Wed, 10 Dec
Delta Logo
05:30 - 07:50PDX-LHR
18h 20m2 stops
Delta Logo
06:30 - 11:25LHR-PDX
12h 55m1 stop
£445Delta
Find Deal
Sun, 23 Nov - Wed, 3 Dec
Multiple Airlines Logo
14:45 - 21:00PDX-LGW
22h 15m2 stops
Multiple Airlines Logo
08:25 - 17:00LGW-PDX
16h 35m2 stops
£445Multiple Airlines
Find Deal
Mon, 24 Nov - Sun, 7 Dec
British Airways Logo
17:45 - 11:20PDX-LHR
9h 35mdirect
British Airways Logo
10:05 - 19:10LHR-PDX
17h 05m1 stop
£445British Airways
Find Deal
Wed, 3 Dec - Wed, 10 Dec
Multiple Airlines Logo
14:45 - 18:20PDX-STN
19h 35m2 stops
Multiple Airlines Logo
06:30 - 17:00STN-PDX
18h 30m2 stops
£446Multiple Airlines
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Mon, 24 Nov - Sun, 7 Dec
Delta Logo
13:25 - 09:30PDX-LCY
12h 05m1 stop
Delta Logo
09:20 - 20:40LCY-PDX
19h 20m2 stops
£488Delta
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Sun, 30 Nov - Wed, 10 Dec

Finnair flights from Portland to London

Our best Finnair deals on Portland to London flight tickets
Finnair
14 Jan
PDX17:45Portland
9h 35m
LHR11:20London Heathrow
29 Jan
LHR12:30London Heathrow
18h 08m
1 stop
PDX22:38Portland
£446
Find similar
Finnair
14 Jan
PDX17:45Portland
9h 35m
LHR11:20London Heathrow
30 Jan
LHR08:20London Heathrow
18h 31m
1 stop
PDX18:51Portland
£451
Find similar

Delta flights from Portland to London

Our best Delta deals on Portland to London flight tickets
Delta
25 Nov
PDX00:35Portland
22h 30m
1 stop
LHR07:05London Heathrow
3 Dec
LHR06:30London Heathrow
12h 55m
1 stop
PDX11:25Portland
£442
Find similar
Delta
23 Nov
PDX05:30Portland
18h 20m
2 stops
LHR07:50London Heathrow
3 Dec
LHR06:30London Heathrow
12h 55m
1 stop
PDX11:25Portland
£445
Find similar
Delta
23 Nov
PDX19:22Portland
30h 38m
1 stop
LHR10:00London Heathrow
3 Dec
LHR06:30London Heathrow
12h 55m
1 stop
PDX11:25Portland
£445
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 14 November 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 - LHR

PDXLHR

Portland

Mon 9/3

15:45-10:50

1 stop12h 05m

London Heathrow

Fri 13/3

12:15-18:00

1 stop12h 45m

£426

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 14/1

06:00-07:05

1 stop17h 05m

London Heathrow

Thu 29/1

11:05-17:35

1 stop14h 30m

£429

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 30/4

15:45-20:20

1 stop20h 35m

London Heathrow

Wed 20/5

21:25-11:45

1 stop22h 20m

£430

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 24/11

13:45-10:00

1 stop12h 15m

London Heathrow

Wed 3/12

06:30-11:25

1 stop12h 55m

£438

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 3/12

14:23-10:30

1 stop12h 07m

London Heathrow

Wed 10/12

06:30-11:25

1 stop12h 55m

£442

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 23/11

05:30-07:50

2 stops18h 20m

London Heathrow

Wed 3/12

06:30-11:25

1 stop12h 55m

£445

PortlandLondon

PDX - LGW

PDXLGW

Portland

Mon 24/11

14:45-21:00

2 stops22h 15m

London Gatwick

Sun 7/12

08:25-17:00

2 stops16h 35m

£445

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 3/12

17:45-11:20

Nonstop9h 35m

London Heathrow

Wed 10/12

10:05-19:10

1 stop17h 05m

£445

PortlandLondon

PDX - STN

PDXSTN

Portland

Mon 24/11

14:45-18:20

2 stops19h 35m

London Stansted

Sun 7/12

06:30-17:00

2 stops18h 30m

£446

PortlandLondon

PDX - LCY

PDXLCY

Portland

Sun 30/11

13:25-09:30

1 stop12h 05m

London City

Wed 10/12

09:20-20:40

2 stops19h 20m

£488

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 £490, 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 £468. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Portland to London for around £565.

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 £523. Flights at midday are often more expensive, with an average ticket price of £704.

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 £635 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 £566 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 16% 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 November 2025, prices for Portland to London flights are approximately 14% 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

£3,236

Fastest flight time

9h 30m

Direct flights

Every day

Airports in London

1 airport
The best one-way flight to London from Portland in the past 72 hours is £3,236. The best return flight deal from Portland to London found on momondo in the last 72 hours is £1,388.
The fastest flight from Portland to London takes 9h 30m
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 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
British AirwaysPriceFrom £391Free CancellationRating
6.7
7,520 reviews
Search British Airways flights
IcelandairPriceFrom £448Free CancellationRating
7.1
578 reviews
Search Icelandair flights
IberiaPriceFrom £463Free CancellationRating
7.0
3,012 reviews
Search Iberia flights
Virgin AtlanticPriceFrom £501Free CancellationRating
7.5
673 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 3 flights/week on average for this route. A good Iberia flight deal for Portland to London starts from £463 round-trip, up to an average price of £528. 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 £391, round-trip. It should be noted that an average British Airways flight deal for this route in this time was higher, at £549 round-trip. British Airways operates 3 flights out of Portland into London in an average week, so prices vary by time and availability. 7,520 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
Gatwick
Maidstone
Slough
Canterbury
Southend-on-Sea
Ipswich
Ilford
Guildford
Dover
Colchester
Chelmsford
Hayes
Worthing
Ramsgate
Dartford
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