Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

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 24/3. 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

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Portland to London

Cheap return flights

Enter your travel dates to find the best prices.
British Airways Logo
06:00 - 10:25
PDX
-
LHR
20h 25m1 stop
British Airways Logo
15:40 - 17:40
LHR
-
PDX
10h 00mdirect
£475British Airways
Fri, 23 Jan - Tue, 5 May
Virgin Atlantic Logo
07:00 - 06:20
PDX
-
LHR
15h 20m1 stop
Virgin Atlantic Logo
17:50 - 11:25
LHR
-
PDX
25h 35m1 stop
£477Virgin Atlantic
Sun, 18 Jan - Sat, 24 Jan
United Airlines Logo
09:50 - 11:50
PDX
-
LHR
18h 00m1 stop
United Airlines Logo
14:30 - 18:30
LHR
-
PDX
35h 00m1 stop
£477United Airlines
Wed, 4 Mar - Sun, 8 Mar
United Airlines Logo
13:24 - 07:10
PDX
-
LHR
33h 46m3 stops
United Airlines Logo
16:40 - 18:10
LHR
-
PDX
33h 30m2 stops
£478United Airlines
Mon, 2 Feb - Mon, 9 Feb
British Airways Logo
19:30 - 13:00
PDX
-
LHR
9h 30mdirect
British Airways Logo
10:05 - 22:49
LHR
-
PDX
20h 44m1 stop
£479British Airways
Thu, 9 Apr - Wed, 29 Apr
Virgin Atlantic Logo
13:25 - 16:35
PDX
-
LCY
19h 10m1 stop
Virgin Atlantic Logo
17:50 - 11:25
LCY
-
PDX
25h 35m1 stop
£479Virgin Atlantic
Mon, 23 Feb - Tue, 3 Mar
Air Canada Logo
15:15 - 13:20
PDX
-
LHR
14h 05m1 stop
Air Canada Logo
15:05 - 12:26
LHR
-
PDX
29h 21m2 stops
£480Air Canada
Mon, 20 Apr - Tue, 28 Apr
Icelandair Logo
15:45 - 10:55
PDX
-
LGW
12h 10m1 stop
Icelandair Logo
11:55 - 18:00
LGW
-
PDX
13h 05m1 stop
£480Icelandair
Sat, 14 Mar - Fri, 20 Mar
Air Canada Logo
15:15 - 11:50
PDX
-
LHR
13h 35m1 stop
Air Canada Logo
14:05 - 14:40
LHR
-
PDX
32h 35m2 stops
£480Air Canada
Sun, 22 Mar - Mon, 30 Mar
Icelandair Logo
15:30 - 11:45
PDX
-
LGW
12h 15m1 stop
Icelandair Logo
15:40 - 17:55
LGW
-
PDX
34h 15m1 stop
£480Icelandair
Mon, 4 May - Thu, 28 May

British Airways flights from Portland to London

Our best British Airways deals on Portland to London flight tickets
British Airways
23 Jan
PDX06:00Portland
20h 25m
1 stop
LHR10:25London Heathrow
5 May
LHR15:40London Heathrow
10h 00m
PDX17:40Portland
£475
Find similar
British Airways
4 Mar
PDX17:45Portland
9h 35m
LHR11:20London Heathrow
8 Mar
LHR13:45London Heathrow
10h 10m
PDX16:55Portland
£477
Find similar
British Airways
9 Apr
PDX19:30Portland
9h 30m
LHR13:00London Heathrow
16 Apr
LHR12:15London Heathrow
18h 17m
1 stop
PDX22:32Portland
£479
Find similar

Air Canada flights from Portland to London

Our best Air Canada deals on Portland to London flight tickets
Air Canada
20 Apr
PDX15:15Portland
14h 05m
1 stop
LHR13:20London Heathrow
28 Apr
LHR15:05London Heathrow
29h 21m
2 stops
PDX12:26Portland
£480
Find similar
Air Canada
22 Mar
PDX15:15Portland
13h 35m
1 stop
LHR11:50London Heathrow
30 Mar
LHR14:05London Heathrow
32h 35m
2 stops
PDX14:40Portland
£480
Find similar
Air Canada
19 Mar
PDX19:05Portland
31h 15m
2 stops
LHR09:20London Heathrow
27 Mar
LHR18:00London Heathrow
27h 40m
2 stops
PDX14:40Portland
£483
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 8 January 2026.
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

Fri 23/1

06:00-10:25

1 stop20h 25m

London Heathrow

Tue 5/5

15:40-17:40

Nonstop10h 00m

£475

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 18/1

07:00-06:20

1 stop15h 20m

London Heathrow

Sat 24/1

17:50-11:25

1 stop25h 35m

£477

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 4/3

09:50-11:50

1 stop18h 00m

London Heathrow

Sun 8/3

14:30-18:30

1 stop35h 00m

£477

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 2/2

13:24-07:10

3 stops33h 46m

London Heathrow

Mon 9/2

16:40-18:10

2 stops33h 30m

£478

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 9/4

19:30-13:00

Nonstop9h 30m

London Heathrow

Wed 29/4

10:05-22:49

1 stop20h 44m

£479

PortlandLondon

PDX - LCY

PDXLCY

Portland

Mon 23/2

13:25-16:35

1 stop19h 10m

London City

Tue 3/3

17:50-11:25

1 stop25h 35m

£479

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 20/4

15:15-13:20

1 stop14h 05m

London Heathrow

Tue 28/4

15:05-12:26

2 stops29h 21m

£480

PortlandLondon

PDX - LGW

PDXLGW

Portland

Sat 14/3

15:45-10:55

1 stop12h 10m

London Gatwick

Fri 20/3

11:55-18:00

1 stop13h 05m

£480

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 22/3

15:15-11:50

1 stop13h 35m

London Heathrow

Mon 30/3

14:05-14:40

2 stops32h 35m

£480

PortlandLondon

PDX - LGW

PDXLGW

Portland

Mon 4/5

15:30-11:45

1 stop12h 15m

London Gatwick

Thu 28/5

15:40-17:55

1 stop34h 15m

£480

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 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 £478, 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 £489.

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 £456. 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 £551.

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 £510. Flights in the afternoon are often more expensive, with an average ticket price of £560.

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 £619 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 £552 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 7% 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 January 2026, prices for Portland to London flights are approximately 12% 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

£295

Fastest flight time

9h 30m

Direct flights

Every day

Airports in London

6 airports
The best one-way flight to London from Portland in the past 72 hours is £295. The best return flight deal from Portland to London found on momondo in the last 72 hours is £1,354.
The fastest flight from Portland to London takes 9h 30m
Direct flights go from Portland to London every day.
There are 6 airports in London. From Portland there are direct flights to 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 30m.

  • 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 £381Free CancellationRating
6.7
7,657 reviews
Search British Airways flights
IberiaPriceFrom £430Free CancellationRating
7.0
3,076 reviews
Search Iberia flights
IcelandairPriceFrom £437Free CancellationRating
7.1
593 reviews
Search Icelandair 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 £430 round-trip, up to an average price of £516. 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 £381, round-trip. It should be noted that an average British Airways flight deal for this route in this time was higher, at £536 round-trip. British Airways operates 3 flights out of Portland into London in an average week, so prices vary by time and availability. 7,657 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
Southend-on-Sea
Canterbury
Ipswich
Ilford
Guildford
Chelmsford
Hayes
Dover
Worthing
Hounslow
Colchester
Bedford
Ramsgate
Folkestone

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.

An easier way to manage your London trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 7/2
Sat 14/2
By creating a price alert you accept our terms of use and privacy policy.

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