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Cheap flights from Portland to London from £250

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 16/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap return flights

Enter your travel dates to find the best prices.
Finnair Logo
17:45 - 11:20PDX-LHR
9h 35mdirect
Finnair Logo
13:45 - 15:55LHR-PDX
10h 10mdirect
£445Finnair
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Wed, 11 Feb - Fri, 20 Feb
British Airways Logo
18:45 - 11:20PDX-LHR
9h 35mdirect
British Airways Logo
15:40 - 17:40LHR-PDX
10h 00mdirect
£447British Airways
Find Deal
Mon, 16 Mar - Thu, 23 Apr
Multiple Airlines Logo
09:50 - 11:50PDX-LHR
18h 00m1 stop
Multiple Airlines Logo
07:40 - 18:30LHR-PDX
18h 50m2 stops
£448Multiple Airlines
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Wed, 14 Jan - Sun, 18 Jan
Iberia Logo
06:00 - 06:50PDX-LHR
16h 50m1 stop
Iberia Logo
13:45 - 15:55LHR-PDX
10h 10mdirect
£449Iberia
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Wed, 11 Feb - Fri, 20 Feb
British Airways Logo
13:57 - 12:15PDX-LHR
15h 18m1 stop
British Airways Logo
15:40 - 17:40LHR-PDX
10h 00mdirect
£451British Airways
Find Deal
Mon, 16 Mar - Thu, 23 Apr
Delta Logo
00:32 - 07:05PDX-LHR
22h 33m1 stop
Delta Logo
14:45 - 00:15LHR-PDX
17h 30m1 stop
£451Delta
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Mon, 8 Dec - Tue, 16 Dec
Scandinavian Airlines Logo
13:02 - 18:30PDX-LHR
21h 28m2 stops
Scandinavian Airlines Logo
06:40 - 22:24LHR-PDX
23h 44m2 stops
£452Scandinavian Airlines
Find Deal
Sun, 8 Feb - Sat, 21 Feb
Virgin Atlantic Logo
13:25 - 10:45PDX-LHR
13h 20m1 stop
Virgin Atlantic Logo
20:25 - 11:25LHR-PDX
23h 00m1 stop
£453Virgin Atlantic
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Wed, 21 Jan - Tue, 27 Jan
Multiple Airlines Logo
19:00 - 11:50PDX-LHR
32h 50m1 stop
Multiple Airlines Logo
14:30 - 09:15LHR-PDX
26h 45m1 stop
£455Multiple Airlines
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Tue, 3 Feb - Thu, 12 Feb
Scandinavian Airlines Logo
10:24 - 21:35PDX-LHR
27h 11m3 stops
Scandinavian Airlines Logo
06:40 - 22:10LHR-PDX
22h 30m2 stops
£455Scandinavian Airlines
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Mon, 2 Mar - Wed, 18 Mar

Virgin Atlantic flights from Portland to London Heathrow Airport

Our best Virgin Atlantic deals on Portland to London Heathrow Airport flight tickets
Virgin Atlantic
11 Feb
PDX07:00Portland
18h 20m
1 stop
LHR09:20London Heathrow
20 Feb
LHR06:30London Heathrow
12h 55m
1 stop
PDX11:25Portland
£445
Find similar
Virgin Atlantic
4 Dec
PDX06:15Portland
16h 35m
2 stops
LHR06:50London Heathrow
10 Dec
LHR06:30London Heathrow
12h 55m
1 stop
PDX11:25Portland
£480
Find similar

British Airways flights from Portland to London Heathrow Airport

Our best British Airways deals on Portland to London Heathrow Airport flight tickets
British Airways
16 Mar
PDX18:45Portland
9h 35m
LHR11:20London Heathrow
23 Apr
LHR15:40London Heathrow
10h 00m
PDX17:40Portland
£447
Find similar
British Airways
16 Mar
PDX13:57Portland
15h 18m
1 stop
LHR12:15London Heathrow
23 Apr
LHR15:40London Heathrow
10h 00m
PDX17:40Portland
£451
Find similar
British Airways
13 Apr
PDX19:30Portland
9h 30m
LHR13:00London Heathrow
30 Apr
LHR15:40London Heathrow
10h 00m
PDX17:40Portland
£458
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momondo Fare Finder

 
Customise your flight search to find flights from Portland to London Heathrow 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 279,928 searches. Data last updated 27 November 2025.
Use the filters below to find and compare flights from Portland to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 11/2

17:45-11:20

Nonstop9h 35m

London Heathrow

Fri 20/2

13:45-15:55

Nonstop10h 10m

£445

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 16/3

18:45-11:20

Nonstop9h 35m

London Heathrow

Thu 23/4

15:40-17:40

Nonstop10h 00m

£447

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 14/1

09:50-11:50

1 stop18h 00m

London Heathrow

Sun 18/1

07:40-18:30

2 stops18h 50m

£448

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 11/2

06:00-06:50

1 stop16h 50m

London Heathrow

Fri 20/2

13:45-15:55

Nonstop10h 10m

£449

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 16/3

13:57-12:15

1 stop15h 18m

London Heathrow

Thu 23/4

15:40-17:40

Nonstop10h 00m

£451

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 8/12

00:32-07:05

1 stop22h 33m

London Heathrow

Tue 16/12

14:45-00:15

1 stop17h 30m

£451

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 8/2

13:02-18:30

2 stops21h 28m

London Heathrow

Sat 21/2

06:40-22:24

2 stops23h 44m

£452

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 21/1

13:25-10:45

1 stop13h 20m

London Heathrow

Tue 27/1

20:25-11:25

1 stop23h 00m

£453

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 3/2

19:00-11:50

1 stop32h 50m

London Heathrow

Thu 12/2

14:30-09:15

1 stop26h 45m

£455

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 2/3

10:24-21:35

3 stops27h 11m

London Heathrow

Wed 18/3

06:40-22:10

2 stops22h 30m

£455

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 Heathrow Airport

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 Heathrow Airport?

What is the cheapest month to fly to London Heathrow Airport?

In general, October is the cheapest month to fly from Portland to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £516. The month of April is another great option to travel to London Heathrow Airport, with average flight prices from Portland averaging around £523.

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

On average, the least expensive day to fly to London Heathrow Airport from Portland is on a Friday. momondo users have found tickets for Friday departures for as low as £466. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Thursday is £563.

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

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Portland to London Heathrow Airport in the evening for as low as £518. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying at midday when prices are £716 on average. Flights to London Heathrow Airport from Portland at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

What is the cheapest Portland to London Heathrow flight route?

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

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

You are more likely to see cheaper flights to London Heathrow Airport from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £633 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Portland for as low as £580 on momondo.

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

There are 3 cabin classes available to choose from on Portland to London Heathrow 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 Heathrow Airport flights?

No. A direct flight is the cheapest option for a flight between Portland to London Heathrow Airport.

How have Portland to London Heathrow Airport flight prices changed over time?

As of November 2025, prices for Portland to London Heathrow Airport flights are approximately 43% cheaper when compared to flights at the same time last year.

When to book flights from Portland to London Heathrow Airport

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

Cheap Portland to London Heathrow Airport (PDX to LHR) flight deals and tips

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

Best price found

£3,225

Fastest flight time

9h 30m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from Portland in the past 72 hours is £3,225. The best return flight deal from Portland to London Heathrow Airport found on momondo in the last 72 hours is £1,384.
The fastest flight from Portland to London Heathrow Airport takes 9h 30m
Direct flights go from Portland to London Heathrow Airport every day.
Search flight deals

  • How far is Portland to London Heathrow by plane?

    Portland and London Heathrow are 4902.4 mi apart from one another. 9h 30m is a normal flight duration for this route.

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

    Prices for flights from Portland Airport to London Heathrow Airport refresh daily.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to London Heathrow Airport.

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

    The necessary travel and health documents for your London Heathrow Airport 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 Heathrow Airport?

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

Best airlines flying from Portland to London Heathrow Airport

Compare and see reviews for airlines that fly from Portland to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom £390Free CancellationRating
6.7
7,539 reviews
Search British Airways flights
IcelandairPriceFrom £447Free CancellationRating
7.0
581 reviews
Search Icelandair flights
IberiaPriceFrom £461Free CancellationRating
7.0
3,035 reviews
Search Iberia flights

  • Iberia Flights From Portland to London Heathrow Airport

    Iberia operates around 2 flights from Portland to London Heathrow Airport every week. The average price of these flights found in the last 72 hours has been £527, but momondo users have found Iberia deals from Portland to London Heathrow Airport from as low as £461 round-trip. Iberia has been scored 7.0/10 in 3,035 reviews.

  • British Airways Flights From Portland to London Heathrow Airport

    British Airways is also a popular choice for this route. British Airways flight deals for Portland to London Heathrow Airport start from as low as £390 round-trip, depending on your selected dates, with average British Airways deals seen on momondo around £548. British Airways operates 2 flights to London Heathrow Airport from Portland in an average week. Users have rated it 6.7/10 across 7,539 reviews.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
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Stratford-upon-Avon
Canterbury
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Ipswich
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Chelmsford
Colchester

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Portland to London . Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo enables you to select and highlight flights to London from Portland with this policy.

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

Once all potential Portland to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Portland to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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