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Cheap flights from Portland to London from £182

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 17/11. 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.
British Airways Logo
17:45 - 11:20PDX-LHR
9h 35mdirect
British Airways Logo
13:45 - 15:55LHR-PDX
10h 10mdirect
£424British Airways
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Mon, 3 Nov - Wed, 19 Nov
Multiple Airlines Logo
14:45 - 17:50PDX-LHR
19h 05m2 stops
Multiple Airlines Logo
07:50 - 17:00LHR-PDX
17h 10m2 stops
£425Multiple Airlines
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Thu, 4 Dec - Mon, 8 Dec
Virgin Atlantic Logo
17:25 - 12:50PDX-LHR
11h 25m1 stop
Virgin Atlantic Logo
06:30 - 11:25LHR-PDX
12h 55m1 stop
£425Virgin Atlantic
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Mon, 3 Nov - Wed, 19 Nov
Multiple Airlines Logo
15:15 - 11:50PDX-LHR
12h 35m1 stop
Multiple Airlines Logo
06:35 - 18:30LHR-PDX
19h 55m2 stops
£431Multiple Airlines
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Wed, 12 Nov - Tue, 18 Nov
Iberia Logo
17:45 - 11:20PDX-LHR
9h 35mdirect
Iberia Logo
19:40 - 11:45LHR-PDX
24h 05m2 stops
£431Iberia
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Mon, 12 Jan - Wed, 21 Jan
Lufthansa Logo
12:55 - 09:40PDX-LHR
12h 45m1 stop
Lufthansa Logo
06:30 - 18:30LHR-PDX
20h 00m2 stops
£434Lufthansa
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Wed, 26 Nov - Wed, 3 Dec
Iberia Logo
17:45 - 11:20PDX-LHR
9h 35mdirect
Iberia Logo
13:45 - 15:55LHR-PDX
10h 10mdirect
£441Iberia
Find Deal
Mon, 12 Jan - Wed, 21 Jan
Virgin Atlantic Logo
09:59 - 08:45PDX-LHR
14h 46m2 stops
Virgin Atlantic Logo
06:30 - 11:25LHR-PDX
12h 55m1 stop
£442Virgin Atlantic
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Wed, 12 Nov - Wed, 19 Nov
Lufthansa Logo
09:50 - 10:10PDX-LHR
16h 20m2 stops
Lufthansa Logo
07:40 - 18:30LHR-PDX
18h 50m2 stops
£449Lufthansa
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Tue, 4 Nov - Tue, 18 Nov
Icelandair Logo
14:45 - 10:50PDX-LHR
12h 05m1 stop
Icelandair Logo
12:15 - 17:00LHR-PDX
12h 45m1 stop
£464Icelandair
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Sat, 8 Nov - Fri, 28 Nov

SWISS flights from Portland to London Heathrow Airport

Our best SWISS deals on Portland to London Heathrow Airport flight tickets
SWISS
29 Oct
PDX10:52Portland
19h 08m
2 stops
LHR13:00London Heathrow
4 Nov
LHR09:00London Heathrow
21h 36m
2 stops
PDX22:36Portland
£458
Find similar
SWISS
23 Oct
PDX10:46Portland
18h 14m
2 stops
LHR13:00London Heathrow
17 Nov
LHR20:05London Heathrow
34h 31m
2 stops
PDX22:36Portland
£496
Find similar

Lufthansa flights from Portland to London Heathrow Airport

Our best Lufthansa deals on Portland to London Heathrow Airport flight tickets
Lufthansa
26 Nov
PDX12:55Portland
12h 45m
1 stop
LHR09:40London Heathrow
3 Dec
LHR06:30London Heathrow
20h 00m
2 stops
PDX18:30Portland
£434
Find similar
Lufthansa
22 Oct
PDX15:25Portland
13h 55m
1 stop
LHR13:20London Heathrow
14 Nov
LHR07:40London Heathrow
18h 50m
2 stops
PDX18:30Portland
£443
Find similar
Lufthansa
4 Nov
PDX09:50Portland
16h 20m
2 stops
LHR10:10London Heathrow
18 Nov
LHR07:40London Heathrow
18h 50m
2 stops
PDX18:30Portland
£449
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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 15 October 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

Mon 3/11

17:45-11:20

Nonstop9h 35m

London Heathrow

Wed 19/11

13:45-15:55

Nonstop10h 10m

£424

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 4/12

14:45-17:50

2 stops19h 05m

London Heathrow

Mon 8/12

07:50-17:00

2 stops17h 10m

£425

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 3/11

17:25-12:50

1 stop11h 25m

London Heathrow

Wed 19/11

06:30-11:25

1 stop12h 55m

£425

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 12/11

15:15-11:50

1 stop12h 35m

London Heathrow

Tue 18/11

06:35-18:30

2 stops19h 55m

£431

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 12/1

17:45-11:20

Nonstop9h 35m

London Heathrow

Wed 21/1

19:40-11:45

2 stops24h 05m

£431

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 26/11

12:55-09:40

1 stop12h 45m

London Heathrow

Wed 3/12

06:30-18:30

2 stops20h 00m

£434

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 12/1

17:45-11:20

Nonstop9h 35m

London Heathrow

Wed 21/1

13:45-15:55

Nonstop10h 10m

£441

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 12/11

09:59-08:45

2 stops14h 46m

London Heathrow

Wed 19/11

06:30-11:25

1 stop12h 55m

£442

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 4/11

09:50-10:10

2 stops16h 20m

London Heathrow

Tue 18/11

07:40-18:30

2 stops18h 50m

£449

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 8/11

14:45-10:50

1 stop12h 05m

London Heathrow

Fri 28/11

12:15-17:00

1 stop12h 45m

£464

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 £515. The month of April is another great option to travel to London Heathrow Airport, with average flight prices from Portland averaging around £519.

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 £462. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £789.

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 £522. 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 £711 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 £631 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 £553 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 October 2025, prices for Portland to London Heathrow Airport flights are approximately 22% 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

£3,199

Fastest flight time

9h 35m

Direct flights

Mon, Tue, Wed, Thu and Sat
The best one-way flight to London Heathrow Airport from Portland in the past 72 hours is £3,199. The best return flight deal from Portland to London Heathrow Airport found on momondo in the last 72 hours is £520.
The fastest flight from Portland to London Heathrow Airport takes 9h 35m
Direct flights go from Portland to London Heathrow Airport on Monday, Tuesday, Wednesday, Thursday and Saturday. There are no airlines offering direct flights..
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 35m 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 £387Free CancellationRating
6.7
7,456 reviews
Search British Airways flights
IcelandairPriceFrom £443Free CancellationRating
7.0
556 reviews
Search Icelandair flights
IberiaPriceFrom £458Free CancellationRating
7.0
2,990 reviews
Search Iberia flights
Virgin AtlanticPriceFrom £495Free CancellationRating
7.4
667 reviews
Search Virgin Atlantic flights

  • Iberia Flights From Portland to London Heathrow Airport

    Iberia operates around 7 flights from Portland to London Heathrow Airport every week. The average price of these flights found in the last 72 hours has been £695, but momondo users have found Iberia deals from Portland to London Heathrow Airport from as low as £609 round-trip. Iberia has been scored 7.0/10 in 2,990 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 £514 round-trip, depending on your selected dates, with average British Airways deals seen on momondo around £723. British Airways operates 7 flights to London Heathrow Airport from Portland in an average week. Users have rated it 6.7/10 across 7,456 reviews.

Travelling to a place near London?

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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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