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Cheap flights from Portland to London from £190

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 9/3. 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.
Lufthansa Logo
09:50 - 11:50
PDX
-
LHR
18h 00m
1 stop
Lufthansa Logo
11:10 - 00:34
LHR
-
PDX
21h 24m
2 stops
£432Lufthansa
Wed, 25 Feb - Wed, 4 Mar
Icelandair Logo
15:30 - 11:55
PDX
-
LHR
12h 25m
1 stop
Icelandair Logo
13:05 - 17:55
LHR
-
PDX
12h 50m
1 stop
£434Icelandair
Tue, 12 May - Mon, 18 May
Lufthansa Logo
09:50 - 10:10
PDX
-
LHR
16h 20m
2 stops
Lufthansa Logo
11:10 - 00:35
LHR
-
PDX
20h 25m
2 stops
£434Lufthansa
Mon, 2 Mar - Wed, 18 Mar
Icelandair Logo
15:30 - 20:20
PDX
-
LHR
20h 50m
1 stop
Icelandair Logo
21:25 - 18:00
LHR
-
PDX
28h 35m
1 stop
£436Icelandair
Tue, 31 Mar - Tue, 7 Apr
Icelandair Logo
15:30 - 11:55
PDX
-
LHR
12h 25m
1 stop
Icelandair Logo
13:05 - 18:00
LHR
-
PDX
12h 55m
1 stop
£439Icelandair
Mon, 6 Apr - Fri, 17 Apr
Lufthansa Logo
09:50 - 11:50
PDX
-
LHR
18h 00m
1 stop
Lufthansa Logo
06:30 - 18:55
LHR
-
PDX
20h 25m
2 stops
£441Lufthansa
Tue, 24 Feb - Tue, 3 Mar
Lufthansa Logo
10:10 - 13:20
PDX
-
LHR
19h 10m
1 stop
Lufthansa Logo
09:00 - 00:59
LHR
-
PDX
23h 59m
2 stops
£443Lufthansa
Wed, 6 May - Wed, 13 May
Lufthansa Logo
15:15 - 13:20
PDX
-
LHR
14h 05m
1 stop
Lufthansa Logo
06:30 - 19:05
LHR
-
PDX
20h 35m
2 stops
£444Lufthansa
Wed, 29 Apr - Tue, 12 May
Icelandair Logo
15:30 - 11:55
PDX
-
LHR
12h 25m
1 stop
Icelandair Logo
13:05 - 18:00
LHR
-
PDX
12h 55m
1 stop
£444Icelandair
Sat, 2 May - Wed, 6 May
Lufthansa Logo
15:15 - 13:20
PDX
-
LHR
14h 05m
1 stop
Lufthansa Logo
09:00 - 00:59
LHR
-
PDX
23h 59m
2 stops
£445Lufthansa
Mon, 27 Apr - Tue, 5 May

Lufthansa flights from Portland to London Heathrow Airport

Our best Lufthansa deals on Portland to London Heathrow Airport flight tickets
Lufthansa
25 Feb
PDX09:50Portland
18h 00m
1 stop
LHR11:50London Heathrow
4 Mar
LHR11:10London Heathrow
21h 24m
2 stops
PDX00:34Portland
£432
Lufthansa
2 Mar
PDX09:50Portland
16h 20m
2 stops
LHR10:10London Heathrow
18 Mar
LHR11:10London Heathrow
20h 25m
2 stops
PDX00:35Portland
£434
Lufthansa
24 Feb
PDX09:50Portland
18h 00m
1 stop
LHR11:50London Heathrow
3 Mar
LHR06:30London Heathrow
20h 25m
2 stops
PDX18:55Portland
£441

Delta flights from Portland to London Heathrow Airport

Our best Delta deals on Portland to London Heathrow Airport flight tickets
Delta
23 Feb
PDX07:00Portland
15h 20m
1 stop
LHR06:20London Heathrow
3 Mar
LHR08:40London Heathrow
34h 45m
1 stop
PDX11:25Portland
£450
Delta
24 Feb
PDX12:09Portland
15h 31m
1 stop
LHR11:40London Heathrow
19 Mar
LHR08:40London Heathrow
34h 45m
1 stop
PDX12:25Portland
£452
Delta
22 Feb
PDX00:40Portland
21h 40m
2 stops
LHR06:20London Heathrow
3 Mar
LHR10:00London Heathrow
33h 25m
1 stop
PDX11:25Portland
£454

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 29 January 2026.
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 25/2

09:50-11:50

1 stop18h 00m

London Heathrow

Wed 4/3

11:10-00:34

2 stops21h 24m

£432

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 12/5

15:30-11:55

1 stop12h 25m

London Heathrow

Mon 18/5

13:05-17:55

1 stop12h 50m

£434

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 2/3

09:50-10:10

2 stops16h 20m

London Heathrow

Wed 18/3

11:10-00:35

2 stops20h 25m

£434

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 31/3

15:30-20:20

1 stop20h 50m

London Heathrow

Tue 7/4

21:25-18:00

1 stop28h 35m

£436

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 6/4

15:30-11:55

1 stop12h 25m

London Heathrow

Fri 17/4

13:05-18:00

1 stop12h 55m

£439

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 24/2

09:50-11:50

1 stop18h 00m

London Heathrow

Tue 3/3

06:30-18:55

2 stops20h 25m

£441

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 6/5

10:10-13:20

1 stop19h 10m

London Heathrow

Wed 13/5

09:00-00:59

2 stops23h 59m

£443

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 29/4

15:15-13:20

1 stop14h 05m

London Heathrow

Tue 12/5

06:30-19:05

2 stops20h 35m

£444

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 2/5

15:30-11:55

1 stop12h 25m

London Heathrow

Wed 6/5

13:05-18:00

1 stop12h 55m

£444

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 27/4

15:15-13:20

1 stop14h 05m

London Heathrow

Tue 5/5

09:00-00:59

2 stops23h 59m

£445

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 £489. The month of April is another great option to travel to London Heathrow Airport, with average flight prices from Portland averaging around £489.

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 Sunday. momondo users have found tickets for Sunday departures for as low as £453. 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 £566.

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 £508. 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 in the afternoon when prices are £516 on average. Flights to London Heathrow Airport from Portland in the afternoon 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 £605 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 £539 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 January 2026, prices for Portland to London Heathrow Airport flights are approximately 41% more expensive 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

£288

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 £288. The best return flight deal from Portland to London Heathrow Airport found on momondo in the last 72 hours is £1,324.
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 £373Free CancellationRating
6.7
7,705 reviews
Search British Airways flights
IberiaPriceFrom £420Free CancellationRating
7.0
3,100 reviews
Search Iberia flights
IcelandairPriceFrom £427Free CancellationRating
7.1
606 reviews
Search Icelandair flights

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
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Swindon
Southend-on-Sea
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Ipswich
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Guildford
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Hayes
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Dover
Folkestone

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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