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Cheap flights from Portland to London Heathrow Airport from £250

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 16/3. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
27 Dec — 3 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Portland to London Heathrow are usually found in October or April, booked 86 days in advance, depart on a Friday or Wednesday and return on a Wednesday

Cheap flight deals from Portland to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 27 November 2025.

Round-trip from

£445

One-way from

£250

Popular in

June

Cheapest in

October

Average price

£544

Good round-trip deal

£1,384 or less

Good one-way deal

£3,225 or less
Finnair
  • Finnair
  • 11/2-20/2
  • Nonstop
  • 19h 45m total
  • Portland to London
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Icelandair
  • Icelandair
  • 16/3
  • 1 total stop
  • 12h 05m total
  • Portland to London
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£153 potential increase over avg. return price).
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Cheapest flight prices on average. 5% potential price decrease (£27 potential savings vs. average return price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Portland to London Heathrow.
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Price to beat on a one-way flight from Portland to London Heathrow.
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Find flight deals from Portland to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Portland to Heathrow
Explore the most affordable flight options available from Portland to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 November 2025.

Wed 3/1206:15PDX - LHR
1 stop16h 50mDelta
Wed 10/1211:30LHR - PDX
2 stops18h 40mDelta
Deal found 25/11£446
Mon 8/1200:32PDX - LHR
1 stop22h 33mDelta
Tue 16/1214:45LHR - PDX
1 stop17h 30mDelta
Deal found 26/11£451
Mon 8/1214:45PDX - LHR
1 stop12h 05mIcelandair
Tue 16/1220:35LHR - PDX
1 stop28h 25mIcelandair
Deal found 25/11£463
Mon 8/1214:45PDX - LHR
1 stop12h 05mIcelandair
Sun 14/1220:35LHR - PDX
1 stop28h 25mIcelandair
Deal found 24/11£474
Thu 4/1211:35PDX - LHR
1 stop14h 55mKLM
Wed 10/1206:30LHR - PDX
1 stop12h 55mKLM
Deal found 25/11£477
Thu 4/1206:15PDX - LHR
2 stops16h 35mVirgin Atlantic
Wed 10/1206:30LHR - PDX
1 stop12h 55mVirgin Atlantic
Deal found 25/11£480
Wed 3/1212:00PDX - LHR
1 stop14h 00mBritish Airways
Wed 10/1213:45LHR - PDX
Nonstop10h 10mBritish Airways
Deal found 25/11£481
Tue 30/1212:54PDX - LHR
1 stop12h 46mLufthansa
Sun 8/207:30LHR - PDX
2 stops23h 02mLufthansa
Deal found 26/11£483
Tue 30/1219:00PDX - LHR
2 stops31h 10mMultiple Airlines
Sun 8/209:00LHR - PDX
2 stops21h 32mMultiple Airlines
Deal found 26/11£484
Wed 24/1209:50PDX - LHR
1 stop18h 00mMultiple Airlines
Wed 21/114:30LHR - PDX
2 stops30h 03mMultiple Airlines
Deal found 26/11£487
Thu 4/1209:50PDX - LHR
2 stops16h 20mLufthansa
Wed 10/1209:30LHR - PDX
2 stops23h 07mLufthansa
Deal found 25/11£489

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portland to Heathrow 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, Cheapflights users made 858,174 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

Portland

Fly to

Heathrow

Route

Depart

Return

Price

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 4/3

07:00-10:15

1 stop19h 15m

London Heathrow

Fri 20/3

06:30-12:25

1 stop12h 55m

£445

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

Wed 11/2

07:00-09:20

1 stop18h 20m

London Heathrow

Fri 20/2

06:30-11:25

1 stop12h 55m

£445

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

Tue 20/1

13:02-18:30

2 stops21h 28m

London Heathrow

Fri 30/1

07:05-22:20

3 stops23h 15m

£455

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 1/4

06:30-13:30

1 stop23h 00m

London Heathrow

Wed 8/4

06:30-11:10

1 stop12h 40m

£457

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 27/4

19:30-13:00

Nonstop9h 30m

London Heathrow

Wed 13/5

15:40-17:40

Nonstop10h 00m

£458

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 4/3

13:02-21:35

3 stops24h 33m

London Heathrow

Fri 20/3

06:40-22:10

3 stops22h 30m

£461

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 16/3

06:00-07:05

1 stop18h 05m

London Heathrow

Thu 23/4

08:40-18:41

2 stops18h 01m

£464

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 16/3

15:45-19:30

1 stop20h 45m

£250

Flights are sorted by cheapest return flights first.

Deals found on 25/11

Showing 1-10 of 19 results
1
2

Best time to book a flight from Portland to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Portland with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to London Heathrow Airport

How far ahead should I book a flight from Portland to London Heathrow Airport?

Use this chart to determine the optimal time to book a return flight from Portland to Heathrow. Price data was last updated on 21 November 2025.

The best time to book flights from Portland to London Heathrow Airport is 86 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Portland to London Heathrow Airport?

Currently, October is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of £398). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £613). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PDX to LHR?

Find hourly flight availability from Portland to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 27 November 2025.

One of the essential ways to save on airfare from Portland to London Heathrow Airport is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the evening could potentially save you up to 27% on airfare.

How much does it cost for a return flight from Portland to London Heathrow Airport?

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 27 November 2025.
Get a feel of what it's like to fly with Icelandair, Iberia, andBritish Airways from Portland to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Icelandair
7.0
Good
581 reviews
Check prices

Food

6.2

Boarding

7.1

Comfort

6.9

Crew

8.0

Entertainment

7.0

Overall

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Nov 2025

AMS - KEF

We paid a total of 328.00 for specific seats and we were not assigned to any of the seats for which we paid.
Icelandair
7.0
Good
581 reviews
Icelandair
7.0
Good
581 reviews
Check prices

Food

6.2

Boarding

7.1

Comfort

6.9

Crew

8.0

Entertainment

7.0

Overall

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Nov 2025

AMS - KEF

We paid a total of 328.00 for specific seats and we were not assigned to any of the seats for which we paid.
Iberia
7.0
Good
3,035 reviews
Icelandair
7.0
Good
581 reviews
Check prices

Food

6.2

Boarding

7.1

Comfort

6.9

Crew

8.0

Entertainment

7.0

Overall

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Nov 2025

AMS - KEF

We paid a total of 328.00 for specific seats and we were not assigned to any of the seats for which we paid.
British Airways
6.7
Okay
7,539 reviews
Icelandair
7.0
Good
581 reviews
Check prices

Food

6.2

Boarding

7.1

Comfort

6.9

Crew

8.0

Entertainment

7.0

Overall

7.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Nov 2025

AMS - KEF

We paid a total of 328.00 for specific seats and we were not assigned to any of the seats for which we paid.

Related info for your journey

Find useful and relevant information for your journey from Portland to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Portland to London Heathrow?

    Portland (PDX), located 6.0 mi from the city center, is the airport you fly out of when you book flights from Portland to London Heathrow. 3 airlines have flights from Portland to London Heathrow on a regular basis. Booking flights from Portland to London Heathrow should not be difficult; the airport handles an average of 2 outbound flights to London Heathrow per day.

  • How long is the flight from Portland to London Heathrow Airport?

    For as low as £445, Virgin Atlantic can have you in London Heathrow Airport from Portland in 9h 35m. The distance between Portland and London Heathrow Airport is about 4896 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Portland to London Heathrow Airport round-trip?

    According to our current data, British Airways (£390), Icelandair (£447), and Iberia (£461) offers the cheapest pricing from Portland to London Heathrow Airport. These flights start at 38% lower than the current average price 3 months from now.

  • What are the most reliable airlines from Portland to London Heathrow Airport?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Portland to London Heathrow Airport on time: American Airlines (77%), Alaska Airlines (77%), Finnair (77%).

  • What are the cheapest flights from Portland to London Heathrow Airport?

    On average you can expect to pay £2,314 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is £1,383 while the most popular route, (Portland - London Heathrow) is currently priced at £383.

  • Can I find deals for flights from Portland to Heathrow that include hotel bookings?

    Yes. In addition to deals on Portland to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Portland to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Heathrow.

  • Can I find deals for business class flights from Portland to Heathrow?

    Yes. Cheapflights offers flight deals from Portland to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portland to London Heathrow Airport?

    Currently, October is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of £398). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £613). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Slough
Croydon
Hounslow
Northampton
Gatwick
Luton
Ilford
Wembley
Deal
Hayes
Colchester
Watford
Brentford
Winchester
Swindon
Crawley
Romford
Chichester
Bedford

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Portland to Heathrow

Discover the top 3 airlines that operate flights from Portland to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 27 November 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£390Average£548FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IcelandairCheapest£447Average£455FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£461Average£527FlexibilityNo cancel feeOn-time77%
Search Iberia flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portland to Heathrow?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Portland to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Portland to Heathrow?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Heathrow from Portland.

Can Cheapflights find flights from Portland to Heathrow with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Portland to Heathrow flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Portland to Heathrow become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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