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Cheap flights from Portland to London Heathrow Airport from £236

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 30/4. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
25 May — 1 Jun1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Portland to London Heathrow are usually found in January or February, booked 40 days in advance, depart on a Friday or Tuesday and return on a Wednesday

Cheap 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 25 April 2026.

Fri 22/519:05
PDX
-
LHR
3 stops30h 30m
Multiple Airlines
Fri 29/510:20
LHR
-
PDX
2 stops33h 25m
Multiple Airlines
Deal found 22/4£594
Fri 22/519:05
PDX
-
LHR
3 stops30h 30m
Multiple Airlines
Thu 28/517:00
LHR
-
PDX
2 stops32h 55m
Multiple Airlines
Deal found 22/4£605
Fri 5/619:05
PDX
-
LHR
3 stops30h 15m
Multiple Airlines
Fri 12/609:55
LHR
-
PDX
2 stops33h 50m
Multiple Airlines
Deal found 21/4£605
Mon 7/1210:00
PDX
-
LHR
2 stops23h 40m
Scandinavian Airlines
Tue 19/106:40
LHR
-
PDX
2 stops22h 47m
Scandinavian Airlines
Deal found 23/4£613
Wed 4/1113:50
PDX
-
LHR
1 stop14h 30m
Multiple Airlines
Sun 8/1115:15
LHR
-
PDX
2 stops50h 54m
Multiple Airlines
Deal found 20/4£615
Mon 7/1222:05
PDX
-
LHR
1 stop13h 55m
Virgin Atlantic
Tue 19/111:45
LHR
-
PDX
1 stop31h 40m
Virgin Atlantic
Deal found 23/4£626
Mon 7/1207:38
PDX
-
LHR
1 stop15h 12m
Finnair
Fri 22/113:45
LHR
-
PDX
Nonstop10h 10m
Finnair
Deal found 23/4£631

Find 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 25 April 2026.

Round-trip from

£594

One-way from

£236

Popular in

June

Cheapest in

January

Average price

£553

Good round-trip deal

£981 or less

Good one-way deal

£540 or less
22/5-29/5
  • 22/5-29/5
  • 5 total stops
  • 63h 55m total
  • Portland to London
Search Deals
30/4
  • 30/4
  • 2 total stops
  • 28h 55m total
  • Portland to London
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£155 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Portland to London Heathrow.
Search Deals
Price to beat on a one-way flight from Portland to London Heathrow.
Search Deals

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 25 April 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

Cheapest return flight

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 20/9

15:50-15:35

1 stop15h 45m

London Heathrow

Tue 29/9

11:45-11:10

1 stop31h 25m

£651

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 19/9

22:05-20:10

1 stop14h 05m

London Heathrow

Tue 6/10

20:55-11:10

1 stop22h 15m

£651

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 24/9

07:00-17:40

2 stops26h 40m

London Heathrow

Fri 2/10

21:05-18:41

3 stops29h 36m

£682

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 13/9

15:50-15:35

1 stop15h 45m

London Heathrow

Sun 20/9

06:30-11:10

1 stop12h 40m

£688

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 15/10

11:10-10:30

2 stops15h 20m

London Heathrow

Thu 22/10

06:30-11:10

1 stop12h 40m

£692

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 22/10

13:38-15:35

1 stop17h 57m

London Heathrow

Thu 29/10

08:40-21:53

2 stops20h 13m

£695

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 3/10

19:30-13:00

Nonstop9h 30m

London Heathrow

Sat 10/10

08:55-17:26

1 stop16h 31m

£750
Fastest return journey

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 21/9

19:30-13:00

Nonstop9h 30m

London Heathrow

Mon 5/10

15:40-17:40

Nonstop10h 00m

£754

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 17/8

09:40-12:10

1 stop18h 30m

London Heathrow

Sun 30/8

11:45-18:41

2 stops14h 56m

£758

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 29/8

17:45-15:35

1 stop13h 50m

London Heathrow

Sat 12/9

06:30-11:10

1 stop12h 40m

£768

Flights are sorted by cheapest return flights first.

Deals found on 21/4

Showing 1-10 of 20 resultsSorted by cheapest first
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?

The best time to book flights from Portland to London Heathrow Airport is 39 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, January is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of £509). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £954). 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 25 April 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portland to London Heathrow Airport as you normally would.

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 25 April 2026.
Get a feel of what it's like to fly with Icelandair and British 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
641 reviews
Check prices

Comfort

6.9

Overall

7.0

Boarding

7.2

Entertainment

6.9

Food

6.1

Crew

8.0

Reviews

1 / 20
10.0
Excellent

Ásmundur,Apr 2026

CDG - KEF

The flight was uneventfull and ahead of schedule. The crew was attentive and the service good.
Icelandair
7.0
Good
641 reviews
Icelandair
7.0
Good
641 reviews
Check prices

Comfort

6.9

Overall

7.0

Boarding

7.2

Entertainment

6.9

Food

6.1

Crew

8.0

Reviews

1 / 20
10.0
Excellent

Ásmundur,Apr 2026

CDG - KEF

The flight was uneventfull and ahead of schedule. The crew was attentive and the service good.
British Airways
6.7
Okay
7,914 reviews
Icelandair
7.0
Good
641 reviews
Check prices

Comfort

6.9

Overall

7.0

Boarding

7.2

Entertainment

6.9

Food

6.1

Crew

8.0

Reviews

1 / 20
10.0
Excellent

Ásmundur,Apr 2026

CDG - KEF

The flight was uneventfull and ahead of schedule. The crew was attentive and the service good.

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. 2 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 6 outbound flights to London Heathrow per day.

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

    For as low as £651, Delta can have you in London Heathrow Airport from Portland in 14h 05m. 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, Icelandair (£437), and British Airways (£439) offers the cheapest pricing from Portland to London Heathrow Airport. These flights start at 31% 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 (88%), Alaska Airlines (88%), Aer Lingus (88%).

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

    On average you can expect to pay £762 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is £540 while the most popular route, (Portland - London Heathrow) is currently priced at £636.

  • 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, January is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of £509). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £954). 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
Wembley
Croydon
Hounslow
Northampton
Luton
Gatwick
Ilford
Slough
Hayes
Brentford
Colchester
Watford
Kingston upon Thames
Romford
Eastbourne
Swindon
Ipswich
Southend-on-Sea
Guildford

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 2 airlines flying from Portland to Heathrow

Discover the top 2 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 25 April 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£437Average£445FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£439Average£735FlexibilityNo cancel feeOn-time70%
Search British Airways 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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