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Cheap flights from Portland to London Heathrow Airport from £193

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 21/4. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
10 Apr — 17 Apr1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Portland to London Heathrow are usually found in October or January, booked 72 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 11 March 2026.

Sat 3/1015:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Sat 10/1021:25
LHR
-
PDX
1 stop28h 30m
Icelandair
Deal found 8/3£453
Tue 14/415:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Tue 28/421:25
LHR
-
PDX
1 stop28h 35m
Icelandair
Deal found 7/3£458
Tue 21/415:30
PDX
-
LHR
1 stop20h 50m
Icelandair
Tue 28/421:25
LHR
-
PDX
1 stop28h 35m
Icelandair
Deal found 8/3£458
Tue 14/415:30
PDX
-
LHR
1 stop20h 50m
Icelandair
Tue 21/421:25
LHR
-
PDX
1 stop28h 35m
Icelandair
Deal found 6/3£459
Thu 15/1015:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Sat 24/1021:25
LHR
-
PDX
1 stop28h 35m
Icelandair
Deal found 6/3£460
Tue 1/915:30
PDX
-
LHR
1 stop20h 50m
Icelandair
Wed 30/913:05
LHR
-
PDX
1 stop12h 50m
Icelandair
Deal found 8/3£461
Wed 23/915:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Mon 5/1021:25
LHR
-
PDX
1 stop28h 30m
Icelandair
Deal found 8/3£461
Mon 13/415:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Tue 21/421:25
LHR
-
PDX
1 stop28h 35m
Icelandair
Deal found 9/3£462
Tue 21/415:30
PDX
-
LHR
1 stop20h 50m
Icelandair
Wed 6/513:05
LHR
-
PDX
1 stop12h 55m
Icelandair
Deal found 8/3£463
Mon 20/415:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Tue 5/521:25
LHR
-
PDX
1 stop28h 35m
Icelandair
Deal found 7/3£463
Mon 13/415:30
PDX
-
LHR
1 stop20h 50m
Icelandair
Thu 30/421:25
LHR
-
PDX
1 stop28h 35m
Icelandair
Deal found 9/3£464
Wed 23/915:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Sat 3/1021:25
LHR
-
PDX
1 stop28h 30m
Icelandair
Deal found 6/3£465

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 11 March 2026.

Round-trip from

£458

One-way from

£193

Popular in

June

Cheapest in

October

Average price

£615

Good round-trip deal

£491 or less

Good one-way deal

£275 or less
Icelandair
  • Icelandair
  • 14/4-28/4
  • 2 total stops
  • 41h 00m total
  • Portland to London
Search Deals
21/4
  • 21/4
  • 2 total stops
  • 22h 10m total
  • Portland to London
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (£138 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£24 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 11 March 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

Tue 1/9

07:00-07:15

1 stop16h 15m

London Heathrow

Mon 7/9

19:15-11:10

1 stop23h 55m

£546

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 24/8

15:25-13:20

1 stop13h 55m

London Heathrow

Tue 1/9

09:30-00:47

2 stops23h 17m

£566

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 5/9

17:45-15:35

1 stop13h 50m

London Heathrow

Sat 12/9

08:55-21:35

2 stops20h 40m

£633

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 5/9

19:30-13:00

Nonstop9h 30m

London Heathrow

Sat 12/9

08:55-18:34

1 stop17h 39m

£673

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 24/8

20:59-20:20

2 stops15h 21m

London Heathrow

Fri 28/8

21:25-11:45

1 stop22h 20m

£680

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 14/4

13:05-21:35

3 stops24h 30m

London Heathrow

Thu 23/4

06:40-22:42

2 stops24h 02m

£691

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 16/5

23:03-20:10

1 stop13h 07m

London Heathrow

Sun 7/6

06:30-11:10

1 stop12h 40m

£732

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 5/9

10:00-17:40

2 stops23h 40m

London Heathrow

Sat 12/9

06:40-16:33

3 stops17h 53m

£742

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 22/4

13:05-21:20

3 stops24h 15m

London Heathrow

Wed 29/4

07:05-22:16

2 stops23h 11m

£748

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 5/9

17:35-15:05

1 stop13h 30m

London Heathrow

Mon 7/9

17:00-00:10

1 stop15h 10m

£796

Flights are sorted by cheapest return flights first.

Deals found on 10/3

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

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 6 March 2026.

The best time to book flights from Portland to London Heathrow Airport is 72 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, December is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of £385). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £634). 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 11 March 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.

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 11 March 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
7.1
Good
619 reviews
Check prices

Entertainment

7.0

Overall

7.1

Comfort

7.0

Food

6.2

Crew

8.0

Boarding

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

ZRH - KEF

Almost 7 hr flight and no ear buds provided and no food. I would choose a different airline next time for that reason.
Icelandair
7.1
Good
619 reviews
Icelandair
7.1
Good
619 reviews
Check prices

Entertainment

7.0

Overall

7.1

Comfort

7.0

Food

6.2

Crew

8.0

Boarding

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

ZRH - KEF

Almost 7 hr flight and no ear buds provided and no food. I would choose a different airline next time for that reason.
British Airways
6.7
Okay
7,781 reviews
Icelandair
7.1
Good
619 reviews
Check prices

Entertainment

7.0

Overall

7.1

Comfort

7.0

Food

6.2

Crew

8.0

Boarding

7.2

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

ZRH - KEF

Almost 7 hr flight and no ear buds provided and no food. I would choose a different airline next time for that reason.

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 3 outbound flights to London Heathrow per day.

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

    For as low as £633, Virgin Atlantic can have you in London Heathrow Airport from Portland in 13h 50m. 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 (£439), and British Airways (£440) offers the cheapest pricing from Portland to London Heathrow Airport. These flights start at 29% 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 (70%), Alaska Airlines (70%), Aer Lingus (70%).

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

    On average you can expect to pay £1,321 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is £189 while the most popular route, (Portland - London Heathrow) is currently priced at £458.

  • 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, December is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of £385). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £634). 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
Northampton
Luton
Hounslow
Slough
Gatwick
Ilford
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Chelmsford
Eastbourne
Ipswich
Swindon
Bedford

Browse thousands of different options on Cheapflights for your next trip

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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 11 March 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£439Average£447FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£440Average£538FlexibilityNo 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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