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Cheap flights from Portland to London Heathrow Airport from £301

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 18/7. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
5 May — 12 May1
1 adult

Cheapflights Tip: The best prices from Portland to London Heathrow are usually found in April or October, booked 72 days in advance, depart on a Friday or Tuesday and return on a Tuesday

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 30 April 2025.

Round-trip from

£471

One-way from

£301

Popular in

June

Cheapest in

April

Average price

£517

Good round-trip deal

£509 or less

Good one-way deal

£356 or less
Icelandair
  • Icelandair
  • 19/9-26/9
  • 2 total stops
  • 25h 25m total
  • Portland to London
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Icelandair
  • Icelandair
  • 18/7
  • 1 total stop
  • 12h 35m total
  • Portland to London
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (£137 potential increase over avg. return price).
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Cheapest flight prices on average. 5% potential price decrease (£24 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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

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 30 April 2025.

Mon 13/1015:25PDX - LHR
1 stop13h 55mMultiple Airlines
Wed 22/1008:40LHR - PDX
2 stops18h 06mMultiple Airlines
Deal found 28/4£488
Sun 10/810:23PDX - LHR
1 stop12h 57mAmerican Airlines
Fri 29/815:40LHR - PDX
Nonstop9h 55mAmerican Airlines
Deal found 29/4£494
Sun 10/819:25PDX - LHR
Nonstop9h 35mIberia
Fri 29/815:40LHR - PDX
Nonstop9h 55mIberia
Deal found 29/4£496
Wed 27/815:20PDX - LHR
1 stop21h 00mIcelandair
Tue 9/913:05LHR - PDX
1 stop12h 50mIcelandair
Deal found 29/4£498
Tue 7/1010:00PDX - LHR
2 stops17h 50mLufthansa
Wed 15/1006:30LHR - PDX
2 stops20h 16mLufthansa
Deal found 29/4£505
Sun 12/1015:15PDX - LHR
1 stop12h 05mDelta
Mon 27/1006:20LHR - PDX
2 stops19h 53mDelta
Deal found 29/4£506
Sat 20/922:50PDX - LHR
2 stops23h 40mUnited Airlines
Wed 1/1006:30LHR - PDX
2 stops24h 26mUnited Airlines
Deal found 29/4£508
Tue 30/910:00PDX - LHR
2 stops17h 50mAir Canada
Tue 14/1006:00LHR - PDX
2 stops20h 46mAir Canada
Deal found 29/4£510
Wed 27/810:38PDX - LHR
1 stop14h 32mBritish Airways
Tue 9/915:40LHR - PDX
Nonstop9h 55mBritish Airways
Deal found 29/4£515
Mon 18/811:04PDX - LHR
2 stops23h 26mScandinavian Airlines
Tue 26/819:30LHR - PDX
2 stops29h 37mScandinavian Airlines
Deal found 29/4£526
Sat 4/1010:51PDX - LHR
2 stops45h 34mSWISS
Mon 13/1020:05LHR - PDX
2 stops30h 41mSWISS
Deal found 29/4£536
Tue 12/813:25PDX - LHR
1 stop15h 45mKLM
Sat 23/810:55LHR - PDX
1 stop15h 13mKLM
Deal found 29/4£573

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 30 April 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

Fri 19/9

15:20-11:55

1 stop12h 35m

London Heathrow

Fri 26/9

13:05-17:55

1 stop12h 50m

£471

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 13/10

15:25-13:20

1 stop13h 55m

London Heathrow

Wed 22/10

08:40-18:46

2 stops18h 06m

£488

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 10/8

10:23-07:20

1 stop12h 57m

London Heathrow

Fri 29/8

15:40-17:35

Nonstop9h 55m

£494

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 10/8

19:25-13:00

Nonstop9h 35m

London Heathrow

Fri 29/8

15:40-17:35

Nonstop9h 55m

£496

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 22/9

19:25-13:00

Nonstop9h 35m

London Heathrow

Fri 3/10

15:40-17:35

Nonstop9h 55m

£503

PortlandLondon

PDX - LHR

PDXLHR

Portland

Fri 10/10

12:15-10:15

1 stop14h 00m

London Heathrow

Thu 23/10

06:15-14:39

2 stops16h 24m

£507

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 20/9

22:50-06:30

2 stops23h 40m

London Heathrow

Wed 1/10

06:30-22:56

2 stops24h 26m

£508

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 30/9

10:00-11:50

2 stops17h 50m

London Heathrow

Tue 14/10

06:00-18:46

2 stops20h 46m

£510

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 22/10

07:00-09:35

2 stops18h 35m

London Heathrow

Tue 28/10

06:40-23:29

2 stops23h 49m

£514

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 8/10

15:25-13:20

1 stop13h 55m

London Heathrow

Wed 29/10

09:30-20:49

2 stops18h 19m

£522

Flights are sorted by cheapest return flights first.

Deals found on 29/4

Showing 1-10 of 25 results
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 25 April 2025.

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, January is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of £112). Flying from Portland to London Heathrow Airport in August is currently the most expensive (average of £164). 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 30 April 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 afternoon could potentially save you up to 21% on airfare.

Weekly flight availability from Portland to London Heathrow Airport

Explore weekly flight availability from Portland to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 30 April 2025.

The most flights from PDX to LHR are scheduled on a Monday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 30 April 2025.
Get a feel of what it's like to fly with Delta, KLM and SWISS from Portland to London by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,934 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,934 reviews
Delta
8.0
Very Good
7,934 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,334 reviews
Delta
8.0
Very Good
7,934 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,588 reviews
Delta
8.0
Very Good
7,934 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.4
Good
1,446 reviews
Delta
8.0
Very Good
7,934 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very Good
7,934 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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. 5 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 7 outbound flights to London Heathrow per day.

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

    According to our current data, Icelandair (£471), American Airlines (£494), and Iberia (£496) offers the cheapest pricing from Portland to London Heathrow Airport. These flights start at 27% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Portland to London Heathrow Airport one-way?

    For one-way options, check prices for Icelandair. According to our data, you can fly for as low as £301. Users have also found prices from £304 and £308 on Iberia and Delta, respectively.

  • 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 (78%), Alaska Airlines (78%), Aer Lingus (78%).

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

    On average you can expect to pay £1,391 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is £333 while the most popular route, (Portland - London Heathrow) is currently priced at £443.

  • 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 £112). Flying from Portland to London Heathrow Airport in August is currently the most expensive (average of £164). 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 Portland?

Book flights to Portland if you plan to visit one of these locations
Deal
Hounslow
Milton Keynes
Gatwick
Luton
Slough
Croydon
Eastbourne
Northampton
Ilford
Hayes
Southend-on-Sea
Crawley
Wembley
Ipswich
Maidstone
Winchester
Swindon
Folkestone
Dartford

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 5 airlines flying from Portland to Heathrow

Discover the top 5 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 30 April 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£438Average£2,414FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£439Average£504FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IberiaCheapest£454Average£519FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£513Average£764FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£559Average£686FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

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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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