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$288+ Cheap flights from Portland (PDX) to Heathrow (LHR)

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 3/1. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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1. Tell us where you want to go

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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 Sunday or Tuesday and return on a Monday

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 October 29, 2025.

This KAYAK deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/42:45 pmPDX - LHR
1 stop20h 45mIcelandair
Mon 11/1712:15 pmLHR - PDX
1 stop12h 45mIcelandair
Deal found 10/27$544
This Gotogate deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/112:45 pmPDX - LHR
1 stop20h 45mIcelandair
Thu 12/188:35 pmLHR - PDX
1 stop28h 25mIcelandair
Deal found 10/27$550
This FlightHub deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/22:45 pmPDX - LHR
1 stop12h 05mIcelandair
Thu 12/188:35 pmLHR - PDX
1 stop28h 25mIcelandair
Deal found 10/27$563
This Cheapflightsfares deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/125:45 pmPDX - LHR
Nonstop9h 35mBritish Airways
Wed 11/191:45 pmLHR - PDX
Nonstop10h 10mBritish Airways
Deal found 10/28$579
This Delta deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/212:40 amPDX - LHR
1 stop22h 25mDelta
Wed 11/196:30 amLHR - PDX
1 stop12h 55mDelta
Deal found 10/27$580
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/51:30 pmPDX - LHR
1 stop13h 00mDelta
Wed 11/126:30 amLHR - PDX
1 stop12h 55mDelta
Deal found 10/28$583
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3112:00 pmPDX - LHR
1 stop12h 45mDelta
Fri 2/206:30 amLHR - PDX
1 stop12h 55mDelta
Deal found 10/28$586
This Delta deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/35:30 amPDX - LHR
2 stops17h 35mDelta
Fri 11/146:30 amLHR - PDX
1 stop12h 55mDelta
Deal found 10/27$587
This Mytrip deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:00 pmPDX - LHR
2 stops55h 10mMultiple Airlines
Mon 1/197:15 pmLHR - PDX
2 stops31h 15mMultiple Airlines
Deal found 10/29$588

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 October 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$545
(CrystalTravel)

One-way from

$288
(Mytrip)

Popular in

June

Cheapest in

October

Average price

$686

Good round-trip deal

$717 or less

Good one-way deal

$575 or less
Provider with most accurate pricing for Portland-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-London Heathrow flights.
Search Deals
From Portland to London Heathrow
Search Deals
One-way flight from Portland to London Heathrow
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($263 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($45 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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

 
Customize 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 2,558,603 searches. Data last updated October 29, 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 11/19

7:15 am-10:30 am

1 stop19h 15m

London Heathrow

Thu 12/4

6:20 am-4:08 pm

2 stops17h 48m

$591

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 1/14

2:36 pm-6:30 pm

2 stops19h 54m

London Heathrow

Thu 1/29

6:40 am-10:24 pm

2 stops23h 44m

$593

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 1/14

5:45 pm-11:20 am

Nonstop9h 35m

London Heathrow

Thu 1/29

12:30 pm-10:38 pm

1 stop18h 08m

$598

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 1/14

6:00 am-7:05 am

1 stop17h 05m

London Heathrow

Thu 1/29

6:20 am-8:32 pm

2 stops22h 12m

$599

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 12/30

1:45 pm-10:00 am

1 stop12h 15m

London Heathrow

Thu 2/19

10:45 am-4:31 pm

1 stop13h 46m

$599

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 1/27

12:40 am-7:05 am

1 stop22h 25m

London Heathrow

Wed 2/11

6:20 am-4:30 pm

2 stops18h 10m

$600

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 2/7

9:45 pm-7:50 am

1 stop26h 05m

London Heathrow

Fri 2/20

8:55 am-7:18 pm

1 stop18h 23m

$612

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 11/29

7:00 pm-11:50 am

1 stop32h 50m

London Heathrow

Thu 12/11

6:35 am-9:38 am

2 stops35h 03m

$619

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 12/31

5:30 am-10:30 am

1 stop21h 00m

London Heathrow

Thu 3/19

8:55 am-10:39 pm

1 stop20h 44m

$624

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 11/12

3:15 pm-11:50 am

1 stop12h 35m

London Heathrow

Mon 11/17

11:05 am-8:29 pm

2 stops41h 24m

$629

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 21 results
1
2
3

Compare providers for flights from Portland to Heathrow

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Heathrow in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland-London Heathrow Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland-London Heathrow Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Portland-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-London Heathrow Airport flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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 round-trip flight from Portland to Heathrow. Price data was last updated on October 24, 2025.

Booking 86 days in advance of your planned departure date is, on average, the best time to get cheap flights from Portland to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 $525). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of $811). 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 October 29, 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 in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 32% on airfare.

What is the cheapest day to fly from Portland to London Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from Portland to Heathrow. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Portland to London Heathrow Airport flight should consider departing on Monday afternoons when fares are most often at their lowest. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

The best insider tips for Portland to London Heathrow Airport flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Portland to London Heathrow Airport trip
Airports
PDX

Consider using the Express Lanes for expedited security at PDX, available to first and business class ticket holders and elite status members.

Read more about PDXby Brandon Schultz
LHR

Take the Heathrow Express for the fastest route into central London, arriving at Paddington Station with easy access to the tube.

Read more about LHRby Ramsey Qubein
Our travel experts
Brandon Schultz

Brandon Schultz

Expert on PDX

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on LHR

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

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 October 29, 2025.
Peruse reviews from past customers who have flown with Delta, American Airlines, and Icelandair from Portland to London Heathrow Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,993 reviews

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,993 reviews
Delta
7.9
Good
7,993 reviews

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,030 reviews
Delta
7.9
Good
7,993 reviews

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Icelandair
7.1
Good
562 reviews
Delta
7.9
Good
7,993 reviews

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Iberia
7.0
Good
3,001 reviews
Delta
7.9
Good
7,993 reviews

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
British Airways
6.7
Okay
7,487 reviews
Delta
7.9
Good
7,993 reviews

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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?

    Most people fly from Portland (PDX) if they book a flight from Portland to London Heathrow. On average, Portland has 2 outbound flights to London Heathrow per day from 13 airlines. Portland is conveniently located just 6.0 mi from Portland’s city center.

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

    Delta, Scandinavian Airlines, and Finnair can get you from Portland to London Heathrow Airport in just under 9h 35m. Your travel time can differ by up to 10h 19m. There are 4896 mi between Portland and London Heathrow Airport. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    According to our current data, Icelandair ($493), Delta ($552), and KLM ($561) offers the cheapest pricing from Portland to London Heathrow Airport. Icelandair is priced at 41% lower than the current average price of a flight leaving 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 (82%), Alaska Airlines (82%), Aer Lingus (82%).

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

    On average you can expect to pay $1,428 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is $414 while the most popular route, (Portland - London Heathrow) is currently priced at $492.

  • Where are the most common layover locations when flying from Portland to London Heathrow Airport?

    The most popular layover on flights from Portland to London Heathrow Airport is Seattle.

  • What are some popular things to do or see while on a layover in Seattle?

    Most Seattle visitors opt to spend their time experiencing Pike Place Market, Space Needle, and Seattle Waterfront. Pike Place Market, Space Needle, and Seattle Waterfront are located about 11.2 mi, 12.0 mi, and 10.9 mi, respectively from Seattle/Tacoma Intl. Travelers can book a car rental at Seattle/Tacoma Intl for about $57 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Portland to London Heathrow Airport flights?

    Portland to London Heathrow Airport flights that have layovers will least frequently stop in Reykjavik.

  • 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 vacation 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 $525). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of $811). 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

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Ilford
Hayes
Southend-on-Sea
Harrow
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Chipping Norton
Wembley
Folkestone

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from Portland to Heathrow

Discover the top 10 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 2,558,603 searches. Data last updated October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$493Average$688FlexibilityNo cancel feeOn-time76%
DeltaCheapest$552Average$873FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$561Average$669FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$567Average$782FlexibilityNo cancel feeOn-time72%
IberiaCheapest$577Average$789FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$594Average$846FlexibilityNo cancel feeOn-time70%
Alaska AirlinesCheapest$600Average$1,408FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$619Average$909FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$632Average$898FlexibilityNo cancel feeOn-time71%
FinnairCheapest$645Average$942FlexibilityNo cancel feeOn-time76%

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