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Heathrow

$321+ 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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Find cheap flights from Portland to Heathrow with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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

Cheap 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 January 21, 2026.

This oojo deal was found by Cheapflights users on 1/21. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/313:30 pm
PDX
-
LHR
1 stop12h 25m
Icelandair
Tue 4/79:25 pm
LHR
-
PDX
1 stop28h 35m
Icelandair
Deal found 1/21$595
This British Airways deal was found by Cheapflights users on 1/21. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/106:00 am
PDX
-
LHR
1 stop16h 55m
British Airways
Wed 2/251:45 pm
LHR
-
PDX
Nonstop10h 10m
British Airways
Deal found 1/21$596
This Air Canada deal was found by Cheapflights users on 1/19. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/83:15 pm
PDX
-
LHR
1 stop13h 35m
Air Canada
Fri 3/201:25 pm
LHR
-
PDX
2 stops26h 50m
Air Canada
Deal found 1/19$597
This British Airways deal was found by Cheapflights users on 1/20. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/86:00 am
PDX
-
LHR
1 stop16h 55m
British Airways
Fri 3/61:45 pm
LHR
-
PDX
Nonstop10h 10m
British Airways
Deal found 1/20$598
This Cheapflightsfares deal was found by Cheapflights users on 1/20. 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.
Tue 2/312:35 pm
PDX
-
LHR
1 stop15h 05m
British Airways
Fri 2/133:45 pm
LHR
-
PDX
1 stop16h 32m
British Airways
Deal found 1/20$599
This FlightHub deal was found by Cheapflights users on 1/19. 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 3/313:30 pm
PDX
-
LHR
1 stop12h 25m
Icelandair
Sat 4/119:25 pm
LHR
-
PDX
1 stop28h 35m
Icelandair
Deal found 1/19$600
This Cheapflightsfares deal was found by Cheapflights users on 1/19. 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.
Mon 2/99:50 am
PDX
-
LHR
2 stops16h 20m
Lufthansa
Mon 2/167:30 pm
LHR
-
PDX
2 stops31h 25m
Lufthansa
Deal found 1/19$601
This FlightHub deal was found by Cheapflights users on 1/19. 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 3/317:05 pm
PDX
-
LHR
2 stops29h 30m
Multiple Airlines
Tue 4/78:45 am
LHR
-
PDX
2 stops21h 44m
Multiple Airlines
Deal found 1/19$602
This British Airways deal was found by Cheapflights users on 1/20. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/95:45 pm
PDX
-
LHR
Nonstop9h 35m
British Airways
Thu 3/53:45 pm
LHR
-
PDX
1 stop16h 32m
British Airways
Deal found 1/20$603
This British Airways deal was found by Cheapflights users on 1/18. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/225:45 pm
PDX
-
LHR
Nonstop9h 35m
British Airways
Wed 3/42:10 pm
LHR
-
PDX
1 stop18h 07m
British Airways
Deal found 1/18$604
This Cheapflightsfares deal was found by Cheapflights users on 1/19. 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 4/11:52 pm
PDX
-
LHR
1 stop14h 18m
British Airways
Wed 4/83:40 pm
LHR
-
PDX
Nonstop10h 00m
British Airways
Deal found 1/19$605
This oojo deal was found by Cheapflights users on 1/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/1611:46 am
PDX
-
LHR
1 stop16h 49m
British Airways
Thu 4/233:40 pm
LHR
-
PDX
Nonstop10h 00m
British Airways
Deal found 1/19$606

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 January 21, 2026.

Most accurate provider

oojo
3 stars

Most trusted provider

oojo
3 stars

Round-trip from

$595
(oojo)

One-way from

$321
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$741

Good round-trip deal

$654 or less

Good one-way deal

$366 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 ($257 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 January 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

 
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 January 21, 2026.
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

Sun 2/8

7:38 am-11:40 am

1 stop20h 02m

London Heathrow

Wed 3/4

1:45 pm-3:55 pm

Nonstop10h 10m

$598

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 2/23

6:40 am-10:00 am

1 stop19h 20m

London Heathrow

Wed 3/4

1:45 pm-3:55 pm

Nonstop10h 10m

$598

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 2/11

6:00 am-8:15 am

1 stop18h 15m

London Heathrow

Wed 3/4

1:45 pm-3:55 pm

Nonstop10h 10m

$598

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 2/10

8:30 am-9:40 am

1 stop17h 10m

London Heathrow

Wed 2/25

12:05 pm-10:59 pm

1 stop18h 54m

$600

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 4/19

7:05 pm-9:40 am

1 stop30h 35m

London Heathrow

Tue 4/28

3:05 pm-9:15 am

1 stop26h 10m

$602

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 2/9

5:45 pm-11:20 am

Nonstop9h 35m

London Heathrow

Thu 3/5

3:45 pm-12:17 am

1 stop16h 32m

$603

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 2/8

12:35 pm-10:00 am

1 stop13h 25m

London Heathrow

Fri 3/6

10:05 am-7:16 pm

1 stop17h 11m

$608

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 3/24

3:15 pm-11:50 am

1 stop13h 35m

London Heathrow

Wed 4/1

2:50 pm-9:14 pm

1 stop14h 24m

$620

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 3/17

11:10 pm-7:10 am

2 stops25h 00m

London Heathrow

Wed 4/1

11:05 am-6:34 pm

1 stop15h 29m

$627

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 3/1

6:57 pm-9:40 am

1 stop30h 43m

London Heathrow

Sun 3/15

2:30 pm-9:15 am

1 stop25h 45m

$636

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 22 results
1
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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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
oojoPrice Accuracy3 starsTrust Score*3 stars

*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 oojo to be most consistent on Cheapflights vs. oojo Users can find the same prices on Portland-London Heathrow Airport flight deals on Cheapflights vs. oojo >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 oojo the most. oojo 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 January 16, 2026.

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, December is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of $517). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of $832). 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 January 21, 2026.

When flying from Portland to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Portland to London Heathrow Airport?

The best insider tips for Portland to London Heathrow Airport flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Portland to London Heathrow Airport trip
Our travel experts
Brandon Schultz

Brandon Schultz

Expert on PDX

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

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 January 21, 2026.
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
8,088 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,088 reviews
Delta
7.9
Good
8,088 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,174 reviews
Delta
7.9
Good
8,088 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Icelandair
7.1
Good
602 reviews
Delta
7.9
Good
8,088 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Iberia
7.0
Good
3,094 reviews
Delta
7.9
Good
8,088 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
British Airways
6.7
Okay
7,690 reviews
Delta
7.9
Good
8,088 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 3 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?

    British Airways and United Airlines can get you from Portland to London Heathrow Airport in just under 17h 10m. Your travel time can differ by up to 2h 52m. 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 ($490), Delta ($552), and Virgin Atlantic ($558) 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 cheapest airlines to fly from Portland to London Heathrow Airport one-way?

    One-way options have recently been found by users for as low as $192 on Icelandair. Other airlines that offer cheap prices include Virgin Atlantic from $378 and Iberia from $392 one-way.

  • 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%), Aer Lingus (77%).

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

    On average you can expect to pay $1,312 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is $257 while the most popular route, (Portland - London Heathrow) is currently priced at $496.

  • 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 $56 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, December is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of $517). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of $832). 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
Ilford
Hounslow
Southend-on-Sea
Harrow
Croydon
Eastleigh
Gatwick
Dartford
Dover
Winchester
Orpington
Watford
Northampton
Hayes
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames

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 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 January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$490Average$662FlexibilityNo cancel feeOn-time76%
DeltaCheapest$552Average$857FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$558Average$723FlexibilityNo cancel feeOn-time72%
KLMCheapest$561Average$659FlexibilityNo cancel feeOn-time75%
IberiaCheapest$577Average$795FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$583Average$840FlexibilityNo cancel feeOn-time70%
Alaska AirlinesCheapest$600Average$1,498FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$619Average$966FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$628Average$894FlexibilityNo cancel feeOn-time71%
FinnairCheapest$645Average$978FlexibilityNo cancel feeOn-time76%

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