HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Heathrow

$281+ 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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Portland to London Heathrow are usually found in October or April, booked 49 days in advance, depart on a Tuesday or Wednesday and return on a Monday

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 July 29, 2025.

Round-trip from

$580
(Booking.com)

One-way from

$281
(Cheapflightsfares)

Popular in

June

Cheapest in

October

Average price

$1,085

Good round-trip deal

$673 or less

Good one-way deal

$468 or less
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 ($253 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($43 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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

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 July 29, 2025.

This Booking.com deal was found by Cheapflights users on 7/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/169:50 amPDX - LHR
1 stop18h 00mMultiple Airlines
Sun 11/237:40 amLHR - PDX
2 stops18h 50mMultiple Airlines
Deal found 7/29$580
This Ovago deal was found by Cheapflights users on 7/28. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/412:59 amPDX - LHR
1 stop21h 26mBritish Airways
Tue 8/128:20 amLHR - PDX
1 stop16h 28mBritish Airways
Deal found 7/28$581
This Lufthansa deal was found by Cheapflights users on 7/28. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1210:00 amPDX - LHR
2 stops17h 50mLufthansa
Wed 10/296:35 amLHR - PDX
2 stops25h 10mLufthansa
Deal found 7/28$588
This Air Canada deal was found by Cheapflights users on 7/27. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/173:25 pmPDX - LHR
1 stop13h 55mAir Canada
Fri 10/245:40 pmLHR - PDX
2 stops29h 50mAir Canada
Deal found 7/27$590
This KLM deal was found by Cheapflights users on 7/28. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/243:15 pmPDX - LHR
1 stop15h 00mKLM
Sun 8/316:30 amLHR - PDX
1 stop12h 30mKLM
Deal found 7/28$594
This SWISS deal was found by Cheapflights users on 7/28. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/228:30 amPDX - LHR
2 stops25h 20mSWISS
Thu 10/28:40 amLHR - PDX
2 stops18h 06mSWISS
Deal found 7/28$599
This United Airlines deal was found by Cheapflights users on 7/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/199:47 amPDX - LHR
1 stop13h 38mUnited Airlines
Tue 9/232:10 pmLHR - PDX
1 stop12h 36mUnited Airlines
Deal found 7/28$601
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/214:58 pmPDX - LHR
1 stop12h 12mDelta
Thu 8/2811:30 amLHR - PDX
2 stops20h 22mDelta
Deal found 7/29$602
This Cheapflightsfares deal was found by Cheapflights users on 7/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/163:20 pmPDX - LHR
1 stop21h 00mIcelandair
Mon 11/312:15 pmLHR - PDX
1 stop12h 45mIcelandair
Deal found 7/29$608
This Iberia deal was found by Cheapflights users on 7/28. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/282:20 pmPDX - LHR
1 stop32h 30mIberia
Sun 1/111:45 pmLHR - PDX
Nonstop10h 10mIberia
Deal found 7/28$612

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 July 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

Sun 11/16

9:50 am-11:50 am

1 stop18h 00m

London Heathrow

Sun 11/23

7:40 am-6:30 pm

2 stops18h 50m

$580

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 8/21

7:25 pm-1:00 pm

Nonstop9h 35m

London Heathrow

Tue 8/26

3:40 pm-5:35 pm

Nonstop9h 55m

$583

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 10/12

10:00 am-11:50 am

2 stops17h 50m

London Heathrow

Wed 10/29

6:35 am-12:45 am

2 stops25h 10m

$588

PortlandLondon

PDX - LHR

PDXLHR

Portland

Fri 10/17

3:25 pm-1:20 pm

1 stop13h 55m

London Heathrow

Fri 10/24

5:40 pm-3:30 pm

2 stops29h 50m

$590

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 8/24

5:45 pm-2:15 pm

1 stop12h 30m

London Heathrow

Sun 8/31

6:30 am-11:00 am

1 stop12h 30m

$594

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 9/22

8:30 am-5:50 pm

2 stops25h 20m

London Heathrow

Thu 10/2

8:40 am-6:46 pm

2 stops18h 06m

$599

PortlandLondon

PDX - LHR

PDXLHR

Portland

Fri 9/19

9:47 am-7:25 am

1 stop13h 38m

London Heathrow

Tue 9/23

2:10 pm-6:46 pm

1 stop12h 36m

$601

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 10/16

3:20 pm-8:20 pm

1 stop21h 00m

London Heathrow

Mon 11/3

12:15 pm-5:00 pm

1 stop12h 45m

$608

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 12/28

2:20 pm-6:50 am

1 stop32h 30m

London Heathrow

Mon 1/12

1:45 pm-3:55 pm

Nonstop10h 10m

$612

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 9/21

3:20 pm-8:20 pm

1 stop21h 00m

$281

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 12 results
1
2

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

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 July 25, 2025.

Booking 49 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, November is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of $661). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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 July 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 afternoon tend to be the most expensive. A flight at noon could potentially save you up to 16% 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. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 July 29, 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).

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 July 29, 2025.
Peruse reviews from past customers who have flown with Delta, SWISS, and United Airlines 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
8.0
Very good
7,977 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,977 reviews
Delta
8.0
Very good
7,977 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,683 reviews
Delta
8.0
Very good
7,977 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,893 reviews
Delta
8.0
Very good
7,977 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
WestJet
7.2
Good
2,973 reviews
Delta
8.0
Very good
7,977 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
9,822 reviews
Delta
8.0
Very good
7,977 reviews

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 7 outbound flights to London Heathrow per day from 13 airlines. Portland is conveniently located just 6.0 mi from Portland’s city center.

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

    According to our current data, British Airways ($583), Lufthansa ($588), and Air Canada ($590) offers the cheapest pricing from Portland to London Heathrow Airport. British Airways is priced at 30% 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 (80%), Alaska Airlines (80%), Aer Lingus (80%).

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

    On average you can expect to pay $2,253 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is $361 while the most popular route, (Portland - London Heathrow) is currently priced at $498.

  • 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 $81 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, November is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of $661). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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
Hayes
Thornton Heath
Harrow
Canterbury
Dover
Stratford-upon-Avon
Orpington
Watford
Northampton
Gatwick
Borehamwood
Dartford
Broadway
Aylesbury
Chelmsford
Folkestone
Southend-on-Sea
Chichester
Swindon

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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$491Average$694FlexibilityNo cancel feeOn-time76%
KLMCheapest$561Average$728FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$580Average$824FlexibilityNo cancel feeOn-time67%
IberiaCheapest$581Average$777FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$599Average$784FlexibilityNo cancel feeOn-time72%
DeltaCheapest$600Average$868FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$611Average$856FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$625Average$873FlexibilityNo cancel feeOn-time71%
FinnairCheapest$633Average$803FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$642Average$866FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.