Heathrow

$350+ 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
Mar 30 — Apr 61
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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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Cheapflights Tip: The best prices from Portland to London Heathrow are usually found in April or October, booked 64 days in advance, depart on a Tuesday or Wednesday and return on a Friday

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 March 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$608
(oojo)

One-way from

$350
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$751

Good round-trip deal

$742 or less

Good one-way deal

$546 or less
Provider with most accurate pricing for Portland-London Heathrow flight deals.
Provider most trusted by Cheapflights users for Portland-London Heathrow flights.
From Portland to London Heathrow
One-way flight from Portland to London Heathrow
Highest demand for flights based on searches. 22% potential increase in price ($250 potential increase over avg. RT price).
Cheapest flight prices on average. 5% potential price decrease ($42 potential savings vs. average RT price).
Average for round-trip flights in March 2025
Price to beat on a round-trip flight from Portland to London Heathrow.
Price to beat on a one-way flight from Portland to London Heathrow.

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 March 25, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 3/24. 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 8/197:25 pmPDX - LHR
Nonstop9h 35mIberia
Thu 8/283:40 pmLHR - PDX
Nonstop9h 55mIberia
Deal found 3/24$607
This oojo deal was found by Cheapflights users on 3/24. 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.
Thu 5/83:20 pmPDX - LHR
1 stop12h 35mIcelandair
Thu 5/151:05 pmLHR - PDX
1 stop12h 50mIcelandair
Deal found 3/24$608
This Gotogate deal was found by Cheapflights users on 3/24. 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.
Mon 4/73:25 pmPDX - LHR
1 stop13h 55mAir Canada
Tue 4/222:10 pmLHR - PDX
1 stop27h 25mAir Canada
Deal found 3/24$614
This FlightHub deal was found by Cheapflights users on 3/24. 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.
Wed 10/83:25 pmPDX - LHR
1 stop13h 55mMultiple Airlines
Wed 10/158:40 amLHR - PDX
2 stops18h 06mMultiple Airlines
Deal found 3/24$621
This Finnair deal was found by Cheapflights users on 3/24. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/77:25 pmPDX - LHR
Nonstop9h 35mFinnair
Tue 4/223:40 pmLHR - PDX
Nonstop9h 55mFinnair
Deal found 3/24$627
This Delta deal was found by Cheapflights users on 3/24. 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 4/72:00 pmPDX - LHR
1 stop13h 20mDelta
Tue 4/228:40 amLHR - PDX
1 stop34h 40mDelta
Deal found 3/24$629
This Cheapflightsfares deal was found by Cheapflights users on 3/24. 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.
Sun 9/287:25 pmPDX - LHR
Nonstop9h 35mBritish Airways
Tue 10/73:40 pmLHR - PDX
Nonstop9h 55mBritish Airways
Deal found 3/24$630
This United Airlines deal was found by Cheapflights users on 3/24. 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.
Sun 4/278:45 amPDX - LHR
1 stop19h 35mUnited Airlines
Tue 5/66:30 amLHR - PDX
2 stops20h 15mUnited Airlines
Deal found 3/24$632
This Booking.com deal was found by Cheapflights users on 3/24. 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.
Mon 4/710:10 amPDX - LHR
2 stops17h 40mLufthansa
Tue 4/222:10 pmLHR - PDX
1 stop12h 15mLufthansa
Deal found 3/24$638
This KLM deal was found by Cheapflights users on 3/25. 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.
Tue 4/159:55 amPDX - LHR
1 stop15h 55mKLM
Tue 4/2210:55 amLHR - PDX
1 stop15h 11mKLM
Deal found 3/25$653
This American Airlines deal was found by Cheapflights users on 3/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/153:15 pmPDX - LHR
1 stop13h 35mAmerican Airlines
Wed 10/83:40 pmLHR - PDX
Nonstop9h 55mAmerican Airlines
Deal found 3/24$669
This Air France deal was found by Cheapflights users on 3/25. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/101:52 pmPDX - LHR
1 stop15h 38mAir France
Fri 8/229:20 amLHR - PDX
1 stop17h 36mAir France
Deal found 3/25$703

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 March 25, 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

Tue 8/19

7:25 pm-1:00 pm

Nonstop9h 35m

London Heathrow

Thu 8/28

3:40 pm-5:35 pm

Nonstop9h 55m

$607

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 5/8

3:20 pm-11:55 am

1 stop12h 35m

London Heathrow

Thu 5/15

1:05 pm-5:55 pm

1 stop12h 50m

$608

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 4/7

3:25 pm-1:20 pm

1 stop13h 55m

London Heathrow

Tue 4/22

2:10 pm-9:35 am

1 stop27h 25m

$614

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 5/4

6:15 am-11:50 am

2 stops21h 35m

London Heathrow

Wed 5/21

6:00 am-6:45 pm

2 stops20h 45m

$621

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 4/7

7:25 pm-1:00 pm

Nonstop9h 35m

London Heathrow

Tue 4/22

3:40 pm-5:35 pm

Nonstop9h 55m

$627

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 9/21

11:53 am-10:30 am

1 stop14h 37m

London Heathrow

Tue 9/30

3:30 pm-10:58 pm

1 stop15h 28m

$628

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 4/7

2:00 pm-11:20 am

1 stop13h 20m

London Heathrow

Tue 4/22

8:40 am-11:20 am

1 stop34h 40m

$629

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 4/27

11:40 am-7:25 am

1 stop35h 45m

London Heathrow

Tue 5/6

2:10 pm-9:30 am

1 stop27h 20m

$632

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 4/7

10:10 am-11:50 am

2 stops17h 40m

London Heathrow

Tue 4/22

2:10 pm-6:25 pm

1 stop12h 15m

$638

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 4/7

5:31 am-6:20 am

2 stops16h 49m

London Heathrow

Tue 4/22

2:25 pm-11:02 pm

1 stop16h 37m

$642

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 28 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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
business-class.comPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

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

Expect security wait times up to 15 minutes off-peak, longer during rush hours. Use Express Lanes if eligible for faster processing.

Read more about PDXby Brandon Schultz
LHR

Take the Heathrow Express to Paddington for the fastest route into central London. It's quicker than taxis or rideshares.

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 March 21, 2025.

Booking 64 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 $1,115). 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 March 25, 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 21% 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 Thursday afternoons when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 March 25, 2025.
Read reviews from past customers who have flown Delta, KLM and Finnair from Portland to London. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

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.
8.0
Very good
8.0
Very good

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

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.
8.0
Very good

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

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.
8.0
Very good

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

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.
8.0
Very good

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

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.
8.0
Very good

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

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?

    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 12 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, Icelandair ($608), Iberia ($609), and Air Canada ($614) offers the cheapest pricing from Portland to London Heathrow Airport. Icelandair is priced at 30% 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 $390 on WestJet. Other airlines that offer cheap prices include Icelandair from $397 and Air Canada from $444 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 (74%), Alaska Airlines (74%), Aer Lingus (74%).

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

    On average you can expect to pay $2,128 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is $449 while the most popular route, (Portland - London Heathrow) is currently priced at $602.

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

  • 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 $45 per day to make their sightseeing more efficient.

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

  • 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 $1,115). 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 Portland?

Book flights to Portland if you plan to visit one of these locations
Hounslow
Hayes
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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 March 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$492Average$792FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$580Average$946FlexibilityNo cancel feeOn-time67%
IberiaCheapest$585Average$770FlexibilityNo cancel feeOn-time77%
DeltaCheapest$613Average$908FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$617Average$981FlexibilityNo cancel feeOn-time75%
British AirwaysCheapest$625Average$931FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$625Average$942FlexibilityNo cancel feeOn-time71%
FinnairCheapest$629Average$793FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$631Average$870FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$660Average$870FlexibilityNo cancel feeOn-time69%
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