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$306+ 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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to London Heathrow are usually found in October or April, booked 55 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 junio 12, 2025.

Round-trip from

$711
(Icelandair)

One-way from

$306
(FlightHub)

Popular in

June

Cheapest in

October

Average price

$1,353

Good round-trip deal

$702 or less

Good one-way deal

$489 or less
From Portland to London Heathrow
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One-way flight from Portland to London Heathrow
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Highest demand for flights based on searches. 22% potential increase in price ($250 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($46 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Portland to London Heathrow.
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Price to beat on a one-way flight from Portland to London Heathrow.
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Find flight deals from Portland to Heathrow

Cheapest flights from Portland to Heathrow
Explore the most affordable flight options available from Portland to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 12, 2025.

This Scandinavian Airlines deal was found by Cheapflights users on 6/10. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/21:00 pmPDX - LHR
2 stops21h 30mScandinavian Airlines
lun. 10/66:40 amLHR - PDX
2 stops23h 40mScandinavian Airlines
Deal found 6/10$707
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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.
jue. 10/27:25 pmPDX - LHR
Nonstop9h 35mBritish Airways
mar. 10/143:40 pmLHR - PDX
Nonstop9h 55mBritish Airways
Deal found 6/10$709
This Air Canada deal was found by Cheapflights users on 6/11. 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.
lun. 8/1111:59 pmPDX - LHR
2 stops22h 31mAir Canada
lun. 8/253:50 pmLHR - PDX
2 stops31h 00mAir Canada
Deal found 6/11$713
This United Airlines deal was found by Cheapflights users on 6/10. 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.
sáb. 8/2310:50 pmPDX - LHR
2 stops23h 40mUnited Airlines
sáb. 9/63:50 pmLHR - PDX
2 stops27h 59mUnited Airlines
Deal found 6/10$714
This Lufthansa deal was found by Cheapflights users on 6/11. 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.
jue. 9/1110:00 amPDX - LHR
2 stops17h 50mLufthansa
vie. 9/192:10 pmLHR - PDX
1 stop12h 36mLufthansa
Deal found 6/11$716
This Iberia deal was found by Cheapflights users on 6/11. 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.
dom. 10/197:25 pmPDX - LHR
Nonstop9h 35mIberia
dom. 11/22:55 pmLHR - PDX
1 stop15h 57mIberia
Deal found 6/11$724
This Gotogate deal was found by Cheapflights users on 6/12. 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.
dom. 8/310:05 amPDX - LHR
2 stops17h 45mMultiple Airlines
vie. 8/156:00 amLHR - PDX
2 stops20h 46mMultiple Airlines
Deal found 6/12$726
This Delta deal was found by Cheapflights users on 6/12. 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.
lun. 8/115:45 pmPDX - LHR
1 stop12h 30mDelta
lun. 8/255:25 pmLHR - PDX
1 stop13h 33mDelta
Deal found 6/12$727
This Icelandair deal was found by Cheapflights users on 6/12. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/33:20 pmPDX - LHR
1 stop12h 35mIcelandair
lun. 8/119:25 pmLHR - PDX
1 stop28h 30mIcelandair
Deal found 6/12$739
This American Airlines deal was found by Cheapflights users on 6/9. 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.
vie. 9/267:25 pmPDX - LHR
Nonstop9h 35mAmerican Airlines
mar. 10/143:40 pmLHR - PDX
Nonstop9h 55mAmerican Airlines
Deal found 6/9$751
This KLM deal was found by Cheapflights users on 6/11. 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.
dom. 8/33:15 pmPDX - LHR
1 stop15h 00mKLM
jue. 8/1410:55 amLHR - PDX
1 stop13h 15mKLM
Deal found 6/11$758
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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.
dom. 8/1710:54 amPDX - LHR
2 stops21h 31mSWISS
lun. 9/16:00 amLHR - PDX
2 stops23h 01mSWISS
Deal found 6/11$790

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 junio 12, 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

jue. 10/2

1:00 pm-6:30 pm

2 stops21h 30m

London Heathrow

lun. 10/6

6:40 am-10:20 pm

2 stops23h 40m

$707

PortlandLondon

PDX - LHR

PDXLHR

Portland

jue. 10/2

7:25 pm-1:00 pm

Nonstop9h 35m

London Heathrow

mar. 10/14

3:40 pm-5:35 pm

Nonstop9h 55m

$709

PortlandLondon

PDX - LHR

PDXLHR

Portland

lun. 8/11

11:59 pm-6:30 am

2 stops22h 31m

London Heathrow

lun. 8/25

3:50 pm-2:50 pm

2 stops31h 00m

$713

PortlandLondon

PDX - LHR

PDXLHR

Portland

sáb. 8/23

10:50 pm-6:30 am

2 stops23h 40m

London Heathrow

sáb. 9/6

3:50 pm-11:49 am

2 stops27h 59m

$714

PortlandLondon

PDX - LHR

PDXLHR

Portland

jue. 9/11

10:00 am-11:50 am

2 stops17h 50m

London Heathrow

vie. 9/19

2:10 pm-6:46 pm

1 stop12h 36m

$716

PortlandLondon

PDX - LHR

PDXLHR

Portland

dom. 10/19

7:25 pm-1:00 pm

Nonstop9h 35m

London Heathrow

dom. 11/2

2:55 pm-10:52 pm

1 stop15h 57m

$724

PortlandLondon

PDX - LHR

PDXLHR

Portland

dom. 8/3

10:05 am-11:50 am

2 stops17h 45m

London Heathrow

vie. 8/15

6:00 am-6:46 pm

2 stops20h 46m

$726

PortlandLondon

PDX - LHR

PDXLHR

Portland

lun. 8/11

5:45 pm-2:15 pm

1 stop12h 30m

London Heathrow

lun. 8/25

5:25 pm-10:58 pm

1 stop13h 33m

$727

PortlandLondon

PDX - LHR

PDXLHR

Portland

dom. 8/3

3:20 pm-11:55 am

1 stop12h 35m

London Heathrow

lun. 8/11

9:25 pm-5:55 pm

1 stop28h 30m

$739

PortlandLondon

PDX - LHR

PDXLHR

Portland

vie. 9/26

7:25 pm-1:00 pm

Nonstop9h 35m

London Heathrow

mar. 10/14

3:40 pm-5:35 pm

Nonstop9h 55m

$751

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 26 results
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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 June 9, 2025.

Booking 55 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 $1,108). 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 junio 12, 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 18% 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 junio 12, 2025.

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

Rainfall in Heathrow by month

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

In terms of precipitation, rainfall in London Heathrow Airport ranges from 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 junio 12, 2025.
Read reviews from past customers who have flown Delta, Alaska Airlines and KLM from Portland to London. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

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
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

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!
Alaska Airlines
8.0
Very good
10,000 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

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!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

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
1,623 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

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
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

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 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 ($711), Air Canada ($713), and United Airlines ($714) offers the cheapest pricing from Portland to London Heathrow Airport. Icelandair is priced at 16% 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 $306 on Icelandair. Other airlines that offer cheap prices include Air Canada from $382 and Lufthansa from $396 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 (83%), Alaska Airlines (83%), Aer Lingus (83%).

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

    On average you can expect to pay $1,974 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is $408 while the most popular route, (Portland - London Heathrow) is currently priced at $531.

  • 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 $55 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 $1,108). 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
Hayes
Hounslow
Thornton Heath
Luton
Canterbury
Harrow
Dover
Stratford-upon-Avon
Gatwick
Orpington
Watford
Northampton
Croydon
Folkestone
Borehamwood
Broadway
Sutton
Aylesbury
Chelmsford
Brentwood

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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$491Average$731FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$580Average$803FlexibilityNo cancel feeOn-time67%
IberiaCheapest$586Average$778FlexibilityNo cancel feeOn-time77%
DeltaCheapest$602Average$867FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$613Average$875FlexibilityNo cancel feeOn-time70%
KLMCheapest$617Average$896FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$617Average$882FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$622Average$787FlexibilityNo cancel feeOn-time72%
FinnairCheapest$629Average$798FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$645Average$878FlexibilityNo cancel feeOn-time69%

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