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Heathrow

$345+ 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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 86 days in advance, depart on a Tuesday or Sunday 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 September 11, 2025.

Round-trip from

$545
(United Airlines)

One-way from

$345
(Ovago)

Popular in

June

Cheapest in

October

Average price

$759

Good round-trip deal

$662 or less

Good one-way deal

$470 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. 23% potential increase in price ($255 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($44 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/231:45 pmPDX - LHR
2 stops37h 50mUnited Airlines
Tue 10/142:10 pmLHR - PDX
1 stop32h 36mUnited Airlines
Deal found 9/11$545
This British Airways deal was found by Cheapflights users on 9/11. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/227:25 pmPDX - LHR
Nonstop9h 35mBritish Airways
Wed 11/51:45 pmLHR - PDX
Nonstop10h 10mBritish Airways
Deal found 9/11$546
This British Airways deal was found by Cheapflights users on 9/9. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/67:25 pmPDX - LHR
Nonstop9h 35mBritish Airways
Wed 10/223:40 pmLHR - PDX
Nonstop9h 55mBritish Airways
Deal found 9/9$547
This FlightHub deal was found by Cheapflights users on 9/9. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/151:16 pmPDX - LHR
1 stop13h 49mBritish Airways
Wed 10/223:40 pmLHR - PDX
Nonstop9h 55mBritish Airways
Deal found 9/9$548
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/237:10 pmPDX - LHR
2 stops16h 50mDelta
Fri 10/246:30 amLHR - PDX
1 stop12h 35mDelta
Deal found 9/10$549
This United Airlines deal was found by Cheapflights users on 9/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/225:30 amPDX - LHR
1 stop17h 55mUnited Airlines
Thu 10/92:10 pmLHR - PDX
1 stop16h 51mUnited Airlines
Deal found 9/9$550
This United Airlines deal was found by Cheapflights users on 9/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/111:05 amPDX - LHR
1 stop19h 05mUnited Airlines
Wed 10/82:10 pmLHR - PDX
1 stop16h 51mUnited Airlines
Deal found 9/11$551
This Air Canada deal was found by Cheapflights users on 9/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/16:15 amPDX - LHR
2 stops19h 20mAir Canada
Tue 10/286:00 pmLHR - PDX
2 stops27h 45mAir Canada
Deal found 9/9$552
This Delta deal was found by Cheapflights users on 9/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/227:15 amPDX - LHR
1 stop17h 35mDelta
Fri 10/311:30 amLHR - PDX
2 stops20h 22mDelta
Deal found 9/11$553
This FlightHub deal was found by Cheapflights users on 9/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/147:25 pmPDX - LHR
Nonstop9h 35mBritish Airways
Tue 11/410:05 amLHR - PDX
1 stop17h 09mBritish Airways
Deal found 9/10$554
This United Airlines deal was found by Cheapflights users on 9/8. 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 11/23:15 pmPDX - LHR
1 stop12h 35mUnited Airlines
Wed 11/121:25 pmLHR - PDX
3 stops29h 28mUnited Airlines
Deal found 9/8$555
This Finnair deal was found by Cheapflights users on 9/9. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/227:25 pmPDX - LHR
Nonstop9h 35mFinnair
Fri 10/3110:05 amLHR - PDX
1 stop16h 39mFinnair
Deal found 9/9$556

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 September 11, 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 10/19

7:25 pm-1:00 pm

Nonstop9h 35m

London Heathrow

Wed 11/5

1:45 pm-3:55 pm

Nonstop10h 10m

$546

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 9/24

7:15 am-10:00 am

1 stop18h 45m

London Heathrow

Wed 10/1

6:15 am-4:15 pm

2 stops18h 00m

$551

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 9/23

11:08 am-11:20 am

1 stop16h 12m

London Heathrow

Thu 10/23

6:30 am-7:19 pm

2 stops20h 49m

$554

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 10/29

6:00 am-6:25 am

1 stop17h 25m

London Heathrow

Tue 11/11

8:55 am-7:30 pm

1 stop18h 35m

$560

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 10/21

12:06 pm-1:10 pm

1 stop17h 04m

London Heathrow

Fri 11/7

11:05 am-5:27 pm

1 stop14h 22m

$561

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 10/14

1:40 pm-11:25 am

1 stop13h 45m

London Heathrow

Fri 10/31

10:10 am-9:04 pm

1 stop17h 54m

$561

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 10/18

12:40 am-1:10 pm

1 stop28h 30m

London Heathrow

Tue 10/28

11:05 am-8:26 pm

1 stop16h 21m

$566

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 10/15

5:30 am-2:10 pm

1 stop24h 40m

London Heathrow

Mon 11/3

2:30 pm-2:45 pm

1 stop32h 15m

$588

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 10/9

7:35 pm-2:10 pm

1 stop34h 35m

London Heathrow

Tue 10/28

2:30 pm-9:15 am

1 stop25h 45m

$589

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 10/8

7:12 am-9:15 am

1 stop18h 03m

London Heathrow

Mon 10/13

6:30 am-11:20 am

1 stop12h 50m

$594

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 22 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 August 29, 2025.

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

What is the cheapest month to book a flight from Portland to London Heathrow Airport?

Currently, 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 $1,098). 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 September 11, 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 14% 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.

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

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 September 11, 2025.
Peruse reviews from past customers who have flown with Delta, American Airlines, and Icelandair from Portland to London Heathrow Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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!
Icelandair
7.0
Good
546 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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!
Iberia
7.0
Good
2,929 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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!
British Airways
6.7
Okay
7,361 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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 6 outbound flights to London Heathrow per day from 12 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 Delta can get you from Portland to London Heathrow Airport in just under 9h 35m. Your travel time can differ by up to 9h 10m. 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 ($489), Delta ($554), and Virgin Atlantic ($567) offers the cheapest pricing from Portland to London Heathrow Airport. Icelandair is priced at 41% lower than the current average price of a flight leaving 3 months from now.

  • What are the most reliable airlines from Portland to London Heathrow Airport?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Portland to London Heathrow Airport on time: American Airlines (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 $1,160 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is $376 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 $67 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 $1,098). 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
Southend-on-Sea
Harrow
Canterbury
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Wembley
Folkestone

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from Portland to Heathrow

Discover the top 10 airlines that operate flights from Portland to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$489Average$682FlexibilityNo cancel feeOn-time76%
DeltaCheapest$554Average$875FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$567Average$777FlexibilityNo cancel feeOn-time72%
IberiaCheapest$578Average$778FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$597Average$847FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$623Average$876FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$627Average$886FlexibilityNo cancel feeOn-time71%
FinnairCheapest$645Average$818FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$709Average$965FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$713Average$966FlexibilityNo cancel feeOn-time67%

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