How long is the flight from Portland to London Heathrow Airport?

Scandinavian Airlines, Delta, and Virgin Atlantic can get you from Portland to London Heathrow Airport in just under 15h 41m. Your travel time can differ by up to 8h 25m. 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 ($494), Delta ($552), and Virgin Atlantic ($558) offers the cheapest pricing from Portland to London Heathrow Airport. Icelandair is priced at 40% 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 $206 on Icelandair. Other airlines that offer cheap prices include Virgin Atlantic from $378 and Iberia from $394 one-way.

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.

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).

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

On average you can expect to pay $1,275 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is $293 while the most popular route, (Portland - London Heathrow) is currently priced at $477.

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 (76%), Alaska Airlines (76%), Finnair (76%).

What are the most popular airlines that fly from Portland to London Heathrow Airport?

The most popular airlines flying from Portland to London Heathrow Airport are British Airways, Iberia and American Airlines. Something to consider prior to booking your flight.

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.

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.

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 $49 per day to make their sightseeing more efficient.

Most accurate provider : When it comes to deals on Portland-London Heathrow Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland-London Heathrow Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

What airport do you fly from for flights from Portland to London Heathrow?

Most people fly from Portland (PDX) if they book a flight from Portland to London Heathrow. On average, Portland has 3 outbound flights to London Heathrow per day from 13 airlines. Portland is conveniently located just 6.0 mi from Portland’s city center.

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.

$292+ Flights from Portland to London Heathrow Airport

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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

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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

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 December 10, 2025.

Tue 12/307:30 amPDX - LHR

1 stop15h 55mLufthansa

Sun 2/811:10 amLHR - PDX

2 stops21h 29mLufthansa

Deal found 12/9

$661

Tue 12/305:25 pmPDX - LHR

1 stop11h 25mDelta

Sun 2/86:30 amLHR - PDX

1 stop12h 55mDelta

Deal found 12/9

$690

Tue 12/307:00 pmPDX - LHR

2 stops31h 10mMultiple Airlines

Sun 2/86:00 amLHR - PDX

2 stops24h 32mMultiple Airlines

Deal found 12/9

$694

Mon 12/83:15 pmPDX - LHR

2 stops34h 55mAir Canada

Wed 12/243:00 pmLHR - PDX

2 stops31h 40mAir Canada

Deal found 12/8

$736

Tue 12/98:30 amPDX - LHR

2 stops23h 20mLufthansa

Tue 12/2310:05 amLHR - PDX

1 stop16h 43mLufthansa

Deal found 12/8

$750

Fri 12/129:50 amPDX - LHR

1 stop18h 00mLufthansa

Fri 1/306:30 amLHR - PDX

2 stops20h 00mLufthansa

Deal found 12/10

$759

Tue 12/306:15 amPDX - LHR

1 stop16h 50mKLM

Sun 2/86:30 amLHR - PDX

1 stop12h 55mKLM

Deal found 12/10

$760

Best flights from Portland to Heathrow
Discover carefully curated flight deals from Portland to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 10, 2025.

Mon 3/210:24 amPDX - LHR

2 stops24h 06mScandinavian Airlines

Sun 3/810:20 amLHR - PDX

2 stops19h 03mScandinavian Airlines

Deal found 12/8

$601

Wed 3/46:00 amPDX - LHR

1 stop17h 05mDelta

Wed 3/116:30 amLHR - PDX

1 stop12h 55mDelta

Deal found 12/7

$615

Tue 1/2711:59 amPDX - LHR

1 stop15h 41mVirgin Atlantic

Tue 2/105:50 pmLHR - PDX

1 stop25h 35mVirgin Atlantic

Deal found 12/9

$619

Mon 4/271:00 pmPDX - LHR

2 stops24h 40mScandinavian Airlines

Tue 5/57:05 amLHR - PDX

3 stops23h 17mScandinavian Airlines

Deal found 12/8

$621

Wed 1/145:30 amPDX - LHR

2 stops17h 20mDelta

Thu 1/2210:00 amLHR - PDX

1 stop33h 25mDelta

Deal found 12/9

$623

Tue 2/1011:10 amPDX - LHR

2 stops18h 35mDelta

Wed 2/256:30 amLHR - PDX

1 stop12h 55mDelta

Deal found 12/8

$623

Fri 1/237:00 amPDX - LHR

3 stops27h 30mScandinavian Airlines

Fri 1/3010:20 amLHR - PDX

2 stops20h 00mScandinavian Airlines

Deal found 12/9

$625

Sun 1/119:45 pmPDX - LHR

2 stops24h 35mDelta

Wed 2/46:30 amLHR - PDX

1 stop12h 55mDelta

Deal found 12/10

$623

Thu 3/51:02 pmPDX - LHR

2 stops24h 38mScandinavian Airlines

Thu 3/126:40 amLHR - PDX

2 stops22h 30mScandinavian Airlines

Deal found 12/9

$631

Last-minute flights from Portland to Heathrow
Discover last-minute flight deals from Portland to Heathrow. Data last updated December 10, 2025 and is based on user searches.

Tue 1/67:00 pmPDX - LHR

1 stop32h 50mMultiple Airlines

Fri 1/236:35 amLHR - PDX

2 stops19h 55mMultiple Airlines

Deal found 12/8

$598

Tue 1/67:45 amPDX - LHR

1 stop15h 40mLufthansa

Tue 1/1310:05 amLHR - PDX

1 stop16h 51mLufthansa

Deal found 12/8

$603

Wed 1/77:00 amPDX - LHR

1 stop16h 55mLufthansa

Thu 1/158:45 amLHR - PDX

2 stops23h 54mLufthansa

Deal found 12/9

$596

Wed 1/77:45 amPDX - LHR

1 stop20h 15mLufthansa

Wed 1/148:15 pmLHR - PDX

2 stops29h 55mLufthansa

Deal found 12/10

$606

Sat 1/107:00 pmPDX - LHR

1 stop32h 50mMultiple Airlines

Fri 2/67:40 amLHR - PDX

2 stops18h 50mMultiple Airlines

Deal found 12/10

$613

Mon 1/129:50 amPDX - LHR

1 stop18h 00mLufthansa

Wed 1/286:35 amLHR - PDX

2 stops19h 35mLufthansa

Deal found 12/8

$592

Tue 1/139:50 amPDX - LHR

2 stops16h 20mLufthansa

Tue 1/209:30 amLHR - PDX

2 stops23h 09mLufthansa

Deal found 12/9

$602

Wed 1/147:00 amPDX - LHR

1 stop14h 55mBrussels Airlines

Fri 1/2310:25 amLHR - PDX

1 stop16h 31mBrussels Airlines

Deal found 12/9

$609

Wed 1/288:30 amPDX - LHR

1 stop17h 10mLufthansa

Wed 2/1111:35 amLHR - PDX

1 stop14h 35mLufthansa

Deal found 12/8

$604

One-way flights from Portland to Heathrow
Search for one-way flight options from Portland to Heathrow. Find affordable one-way fares based on user searches. Data last updated December 10, 2025.

Sat 1/317:38 pmPDX - LHR

3 stops33h 12mMultiple Airlines

Deal found 12/10

$292

Mon 1/195:35 pmPDX - LHR

3 stops35h 15mMultiple Airlines

Deal found 12/8

$293

Fri 1/231:38 pmPDX - LHR

3 stops39h 12mMultiple Airlines

Deal found 12/10

$295

Mon 3/163:45 pmPDX - LHR

1 stop12h 05mIcelandair

Deal found 12/10

$330

Tue 1/1310:24 amPDX - LHR

2 stops24h 06mScandinavian Airlines

Deal found 12/9

$343

Thu 5/711:40 pmPDX - LHR

1 stop22h 50mJetBlue

Deal found 12/9

$349

Tue 1/67:45 amPDX - LHR

1 stop20h 15mLufthansa

Deal found 12/8

$363

Find flight deals from Portland to Heathrow

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$592 (Cheapflightsfares)
One-way from	$292 (Kiwi.com)
Popular in	June
Cheapest in	October
Average price	$905
Good round-trip deal	$669 or less
Good one-way deal	$414 or less

Provider with most accurate pricing for Portland-London Heathrow flight deals.

Search Deals

Provider most trusted by Cheapflights users for Portland-London Heathrow flights.

Search Deals

From Portland to London Heathrow

Search Deals

One-way flight from Portland to London Heathrow

Search Deals

Highest demand for flights based on searches. 23% potential increase in price ($263 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($45 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 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

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 3/2

10:24 am-6:30 pm

2 stops24h 06m

London Heathrow

Sun 3/8

10:20 am-10:23 pm

2 stops19h 03m

$601

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 3/4

6:00 am-7:05 am

1 stop17h 05m

London Heathrow

Wed 3/11

6:30 am-12:25 pm

1 stop12h 55m

$615

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 1/27

11:59 am-11:40 am

1 stop15h 41m

London Heathrow

Tue 2/10

5:50 pm-11:25 am

1 stop25h 35m

$619

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 4/27

1:00 pm-9:40 pm

2 stops24h 40m

London Heathrow

Tue 5/5

7:05 am-10:22 pm

3 stops23h 17m

$621

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 1/14

5:30 am-6:50 am

2 stops17h 20m

London Heathrow

Thu 1/22

10:00 am-11:25 am

1 stop33h 25m

$623

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 2/10

11:10 am-1:45 pm

2 stops18h 35m

London Heathrow

Wed 2/25

6:30 am-11:25 am

1 stop12h 55m

$623

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 1/11

9:45 pm-6:20 am

2 stops24h 35m

London Heathrow

Wed 2/4

6:30 am-11:25 am

1 stop12h 55m

$623

PortlandLondon

PDX - LHR

PDXLHR

Portland

Fri 1/23

7:00 am-6:30 pm

3 stops27h 30m

London Heathrow

Fri 1/30

10:20 am-10:20 pm

2 stops20h 00m

$625

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 3/5

1:02 pm-9:40 pm

2 stops24h 38m

London Heathrow

Thu 3/12

6:40 am-10:10 pm

2 stops22h 30m

$631

PortlandLondon

PDX - LHR

PDXLHR

Portland

Fri 1/23

1:38 pm-12:50 pm

3 stops39h 12m

$295

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 16 results

Compare providers for flights from Portland to Heathrow

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Heathrow in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
AranGrant	Price Accuracy2 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Ovago	Price Accuracy2 stars	Trust Score*2 stars
oojo	Price Accuracy3 stars	Trust Score*3 stars
Cheapfaremart	Price Accuracy-	Trust Score*1 star

*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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland-London Heathrow Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Portland with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to London Heathrow Airport

How far ahead should I book a flight from Portland to London Heathrow Airport?

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

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

Currently, December is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of $522). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of $832). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PDX to LHR?

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 morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 36% on airfare.

What is the cheapest day to fly from Portland to London Heathrow Airport?

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. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

The best insider tips for Portland to London Heathrow Airport flights

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.

LHR

Take the Heathrow Express for the fastest route into central London, arriving at Paddington Station with easy access to the tube.

Our travel experts

Brandon Schultz

Expert on PDX

Ramsey Qubein

Expert on LHR

Reviews of airlines servicing Heathrow

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

Delta

7.9

Good

8,009 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

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

Delta

7.9

Good

8,009 reviews

Delta

7.9

Good

8,009 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

American Airlines

7.2

Good

11,048 reviews

Delta

7.9

Good

8,009 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

Icelandair

7.0

Good

589 reviews

Delta

7.9

Good

8,009 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

Iberia

7.0

Good

3,045 reviews

Delta

7.9

Good

8,009 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

British Airways

6.7

Okay

7,573 reviews

Delta

7.9

Good

8,009 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

Related info for your journey

What airport do you fly from for flights from Portland to London Heathrow?
Most people fly from Portland (PDX) if they book a flight from Portland to London Heathrow. On average, Portland has 3 outbound flights to London Heathrow per day from 13 airlines. Portland is conveniently located just 6.0 mi from Portland’s city center.
How long is the flight from Portland to London Heathrow Airport?
Scandinavian Airlines, Delta, and Virgin Atlantic can get you from Portland to London Heathrow Airport in just under 15h 41m. Your travel time can differ by up to 8h 25m. 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 ($494), Delta ($552), and Virgin Atlantic ($558) offers the cheapest pricing from Portland to London Heathrow Airport. Icelandair is priced at 40% 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 $206 on Icelandair. Other airlines that offer cheap prices include Virgin Atlantic from $378 and Iberia from $394 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 (76%), Alaska Airlines (76%), Finnair (76%).
What are the cheapest flights from Portland to London Heathrow Airport?
On average you can expect to pay $1,275 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is $293 while the most popular route, (Portland - London Heathrow) is currently priced at $477.
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 $49 per day to make their sightseeing more efficient.
Where are the least popular layover locations for Portland to London Heathrow Airport flights?
Portland to London Heathrow Airport flights that have layovers will least frequently stop in Reykjavik.
Can I find deals for flights from Portland to Heathrow that include hotel bookings?
Yes. In addition to deals on Portland to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Portland to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Heathrow.
Can I find deals for business class flights from Portland to Heathrow?
Yes. Cheapflights offers flight deals from Portland to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Portland to London Heathrow Airport?
Currently, December is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of $522). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of $832). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 10 airlines flying from Portland to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest$496	Average$682	FlexibilityNo cancel fee	On-time76%
Delta	Cheapest$552	Average$865	FlexibilityNo cancel fee	On-timeN/A
Virgin Atlantic	Cheapest$558	Average$754	FlexibilityNo cancel fee	On-time72%
KLM	Cheapest$561	Average$669	FlexibilityNo cancel fee	On-time75%
Iberia	Cheapest$577	Average$795	FlexibilityNo cancel fee	On-time77%
British Airways	Cheapest$593	Average$846	FlexibilityNo cancel fee	On-time70%
Alaska Airlines	Cheapest$600	Average$1,442	FlexibilityNo cancel fee	On-time75%
United Airlines	Cheapest$619	Average$936	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$632	Average$889	FlexibilityNo cancel fee	On-time71%
Finnair	Cheapest$641	Average$942	FlexibilityNo cancel fee	On-time76%

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$292+ 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 1/31. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Portland to Heathrow with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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

Cheapest flights from Portland to HeathrowExplore 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 December 10, 2025.

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 December 10, 2025.

Find flight deals from Portland to Heathrow

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

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Reviews of airlines servicing Heathrow

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.

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.

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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?

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?

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Alternative routes for Portland to Heathrow

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Top 10 airlines flying from Portland to Heathrow

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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 December 10, 2025.