Which airport is the most popular layover for flights between Portland and London Heathrow Airport?

Seattle (SEA) was the most common stop: 44% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest connection time from Portland to London Heathrow Airport?

Denver (DEN) has the shortest average layover time for this route: 1h 10m.

What airlines fly to London Heathrow Airport?

British Airways, Iberia and American Airlines are the top three most popular airlines that fly to London Heathrow Airport from Portland according to our data. British Airways is the first choice among our users, with 60% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 13 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Portland to London Heathrow?

Scandinavian Airlines, Air Canada, and United Airlines are the most popular carriers operating from Portland to London Heathrow

How many flights depart from Portland to London Heathrow Airport on average per day?

As of September 2025, 7 flights take off from Portland and land in London Heathrow Airport each day. The most common flight departure time for this route is 7:00PM, with 100% of daily flights taking off in the evening.

Which layover airport offers the lowest fares from Portland to London Heathrow Airport?

Flights via Vancouver (YVR) offer the lowest average round-trip price of $1,184.

Which layover airport has the shortest travel time from Portland to London Heathrow Airport?

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 12h 14m.

How many flights depart from Portland to London Heathrow Airport on average per week?

The number of flights available between Portland and London Heathrow Airport is 49 per week as of September 2025. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.

When did momondo last update prices for flights from Portland Airport to London Heathrow Airport?

Prices for flights from Portland Airport to London Heathrow Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Portland Airport to London Heathrow Airport?

The number of operators available for flights from Portland Airport to London Heathrow Airport is 13 as of September 2025.

How old do you have to be to fly from Portland Airport to London Heathrow Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to London Heathrow Airport.

What documentation or ID do you need to fly to London Heathrow Airport?

The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$359 Cheap Flights from Portland to London Heathrow Airport in 2025/26

Q: What is the typical price of a round-trip flight between Portland and London Heathrow Airport?

Prices are currently low for flights on this route. Typical prices usually range from $668 to $891. The lowest price recently found on this route was $545.

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Find the cheapest flights from Portland to London

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

5:00 am - 12:20 pmPDX-LHR

23h 20m1 stop

6:00 pm - 10:10 pmLHR-PDX

35h 10m2 stops

$545United Airlines

Find Deal

Wed, Oct 22 - Wed, Oct 29

7:00 pm - 11:50 amPDX-LHR

33h 50m1 stop

2:30 pm - 2:45 pmLHR-PDX

32h 15m1 stop

$546Air Canada

Find Deal

Sat, Nov 1 - Wed, Nov 19

7:25 pm - 1:00 pmPDX-LHR

9h 35mnonstop

3:40 pm - 5:35 pmLHR-PDX

9h 55mnonstop

$547British Airways

Find Deal

Wed, Oct 15 - Thu, Oct 23

7:25 pm - 1:00 pmPDX-LHR

9h 35mnonstop

3:40 pm - 5:35 pmLHR-PDX

9h 55mnonstop

$548American Airlines

Find Deal

Mon, Oct 6 - Wed, Oct 22

3:25 pm - 1:20 pmPDX-LHR

13h 55m1 stop

6:30 am - 6:46 pmLHR-PDX

20h 16m2 stops

$549Lufthansa

Find Deal

Fri, Oct 17 - Sun, Oct 19

10:50 am - 9:40 amPDX-LHR

14h 50m1 stop

7:45 am - 8:20 pmLHR-PDX

20h 35m2 stops

$550United Airlines

Find Deal

Wed, Oct 8 - Tue, Oct 14

2:45 pm - 7:30 pmPDX-LHR

20h 45m1 stop

8:35 pm - 5:00 pmLHR-PDX

28h 25m1 stop

$553Icelandair

Find Deal

Thu, Nov 20 - Sat, Dec 6

3:19 pm - 11:20 amPDX-LHR

12h 01m1 stop

6:15 am - 4:45 pmLHR-PDX

18h 30m2 stops

$554Delta

Find Deal

Mon, Oct 6 - Wed, Oct 22

7:25 pm - 1:00 pmPDX-LHR

9h 35mnonstop

8:20 am - 5:04 pmLHR-PDX

16h 44m1 stop

$556British Airways

Find Deal

Tue, Oct 14 - Tue, Oct 21

5:50 pm - 2:15 pmPDX-LHR

12h 25m1 stop

1:25 pm - 10:40 pmLHR-PDX

17h 15m1 stop

$561Delta

Find Deal

Sun, Oct 12 - Wed, Oct 22

Delta flights from Portland to London Heathrow Airport

Our best Delta deals on Portland to London Heathrow Airport flight tickets

Delta

Sep 22

PDX7:15 amPortland

15h 10m

1 stop

LHR6:25 amLondon Heathrow

Oct 3

LHR6:15 amLondon Heathrow

18h 55m

2 stops

PDX5:10 pmPortland

$553

Find similar

Delta

Oct 6

PDX3:19 pmPortland

12h 01m

1 stop

LHR11:20 amLondon Heathrow

Oct 22

LHR6:15 amLondon Heathrow

18h 30m

2 stops

PDX4:45 pmPortland

$554

Find similar

Delta

Oct 12

PDX5:50 pmPortland

12h 25m

1 stop

LHR2:15 pmLondon Heathrow

Oct 22

LHR1:25 pmLondon Heathrow

17h 15m

1 stop

PDX10:40 pmPortland

$561

Find similar

Air Canada flights from Portland to London Heathrow Airport

Our best Air Canada deals on Portland to London Heathrow Airport flight tickets

Air Canada

Nov 1

PDX7:00 pmPortland

33h 50m

1 stop

LHR11:50 amLondon Heathrow

Nov 19

LHR2:30 pmLondon Heathrow

32h 15m

1 stop

PDX2:45 pmPortland

$546

Find similar

Air Canada

Sep 23

PDX7:35 pmPortland

26h 55m

2 stops

LHR6:30 amLondon Heathrow

Oct 2

LHR2:05 pmLondon Heathrow

16h 56m

2 stops

PDX11:01 pmPortland

$547

Find similar

Air Canada

Sep 23

PDX2:15 pmPortland

32h 15m

2 stops

LHR6:30 amLondon Heathrow

Sep 30

LHR10:15 amLondon Heathrow

20h 46m

2 stops

PDX11:01 pmPortland

$563

Find similar

momondo 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

Wed 10/22

5:00 am-12:20 pm

1 stop23h 20m

London Heathrow

Wed 10/29

6:00 pm-10:10 pm

2 stops35h 10m

$545

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 11/1

7:00 pm-11:50 am

1 stop33h 50m

London Heathrow

Wed 11/19

2:30 pm-2:45 pm

1 stop32h 15m

$546

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 10/15

7:25 pm-1:00 pm

Nonstop9h 35m

London Heathrow

Thu 10/23

3:40 pm-5:35 pm

Nonstop9h 55m

$547

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 10/6

7:25 pm-1:00 pm

Nonstop9h 35m

London Heathrow

Wed 10/22

3:40 pm-5:35 pm

Nonstop9h 55m

$548

PortlandLondon

PDX - LHR

PDXLHR

Portland

Fri 10/17

3:25 pm-1:20 pm

1 stop13h 55m

London Heathrow

Sun 10/19

6:30 am-6:46 pm

2 stops20h 16m

$549

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 10/8

10:50 am-9:40 am

1 stop14h 50m

London Heathrow

Tue 10/14

7:45 am-8:20 pm

2 stops20h 35m

$550

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 11/20

2:45 pm-7:30 pm

1 stop20h 45m

London Heathrow

Sat 12/6

8:35 pm-5:00 pm

1 stop28h 25m

$553

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 10/6

3:19 pm-11:20 am

1 stop12h 01m

London Heathrow

Wed 10/22

6:15 am-4:45 pm

2 stops18h 30m

$554

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 10/14

7:25 pm-1:00 pm

Nonstop9h 35m

London Heathrow

Tue 10/21

8:20 am-5:04 pm

1 stop16h 44m

$556

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 10/12

5:50 pm-2:15 pm

1 stop12h 25m

London Heathrow

Wed 10/22

1:25 pm-10:40 pm

1 stop17h 15m

$561

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Portland to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

Other information

What is the typical price of a round-trip flight between Portland and London Heathrow Airport?

What is the cheapest month to fly to London Heathrow Airport?

The month of October is, on average, the cheapest month to fly to London Heathrow Airport from Portland, with most prices found around $678. If you’re not able to fly to London Heathrow Airport in October, then April is your next best option. Flight prices from Portland to London Heathrow Airport during April average around $690.

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Tuesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $854. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $1,067.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Portland to London Heathrow Airport in the afternoon for as low as $813. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of $937.

What is the cheapest Portland to London Heathrow flight route?

Fly from Portland to London Heathrow for the best Portland - London Heathrow flight prices

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $838 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Portland for as low as $742 on momondo.

What cabin class options are available on Portland to London Heathrow flights?

There are 4 cabin classes available to choose from on Portland to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Portland to London Heathrow Airport flights?

You could potentially save up to 12% on your flight if you consider stops on a Portland to London Heathrow Airport flight.

How have Portland to London Heathrow Airport flight prices changed over time?

As of September 2025, prices for Portland to London Heathrow Airport flights are approximately 12% cheaper when compared to flights at the same time last year.

When to book flights from Portland to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Portland to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Portland to London Heathrow Airport (PDX to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to London Heathrow Airport

Best Price Found	$490
Fastest flight time	9h 35m
Direct flights	Every day

The best one-way flight to London Heathrow Airport from Portland in the past 72 hours is $490. The best round-trip flight deal from Portland to London Heathrow Airport found on momondo in the last 72 hours is $673.

The fastest flight from Portland to London Heathrow Airport takes 9h 35m

Direct flights go from Portland to London Heathrow Airport every day.

Search flight deals

How far is Portland to London Heathrow by plane?
Portland and London Heathrow are 4902.4 mi apart from one another. Typically, this will take 9h 35m by plane in normal conditions.
When did momondo last update prices for flights from Portland Airport to London Heathrow Airport?
Prices for flights from Portland Airport to London Heathrow Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Portland Airport to London Heathrow Airport?
The number of operators available for flights from Portland Airport to London Heathrow Airport is 13 as of September 2025.
How old do you have to be to fly from Portland Airport to London Heathrow Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Portland to London Heathrow Airport?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Portland to London Heathrow Airport is Boeing 787-8 Dreamliner (45.05% of total bookings). The next most popular plane models are Boeing 787-10 Dreamliner (40.77%), Boeing 787-9 Dreamliner (4.47%), and Boeing 787 Dreamliner (3.90%).
What is the most popular airline from Portland to London Heathrow Airport?
momondo data reveals that the most frequently booked airline on the route from Portland to London Heathrow Airport is British Airways, representing 49% of all bookings. The subsequent popular airlines are Iberia at 15%, American Airlines at 9%, and Icelandair at 7%.

Best airlines flying from Portland to London Heathrow Airport

Compare and see reviews for airlines that fly from Portland to London Heathrow Airport with momondo

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom $490	Free Cancellation	Rating 7.0 545 reviews	Search Icelandair flights
Delta	PriceFrom $554	Free Cancellation	Rating 7.9 7,961 reviews	Search Delta flights
KLM	PriceFrom $561	Free Cancellation	Rating 7.8 1,386 reviews	Search KLM flights
Virgin Atlantic	PriceFrom $567	Free Cancellation	Rating 7.4 664 reviews	Search Virgin Atlantic flights
Iberia	PriceFrom $578	Free Cancellation	Rating 7.0 2,925 reviews	Search Iberia flights
British Airways	PriceFrom $595	Free Cancellation	Rating 6.7 7,367 reviews	Search British Airways flights
United Airlines	PriceFrom $623	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
American Airlines	PriceFrom $628	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Finnair	PriceFrom $641	Free Cancellation	Rating 7.6 1,324 reviews	Search Finnair flights
Air Canada	PriceFrom $704	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights

Alaska Airlines Flights From Portland to London Heathrow Airport
Across 7 Alaska Airlines flights from Portland to London Heathrow Airport this week, the average price was $1,433, with the best Alaska Airlines deals starting from $914 round-trip. 10,000 users have rated Alaska Airlines on momondo, with an average score of 8.0/10.
Finnair Flights From Portland to London Heathrow Airport
Across 1,324 Finnair reviews on momondo, the average score is 7.6/10. Finnair flies from Portland to London Heathrow Airport about 7 times each week, with ticket deals ranging from $641 to $818. Price data is based on momondo searches in the last 72 hours.

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Folkestone

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Watford

Why use momondo?

Why should I use momondo to find a flight deal from Portland to London?

Finding the right flight to London from Portland is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

Can I find flights from Portland to London with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to London from Portland with this policy.

How can momondo help me find flights from Portland to London?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Portland.

I’m not ready to book a flight from Portland to London right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Portland to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your London Heathrow Airport trip

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Cheap flights from Portland to London from $359

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to London departing on 10/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

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Filter for what you want

Filter for what you want

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Find the cheapest flights from Portland to London

Cheap round-trip flights

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Cheap last minute flights

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Delta flights from Portland to London Heathrow Airport

Our best Delta deals on Portland to London Heathrow Airport flight tickets

Air Canada flights from Portland to London Heathrow Airport

Our best Air Canada deals on Portland to London Heathrow Airport flight tickets

momondo Fare Finder

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

See travel insights to London from

How to get the cheapest flight ticket from Portland to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Portland and London Heathrow Airport?

What is the cheapest month to fly to London Heathrow Airport?

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Tuesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $854. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $1,067.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

What is the cheapest Portland to London Heathrow flight route?

Fly from Portland to London Heathrow for the best Portland - London Heathrow flight prices

How far in advance should I book a flight to London Heathrow Airport?

What cabin class options are available on Portland to London Heathrow flights?

There are 4 cabin classes available to choose from on Portland to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Portland to London Heathrow Airport flights?

You could potentially save up to 12% on your flight if you consider stops on a Portland to London Heathrow Airport flight.

How have Portland to London Heathrow Airport flight prices changed over time?

As of September 2025, prices for Portland to London Heathrow Airport flights are approximately 12% cheaper when compared to flights at the same time last year.

What is the cheapest airline that flies from Portland to London Heathrow?

Scandinavian Airlines, Air Canada, and United Airlines are the most popular carriers operating from Portland to London Heathrow

What airlines fly to London Heathrow Airport?

Which airport is the most popular layover for flights between Portland and London Heathrow Airport?

Seattle (SEA) was the most common stop: 44% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Portland to London Heathrow Airport?

Flights via Vancouver (YVR) offer the lowest average round-trip price of $1,184.

Which layover airport has the shortest travel time from Portland to London Heathrow Airport?

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 12h 14m.

Which layover airport has the shortest connection time from Portland to London Heathrow Airport?

Denver (DEN) has the shortest average layover time for this route: 1h 10m.

How many flights depart from Portland to London Heathrow Airport on average per day?

As of September 2025, 7 flights take off from Portland and land in London Heathrow Airport each day. The most common flight departure time for this route is 7:00PM, with 100% of daily flights taking off in the evening.

How many flights depart from Portland to London Heathrow Airport on average per week?

The number of flights available between Portland and London Heathrow Airport is 49 per week as of September 2025. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.

When to book flights from Portland to London Heathrow Airport

Cheap Portland to London Heathrow Airport (PDX to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to London Heathrow Airport

Best Price Found

Fastest flight time

Direct flights

How far is Portland to London Heathrow by plane?

When did momondo last update prices for flights from Portland Airport to London Heathrow Airport?

How many operators does momondo search for flights from Portland Airport to London Heathrow Airport?

How old do you have to be to fly from Portland Airport to London Heathrow Airport?

What documentation or ID do you need to fly to London Heathrow Airport?

What is the most popular plane model from Portland to London Heathrow Airport?

What is the most popular airline from Portland to London Heathrow Airport?

Best airlines flying from Portland to London Heathrow Airport

Compare and see reviews for airlines that fly from Portland to London Heathrow Airport with momondo

Alaska Airlines Flights From Portland to London Heathrow Airport

Finnair Flights From Portland to London Heathrow Airport

Traveling to a place near London?

Why use momondo?

Why should I use momondo to find a flight deal from Portland to London?

Can I find flights from Portland to London with flexible booking policies on momondo?

How can momondo help me find flights from Portland to London?

I’m not ready to book a flight from Portland to London right now. Can momondo alert me if prices change?

An easier way to manage your London Heathrow Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.