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

Flights via Phoenix (PHX) offer the lowest average round-trip price of $538.

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

The number of flights available between Portland and London is 31 per week as of November 2025. The most frequent departure day is Fri, with 42% of weekly flights leaving on this day.

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

Phoenix (PHX) has the shortest average layover time for this route: 1h 43m.

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

Icelandair, Scandinavian Airlines, and Iberia are the most popular carriers operating from Portland to London

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

Flights connecting via Seattle (SEA) have the shortest average one-way travel time: 12h 34m.

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

As of November 2025, 4 flights take off from Portland and land in London each day. The most common flight departure time for this route is 5:00PM, with 79% of daily flights taking off in the afternoon.

What airlines fly to London?

British Airways, Iberia and American Airlines are the top three most popular airlines that fly to London from Portland according to our data. British Airways is the first choice among our users, with 61% of people opting to fly with this airline when traveling to London. Keep in mind that there are 13 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

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

Seattle (SEA) was the most common stop: 48% of momondo users choosing 1-stop flights on this route connected there.

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

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

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

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

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to London.

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

The required travel and health documents for your London trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$289 Cheap Flights from Portland to London in 2025/26

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6:00 am - 7:05 amPDX-LHR

17h 05m1 stop

11:05 am - 8:32 pmLHR-PDX

17h 27m1 stop

$566Virgin Atlantic

Find Deal

Mi, ian 14 - Jo, ian 29

6:00 am - 7:05 amPDX-LHR

17h 05m1 stop

11:05 am - 5:35 pmLHR-PDX

14h 30m1 stop

$567Virgin Atlantic

Find Deal

Mi, ian 14 - Jo, ian 29

6:00 am - 10:00 amPDX-LHR

20h 00m1 stop

6:45 pm - 11:45 amLHR-PDX

25h 00m2 stops

$576Iberia

Find Deal

Ma, ian 27 - Mi, feb 4

5:45 pm - 11:20 amPDX-LHR

9h 35mnonstop

1:45 pm - 3:55 pmLHR-PDX

10h 10mnonstop

$578Finnair

Find Deal

Lu, feb 9 - Mi, feb 18

1:45 pm - 10:00 amPDX-LHR

12h 15m1 stop

6:30 am - 11:25 amLHR-PDX

12h 55m1 stop

$580KLM

Find Deal

Mi, dec 3 - Mi, dec 10

5:45 pm - 11:20 amPDX-LHR

9h 35mnonstop

10:05 am - 7:10 pmLHR-PDX

17h 05m1 stop

$586British Airways

Find Deal

Mi, dec 3 - Ma, dec 9

2:45 pm - 10:55 amPDX-LGW

12h 10m1 stop

11:55 am - 5:00 pmLGW-PDX

13h 05m1 stop

$597Icelandair

Find Deal

Ma, dec 2 - Lu, dec 8

3:45 pm - 10:55 amPDX-LGW

12h 10m1 stop

3:40 pm - 6:00 pmLGW-PDX

34h 20m1 stop

$598Icelandair

Find Deal

Ma, mar 10 - Ma, mar 31

5:30 am - 4:35 pmPDX-LCY

27h 05m2 stops

8:40 am - 11:25 amLCY-PDX

34h 45m1 stop

$637Delta

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Ma, dec 2 - Ma, dec 9

7:59 pm - 4:35 pmPDX-LCY

36h 36m2 stops

8:40 am - 11:25 amLCY-PDX

34h 45m1 stop

$642Delta

Find Deal

Lu, dec 1 - Ma, dec 9

United Airlines flights from Portland to London

Our best United Airlines deals on Portland to London flight tickets

United Airlines

Nov 29

PDX7:00 pmPortland

32h 50m

1 stop

LHR11:50 amLondon Heathrow

Dec 11

LHR2:30 pmLondon Heathrow

26h 45m

1 stop

PDX9:15 amPortland

$582

Find similar

United Airlines

Nov 19

PDX7:00 amPortland

16h 55m

2 stops

LHR7:55 amLondon Heathrow

Dec 4

LHR6:35 amLondon Heathrow

35h 03m

2 stops

PDX9:38 amPortland

$622

Find similar

United Airlines

Jan 7

PDX10:47 amPortland

16h 28m

1 stop

LHR11:15 amLondon Heathrow

Jan 23

LHR1:25 pmLondon Heathrow

30h 35m

2 stops

PDX12:00 pmPortland

$631

Find similar

British Airways flights from Portland to London

Our best British Airways deals on Portland to London flight tickets

British Airways

Dec 3

PDX5:45 pmPortland

9h 35m

LHR11:20 amLondon Heathrow

Dec 9

LHR10:05 amLondon Heathrow

17h 05m

1 stop

PDX7:10 pmPortland

$586

Find similar

British Airways

Dec 3

PDX12:00 pmPortland

14h 00m

1 stop

LHR10:00 amLondon Heathrow

Dec 9

LHR10:15 amLondon Heathrow

16h 55m

1 stop

PDX7:10 pmPortland

$591

Find similar

British Airways

Feb 10

PDX7:38 amPortland

15h 12m

1 stop

LHR6:50 amLondon Heathrow

Feb 25

LHR1:45 pmLondon Heathrow

10h 10m

PDX3:55 pmPortland

$595

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mi 1/14

6:00 am-7:05 am

1 stop17h 05m

London Heathrow

Jo 1/29

11:05 am-8:32 pm

1 stop17h 27m

$566

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mi 1/14

6:00 am-7:05 am

1 stop17h 05m

London Heathrow

Jo 1/29

11:05 am-5:35 pm

1 stop14h 30m

$567

PortlandLondon

PDX - LHR

PDXLHR

Portland

Ma 1/27

6:00 am-10:00 am

1 stop20h 00m

London Heathrow

Mi 2/4

6:45 pm-11:45 am

2 stops25h 00m

$576

PortlandLondon

PDX - LHR

PDXLHR

Portland

Lu 2/9

5:45 pm-11:20 am

Nonstop9h 35m

London Heathrow

Mi 2/18

1:45 pm-3:55 pm

Nonstop10h 10m

$578

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mi 12/3

1:45 pm-10:00 am

1 stop12h 15m

London Heathrow

Mi 12/10

6:30 am-11:25 am

1 stop12h 55m

$580

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mi 12/3

5:45 pm-11:20 am

Nonstop9h 35m

London Heathrow

Ma 12/9

10:05 am-7:10 pm

1 stop17h 05m

$586

PortlandLondon

PDX - LGW

PDXLGW

Portland

Ma 12/2

2:45 pm-10:55 am

1 stop12h 10m

London Gatwick

Lu 12/8

11:55 am-5:00 pm

1 stop13h 05m

$597

PortlandLondon

PDX - LGW

PDXLGW

Portland

Ma 3/10

3:45 pm-10:55 am

1 stop12h 10m

London Gatwick

Ma 3/31

3:40 pm-6:00 pm

1 stop34h 20m

$598

PortlandLondon

PDX - LCY

PDXLCY

Portland

Ma 12/2

5:30 am-4:35 pm

2 stops27h 05m

London City

Ma 12/9

8:40 am-11:25 am

1 stop34h 45m

$637

PortlandLondon

PDX - LCY

PDXLCY

Portland

Lu 12/1

7:59 pm-4:35 pm

2 stops36h 36m

London City

Ma 12/9

8:40 am-11:25 am

1 stop34h 45m

$642

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How to get the cheapest flight ticket from Portland to London

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?

What is the cheapest month to fly to London?

The cheapest month to fly to London from Portland is in October. Flight prices, which tend to average around $645, are often lower during this time because this is during the off-season. The month of November is another great option to travel to London, with average flight prices from Portland averaging around $660.

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

The cheapest day to depart from Portland to London is on a Sunday. Travelers who choose to depart for London on a Sunday will often find tickets for as low as $858. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,038. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

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

Flying to London from Portland in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $807 when looking at flights departing in the afternoon. Flights to London are more costly in the evening, with an average ticket price of $937. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Portland to London flight route?

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

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

You are more likely to see cheaper flights to London from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $835 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Portland for as low as $765 on momondo.

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

There are 4 cabin classes available to choose from on Portland to London 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 flights?

You could potentially save up to 19% on your flight if you consider stops on a Portland to London flight.

How have Portland to London flight prices changed over time?

As of November 2025, prices for Portland to London flights are approximately 14% cheaper when compared to flights at the same time last year.

When to book flights from Portland to London

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

Estimated round-trip price

Cheap Portland to London (PDX to LON) flight deals and tips

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

Best Price Found	$501
Fastest flight time	9h 30m
Direct flights	Every day
Airports in London	1 airport

The best one-way flight to London from Portland in the past 72 hours is $501. The best round-trip flight deal from Portland to London found on momondo in the last 72 hours is $707.

The fastest flight from Portland to London takes 9h 30m

Direct flights go from Portland to London every day.

There is 1 airport near London: London Heathrow (LHR)

Search flight deals

How far is Portland to London by plane?
The distance between Portland and London is about 4909.8 mi. Typically, this will take 9h 35m by plane in normal conditions.
When did momondo last update prices for flights from Portland Airport to London?
Prices for flights from Portland Airport to London are refreshed on a daily basis.
How many operators does momondo search for flights from Portland Airport to London?
The number of operators available for flights from Portland Airport to London is 13 as of November 2025.
How old do you have to be to fly from Portland Airport to London?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to London.
What documentation or ID do you need to fly to London?
The required travel and health documents for your London trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Portland to London?
momondo data reveals that the most frequently booked plane model on the route from Portland to London is Boeing 787-8 Dreamliner, representing 59.20% of all bookings. The subsequent popular models are Boeing 787-10 Dreamliner at 23.24%, Boeing 787 Dreamliner at 6.94%, and Boeing 787-9 Dreamliner at 5.95%.
What is the most popular airline from Portland to London?
Based on momondo bookings for flights between Portland and London, the leading airline is British Airways, making up 41% of the total bookings. Other popular airlines include Iberia with 15%, Icelandair with 13%, and Delta with 8%.

Best airlines flying from Portland to London

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

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom $493	Free Cancellation	Rating 7.0 580 reviews	Search Icelandair flights
Delta	PriceFrom $554	Free Cancellation	Rating 7.9 8,007 reviews	Search Delta flights
KLM	PriceFrom $561	Free Cancellation	Rating 7.7 1,411 reviews	Search KLM flights
Virgin Atlantic	PriceFrom $567	Free Cancellation	Rating 7.5 673 reviews	Search Virgin Atlantic flights
Iberia	PriceFrom $577	Free Cancellation	Rating 7.0 3,020 reviews	Search Iberia flights
British Airways	PriceFrom $593	Free Cancellation	Rating 6.7 7,528 reviews	Search British Airways flights
Alaska Airlines	PriceFrom $600	Free Cancellation	Rating 8.0 11,314 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $619	Free Cancellation	Rating 7.4 9,015 reviews	Search United Airlines flights
American Airlines	PriceFrom $632	Free Cancellation	Rating 7.2 11,048 reviews	Search American Airlines flights
Finnair	PriceFrom $641	Free Cancellation	Rating 7.6 1,334 reviews	Search Finnair flights

Alaska Airlines Flights From Portland to London
The lowest priced Alaska Airlines flight from Portland to London from the last 72 hours was $600. Generally, Alaska Airlines has 5 flights on this route every week with an average price of $1,408. Alaska Airlines is rated 8.0/10 by our users.
Finnair Flights From Portland to London
Across 1,334 Finnair reviews on momondo, the average score is 7.6/10. Finnair flies from Portland to London about 4 times each week, with ticket deals ranging from $641 to $940. Price data is based on momondo searches in the last 72 hours.

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Dover

Luton

Slough

Guildford

Hayes

Dartford

Crawley

Brentwood

Chelmsford

Wembley

Folkestone

Romford

Ilford

Cobham

Stansted

Harrow

Watford

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Portland.

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

All flight searches from Portland to London on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Portland and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes. momondo can track prices for Portland to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Flights to Leedsfrom $481

Flights to Cardifffrom $653

Cheap flights from Portland to London from $289

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 12/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from Portland to London

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Our best British Airways deals on Portland to London flight tickets

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How to get the cheapest flight ticket from Portland to London

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?

What is the cheapest month to fly to London?

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

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

What is the cheapest Portland to London flight route?

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

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

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

There are 4 cabin classes available to choose from on Portland to London 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 flights?

You could potentially save up to 19% on your flight if you consider stops on a Portland to London flight.

How have Portland to London flight prices changed over time?

As of November 2025, prices for Portland to London flights are approximately 14% cheaper when compared to flights at the same time last year.

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

Icelandair, Scandinavian Airlines, and Iberia are the most popular carriers operating from Portland to London

What airlines fly to London?

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

Seattle (SEA) was the most common stop: 48% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Phoenix (PHX) offer the lowest average round-trip price of $538.

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

Flights connecting via Seattle (SEA) have the shortest average one-way travel time: 12h 34m.

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

Phoenix (PHX) has the shortest average layover time for this route: 1h 43m.

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

As of November 2025, 4 flights take off from Portland and land in London each day. The most common flight departure time for this route is 5:00PM, with 79% of daily flights taking off in the afternoon.

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

The number of flights available between Portland and London is 31 per week as of November 2025. The most frequent departure day is Fri, with 42% of weekly flights leaving on this day.

When to book flights from Portland to London

Cheap Portland to London (PDX to LON) flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in London

How far is Portland to London by plane?

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

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

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

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

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

What is the most popular airline from Portland to London?

Best airlines flying from Portland to London

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

Alaska Airlines Flights From Portland to London

Finnair Flights From Portland to London

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 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.