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Cheap flights from London to Portland from $381

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Portland departing on 10/2. 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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0 bags

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Find the cheapest flights from London to Portland

Cheap round-trip flights

Logo
10:55 am - 9:26 amLGW-PDX
30h 31m1 stop
Logo
5:35 pm - 10:55 amPDX-LGW
33h 20m1 stop
$613
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Fri, Sep 26 - Tue, Sep 30
Logo
9:50 am - 10:47 pmLGW-PDX
20h 57m2 stops
Logo
7:00 am - 10:55 amPDX-LGW
19h 55m1 stop
$625
Find Deal
Mon, Sep 29 - Sun, Oct 5
Icelandair Logo
1:00 pm - 5:55 pmLGW-PDX
12h 55m1 stop
Icelandair Logo
3:20 pm - 2:35 pmPDX-LGW
15h 15m1 stop
$640Icelandair
Find Deal
Tue, Sep 9 - Mon, Sep 15
Icelandair Logo
9:25 pm - 5:55 pmLHR-PDX
28h 30m1 stop
Icelandair Logo
3:20 pm - 8:20 pmPDX-LHR
21h 00m1 stop
$641Icelandair
Find Deal
Mon, Sep 1 - Mon, Sep 15
British Airways Logo
3:40 pm - 5:35 pmLHR-PDX
9h 55mnonstop
British Airways Logo
10:28 am - 7:20 amPDX-LHR
12h 52m1 stop
$709British Airways
Find Deal
Tue, Sep 9 - Mon, Sep 15
SWISS Logo
6:35 pm - 6:46 pmLGW-PDX
32h 11m2 stops
SWISS Logo
10:51 am - 5:50 pmPDX-LGW
22h 59m2 stops
$711SWISS
Find Deal
Wed, Sep 17 - Sun, Sep 21
SWISS Logo
6:00 am - 6:46 pmLHR-PDX
20h 46m2 stops
SWISS Logo
8:30 am - 7:55 amPDX-LHR
39h 25m2 stops
$715SWISS
Find Deal
Fri, Sep 19 - Tue, Sep 23
British Airways Logo
3:40 pm - 5:35 pmLHR-PDX
9h 55mnonstop
British Airways Logo
11:18 am - 9:05 amPDX-LHR
13h 47m1 stop
$730British Airways
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Tue, Sep 2 - Tue, Sep 16
American Airlines Logo
3:40 pm - 5:35 pmLHR-PDX
9h 55mnonstop
American Airlines Logo
7:25 pm - 1:00 pmPDX-LHR
9h 35mnonstop
$741American Airlines
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Mon, Aug 25 - Tue, Sep 9
American Airlines Logo
3:40 pm - 5:35 pmLHR-PDX
9h 55mnonstop
American Airlines Logo
10:28 am - 10:30 amPDX-LHR
16h 02m1 stop
$747American Airlines
Find Deal
Tue, Sep 9 - Mon, Sep 15

Air Canada flights from London to Portland

Our best Air Canada deals on London to Portland flight tickets
Air Canada
Sep 17
LHR8:40 amLondon Heathrow
18h 06m
2 stops
PDX6:46 pmPortland
Sep 21
PDX6:15 amPortland
19h 20m
2 stops
LHR9:35 amLondon Heathrow
$712
Find similar
Air Canada
Sep 25
LHR8:40 amLondon Heathrow
18h 06m
2 stops
PDX6:46 pmPortland
Oct 2
PDX3:25 pmPortland
13h 55m
1 stop
LHR1:20 pmLondon Heathrow
$717
Find similar
Air Canada
Sep 21
LHR2:10 pmLondon Heathrow
12h 36m
1 stop
PDX6:46 pmPortland
Oct 11
PDX6:15 amPortland
23h 05m
1 stop
LHR1:20 pmLondon Heathrow
$742
Find similar

American Airlines flights from London to Portland

Our best American Airlines deals on London to Portland flight tickets
American Airlines
Aug 25
LHR3:40 pmLondon Heathrow
9h 55m
PDX5:35 pmPortland
Sep 9
PDX7:25 pmPortland
9h 35m
LHR1:00 pmLondon Heathrow
$741
Find similar
American Airlines
Sep 9
LHR3:40 pmLondon Heathrow
9h 55m
PDX5:35 pmPortland
Sep 15
PDX10:28 amPortland
16h 02m
1 stop
LHR10:30 amLondon Heathrow
$747
Find similar
American Airlines
Aug 25
LHR3:40 pmLondon Heathrow
9h 55m
PDX5:35 pmPortland
Sep 9
PDX7:25 pmPortland
9h 35m
LHR1:00 pmLondon Heathrow
$749
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from London to Portland 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, momondo users made 832,500 searches. Data last updated July 31, 2025.
Use the filters below to find and compare flights from London to Portland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonPortland

LGW - PDX

LGWPDX

London Gatwick

Fri 9/26

10:55 am-9:26 am

1 stop30h 31m

Portland

Tue 9/30

5:35 pm-10:55 am

1 stop33h 20m

$613

LondonPortland

LGW - PDX

LGWPDX

London Gatwick

Mon 9/29

9:50 am-10:47 pm

2 stops20h 57m

Portland

Sun 10/5

7:00 am-10:55 am

1 stop19h 55m

$625

LondonPortland

LGW - PDX

LGWPDX

London Gatwick

Tue 9/9

1:00 pm-5:55 pm

1 stop12h 55m

Portland

Mon 9/15

3:20 pm-2:35 pm

1 stop15h 15m

$640

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Mon 9/1

9:25 pm-5:55 pm

1 stop28h 30m

Portland

Mon 9/15

3:20 pm-8:20 pm

1 stop21h 00m

$641

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Tue 9/9

3:40 pm-5:35 pm

Nonstop9h 55m

Portland

Mon 9/15

10:28 am-7:20 am

1 stop12h 52m

$709

LondonPortland

LGW - PDX

LGWPDX

London Gatwick

Wed 9/17

6:35 pm-6:46 pm

2 stops32h 11m

Portland

Sun 9/21

10:51 am-5:50 pm

2 stops22h 59m

$711

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Fri 9/19

6:00 am-6:46 pm

2 stops20h 46m

Portland

Tue 9/23

8:30 am-7:55 am

2 stops39h 25m

$715

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Tue 9/2

3:40 pm-5:35 pm

Nonstop9h 55m

Portland

Tue 9/16

11:18 am-9:05 am

1 stop13h 47m

$730

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Mon 8/25

3:40 pm-5:35 pm

Nonstop9h 55m

Portland

Tue 9/9

7:25 pm-1:00 pm

Nonstop9h 35m

$741

LondonPortland

LHR - PDX

LHRPDX

London Heathrow

Tue 9/9

3:40 pm-5:35 pm

Nonstop9h 55m

Portland

Mon 9/15

10:28 am-10:30 am

1 stop16h 02m

$747

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Portland from

How to get the cheapest flight ticket from London to Portland

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 London and Portland?

What is the cheapest month to fly to Portland?

The cheapest month to fly to Portland from London is in February. Flight prices, which tend to average around $766, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in February, then you should wait until March to fly from London, when ticket prices are also cheap, with an average price of $766.

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

The cheapest day to depart on your flight to Portland is on a Monday when prices can be found for as low as $879. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Portland is Sunday, with ticket prices averaging around $1,278.

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

The cheapest time of day to fly to Portland is in the afternoon when flights can be purchased for as low as $953. In the morning is when there is more demand to fly to Portland, so prices are often more expensive at around $1,188 per ticket.

What is the cheapest London to Portland flight route?

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

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

You are more likely to see cheaper flights to Portland from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Portland for around $889 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland from London for as low as $807 on momondo.

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

There are 3 cabin classes available to choose from on London to Portland 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 London to Portland flights?

No. A direct flight is the cheapest option for a flight between London to Portland.

How have London to Portland flight prices changed over time?

As of July 2025, prices for London to Portland flights are approximately 3% cheaper when compared to flights at the same time last year.

When to book flights from London to Portland

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

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

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

Best Price Found

$381

Fastest flight time

9h 55m

Direct flights

Every day

Airports in Portland

1 airport
The best one-way flight to Portland from London in the past 72 hours is $381. The best round-trip flight deal from London to Portland found on momondo in the last 72 hours is $613.
The fastest flight from London to Portland takes 9h 55m
Direct flights go from London to Portland every day.
There is 1 airport near Portland: Portland (PDX)
Search flight deals

  • How far is London to Portland by plane?

    The distance between London and Portland is about 4909.8 mi. Typically, this will take 9h 55m by plane in normal conditions.

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

    Prices for flights from London to Portland Airport are updated daily.

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

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

    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 London to Portland Airport.

  • What documentation or ID do you need to fly to Portland Airport?

    The travel and health documents you'll need for your trip to Portland 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 Portland 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 London to Portland?

  • What is the most popular airline from London to Portland?

Best airlines flying from London to Portland

Compare and see reviews for airlines that fly from London to Portland with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $701Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
British AirwaysPriceFrom $733Free CancellationRating
6.6
7,222 reviews
Search British Airways flights
American AirlinesPriceFrom $782Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
IberiaPriceFrom $784Free CancellationRating
7.0
2,859 reviews
Search Iberia flights

  • American Airlines Flights From London to Portland

    American Airlines is one of the most popular airlines flying from London to Portland, operating 2 flights/week on average for this route. A good American Airlines flight deal for London to Portland starts from $782 round-trip, up to an average price of $953. Our users have rated American Airlines at 7.2/10.

  • Iberia Flights From London to Portland

    Across 2,859 Iberia reviews on momondo, the average score is 7.0/10. Iberia flies from London to Portland about 2 times each week, with ticket deals ranging from $784 to $979. Price data is based on momondo searches in the last 72 hours.

Traveling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
Lincoln City
Seaside
Cannon Beach
Vancouver
Salem
Astoria
Long Beach
Depoe Bay
Beaverton
Rockaway Beach
Hood River
Hillsboro
Gresham
McMinnville
Tigard
Longview
Pacific City
Manzanita
The Dalles
Tillamook

Why use momondo?

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

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 Portland from London.

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

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

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Portland.

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

If you are not ready to book a flight from London to Portland now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Portland and let you know when they change.

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