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Cheap flights from Portland to the United Kingdom from $248

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 the United Kingdom departing on 4/27. 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 Portland to the United Kingdom

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:30 pm - 6:50 pm
PDX
-
STN
19h 20m
2 stops
Multiple Airlines Logo
8:15 am - 6:00 pm
STN
-
PDX
17h 45m
2 stops
$676Multiple Airlines
Mon, Apr 20 - Mon, Apr 27
Multiple Airlines Logo
3:30 pm - 8:10 pm
PDX
-
LGW
20h 40m
2 stops
Multiple Airlines Logo
8:50 am - 9:30 am
LGW
-
PDX
32h 40m
3 stops
$677Multiple Airlines
Mon, Apr 27 - Tue, May 12
Icelandair Logo
3:30 pm - 11:55 am
PDX
-
LHR
12h 25m
1 stop
Icelandair Logo
9:25 pm - 6:00 pm
LHR
-
PDX
28h 35m
1 stop
$699Icelandair
Mon, Apr 27 - Tue, May 12
Icelandair Logo
3:30 pm - 2:40 pm
PDX
-
LGW
15h 10m
1 stop
Icelandair Logo
3:40 pm - 6:00 pm
LGW
-
PDX
34h 20m
1 stop
$700Icelandair
Mon, Apr 13 - Tue, Apr 28
American Airlines Logo
12:32 pm - 2:55 pm
PDX
-
INV
18h 23m
2 stops
American Airlines Logo
7:35 am - 10:50 pm
INV
-
PDX
23h 15m
2 stops
$728American Airlines
Wed, Sep 16 - Wed, Sep 30
American Airlines Logo
7:30 pm - 9:30 pm
PDX
-
INV
18h 00m
1 stop
American Airlines Logo
7:35 am - 10:50 pm
INV
-
PDX
23h 15m
2 stops
$764American Airlines
Wed, Sep 16 - Wed, Sep 30
Delta Logo
1:05 pm - 12:45 pm
PDX
-
INV
15h 40m
1 stop
Delta Logo
6:25 am - 11:10 am
INV
-
PDX
12h 45m
1 stop
$784Delta
Sun, May 3 - Tue, May 12
British Airways Logo
7:30 pm - 9:35 am
PDX
-
INV
30h 05m
1 stop
British Airways Logo
7:20 am - 5:40 pm
INV
-
PDX
18h 20m
1 stop
$787British Airways
Mon, May 4 - Tue, May 12
Delta Logo
12:30 am - 12:45 pm
PDX
-
INV
28h 15m
2 stops
Delta Logo
1:15 pm - 11:10 am
INV
-
PDX
29h 55m
1 stop
$788Delta
Sat, May 2 - Mon, May 11
British Airways Logo
7:30 pm - 9:35 pm
PDX
-
INV
18h 05m
1 stop
British Airways Logo
3:45 pm - 5:40 pm
INV
-
PDX
33h 55m
1 stop
$813British Airways
Sat, May 2 - Mon, May 11

Icelandair flights from Portland to United Kingdom

Our best Icelandair deals on Portland to United Kingdom flight tickets
Icelandair
Apr 27
PDX3:30 pmPortland
12h 25m
1 stop
LHR11:55 amLondon Heathrow
May 12
LHR9:25 pmLondon Heathrow
28h 35m
1 stop
PDX6:00 pmPortland
$699
Icelandair
Apr 13
PDX3:30 pmPortland
15h 10m
1 stop
LGW2:40 pmLondon Gatwick
Apr 28
LGW3:40 pmLondon Gatwick
34h 20m
1 stop
PDX6:00 pmPortland
$700
Icelandair
Apr 13
PDX3:30 pmPortland
20h 50m
1 stop
LHR8:20 pmLondon Heathrow
Apr 28
LHR9:25 pmLondon Heathrow
28h 35m
1 stop
PDX6:00 pmPortland
$701

KLM flights from Portland to United Kingdom

Our best KLM deals on Portland to United Kingdom flight tickets
KLM
May 2
PDX1:05 pmPortland
13h 20m
1 stop
INV10:25 amInverness
May 10
INV6:25 amInverness
12h 45m
1 stop
PDX11:10 amPortland
$884
KLM
May 2
PDX7:00 amPortland
19h 25m
2 stops
INV10:25 amInverness
May 8
INV1:15 pmInverness
29h 55m
1 stop
PDX11:10 amPortland
$888
KLM
Apr 1
PDX6:30 amPortland
15h 55m
1 stop
LHR6:25 amLondon Heathrow
Apr 8
LHR6:30 amLondon Heathrow
12h 40m
1 stop
PDX11:10 amPortland
$943

momondo Fare Finder

 
Customize your flight search to find flights from Portland to United Kingdom 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 March 23, 2026.
Use the filters below to find and compare flights from Portland to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandLondon

PDX - STN

PDXSTN

Portland

Mon 4/20

3:30 pm-6:50 pm

2 stops19h 20m

London Stansted

Mon 4/27

8:15 am-6:00 pm

2 stops17h 45m

$676

PortlandLondon

PDX - LGW

PDXLGW

Portland

Mon 4/27

3:30 pm-8:10 pm

2 stops20h 40m

London Gatwick

Tue 5/12

8:50 am-9:30 am

3 stops32h 40m

$677

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 4/27

3:30 pm-11:55 am

1 stop12h 25m

London Heathrow

Tue 5/12

9:25 pm-6:00 pm

1 stop28h 35m

$699

PortlandLondon

PDX - LGW

PDXLGW

Portland

Mon 4/13

3:30 pm-2:40 pm

1 stop15h 10m

London Gatwick

Tue 4/28

3:40 pm-6:00 pm

1 stop34h 20m

$700

PortlandInverness

PDX - INV

PDXINV

Portland

Wed 9/16

12:32 pm-2:55 pm

2 stops18h 23m

Inverness

Wed 9/30

7:35 am-10:50 pm

2 stops23h 15m

$728

PortlandInverness

PDX - INV

PDXINV

Portland

Wed 9/16

7:30 pm-9:30 pm

1 stop18h 00m

Inverness

Wed 9/30

7:35 am-10:50 pm

2 stops23h 15m

$764
Quickest round-trip

PortlandInverness

PDX - INV

PDXINV

Portland

Sun 5/3

1:05 pm-12:45 pm

1 stop15h 40m

Inverness

Tue 5/12

6:25 am-11:10 am

1 stop12h 45m

$784

PortlandInverness

PDX - INV

PDXINV

Portland

Mon 5/4

7:30 pm-9:35 am

1 stop30h 05m

Inverness

Tue 5/12

7:20 am-5:40 pm

1 stop18h 20m

$787

PortlandInverness

PDX - INV

PDXINV

Portland

Sat 5/2

12:30 am-12:45 pm

2 stops28h 15m

Inverness

Mon 5/11

1:15 pm-11:10 am

1 stop29h 55m

$788

PortlandInverness

PDX - INV

PDXINV

Portland

Sat 5/2

7:30 pm-9:35 pm

1 stop18h 05m

Inverness

Mon 5/11

3:45 pm-5:40 pm

1 stop33h 55m

$813

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 the United Kingdom from

How to get the cheapest flight ticket from Portland to United Kingdom

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 cheapest month to fly to United Kingdom?

In general, October is the cheapest month to fly from Portland to United Kingdom. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $645. If you aren’t able to travel to United Kingdom during the month of October, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $658.

What is the cheapest day to depart on your flight to United Kingdom?

The cheapest day to depart from Portland to United Kingdom is on a Monday when prices can be found for as low as $832. The most expensive day to fly to United Kingdom is Saturday, with ticket prices averaging around $979.

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

According to our data, the cheapest time of day to fly to United Kingdom is in the afternoon. momondo users have found flights departing from Portland to United Kingdom in the afternoon for as low as $728. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to United Kingdom are more costly in the evening, with an average ticket price of $901. 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 United Kingdom flight route?

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

How far in advance should I book a flight to United Kingdom?

You are more likely to see cheaper flights to United Kingdom from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around $837 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from Portland for as low as $734 on momondo.

What cabin class options are available on Portland to United Kingdom flights?

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

You could potentially save up to 48% on your flight if you consider stops on a Portland to United Kingdom flight.

Cheap Portland to United Kingdom flight deals and tips

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

Best Price Found

$455

Fastest flight time

9h 30m

Direct flights

Every day

Airports in United Kingdom

1,286 airports
The best one-way flight to United Kingdom from Portland in the past 72 hours is $455. The best round-trip flight deal from Portland to United Kingdom found on momondo in the last 72 hours is $798.
The fastest flight from Portland to United Kingdom takes 9h 30m
Direct flights go from Portland to United Kingdom every day.
There are 1,286 airports in United Kingdom. From Portland there are direct flights to London Heathrow (LHR).
Search flight deals

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

    Prices for flights from Portland Airport to United Kingdom refresh daily.

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

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

    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 United Kingdom.

  • What documentation or ID do you need to fly to United Kingdom?

    The required travel and health documents for your United Kingdom 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 United Kingdom. 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 United Kingdom?

Best airlines flying from Portland to United Kingdom

Compare and see reviews for airlines that fly from Portland to United Kingdom with momondo
Airline
Rating
Free Cancellation
Price
Scandinavian AirlinesPriceFrom $364Free CancellationRating
7.3
1,721 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom $489Free CancellationRating
7.0
625 reviews
Search Icelandair flights
British AirwaysPriceFrom $495Free CancellationRating
6.7
7,813 reviews
Search British Airways flights
DeltaPriceFrom $558Free CancellationRating
7.9
8,319 reviews
Search Delta flights
KLMPriceFrom $561Free CancellationRating
7.8
1,477 reviews
Search KLM flights
Virgin AtlanticPriceFrom $579Free CancellationRating
7.5
685 reviews
Search Virgin Atlantic flights
American AirlinesPriceFrom $583Free CancellationRating
7.1
11,490 reviews
Search American Airlines flights
IberiaPriceFrom $589Free CancellationRating
7.0
3,147 reviews
Search Iberia flights
Alaska AirlinesPriceFrom $600Free CancellationRating
7.9
12,097 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $607Free CancellationRating
7.4
9,460 reviews
Search United Airlines flights

Why use momondo?

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

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 United Kingdom from Portland.

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

Yes. All flights to United Kingdom from Portland on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Portland to United Kingdom?

momondo provides multiple filters to help you find the best flight to United Kingdom from Portland. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to United Kingdom from Portland are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your United Kingdom trip

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Find better results for your trip to the United Kingdom

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
Flights to Londonfrom $424
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Flights to Edinburghfrom $533
Flights to Glasgowfrom $512
Flights to Birminghamfrom $544
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Flights to Belfastfrom $625
Flights to Bristolfrom $547
Flights to Invernessfrom $645
Flights to Leedsfrom $586
Flights to Liverpoolfrom $545
Flights to Aberdeenfrom $635