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Cheap flights from Portland to the United Kingdom from $110

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 10/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Portland to the United Kingdom

Cheap round-trip flights

Enter your travel dates to find the best prices.
Virgin Atlantic Logo
1:05 pm - 10:30 pm
PDX
-
INV
25h 25m
1 stop
Virgin Atlantic Logo
6:20 am - 11:10 am
INV
-
PDX
12h 50m
1 stop
$417Virgin Atlantic
Wed, Sep 9 - Wed, Sep 16
Virgin Atlantic Logo
1:05 pm - 10:30 pm
PDX
-
INV
25h 25m
1 stop
Virgin Atlantic Logo
6:20 am - 10:31 pm
INV
-
PDX
24h 11m
2 stops
$422Virgin Atlantic
Wed, Sep 9 - Wed, Sep 16
Icelandair Logo
3:30 pm - 1:25 pm
PDX
-
GLA
13h 55m
1 stop
Icelandair Logo
2:20 pm - 5:55 pm
GLA
-
PDX
11h 35m
1 stop
$755Icelandair
Wed, Oct 7 - Wed, Oct 21
United Airlines Logo
8:00 am - 10:20 am
PDX
-
MAN
18h 20m
2 stops
United Airlines Logo
6:10 am - 9:21 pm
MAN
-
PDX
23h 11m
2 stops
$805United Airlines
Mon, Dec 7 - Wed, Dec 9
United Airlines Logo
8:00 am - 10:20 am
PDX
-
MAN
18h 20m
2 stops
United Airlines Logo
9:30 am - 8:33 pm
MAN
-
PDX
43h 03m
3 stops
$817United Airlines
Mon, Dec 7 - Wed, Dec 9
Icelandair Logo
7:05 pm - 11:40 am
PDX
-
MAN
32h 35m
1 stop
Icelandair Logo
1:05 pm - 5:55 pm
MAN
-
PDX
12h 50m
1 stop
$829Icelandair
Wed, Aug 19 - Wed, Aug 26
British Airways Logo
11:48 am - 2:55 pm
PDX
-
INV
19h 07m
2 stops
British Airways Logo
10:35 am - 12:07 am
INV
-
PDX
21h 32m
2 stops
$840British Airways
Wed, Sep 9 - Wed, Sep 16
British Airways Logo
5:18 am - 9:35 pm
PDX
-
INV
32h 17m
2 stops
British Airways Logo
7:20 am - 11:28 pm
INV
-
PDX
24h 08m
2 stops
$861British Airways
Tue, Sep 1 - Tue, Sep 22
Delta Logo
9:32 am - 12:10 pm
PDX
-
LHR
18h 38m
1 stop
Delta Logo
9:20 am - 9:44 pm
LHR
-
PDX
20h 24m
1 stop
$922Delta
Sat, Jul 18 - Mon, Aug 17
Delta Logo
1:30 pm - 1:45 pm
PDX
-
LHR
16h 15m
2 stops
Delta Logo
10:45 am - 10:09 pm
LHR
-
PDX
19h 24m
1 stop
$927Delta
Sat, Aug 8 - Sun, Aug 16

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Lufthansa flights from Portland to United Kingdom

Our best Lufthansa deals on Portland to United Kingdom flight tickets
Lufthansa
Sep 5
PDX7:15 pmPortland
28h 10m
1 stop
LHR7:25 amLondon Heathrow
Sep 12
LHR5:40 pmLondon Heathrow
33h 31m
2 stops
PDX7:11 pmPortland
$930
Lufthansa
Sep 18
PDX12:45 pmPortland
12h 55m
1 stop
LHR9:40 amLondon Heathrow
Sep 27
LHR9:30 amLondon Heathrow
17h 36m
2 stops
PDX7:06 pmPortland
$935
Lufthansa
Jul 5
PDX10:10 amPortland
17h 40m
2 stops
LHR11:50 amLondon Heathrow
Aug 19
LHR7:30 amLondon Heathrow
19h 41m
2 stops
PDX7:11 pmPortland
$1,133

Finnair flights from Portland to United Kingdom

Our best Finnair deals on Portland to United Kingdom flight tickets
Finnair
Aug 13
PDX12:24 pmPortland
14h 06m
1 stop
LHR10:30 amLondon Heathrow
Aug 27
LHR3:40 pmLondon Heathrow
10h 00m
PDX5:40 pmPortland
$957
Finnair
Aug 16
PDX7:30 pmPortland
9h 30m
LHR1:00 pmLondon Heathrow
Aug 28
LHR3:15 pmLondon Heathrow
16h 44m
1 stop
PDX11:59 pmPortland
$969
Finnair
Aug 17
PDX7:30 pmPortland
9h 30m
LHR1:00 pmLondon Heathrow
Sep 2
LHR8:55 amLondon Heathrow
18h 04m
1 stop
PDX6:59 pmPortland
$975

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 June 26, 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

PortlandInverness

PDX - INV

PDXINV

Portland

Wed 9/9

1:05 pm-10:30 pm

1 stop25h 25m

Inverness

Wed 9/16

6:20 am-11:10 am

1 stop12h 50m

$417

PortlandInverness

PDX - INV

PDXINV

Portland

Wed 9/9

1:05 pm-10:30 pm

1 stop25h 25m

Inverness

Wed 9/16

6:20 am-10:31 pm

2 stops24h 11m

$422
Quickest round-trip

PortlandGlasgow

PDX - GLA

PDXGLA

Portland

Wed 10/7

3:30 pm-1:25 pm

1 stop13h 55m

Glasgow Intl

Wed 10/21

2:20 pm-5:55 pm

1 stop11h 35m

$755

PortlandManchester

PDX - MAN

PDXMAN

Portland

Mon 12/7

8:00 am-10:20 am

2 stops18h 20m

Manchester

Wed 12/9

6:10 am-9:21 pm

2 stops23h 11m

$805

PortlandManchester

PDX - MAN

PDXMAN

Portland

Mon 12/7

8:00 am-10:20 am

2 stops18h 20m

Manchester

Wed 12/9

9:30 am-8:33 pm

3 stops43h 03m

$817

PortlandManchester

PDX - MAN

PDXMAN

Portland

Wed 8/19

7:05 pm-11:40 am

1 stop32h 35m

Manchester

Wed 8/26

1:05 pm-5:55 pm

1 stop12h 50m

$829

PortlandInverness

PDX - INV

PDXINV

Portland

Wed 9/9

11:48 am-2:55 pm

2 stops19h 07m

Inverness

Wed 9/16

10:35 am-12:07 am

2 stops21h 32m

$840

PortlandInverness

PDX - INV

PDXINV

Portland

Tue 9/1

5:18 am-9:35 pm

2 stops32h 17m

Inverness

Tue 9/22

7:20 am-11:28 pm

2 stops24h 08m

$861

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 7/18

9:32 am-12:10 pm

1 stop18h 38m

London Heathrow

Mon 8/17

9:20 am-9:44 pm

1 stop20h 24m

$922

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 8/8

1:30 pm-1:45 pm

2 stops16h 15m

London Heathrow

Sun 8/16

10:45 am-10:09 pm

1 stop19h 24m

$927

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, April 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 $465. If you aren’t able to travel to United Kingdom during the month of April, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $465.

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 $884. The most expensive day to fly to United Kingdom is Saturday, with ticket prices averaging around $1,037.

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 $745. 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 $976. 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 from Portland to the 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 $896 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 $783 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

$413

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 $413. The best round-trip flight deal from Portland to United Kingdom found on momondo in the last 72 hours is $1,024.
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

Frequently asked questions about flying from Portland to the United Kingdom

  • 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
IcelandairPriceFrom $472Free CancellationRating
7.0
690 reviews
Search Icelandair flights
British AirwaysPriceFrom $495Free CancellationRating
6.7
8,071 reviews
Search British Airways flights
IberiaPriceFrom $525Free CancellationRating
7.0
3,246 reviews
Search Iberia flights
DeltaPriceFrom $551Free CancellationRating
7.8
8,446 reviews
Search Delta flights
Virgin AtlanticPriceFrom $558Free CancellationRating
7.5
690 reviews
Search Virgin Atlantic flights
KLMPriceFrom $594Free CancellationRating
7.8
1,531 reviews
Search KLM flights
Alaska AirlinesPriceFrom $600Free CancellationRating
7.9
12,577 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $604Free CancellationRating
7.4
9,893 reviews
Search United Airlines flights
Air CanadaPriceFrom $630Free CancellationRating
7.1
11,260 reviews
Search Air Canada flights
LufthansaPriceFrom $630Free CancellationRating
6.8
8,094 reviews
Search Lufthansa 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.

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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 $369
Flights to Manchesterfrom $192
Flights to Edinburghfrom $149
Flights to Glasgowfrom $145
Flights to Birminghamfrom $464
Flights to Newcastle upon Tynefrom $397
Flights to Belfastfrom $330
Flights to Bristolfrom $539
Flights to Invernessfrom $393
Flights to Liverpoolfrom $636
Flights to Aberdeenfrom $253
Flights to Leedsfrom $439