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Cheap flights from Portland to the United Kingdom from $283

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 3/10. 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
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.
British Airways Logo
5:44 am - 7:00 pm
PDX
-
INV
29h 16m2 stops
British Airways Logo
10:30 am - 4:55 pm
INV
-
PDX
13h 25m1 stop
$495British Airways
Sun, Mar 1 - Wed, Mar 11
British Airways Logo
6:00 am - 11:50 am
PDX
-
INV
21h 50m2 stops
British Airways Logo
7:45 pm - 8:27 pm
INV
-
PDX
32h 42m2 stops
$498British Airways
Mon, Jan 26 - Mon, Feb 2
American Airlines Logo
5:44 am - 11:10 am
PDX
-
INV
21h 26m2 stops
American Airlines Logo
10:30 am - 11:07 am
INV
-
PDX
31h 37m2 stops
$512American Airlines
Sun, Mar 1 - Wed, Mar 11
Delta Logo
10:00 am - 12:45 pm
PDX
-
INV
18h 45m2 stops
Delta Logo
1:15 pm - 11:25 am
INV
-
PDX
30h 10m1 stop
$514Delta
Tue, Jan 13 - Tue, Jan 20
American Airlines Logo
5:25 am - 9:40 am
PDX
-
INV
20h 15m3 stops
American Airlines Logo
12:45 pm - 6:51 pm
INV
-
PDX
38h 06m2 stops
$516American Airlines
Tue, Jan 13 - Tue, Jan 20
Icelandair Logo
3:30 pm - 1:25 pm
PDX
-
GLA
13h 55m1 stop
Icelandair Logo
2:20 pm - 11:45 am
GLA
-
PDX
29h 25m1 stop
$522Icelandair
Sat, May 9 - Wed, May 20
Delta Logo
1:53 pm - 12:45 pm
PDX
-
INV
38h 52m2 stops
Delta Logo
1:15 pm - 4:08 pm
INV
-
PDX
34h 53m2 stops
$529Delta
Fri, Jan 23 - Fri, Jan 30
Virgin Atlantic Logo
1:25 pm - 10:15 am
PDX
-
EDI
12h 50m1 stop
Virgin Atlantic Logo
5:45 am - 11:25 am
EDI
-
PDX
13h 40m1 stop
$591Virgin Atlantic
Sun, Jan 25 - Sun, Feb 1
Virgin Atlantic Logo
6:00 am - 10:40 am
PDX
-
EDI
20h 40m2 stops
Virgin Atlantic Logo
5:50 am - 6:50 pm
EDI
-
PDX
21h 00m2 stops
$596Virgin Atlantic
Sun, Jan 25 - Tue, Feb 10
Icelandair Logo
3:30 pm - 11:55 am
PDX
-
LHR
12h 25m1 stop
Icelandair Logo
1:05 pm - 6:00 pm
LHR
-
PDX
12h 55m1 stop
$600Icelandair
Thu, Apr 9 - Fri, Apr 17

Lufthansa flights from Portland to United Kingdom

Our best Lufthansa deals on Portland to United Kingdom flight tickets
Lufthansa
Jan 28
PDX9:50 amPortland
16h 20m
2 stops
LHR10:10 amLondon Heathrow
Feb 11
LHR6:35 amLondon Heathrow
26h 04m
2 stops
PDX12:39 amPortland
$592
Find similar
Lufthansa
Jan 7
PDX7:00 amPortland
16h 55m
1 stop
LHR7:55 amLondon Heathrow
Jan 15
LHR8:45 amLondon Heathrow
23h 54m
2 stops
PDX12:39 amPortland
$596
Find similar
Lufthansa
Jan 25
PDX7:00 amPortland
16h 55m
2 stops
EDI7:55 amEdinburgh Turnhouse
Feb 10
EDI9:25 amEdinburgh Turnhouse
20h 24m
1 stop
PDX9:49 pmPortland
$600
Find similar

KLM flights from Portland to United Kingdom

Our best KLM deals on Portland to United Kingdom flight tickets
KLM
Feb 10
PDX6:00 amPortland
17h 05m
1 stop
LHR7:05 amLondon Heathrow
Feb 25
LHR6:30 amLondon Heathrow
12h 55m
1 stop
PDX11:25 amPortland
$615
Find similar
KLM
Mar 2
PDX7:00 amPortland
17h 30m
2 stops
GLA8:30 amGlasgow Intl
Mar 18
GLA6:05 amGlasgow Intl
13h 20m
1 stop
PDX12:25 pmPortland
$618
Find similar
KLM
Mar 2
PDX6:00 amPortland
18h 30m
2 stops
GLA8:30 amGlasgow Intl
Mar 24
GLA5:20 pmGlasgow Intl
26h 05m
1 stop
PDX12:25 pmPortland
$623
Find similar

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 December 11, 2025.
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

PortlandInverness

PDX - INV

PDXINV

Portland

Sun 3/1

5:44 am-7:00 pm

2 stops29h 16m

Inverness

Wed 3/11

10:30 am-4:55 pm

1 stop13h 25m

$495

PortlandInverness

PDX - INV

PDXINV

Portland

Mon 1/26

6:00 am-11:50 am

2 stops21h 50m

Inverness

Mon 2/2

7:45 pm-8:27 pm

2 stops32h 42m

$498

PortlandInverness

PDX - INV

PDXINV

Portland

Sun 3/1

5:44 am-11:10 am

2 stops21h 26m

Inverness

Wed 3/11

10:30 am-11:07 am

2 stops31h 37m

$512

PortlandInverness

PDX - INV

PDXINV

Portland

Tue 1/13

10:00 am-12:45 pm

2 stops18h 45m

Inverness

Tue 1/20

1:15 pm-11:25 am

1 stop30h 10m

$514

PortlandInverness

PDX - INV

PDXINV

Portland

Tue 1/13

5:25 am-9:40 am

3 stops20h 15m

Inverness

Tue 1/20

12:45 pm-6:51 pm

2 stops38h 06m

$516

PortlandGlasgow

PDX - GLA

PDXGLA

Portland

Sat 5/9

3:30 pm-1:25 pm

1 stop13h 55m

Glasgow Intl

Wed 5/20

2:20 pm-11:45 am

1 stop29h 25m

$522

PortlandInverness

PDX - INV

PDXINV

Portland

Fri 1/23

1:53 pm-12:45 pm

2 stops38h 52m

Inverness

Fri 1/30

1:15 pm-4:08 pm

2 stops34h 53m

$529

PortlandEdinburgh

PDX - EDI

PDXEDI

Portland

Sun 1/25

1:25 pm-10:15 am

1 stop12h 50m

Edinburgh Turnhouse

Sun 2/1

5:45 am-11:25 am

1 stop13h 40m

$591

PortlandEdinburgh

PDX - EDI

PDXEDI

Portland

Sun 1/25

6:00 am-10:40 am

2 stops20h 40m

Edinburgh Turnhouse

Tue 2/10

5:50 am-6:50 pm

2 stops21h 00m

$596

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 4/9

3:30 pm-11:55 am

1 stop12h 25m

London Heathrow

Fri 4/17

1:05 pm-6:00 pm

1 stop12h 55m

$600

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 $659.

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 Tuesday when prices can be found for as low as $846. The most expensive day to fly to United Kingdom is Saturday, with ticket prices averaging around $1,008.

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 $754. 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 $928. 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 $833 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 $745 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 30% 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

$414

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 $414. The best round-trip flight deal from Portland to United Kingdom found on momondo in the last 72 hours is $669.
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
KLMPriceFrom $451Free CancellationRating
7.7
1,432 reviews
Search KLM flights
British AirwaysPriceFrom $495Free CancellationRating
6.7
7,571 reviews
Search British Airways flights
IcelandairPriceFrom $496Free CancellationRating
7.0
589 reviews
Search Icelandair flights
DeltaPriceFrom $552Free CancellationRating
7.9
8,007 reviews
Search Delta flights
Virgin AtlanticPriceFrom $558Free CancellationRating
7.5
675 reviews
Search Virgin Atlantic flights
IberiaPriceFrom $577Free CancellationRating
7.0
3,045 reviews
Search Iberia flights
American AirlinesPriceFrom $583Free CancellationRating
7.2
11,049 reviews
Search American Airlines flights
Alaska AirlinesPriceFrom $600Free CancellationRating
8.0
11,432 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $619Free CancellationRating
7.4
9,095 reviews
Search United Airlines flights
FinnairPriceFrom $641Free CancellationRating
7.6
1,334 reviews
Search Finnair 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 $330
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Flights to Edinburghfrom $386
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Flights to Glasgowfrom $388
Flights to Newcastle upon Tynefrom $440
Flights to Belfastfrom $487
Flights to Bristolfrom $452
Flights to Invernessfrom $416
Flights to Liverpoolfrom $435
Flights to Aberdeenfrom $521
Flights to Leedsfrom $447