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Cheap flights from Portland to the United Kingdom from $244

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 9/23. 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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Find the cheapest flights from Portland to the United Kingdom

Cheap round-trip flights

Logo
6:15 am - 12:00 pmPDX-STN
21h 45m3 stops
Logo
6:30 am - 11:01 pmSTN-PDX
24h 31m3 stops
$461
Find Deal
Tue, Oct 14 - Wed, Oct 22
Icelandair Logo
2:45 pm - 10:55 amPDX-LGW
12h 10m1 stop
Icelandair Logo
11:55 am - 5:00 pmLGW-PDX
13h 05m1 stop
$487Icelandair
Find Deal
Mon, Nov 3 - Mon, Nov 17
Virgin Atlantic Logo
5:45 pm - 2:15 pmPDX-LHR
12h 30m1 stop
Virgin Atlantic Logo
8:55 pm - 11:20 amLHR-PDX
22h 25m1 stop
$517Virgin Atlantic
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Mon, Aug 25 - Tue, Sep 9
Virgin Atlantic Logo
4:58 pm - 1:10 pmPDX-LHR
12h 12m1 stop
Virgin Atlantic Logo
8:55 pm - 11:20 amLHR-PDX
22h 25m1 stop
$521Virgin Atlantic
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Mon, Aug 25 - Tue, Sep 9
British Airways Logo
7:25 pm - 1:00 pmPDX-LHR
9h 35mnonstop
British Airways Logo
1:45 pm - 4:55 pmLHR-PDX
10h 10mnonstop
$522British Airways
Find Deal
Wed, Oct 22 - Fri, Oct 31
British Airways Logo
6:45 pm - 11:20 amPDX-LHR
9h 35mnonstop
British Airways Logo
1:45 pm - 3:55 pmLHR-PDX
10h 10mnonstop
$523British Airways
Find Deal
Mon, Oct 27 - Wed, Nov 5
American Airlines Logo
7:25 pm - 1:00 pmPDX-LHR
9h 35mnonstop
American Airlines Logo
3:40 pm - 5:35 pmLHR-PDX
9h 55mnonstop
$541American Airlines
Find Deal
Mon, Aug 25 - Tue, Sep 9
Delta Logo
1:36 pm - 4:40 pmPDX-LCY
19h 04m2 stops
Delta Logo
10:00 am - 11:20 amLCY-PDX
33h 20m1 stop
$600Delta
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Tue, Sep 9 - Tue, Sep 16
Delta Logo
1:15 pm - 8:50 amPDX-LCY
11h 35m1 stop
Delta Logo
9:20 am - 6:45 pmLCY-PDX
17h 25m2 stops
$603Delta
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Mon, Aug 11 - Thu, Aug 21
American Airlines Logo
7:40 am - 9:40 amPDX-GLA
18h 00m2 stops
American Airlines Logo
10:00 am - 11:06 pmGLA-PDX
21h 06m2 stops
$655American Airlines
Find Deal
Tue, Oct 14 - Thu, Oct 23

Air Canada flights from Portland to United Kingdom

Our best Air Canada deals on Portland to United Kingdom flight tickets
Air Canada
Sep 14
PDX6:15 amPortland
16h 15m
2 stops
LHR6:30 amLondon Heathrow
Sep 30
LHR2:10 pmLondon Heathrow
16h 51m
1 stop
PDX11:01 pmPortland
$544
Find similar
Air Canada
Oct 20
PDX3:25 pmPortland
13h 55m
1 stop
LHR1:20 pmLondon Heathrow
Oct 30
LHR3:00 pmLondon Heathrow
25h 15m
2 stops
PDX9:15 amPortland
$545
Find similar
Air Canada
Aug 12
PDX5:25 amPortland
20h 35m
2 stops
LHR10:00 amLondon Heathrow
Aug 21
LHR2:05 pmLondon Heathrow
36h 41m
2 stops
PDX6:46 pmPortland
$595
Find similar

British Airways flights from Portland to United Kingdom

Our best British Airways deals on Portland to United Kingdom flight tickets
British Airways
Oct 22
PDX7:25 pmPortland
9h 35m
LHR1:00 pmLondon Heathrow
Oct 31
LHR1:45 pmLondon Heathrow
10h 10m
PDX4:55 pmPortland
$522
Find similar
British Airways
Oct 27
PDX6:45 pmPortland
9h 35m
LHR11:20 amLondon Heathrow
Nov 5
LHR1:45 pmLondon Heathrow
10h 10m
PDX3:55 pmPortland
$523
Find similar
British Airways
Sep 22
PDX2:06 pmPortland
14h 39m
1 stop
LHR12:45 pmLondon Heathrow
Oct 3
LHR3:40 pmLondon Heathrow
9h 55m
PDX5:35 pmPortland
$527
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 August 2, 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

PortlandLondon

PDX - STN

PDXSTN

Portland

Tue 10/14

6:15 am-12:00 pm

3 stops21h 45m

London Stansted

Wed 10/22

6:30 am-11:01 pm

3 stops24h 31m

$461

PortlandLondon

PDX - LGW

PDXLGW

Portland

Mon 11/3

2:45 pm-10:55 am

1 stop12h 10m

London Gatwick

Mon 11/17

11:55 am-5:00 pm

1 stop13h 05m

$487

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 8/25

5:45 pm-2:15 pm

1 stop12h 30m

London Heathrow

Tue 9/9

8:55 pm-11:20 am

1 stop22h 25m

$517

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 8/25

4:58 pm-1:10 pm

1 stop12h 12m

London Heathrow

Tue 9/9

8:55 pm-11:20 am

1 stop22h 25m

$521

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 10/22

7:25 pm-1:00 pm

Nonstop9h 35m

London Heathrow

Fri 10/31

1:45 pm-4:55 pm

Nonstop10h 10m

$522

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 10/27

6:45 pm-11:20 am

Nonstop9h 35m

London Heathrow

Wed 11/5

1:45 pm-3:55 pm

Nonstop10h 10m

$523

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 8/25

7:25 pm-1:00 pm

Nonstop9h 35m

London Heathrow

Tue 9/9

3:40 pm-5:35 pm

Nonstop9h 55m

$541

PortlandLondon

PDX - LCY

PDXLCY

Portland

Tue 9/9

1:36 pm-4:40 pm

2 stops19h 04m

London City

Tue 9/16

10:00 am-11:20 am

1 stop33h 20m

$600

PortlandLondon

PDX - LCY

PDXLCY

Portland

Mon 8/11

1:15 pm-8:50 am

1 stop11h 35m

London City

Thu 8/21

9:20 am-6:45 pm

2 stops17h 25m

$603

PortlandGlasgow

PDX - GLA

PDXGLA

Portland

Tue 10/14

7:40 am-9:40 am

2 stops18h 00m

Glasgow Intl

Thu 10/23

10:00 am-11:06 pm

2 stops21h 06m

$655

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 $671. 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 $676.

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 $843. The most expensive day to fly to United Kingdom is Saturday, with ticket prices averaging around $1,070.

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 $798. 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 $949. 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 $757 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 25% 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

$244

Fastest flight time

9h 35m

Direct flights

Every day

Airports in United Kingdom

8 airports
The best one-way flight to United Kingdom from Portland in the past 72 hours is $244. The best round-trip flight deal from Portland to United Kingdom found on momondo in the last 72 hours is $461.
The fastest flight from Portland to United Kingdom takes 9h 35m
Direct flights go from Portland to United Kingdom every day.
There are 8 airports near United Kingdom: London City (LCY), London Heathrow (LHR), London Luton (LTN), Edinburgh Turnhouse (EDI), Manchester (MAN), London Stansted (STN), London Gatwick (LGW), Glasgow Intl (GLA)
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  • 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 $491Free CancellationRating
7.0
520 reviews
Search Icelandair flights
KLMPriceFrom $561Free CancellationRating
7.8
1,384 reviews
Search KLM flights
Air CanadaPriceFrom $580Free CancellationRating
7.1
9,855 reviews
Search Air Canada flights
IberiaPriceFrom $581Free CancellationRating
7.0
2,862 reviews
Search Iberia flights
American AirlinesPriceFrom $583Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Virgin AtlanticPriceFrom $599Free CancellationRating
7.4
655 reviews
Search Virgin Atlantic flights
DeltaPriceFrom $600Free CancellationRating
8.0
7,983 reviews
Search Delta flights
British AirwaysPriceFrom $604Free CancellationRating
6.6
7,224 reviews
Search British Airways flights
FinnairPriceFrom $633Free CancellationRating
7.6
1,317 reviews
Search Finnair flights
United AirlinesPriceFrom $642Free CancellationRating
7.4
8,904 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

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.
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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 $310
Flights to Manchesterfrom $372
Flights to Edinburghfrom $405
Flights to Glasgowfrom $417
Flights to Birminghamfrom $384
Flights to Belfastfrom $442
Flights to Newcastle upon Tynefrom $462
Flights to Bristolfrom $465
Flights to Invernessfrom $402
Flights to Liverpoolfrom $475
Flights to Aberdeenfrom $506
Flights to Leedsfrom $473