Latest deals
Insights
FAQs
Price Alerts

Cheap flights from Portland, Maine to the United Kingdom from £237

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, Maine to the United Kingdom departing on 15/5. 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
Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Portland, Maine to the United Kingdom

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
09:47 - 10:00
PWM
-
LGW
19h 13m1 stop
Multiple Airlines Logo
14:00 - 09:07
LGW
-
PWM
24h 07m1 stop
£392Multiple Airlines
Mo, 19 Jan - Do, 29 Jan
Multiple Airlines Logo
09:47 - 10:00
PWM
-
LGW
19h 13m1 stop
Multiple Airlines Logo
14:00 - 16:26
LGW
-
PWM
31h 26m2 stops
£408Multiple Airlines
Mo, 19 Jan - Do, 29 Jan
Multiple Airlines Logo
11:29 - 10:05
PWM
-
LGW
41h 36m2 stops
Multiple Airlines Logo
14:00 - 09:07
LGW
-
PWM
24h 07m1 stop
£425Multiple Airlines
Fr, 23 Jan - Do, 29 Jan
Delta Logo
14:35 - 06:55
PWM
-
LHR
11h 20m1 stop
Delta Logo
08:55 - 00:26
LHR
-
PWM
20h 31m2 stops
£448Delta
Mi, 7 Jan - Di, 13 Jan
Scandinavian Airlines Logo
14:35 - 21:40
PWM
-
LHR
26h 05m2 stops
Scandinavian Airlines Logo
06:40 - 00:20
LHR
-
PWM
22h 40m2 stops
£449Scandinavian Airlines
Do, 22 Jan - Di, 27 Jan
Scandinavian Airlines Logo
06:16 - 09:20
PWM
-
LHR
22h 04m2 stops
Scandinavian Airlines Logo
06:40 - 00:20
LHR
-
PWM
22h 40m2 stops
£450Scandinavian Airlines
Do, 5 Feb - Mo, 9 Feb
Delta Logo
12:20 - 08:45
PWM
-
LHR
15h 25m1 stop
Delta Logo
11:45 - 00:20
LHR
-
PWM
17h 35m2 stops
£451Delta
Mi, 21 Jan - Mo, 26 Jan
Virgin Atlantic Logo
05:30 - 21:35
PWM
-
EDI
35h 05m2 stops
Virgin Atlantic Logo
11:00 - 22:27
EDI
-
PWM
40h 27m2 stops
£472Virgin Atlantic
Fr, 6 Feb - Di, 10 Feb
American Airlines Logo
15:58 - 12:50
PWM
-
GLA
15h 52m2 stops
American Airlines Logo
06:25 - 22:54
GLA
-
PWM
21h 29m2 stops
£507American Airlines
Mi, 28 Jan - Di, 10 Feb
American Airlines Logo
15:58 - 12:50
PWM
-
GLA
15h 52m2 stops
American Airlines Logo
09:50 - 22:54
GLA
-
PWM
18h 04m3 stops
£511American Airlines
Mi, 28 Jan - Di, 10 Feb

United Airlines flights from Portland, Maine to United Kingdom

Our best United Airlines deals on Portland, Maine to United Kingdom flight tickets
United Airlines
31 Dec
PWM19:01Portland
10h 24m
1 stop
LHR10:25London Heathrow
7 Jan
LHR13:25London Heathrow
34h 25m
2 stops
PWM18:50Portland
£514
Find similar
United Airlines
23 Jan
PWM14:31Portland
11h 09m
1 stop
LHR06:40London Heathrow
27 Jan
LHR06:35London Heathrow
17h 17m
2 stops
PWM18:52Portland
£532
Find similar
United Airlines
6 Feb
PWM15:12Portland
11h 43m
1 stop
EDI07:55Edinburgh Turnhouse
10 Feb
EDI09:25Edinburgh Turnhouse
14h 27m
2 stops
PWM18:52Portland
£537
Find similar

Austrian Airlines flights from Portland, Maine to United Kingdom

Our best Austrian Airlines deals on Portland, Maine to United Kingdom flight tickets
Austrian Airlines
22 May
PWM11:17Portland
14h 58m
1 stop
LHR07:15London Heathrow
31 May
LHR19:30London Heathrow
27h 43m
2 stops
PWM18:13Portland
£869
Find similar
Austrian Airlines
7 Dec
PWM10:35Portland
17h 35m
1 stop
LHR09:10London Heathrow
14 Dec
LHR08:00London Heathrow
15h 42m
1 stop
PWM18:42Portland
£904
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Portland, Maine 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 279,928 searches. Data last updated 5 Dezember 2025.
Use the filters below to find and compare flights from Portland, Maine to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PWM - LGW

PWMLGW

Portland

Mo 19/1

09:47-10:00

1 stop19h 13m

London Gatwick

Do 29/1

14:00-09:07

1 stop24h 07m

£392

PortlandLondon

PWM - LGW

PWMLGW

Portland

Mo 19/1

09:47-10:00

1 stop19h 13m

London Gatwick

Do 29/1

14:00-16:26

2 stops31h 26m

£408

PortlandLondon

PWM - LGW

PWMLGW

Portland

Fr 23/1

11:29-10:05

2 stops41h 36m

London Gatwick

Do 29/1

14:00-09:07

1 stop24h 07m

£425

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mi 7/1

14:35-06:55

1 stop11h 20m

London Heathrow

Di 13/1

08:55-00:26

2 stops20h 31m

£448

PortlandLondon

PWM - LHR

PWMLHR

Portland

Do 22/1

14:35-21:40

2 stops26h 05m

London Heathrow

Di 27/1

06:40-00:20

2 stops22h 40m

£449

PortlandLondon

PWM - LHR

PWMLHR

Portland

Do 5/2

06:16-09:20

2 stops22h 04m

London Heathrow

Mo 9/2

06:40-00:20

2 stops22h 40m

£450

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mi 21/1

12:20-08:45

1 stop15h 25m

London Heathrow

Mo 26/1

11:45-00:20

2 stops17h 35m

£451

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Fr 6/2

05:30-21:35

2 stops35h 05m

Edinburgh Turnhouse

Di 10/2

11:00-22:27

2 stops40h 27m

£472

PortlandGlasgow

PWM - GLA

PWMGLA

Portland

Mi 28/1

15:58-12:50

2 stops15h 52m

Glasgow Intl

Di 10/2

06:25-22:54

2 stops21h 29m

£507

PortlandGlasgow

PWM - GLA

PWMGLA

Portland

Mi 28/1

15:58-12:50

2 stops15h 52m

Glasgow Intl

Di 10/2

09:50-22:54

3 stops18h 04m

£511

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to the United Kingdom from

How to get the cheapest flight ticket from Portland, Maine 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?

The cheapest month to fly to United Kingdom from Portland, Maine is in October. Flight prices, which tend to average around £464, are often lower during this time because this is during the off-season. If you are unable to visit United Kingdom during the month of October, then departing from Portland, Maine during the month December is also very affordable. Most momondo users find prices during this month for around £524.

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

The cheapest time of day to fly to United Kingdom is at midday when flights can be purchased for as low as £530. Try not to purchase tickets in the morning because they tend to be around £560. Of course, these prices can vary depending on the time of year and what airport you fly to.

Cheap Portland, Maine to United Kingdom flight deals and tips

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

Fastest flight time

10h 50m

Direct flights

None
The fastest flight from Portland, Maine to United Kingdom takes 10h 50m
There are no direct flights from Portland, Maine to United Kingdom. There are no popular flight routes from Portland, Maine to United Kingdom.
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 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 travel and health documents required for your trip to United Kingdom can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at United Kingdom. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Portland to United Kingdom . Millions of users trust and use momondo every year so you are in good hands.

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?

Once you have performed a search for Portland to United Kingdom flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are simply researching potential flights to United Kingdom, momondo offers a useful price alert feature which will track prices for flights to United Kingdom from Portland and alert you when they change.

An easier way to manage your United Kingdom trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
So 4/1
So 11/1
By creating a price alert you accept our terms of use and privacy policy.

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 £30
Flights to Manchesterfrom £28
Flights to Birminghamfrom £30
Flights to Edinburghfrom £29
Flights to Belfastfrom £28
Flights to Glasgowfrom £26
Flights to Bristolfrom £26
Flights to Newcastle upon Tynefrom £30
Flights to Aberdeenfrom £37
Flights to Liverpoolfrom £28
Flights to Leedsfrom £48
Flights to Invernessfrom £31