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Cheap flights from Portland, Maine to the United Kingdom from $316

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 5/15. 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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Cheap round-trip flights

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Multiple Airlines Logo
9:47 am - 10:00 am
PWM
-
LGW
19h 13m1 stop
Multiple Airlines Logo
2:00 pm - 9:07 am
LGW
-
PWM
24h 07m1 stop
$523Multiple Airlines
lun., ene. 19 - jue., ene. 29
Multiple Airlines Logo
9:47 am - 10:00 am
PWM
-
LGW
19h 13m1 stop
Multiple Airlines Logo
2:00 pm - 4:26 pm
LGW
-
PWM
31h 26m2 stops
$544Multiple Airlines
lun., ene. 19 - jue., ene. 29
Delta Logo
2:35 pm - 6:55 am
PWM
-
LHR
11h 20m1 stop
Delta Logo
8:55 am - 12:26 am
LHR
-
PWM
20h 31m2 stops
$598Delta
mié., ene. 7 - mar., ene. 13
Scandinavian Airlines Logo
2:35 pm - 9:40 pm
PWM
-
LHR
26h 05m2 stops
Scandinavian Airlines Logo
6:40 am - 12:20 am
LHR
-
PWM
22h 40m2 stops
$599Scandinavian Airlines
jue., ene. 22 - mar., ene. 27
Scandinavian Airlines Logo
2:35 pm - 4:00 pm
PWM
-
LHR
20h 25m2 stops
Scandinavian Airlines Logo
6:40 am - 12:18 am
LHR
-
PWM
22h 38m2 stops
$600Scandinavian Airlines
jue., feb. 5 - jue., feb. 12
Delta Logo
12:20 pm - 8:45 am
PWM
-
LHR
15h 25m1 stop
Delta Logo
11:45 am - 12:20 am
LHR
-
PWM
17h 35m2 stops
$602Delta
mié., ene. 21 - lun., ene. 26
United Airlines Logo
3:12 pm - 7:55 am
PWM
-
EDI
11h 43m1 stop
United Airlines Logo
9:25 am - 6:52 pm
EDI
-
PWM
14h 27m2 stops
$717United Airlines
vie., feb. 6 - mar., feb. 10
United Airlines Logo
3:12 pm - 10:20 am
PWM
-
MAN
14h 08m2 stops
United Airlines Logo
9:30 am - 2:39 pm
MAN
-
PWM
58h 09m2 stops
$781United Airlines
jue., ene. 29 - lun., feb. 2
JetBlue Logo
6:00 am - 9:29 am
PWM
-
EDI
22h 29m1 stop
JetBlue Logo
11:30 am - 11:36 pm
EDI
-
PWM
17h 06m1 stop
$1,002JetBlue
dom., may. 3 - jue., may. 7
JetBlue Logo
2:18 pm - 9:29 am
PWM
-
EDI
14h 11m1 stop
JetBlue Logo
11:30 am - 11:36 pm
EDI
-
PWM
17h 06m1 stop
$1,075JetBlue
mar., may. 26 - vie., jun. 19

Delta flights from Portland, Maine to United Kingdom

Our best Delta deals on Portland, Maine to United Kingdom flight tickets
Delta
Jan 7
PWM2:35 pmPortland
11h 20m
1 stop
LHR6:55 amLondon Heathrow
Jan 13
LHR8:55 amLondon Heathrow
20h 31m
2 stops
PWM12:26 amPortland
$598
Find similar
Delta
Jan 21
PWM12:20 pmPortland
15h 25m
1 stop
LHR8:45 amLondon Heathrow
Jan 26
LHR11:45 amLondon Heathrow
17h 35m
2 stops
PWM12:20 amPortland
$602
Find similar
Delta
Jan 5
PWM6:00 amPortland
23h 15m
1 stop
LHR10:15 amLondon Heathrow
Jan 15
LHR12:40 pmLondon Heathrow
15h 42m
1 stop
PWM11:22 pmPortland
$605
Find similar

Scandinavian Airlines flights from Portland, Maine to United Kingdom

Our best Scandinavian Airlines deals on Portland, Maine to United Kingdom flight tickets
Scandinavian Airlines
Jan 22
PWM2:35 pmPortland
26h 05m
2 stops
LHR9:40 pmLondon Heathrow
Jan 27
LHR6:40 amLondon Heathrow
22h 40m
2 stops
PWM12:20 amPortland
$599
Find similar
Scandinavian Airlines
Feb 5
PWM2:35 pmPortland
20h 25m
2 stops
LHR4:00 pmLondon Heathrow
Feb 12
LHR6:40 amLondon Heathrow
22h 38m
2 stops
PWM12:18 amPortland
$600
Find similar
Scandinavian Airlines
Feb 5
PWM2:35 pmPortland
20h 50m
3 stops
LHR4:25 pmLondon Heathrow
Feb 9
LHR6:40 amLondon Heathrow
22h 40m
2 stops
PWM12:20 amPortland
$603
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated diciembre 4, 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

lun. 1/19

9:47 am-10:00 am

1 stop19h 13m

London Gatwick

jue. 1/29

2:00 pm-9:07 am

1 stop24h 07m

$523

PortlandLondon

PWM - LGW

PWMLGW

Portland

lun. 1/19

9:47 am-10:00 am

1 stop19h 13m

London Gatwick

jue. 1/29

2:00 pm-4:26 pm

2 stops31h 26m

$544

PortlandLondon

PWM - LHR

PWMLHR

Portland

mié. 1/7

2:35 pm-6:55 am

1 stop11h 20m

London Heathrow

mar. 1/13

8:55 am-12:26 am

2 stops20h 31m

$598

PortlandLondon

PWM - LHR

PWMLHR

Portland

jue. 1/22

2:35 pm-9:40 pm

2 stops26h 05m

London Heathrow

mar. 1/27

6:40 am-12:20 am

2 stops22h 40m

$599

PortlandLondon

PWM - LHR

PWMLHR

Portland

jue. 2/5

2:35 pm-4:00 pm

2 stops20h 25m

London Heathrow

jue. 2/12

6:40 am-12:18 am

2 stops22h 38m

$600

PortlandLondon

PWM - LHR

PWMLHR

Portland

mié. 1/21

12:20 pm-8:45 am

1 stop15h 25m

London Heathrow

lun. 1/26

11:45 am-12:20 am

2 stops17h 35m

$602

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

vie. 2/6

3:12 pm-7:55 am

1 stop11h 43m

Edinburgh Turnhouse

mar. 2/10

9:25 am-6:52 pm

2 stops14h 27m

$717

PortlandManchester

PWM - MAN

PWMMAN

Portland

jue. 1/29

3:12 pm-10:20 am

2 stops14h 08m

Manchester

lun. 2/2

9:30 am-2:39 pm

2 stops58h 09m

$781

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

dom. 5/3

6:00 am-9:29 am

1 stop22h 29m

Edinburgh Turnhouse

jue. 5/7

11:30 am-11:36 pm

1 stop17h 06m

$1,002

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

mar. 5/26

2:18 pm-9:29 am

1 stop14h 11m

Edinburgh Turnhouse

vie. 6/19

11:30 am-11:36 pm

1 stop17h 06m

$1,075

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, 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?

In general, October is the cheapest month to fly from Portland, Maine to United Kingdom. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $619. If you aren’t able to travel to United Kingdom during the month of October, then flying in December is also cheap. Prices for this month can be found on momondo for an average of $699.

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

The cheapest day to depart from Portland, Maine to United Kingdom is on a Tuesday when prices can be found for as low as $788. The most expensive day to fly to United Kingdom is Friday, with ticket prices averaging around $936.

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 at noon. momondo users have found flights departing from Portland, Maine to United Kingdom at noon for as low as $827. 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 afternoon, with an average ticket price of $869. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on Portland, Maine to United Kingdom flights?

You could potentially save up to 8% on your flight if you consider stops on a Portland, Maine to United Kingdom flight.

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

11h 20m

Direct flights

None
The fastest flight from Portland, Maine to United Kingdom takes 11h 20m
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 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.

Best airlines flying from Portland, Maine to United Kingdom

Compare and see reviews for airlines that fly from Portland, Maine to United Kingdom with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $648Free CancellationRating
7.4
9,066 reviews
Search United Airlines flights
DeltaPriceFrom $683Free CancellationRating
7.9
8,011 reviews
Search Delta flights
JetBluePriceFrom $695Free CancellationRating
7.2
2,898 reviews
Search JetBlue flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Portland to United Kingdom. momondo saves you time and could save you money on your trip.

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

Yes. momondo enables you to select and highlight flights to United Kingdom from Portland with this policy.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to United Kingdom from Portland.

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.

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Find better results for your trip to the United Kingdom

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Popular flights according to clicks in the last 7 days on momondo
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