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Cheap flights from the United Kingdom to Portland, Maine from £453

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
2 Jun — 9 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from United Kingdom to Portland

Enter your travel dates to find the best prices.

Cheapest flights from United Kingdom to Portland
Explore the most affordable flight options available from United Kingdom to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 May 2026.

Wed 27/508:15
LHR
-
PWM
1 stop20h 43m
JetBlue
Wed 3/614:37
PWM
-
LHR
1 stop25h 08m
JetBlue
Deal found 29/4£539
Sat 20/608:15
LHR
-
PWM
1 stop21h 10m
JetBlue
Mon 6/706:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 2/5£624
Fri 5/608:15
LHR
-
PWM
1 stop20h 43m
JetBlue
Sat 13/614:30
PWM
-
LHR
1 stop14h 00m
JetBlue
Deal found 1/5£634
Wed 13/511:55
LHR
-
PWM
1 stop16h 08m
JetBlue
Mon 18/507:20
PWM
-
LHR
1 stop21h 10m
JetBlue
Deal found 3/5£645
Wed 17/608:15
LHR
-
PWM
1 stop21h 10m
JetBlue
Mon 22/606:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 30/4£650
Wed 27/507:05
LHR
-
PWM
2 stops22h 38m
Scandinavian Airlines
Wed 3/606:25
PWM
-
LHR
2 stops34h 10m
Scandinavian Airlines
Deal found 29/4£659
Mon 18/508:15
LHR
-
PWM
1 stop19h 48m
JetBlue
Mon 25/506:00
PWM
-
LHR
1 stop22h 30m
JetBlue
Deal found 30/4£662
Fri 29/508:40
LHR
-
PWM
2 stops20h 18m
JetBlue
Thu 4/606:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 1/5£681
Fri 29/507:05
LHR
-
PWM
2 stops22h 38m
Scandinavian Airlines
Thu 4/606:25
PWM
-
LHR
2 stops22h 10m
Scandinavian Airlines
Deal found 1/5£683
Thu 5/1107:30
LHR
-
PWM
2 stops15h 43m
United Airlines
Mon 9/1109:10
PWM
-
LHR
1 stop19h 00m
United Airlines
Deal found 29/4£694
Thu 28/521:10
MAN
-
PWM
2 stops32h 33m
Scandinavian Airlines
Thu 4/606:25
PWM
-
MAN
2 stops24h 40m
Scandinavian Airlines
Deal found 30/4£701
Wed 23/911:30
EDI
-
PWM
1 stop15h 31m
United Airlines
Sun 27/919:25
PWM
-
EDI
2 stops31h 40m
United Airlines
Deal found 29/4£767

Find flight deals from United Kingdom to Portland

Keep the following information in mind while searching for United Kingdom to Portland flight deals. Data was last updated 3 May 2026.

Round-trip from

£539

One-way from

£453

Popular in

August

Cheapest in

October

Average price

£598
JetBlue
  • JetBlue
  • 27/5-3/6
  • 2 total stops
  • 45h 51m total
  • United Kingdom to Portland
Search Deals
4/6
  • 4/6
  • 3 total stops
  • 55h 57m total
  • United Kingdom to Portland
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£72 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from United Kingdom to Portland 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, Cheapflights users made 858,174 searches. Data last updated 3 May 2026.
Use the filters below to find and compare flights from the United Kingdom to Portland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 13/5

11:55-23:03

1 stop16h 08m

Portland

Mon 18/5

07:20-09:30

1 stop21h 10m

£645

ManchesterPortland

MAN - PWM

MANPWM

Manchester

Thu 28/5

21:10-00:43

2 stops32h 33m

Portland

Thu 4/6

06:25-12:05

2 stops24h 40m

£701

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 26/5

07:05-00:43

2 stops22h 38m

Portland

Tue 2/6

14:38-14:35

3 stops18h 57m

£751
Fastest return journey

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 26/5

11:55-23:58

1 stop17h 03m

Portland

Tue 2/6

06:00-20:45

1 stop9h 45m

£764

EdinburghPortland

EDI - PWM

EDIPWM

Edinburgh Turnhouse

Wed 23/9

11:30-22:01

1 stop15h 31m

Portland

Sun 27/9

19:25-08:05

2 stops31h 40m

£767

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 17/6

08:40-00:52

2 stops21h 12m

Portland

Mon 22/6

12:40-07:10

1 stop13h 30m

£770

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 1/6

08:40-00:43

2 stops21h 03m

Portland

Wed 10/6

18:57-13:15

1 stop13h 18m

£770

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 27/5

11:45-00:43

2 stops17h 58m

Portland

Wed 3/6

14:38-06:20

1 stop10h 42m

£770

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 26/5

06:30-00:43

2 stops23h 13m

Portland

Tue 2/6

14:38-06:20

1 stop10h 42m

£772

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 29/5

11:55-23:58

1 stop17h 03m

Portland

Fri 5/6

06:00-20:45

1 stop9h 45m

£795

Flights are sorted by cheapest return flights first.

Deals found on 29/4

Showing 1-10 of 40 resultsSorted by cheapest first
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Best time to book a flight from United Kingdom to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from United Kingdom with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from the United Kingdom to Portland

What is the cheapest month to book a flight from United Kingdom to Portland, Maine?

Currently, October is the cheapest month in which you can book a flight from United Kingdom to Portland, Maine (average of £119). Flying from United Kingdom to Portland, Maine in January is currently the most expensive (average of £591). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Portland

Get insights into the airlines that provide service to Portland. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portland. Reviews last updated 3 May 2026.
Get a feel of what it's like to fly with KLM,United Airlines, andVirgin Atlantic from the United Kingdom to Portland by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,509 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Crew

8.4

Overall

7.8

Food

7.3

Boarding

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,509 reviews
KLM
7.8
Good
1,509 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Crew

8.4

Overall

7.8

Food

7.3

Boarding

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
United Airlines
7.4
Good
9,683 reviews
KLM
7.8
Good
1,509 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Crew

8.4

Overall

7.8

Food

7.3

Boarding

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Virgin Atlantic
7.4
Good
688 reviews
KLM
7.8
Good
1,509 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Crew

8.4

Overall

7.8

Food

7.3

Boarding

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
JetBlue
7.1
Good
2,968 reviews
KLM
7.8
Good
1,509 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Crew

8.4

Overall

7.8

Food

7.3

Boarding

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

Related info for your journey

Find useful and relevant information for your journey from United Kingdom to Portland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Portland from United Kingdom?

    If you book a flight to Portland from United Kingdom, you will be flying to Portland, which is the city’s only airport. Portland (PWM) is located 2.9 mi from the center of Portland.

  • How long is the flight from United Kingdom to Portland, Maine?

    Airlines like JetBlue, Scandinavian Airlines, and United Airlines fly from United Kingdom to Portland, Maine in about 15h 31m. The time it takes to get you to your destination can typically vary by up to 17h 02m. The distance between United Kingdom and Portland, Maine is about 2973 mi. This flight may include one or multiple stops.

  • What are the most popular routes from United Kingdom to Portland, Maine?

    While some choose either Edinburgh Turnhouse - Portland or Manchester - Portland, London Heathrow - Portland is the most popular route from United Kingdom to Portland, Maine.

  • Can I find deals for flights from United Kingdom to Portland that include hotel bookings?

    Yes. In addition to deals on United Kingdom to Portland flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from United Kingdom to Portland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from United Kingdom to Portland.

  • Can I find deals for business class flights from United Kingdom to Portland?

    Yes. Cheapflights offers flight deals from United Kingdom to Portland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from United Kingdom to Portland, Maine?

    Currently, October is the cheapest month in which you can book a flight from United Kingdom to Portland, Maine (average of £119). Flying from United Kingdom to Portland, Maine in January is currently the most expensive (average of £591). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 3 airlines flying from United Kingdom to Portland

Discover the top 3 airlines that operate flights from United Kingdom to Portland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 3 May 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£537Average£734FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£559Average£721FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£567Average£630FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from United Kingdom to Portland?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from United Kingdom to Portland. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from United Kingdom to Portland?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from United Kingdom to Portland.

Can Cheapflights find flights from United Kingdom to Portland with no change fees?

Yes! Cheapflights helps users easily find flights from United Kingdom to Portland with no change fees.

Can Cheapflights notify me if prices for flights from United Kingdom to Portland become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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