Find flights
When to book
Airlines
FAQs

Cheap flights from the United Kingdom to Portland, Maine from £421

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 18/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
30 Jun — 7 Jul1
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 31 May 2026.

Wed 8/708:15
LHR
-
PWM
1 stop21h 01m
JetBlue
Mon 13/714:40
PWM
-
LHR
1 stop13h 50m
JetBlue
Deal found 28/5£571
Thu 25/608:15
LHR
-
PWM
1 stop21h 10m
JetBlue
Thu 2/706:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 28/5£601
Sat 12/911:55
LHR
-
PWM
1 stop16h 57m
JetBlue
Wed 16/906:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 28/5£625
Fri 10/708:15
LHR
-
PWM
1 stop21h 01m
JetBlue
Wed 29/714:40
PWM
-
LHR
1 stop13h 50m
JetBlue
Deal found 28/5£680
Sat 12/910:50
LHR
-
PWM
2 stops18h 09m
United Airlines
Wed 16/906:00
PWM
-
LHR
1 stop10h 25m
United Airlines
Deal found 28/5£695
Wed 9/919:10
EDI
-
PWM
2 stops33h 49m
Scandinavian Airlines
Sun 13/906:30
PWM
-
EDI
2 stops30h 55m
Scandinavian Airlines
Deal found 29/5£739
Wed 9/909:40
EDI
-
PWM
2 stops14h 44m
United Airlines
Sun 13/918:53
PWM
-
EDI
1 stop32h 12m
United Airlines
Deal found 28/5£770
Tue 14/711:20
EDI
-
PWM
2 stops16h 54m
Virgin Atlantic
Tue 21/706:00
PWM
-
EDI
2 stops20h 05m
Virgin Atlantic
Deal found 30/5£903
Mon 13/710:35
MAN
-
PWM
2 stops18h 16m
United Airlines
Mon 20/714:20
PWM
-
MAN
2 stops14h 30m
United Airlines
Deal found 29/5£907
Sun 12/709:00
MAN
-
PWM
2 stops19h 51m
United Airlines
Sun 19/720:15
PWM
-
MAN
2 stops39h 55m
United Airlines
Deal found 28/5£942
Tue 14/714:05
EDI
-
PWM
1 stop15h 54m
Delta
Tue 21/713:55
PWM
-
EDI
1 stop16h 55m
Delta
Deal found 30/5£943
Sat 11/706:05
MAN
-
PWM
2 stops22h 46m
United Airlines
Sat 18/710:55
PWM
-
MAN
2 stops17h 55m
United Airlines
Deal found 27/5£972

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 31 May 2026.

Round-trip from

£571

One-way from

£421

Popular in

August

Cheapest in

February

Average price

£636
JetBlue
  • JetBlue
  • 8/7-13/7
  • 2 total stops
  • 34h 51m total
  • United Kingdom to Portland
Search Deals
18/6
  • 18/6
  • 2 total stops
  • 40h 47m total
  • United Kingdom to Portland
Search Deals
Highest demand for flights based on searches. 12% 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 31 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 8/7

08:15-00:16

1 stop21h 01m

Portland

Mon 13/7

14:40-09:30

1 stop13h 50m

£622
Fastest return journey

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 12/9

11:55-23:52

1 stop16h 57m

Portland

Wed 16/9

06:00-20:45

1 stop9h 45m

£628

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 13/11

07:30-18:13

2 stops15h 43m

Portland

Mon 16/11

17:06-09:10

1 stop11h 04m

£699

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 12/9

06:40-23:59

2 stops22h 19m

Portland

Wed 16/9

06:02-17:40

2 stops30h 38m

£735

EdinburghPortland

EDI - PWM

EDIPWM

Edinburgh Turnhouse

Wed 9/9

19:10-23:59

2 stops33h 49m

Portland

Sun 13/9

06:30-18:25

2 stops30h 55m

£739

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sun 12/7

11:55-00:16

1 stop17h 21m

Portland

Sun 19/7

06:00-20:45

1 stop9h 45m

£752

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 10/7

08:00-00:16

2 stops21h 16m

Portland

Wed 29/7

14:59-08:50

1 stop12h 51m

£758

EdinburghPortland

EDI - PWM

EDIPWM

Edinburgh Turnhouse

Wed 9/9

09:40-10:04

2 stops29h 24m

Portland

Sun 13/9

18:53-10:35

2 stops34h 42m

£770

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 8/7

08:00-00:16

2 stops21h 16m

Portland

Mon 13/7

14:40-18:50

2 stops23h 10m

£773

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 8/7

11:45-00:59

2 stops18h 14m

Portland

Mon 13/7

14:59-12:10

1 stop16h 11m

£777

Flights are sorted by cheapest return flights first.

Deals found on 31/5

Showing 1-10 of 38 resultsSorted by cheapest first
1
2
3
4

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 £120). Flying from United Kingdom to Portland, Maine in June is currently the most expensive (average of £651). 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 31 May 2026.
Get a feel of what it's like to fly with KLM,Virgin Atlantic, andUnited Airlines 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
1,524 reviews
Check prices

Comfort

7.7

Crew

8.4

Boarding

7.8

Food

7.3

Entertainment

7.2

Overall

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
1,524 reviews
KLM
7.8
Good
1,524 reviews
Check prices

Comfort

7.7

Crew

8.4

Boarding

7.8

Food

7.3

Entertainment

7.2

Overall

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
7.5
Good
689 reviews
KLM
7.8
Good
1,524 reviews
Check prices

Comfort

7.7

Crew

8.4

Boarding

7.8

Food

7.3

Entertainment

7.2

Overall

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
9,769 reviews
KLM
7.8
Good
1,524 reviews
Check prices

Comfort

7.7

Crew

8.4

Boarding

7.8

Food

7.3

Entertainment

7.2

Overall

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
2,985 reviews
KLM
7.8
Good
1,524 reviews
Check prices

Comfort

7.7

Crew

8.4

Boarding

7.8

Food

7.3

Entertainment

7.2

Overall

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, United Airlines, and Scandinavian Airlines fly from United Kingdom to Portland, Maine in about 15h 43m. The time it takes to get you to your destination can typically vary by up to 6h 36m. The distance between United Kingdom and Portland, Maine is about 3173 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 Manchester - Portland or Edinburgh Turnhouse - 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 £120). Flying from United Kingdom to Portland, Maine in June is currently the most expensive (average of £651). 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 31 May 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£542Average£735FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£564Average£746FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£609Average£656FlexibilityNo 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!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.