LON - PWM

£421 Find Cheap Flights from London to Portland – Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to Portland departing on 7/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Portland

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Portland, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Portland, as well as popular online travel agencies
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 27% or moreCompare multiple travel sites with one search.

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Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest return fare
£551
Typical prices: £146-£864
JetBlue
Thu 9/7Mon 13/7
LHR - PWM • 1 stop
Cheapest one-way flight
£421
JetBlue
Mon 7/9
LHR - PWM • 1 stop
Top airlines
Cheapest • from £551 (return)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
Not available
There are currently no direct flights between London and Portland. You’ll need at least 1 connection.
Insights
Insights
Insights
Insights
Top stopover airports
Cheapest • Avg £762 (return)
Shortest trip • 11h 13m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 72% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Portland!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from London to Portland (LON-PWM)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from London to Portland that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from London to Portland

Thu, 9 Jul - Mon, 13 Jul
JetBlue Logo
11:55 - 00:16
LHR
-
PWM
17h 21m
1 stop
JetBlue Logo
06:00 - 09:30
PWM
-
LHR
22h 30m
1 stop
£551JetBlue
Fri, 4 Sep - Fri, 18 Sep
JetBlue Logo
08:15 - 00:25
LHR
-
PWM
21h 10m
1 stop
JetBlue Logo
06:00 - 20:45
PWM
-
LHR
9h 45m
1 stop
£567JetBlue
Fri, 10 Jul - Tue, 14 Jul
JetBlue Logo
11:55 - 13:45
LHR
-
PWM
30h 50m
1 stop
JetBlue Logo
13:25 - 09:30
PWM
-
LHR
15h 05m
1 stop
£577JetBlue
Thu, 9 Jul - Mon, 13 Jul
JetBlue Logo
11:55 - 00:16
LHR
-
PWM
17h 21m
1 stop
JetBlue Logo
06:00 - 09:30
PWM
-
LHR
22h 30m
1 stop
£580JetBlue
Thu, 9 Jul - Mon, 13 Jul
JetBlue Logo
08:15 - 00:16
LHR
-
PWM
21h 01m
1 stop
JetBlue Logo
06:00 - 09:30
PWM
-
LHR
22h 30m
1 stop
£586JetBlue
Sat, 5 Sep - Wed, 9 Sep
JetBlue Logo
11:55 - 00:14
LHR
-
PWM
17h 19m
1 stop
JetBlue Logo
06:00 - 20:45
PWM
-
LHR
9h 45m
1 stop
£598JetBlue
Sat, 5 Sep - Wed, 9 Sep
JetBlue Logo
11:55 - 00:25
LHR
-
PWM
17h 30m
1 stop
JetBlue Logo
06:00 - 20:45
PWM
-
LHR
9h 45m
1 stop
£599JetBlue
Sat, 5 Sep - Wed, 9 Sep
JetBlue Logo
11:55 - 00:25
LHR
-
PWM
17h 30m
1 stop
JetBlue Logo
06:00 - 20:45
PWM
-
LHR
9h 45m
1 stop
£600JetBlue
Fri, 3 Jul - Wed, 8 Jul
JetBlue Logo
11:55 - 00:25
LHR
-
PWM
17h 30m
1 stop
JetBlue Logo
14:40 - 09:30
PWM
-
LHR
13h 50m
1 stop
£604JetBlue
Sat, 4 Jul - Tue, 14 Jul
JetBlue Logo
11:55 - 00:25
LHR
-
PWM
17h 30m
1 stop
JetBlue Logo
13:25 - 09:30
PWM
-
LHR
15h 05m
1 stop
£617JetBlue
Booking Insights

KAYAK’s insights & trends for London to Portland flights

Get data-powered insights and trends into flights from London to Portland to help you find the cheapest flights, the best time to fly and much more.

How much is a return flight from London to Portland, Maine?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from London to Portland, Maine departing in July.

What is the cheapest month to fly from London to Portland?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London to Portland, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from London to Portland is October, where tickets cost £122 (return) on average. On the other hand, the most expensive months are June and January, where the average cost of round-trip tickets is £662 and £606 respectively.

Good to know - Cheap tickets from London to Portland

Low seasonJanuary
Cheapest flight£421
Best time to beat the crowds (14% less expensive on average)
Most popular time to fly (22% more expensive on average)
Flight from London Heathrow Airport to Portland

When to book flights from London to Portland

Are your dates flexible? Find out the best times to travel from London to Portland based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from London to Portland

  • What is the cheapest flight from London to Portland?

    In the last 3 days, the lowest price for a flight from London to Portland was £421 for a one-way ticket and £551 for a return.

  • Which airports will I be using when flying from London to Portland?

    There are 4 airports in London (London Gatwick, London Heathrow, London Luton, and London Stansted.) and only 1 airport in Portland (Portland). The cheapest flights are generally found on the London Heathrow Airport to Portland flight route.

  • Which aircraft models fly most regularly from London to Portland?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from London to Portland?

    Star Alliance is the only airline alliance operating flights between London and Portland.

  • Which is the best airline for flights from London to Portland, United Airlines or JetBlue?

    The two airlines most popular with KAYAK users for flights from London to Portland are United Airlines and JetBlue. With an average price for the route of £744 and an overall rating of 7.4, United Airlines is the most popular choice. JetBlue is also a great choice for the route, with an average price of £646 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from London to Portland?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to Portland.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to Portland?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Portland from London is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London to Portland?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Portland with an airline and back to London with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to Portland?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Portland from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from London to Portland

 
See real verified KAYAK customer reviews for airlines flying from London to Portland. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from London to Portland? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9879 reviews
8.1Crew
7.1Entertainment
7.7Boarding
7.3Comfort
6.6Food
Airline reviews

Great experience. Boarding was fast, staff were very nice and funny, everything at the seat worked well.

10.0 ExcellentNerissa, Jun 2026
ORD - ANC
Read more United Airlines reviews

Great experience. Boarding was fast, staff were very nice and funny, everything at the seat worked well.

Boarding was great, and the crew were very friendly. The seats must have been a bit on the older side and you could feel some of the seat components through the padding. Also, the plugs did not work on the row's entertainment screen or charging ports. Checked bag was transferred for connecting flight, and we appreciated how early we had the connecting gate information.

Flight attendants were great. Food mediocre. Bamboo utensils not Great especially if you have to cut something. Seating a bit crowded.

Lost one piece of luggage even though I checked in 2.5 hours before the flight

The crew was the worst ive ever had in my life flying with United Airlines, letting another person move my bag without asking and then the staff saying would the floor be better after I kept begging saying dont move my bag it has fragile things inside. This incident truly makes me they favor other customers more and I dont want to worry about being on the tail end. Especially if they dont listen any input, no care for what I asked but accommodated those who are reckless and disturb others more...

For the expense of first class, the seats could have been nicer and higher tier snacks would have been nice.

The boarding process on the departure from LA was rather slow even though I was in Group 1. For first class, I was not expecting to have to pay for Wi-fi but I did and then the wi-fi was spotty. The entree was surprisingly good and so that was a pleasant surprise. However, once I got to Houston, it was terrible. Unfortunately there was bad weather but the constant gate changes for my connecting flight was difficult to manage due to having to navigate back and forth between different terminals.

United has been holding my money for a cancel on another ticket they wouldn’t let me fly for going on 5 months. Terrible service I wouldn’t choose to buy tickets or fly with united again. Very bad experience generally dishonorable and poor service .

The seats were very nice in premium economy. The service was good. The flight was slightly bumpy. Would have appreciated more updates from the pilots.

They delayed the flight 3 hours because it wasn't full they moved us to 5 different gates probably the worst airline ever not even spirit is this bad.

The flight was delayed 14 hours and communication was very poor. No one seemed to know what was happening and the gate agent was trying to help people for several flights. She was by herself trying to help 100s of people.

Domestic flights are good. Just stay away from international travel

Every time I leave from sti Dominican Republic, there is always a delay with a flight , causing a rush to make it to the next flight considering you have to go threw immigration

Flight left 2 hours late with no explanation as to the delay

I will NEVER fly with this clown show airline again. Idiots. All of them. Unprepared. Unfriendly. Miserable employees. NEVER. EVER. AGAIN

For whatever reason, I could not check in online. Kept getting the "It's not you it's us" message. Even when we tried the kiosk at the airport - same results. The check-in person had a very difficult time getting our boarding passes together despite the fact that we could show confirmation on the jetblue website. After a very long time we finally got boarding passes. The only other issue is, my vegetarian meal featured chicken.

The aircraft was fine, it’s was just the service. The flight got canceled several times and that was very inconvenient for my 69 years old mom.

My checked in luggage cost was $59, almost ticket price. The first 13 rows were empty, but fly attendant did not alow women with little boy change her middle sit, sweet boy was crying, I am so sorry for mother and passengers. At the end of the flight the cabin became impossible cold. Only good was timing of departure and early landing, but it suppose to be normal.

I tried to book a flight with Jet Blue. Your third party company hijacked my attempt with a website that looked like I was booking with Jet Blue. I realized it when I paid. I tried to cancel and was told by a man in India that there were no refunds. $735 stolen, Thanks Kayak!

It was inexplicably canceled and we are stuck in LA, haven't gotten home and it has been an inconvenience having lost work (on unpaid leave for my husband).

Everything you need to know for your flight from London to Portland

Information on your arrival and departure airports