£342 Find Cheap Flights from London to Maine

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 Maine departing on 7/5. 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 Maine

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Maine, 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 Maine, as well as popular online travel agencies
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Cheap Flights from London to Maine

Cheapest return prices found by our users on KAYAK in the last 72 hours
Portland
Portland1 stop£491
Bangor
Bangor2 stops£756
Portland
Portland1 stop£491
Bangor
Bangor2 stops£756

Book Cheap London to Maine Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from London to Maine 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 Maine

Tue, 4 Aug - Thu, 27 Aug
British Airways Logo
17:35 - 20:05
LHR
-
BOS
7h 30mdirect
British Airways Logo
21:50 - 09:35
BOS
-
LHR
6h 45mdirect
£399British Airways
Wed, 5 Aug - Wed, 26 Aug
British Airways Logo
20:10 - 22:35
LHR
-
BOS
7h 25mdirect
British Airways Logo
21:50 - 09:35
BOS
-
LHR
6h 45mdirect
£400British Airways
Sat, 9 May - Fri, 22 May
Delta Logo
11:45 - 19:03
LHR
-
BOS
12h 18m
1 stop
Delta Logo
19:00 - 06:45
BOS
-
LHR
6h 45mdirect
£401Delta
Fri, 15 May - Mon, 25 May
British Airways Logo
14:30 - 16:55
LHR
-
BOS
7h 25mdirect
British Airways Logo
21:50 - 09:35
BOS
-
LHR
6h 45mdirect
£402British Airways
Tue, 12 May - Mon, 18 May
Delta Logo
16:20 - 23:37
LHR
-
BOS
12h 17m
1 stop
Delta Logo
19:00 - 06:45
BOS
-
LHR
6h 45mdirect
£404Delta
Thu, 14 May - Fri, 22 May
JetBlue Logo
11:55 - 23:03
LHR
-
PWM
16h 08m
1 stop
JetBlue Logo
06:00 - 20:45
PWM
-
LHR
9h 45m
1 stop
£491JetBlue
Thu, 4 Jun - Fri, 5 Jun
JetBlue Logo
08:15 - 23:58
LHR
-
PWM
20h 43m
1 stop
JetBlue Logo
14:37 - 09:30
PWM
-
LHR
13h 53m
1 stop
£590JetBlue
Mon, 11 May - Mon, 18 May
United Airlines Logo
13:50 - 23:29
LHR
-
PWM
14h 39m
2 stops
United Airlines Logo
15:39 - 10:40
PWM
-
LHR
14h 01m
2 stops
£665United Airlines
Tue, 1 Sep - Sun, 20 Sep
United Airlines Logo
07:30 - 18:54
LHR
-
PWM
16h 24m
2 stops
United Airlines Logo
19:35 - 06:55
PWM
-
LHR
30h 20m
1 stop
£670United Airlines
Fri, 1 May - Tue, 5 May
Finnair Logo
13:45 - 21:45
LHR
-
BGR
13h 00m
1 stop
Finnair Logo
07:08 - 09:40
BGR
-
LHR
21h 32m
2 stops
£792Finnair
Booking Insights

KAYAK's insights & trends for London to Maine flights

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

How much is a return flight from London to 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 Maine departing in May.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London to Maine, 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 Maine is October, when tickets cost £516 (return) on average. On the other hand, the most expensive months are August and December, when the average cost of return tickets is £880 and £842 respectively.

Good to know - Cheap tickets from London to Maine

Low seasonFebruary
Cheapest flight£342
Best time to beat the crowds (35% less expensive on average)
Most popular time to fly and prices are also 27% lower on average.
Flight from London Heathrow Airport to Portland

FAQs - booking Maine flights

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

    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 Maine.

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

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

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

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

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

    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 from London to Maine up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines flying from London to Maine

 
See real verified KAYAK customer reviews for airlines flying from London to Maine. 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 Maine? 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.
7.7
FinnairOverall score based on 1386 reviews
7.5Comfort
6.9Entertainment
6.7Food
7.7Boarding
8.2Crew
Airline reviews

Great if not for the boarding by bus at Heathrow terminal 3. Medieval disappointing time-consuming and very hard on handicapped flyers. It was awful

10.0 ExcellentFrancesca, Mar 2026
LHR - BOS
Read more Finnair reviews

Great if not for the boarding by bus at Heathrow terminal 3. Medieval disappointing time-consuming and very hard on handicapped flyers. It was awful

Positive: It was refreshingly easy and polite check-in and boarding staff. Flight was on time and Helsinki is a very well-signposted airport. Shopping was nice as well. Flight was not full and I had lots of space in economy. Flight was perfectly on time. Negative: Food and drink not very good, but that it is normal on any airline. Didn't expect anything else.

Very good seat, very comfortable, good food, and good service.

It was a good flight, very comfortable seats for sleeping in business class. Probably the most comfortable business class seat I've ever had (20+ times in business class on various airlines). Service was good, but the only downside is my screen didn't work and it had to be reset multiple times to get it to shut off. I had to block my eyes because the screen was white almost the entire flight and I wore an eye mask when I slept. But when eating and reading in my seat, my eyes hurt because the only way to turn the screen off was reset it and the screen would only be off for a few minutes at a time.

Everything was wonderful! AirBus seats are more comfortable to sleep in as compared to the Boeing planes.

All reviews good because...flight from BWI to London ,economy seats was miserable. I usually book 1,step up from economy but this would have added 1500 bucks 1 way. Bit the bullet and upgraded for retun flight, otherwise all ratings would have been rock bottom.

Great. It was awesome to have boarding from the front and back of the plane as it made the process go very quickly

It was okay. The airplane was a little smaller than a flight from Thailand to Helsinki.

Wish that everyone would board the back of the plane first. Also let kids on first. The gate wasn’t open at arrival and we waited 45 minutes to takeoff. They made up for time in the air.

This was an absolutely exceptional flight. The flight attendants were extremely attentive and very friendly. They seemed to go out of their way to make us comfortable and to make sure that we had everything we needed., We were in business and were very happy with the size and the details for our pods. We would definitely recommend Finnair and will definitely be flying with them again.

Business class would have been better , poor quality blanket , services

First time flying with UA and it was a great experience. Thank you

Overall flight was ok. Flight attendant was receptive to assisting passengers with tight connections.

Checking in united could not figure out my star alliance gold. Baggage did not get marked priority and didn't receive boarding passes. When got to SFO lounge personal fixed everything Immediately

Meals were poor and service rendered on return flight was mediocre as compared to the flight we took to Germany earlier where the attendants were more attentive, energetic, and mindful of passengers' needs. Thumbs up to crew of UA 58. Thumbs down to UA 59..

Very comfortable flight, snacks and drinks were good, good communication from crew. Could have used a little more information on timing of boarding for group 5

Great flight. Got to watch a movie. Smooth flight and early arrival at ORD.

This was the first flight in the morning. We boarded fine. The cabin door was closed and we were ready to go. We were notified by the Captain that ATC issued and ground stop for 40 minutes. So, without even pushing back from the gate, we were already 40 minutes late. We actually were released to push-back and taxi at 30 minutes. But, some passengers had tight connections and were not going to make their connections. Some passengers asked about the delay and the effect on the connections and were told by the cabin attendant that all flights will be delayed and so they should be OK. However, that was not true. My connecting flight was on time and I arrived at IAH with 21 minutes to make my connection. I did and I'm happy about that, but the flight crew should not have given assurances to the passengers who might have missed their connections.

Poor communication, flight was delayed for preventable reasons. I missed my connection.

It was better than excellent. The staff in Mason City were great. The young woman that pushed my wheelchair did more than could be expected of her. She came from India 17 years ago. I don't remember her name.

Entertainment and wifi were very sub-par - audio issues and no wifi

Disaster This is why I stick to delta You get what you pay for

I had a great experience flying with JetBlue and would always choose JetBlue over the other airlines. I am also very bummed that they will discontinue flying to Belize very soon. SAD

We were delayed and had to circle due to weather and had to divert for fuel. While I understand that you can’t control the weather I would have appreciated knowing that the crew wasn’t going to run out of hours and then having to spend the night in the Raleigh airport.

Messy plane that was falling apart Small screens that didn't work

I was traveling with two small kids and our TV s were the only ones not working. Informed the flight attendant who did nothing about them.

They forced me to check my hand luggage at the gate.

I specifically choose not to check bags to ensure I can proceed directly to ground transportation upon arrival. However, due to a recurring lack of cabin space, I was again forced to gate-check my rolling luggage after going through my luggage to take out electronics and batteries. This practice unilaterally changes the service agreement made at the time of purchase. JetBlue needs to find a better way to manage overhead space that honors the carry-on baggage allowance.

Still hasn’t left. Why are you asking how it was?

Flight was good wish there were more snacks options for such a long flight but stewardesses were very pleasant as was flight crew.

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

Cabin class types available on flights to Maine

Cabin classes available on flights to Maine. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.