Q: How much does it cost for a return flight from Portland, Maine to London?

Airfare is below average for this route at the moment. Portland, Maine to London flights typically cost between £638 and £706 in January. The cheapest return flight price found within the last 3 days was £467 on Austrian Airlines (16 Jan-23 Jan).

Question 1

What’s the cheapest stopover airport for flights from Portland, Maine to London?

Accepted Answer

New York (JFK) is the most affordable one-stop option, with an average return flight price of £480.

Question 2

What’s the top stopover airport for flights from Portland, Maine to London?

Accepted Answer

Newark (EWR) – chosen by Cheapflights users on 40% of one-stop itineraries from Portland, Maine to London on Cheapflights.

Question 3

What’s the fastest stopover option from Portland, Maine to London?

Accepted Answer

Flights via Newark (EWR) have the shortest average one-way travel time for one-stop routes: 9h 40m.

Question 4

How much does it cost for a return flight from Portland, Maine to London?

Accepted Answer

Airfare is below average for this route at the moment.Portland, Maine to London flights typically cost between £638 and £706 in January.
The cheapest return flight price found within the last 3 days was £467 on Austrian Airlines (16 Jan-23 Jan).

Question 5

Which airport typically offers the quickest stopover for flights from Portland, Maine to London?

Accepted Answer

Flights via Newark (EWR) offer the fastest connection on this route, with an average stopover time of 1h 35m.

Question 6

How long is the flight from Portland, Maine to London?

Accepted Answer

There are many flights that can get you from Portland, Maine to London in 10h 38m. Fly via Virgin Atlantic, Delta, or United Airlines to get the fastest option. The distance between Portland, Maine and London is about 3173 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

Question 7

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

Accepted Answer

Currently, August is the cheapest month in which you can book a flight from Portland, Maine to London (average of £232). Flying from Portland, Maine to London in June is currently the most expensive (average of £419). 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.

Question 8

E

Accepted Answer

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Question 9

E

Accepted Answer

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Question 10

What are the most popular routes from Portland, Maine to London?

Accepted Answer

The most popular flight routes from Portland, Maine to London are Portland - London Heathrow, Portland - London Gatwick and Portland - London City.

Question 11

What is the cheapest time of day to fly from PWM to LON?

Accepted Answer

When flying from Portland, Maine to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Question 12

What airport do you fly from for flights from Portland to London?

Accepted Answer

Portland (PWM) is the airport you will fly out of if you book a flight from Portland to London. You should not have trouble finding flights to London from Portland; the airport handles an average of 0 outbound flights to London per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Portland airport to London. It is only a 2.9 mi journey to Portland (PWM) from Portland’s city center.

Question 13

Can I find deals for flights from Portland to London that include hotel bookings?

Accepted Answer

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

Question 14

How can I find direct flights from Portland to London?

Accepted Answer

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

Question 15

Can I find deals for business class flights from Portland to London?

Accepted Answer

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

Question 16

How does Cheapflights help users find flights from Portland to London?

Accepted Answer

Cheapflights helps you search for flights from Portland to London via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Question 17

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

Accepted Answer

Cheapflights helps you find that perfect flight to London from Portland by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Question 18

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

Accepted Answer

Certainly. Search results for flights to London from Portland shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Question 19

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

Accepted Answer

Yes, Cheapflights offers price alerts on Portland to London flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

Round-trip from	£467
Popular in	June
Cheapest in	October
Average price	£522

Cheap flights from Portland, Maine to London from £467

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 16/1. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portland to London

Cheapest flights from Portland to LondonExplore the most affordable flight options available from Portland to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 December 2025.

Explore the most affordable flight options available from Portland to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 December 2025.

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

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

How much does it cost for a return flight from Portland, Maine to London?

What’s the top stopover airport for flights from Portland, Maine to London?

Share of one-stop return flights from Portland, Maine to London chosen by Cheapflights users in the past 12 months, using the same stopover each way.

What’s the cheapest stopover airport for flights from Portland, Maine to London?

Average return fare for one-stop flights from Portland, Maine to London, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

What’s the fastest stopover option from Portland, Maine to London?

Shortest average travel time for one-stop one-way flights from Portland, Maine to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Which airport typically offers the quickest stopover for flights from Portland, Maine to London?

Average stopover duration for one-stop one-way flights from Portland, Maine to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Related info for your journey

Find useful and relevant information for your journey from Portland to London. 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 from for flights from Portland to London?

How long is the flight from Portland, Maine to London?

What are the most popular routes from Portland, Maine to London?

Can I find deals for flights from Portland to London that include hotel bookings?

How can I find direct flights from Portland to London?

Can I find deals for business class flights from Portland to London?

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

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

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

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Cheapest flights from Portland to London
Explore the most affordable flight options available from Portland to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 December 2025.