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

Airfare is below average for this route at the moment. Portland, Maine to London Heathrow Airport flights typically cost between £570 and £584 in March. The cheapest return flight price found within the last 3 days was £464 on American Airlines (31 Mar-14 Apr).

Question 1

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

Accepted Answer

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

Question 2

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

Accepted Answer

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

Question 3

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

Accepted Answer

New York (JFK) is the most affordable one-stop option, with an average return flight price of £478.

Question 4

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

Accepted Answer

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

Question 5

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

Accepted Answer

Airfare is below average for this route at the moment.Portland, Maine to London Heathrow Airport flights typically cost between £570 and £584 in March.
The cheapest return flight price found within the last 3 days was £464 on American Airlines (31 Mar-14 Apr).

Question 6

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

Accepted Answer

For as low as £481, American Airlines can have you in London Heathrow Airport from Portland, Maine in 13h 20m. The distance from Portland, Maine to London Heathrow Airport is about 3173 mi. This flight may include one or multiple stops.

Question 7

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

Accepted Answer

Currently, October is the cheapest month in which you can book a flight from Portland, Maine to London Heathrow Airport (average of £323). Flying from Portland, Maine to London Heathrow Airport in June is currently the most expensive (average of £442). 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 Heathrow Airport 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 Heathrow Airport when rainfall is around 40.0 mm.

Question 9

E

Accepted Answer

If weather is an important factor for your trip to London Heathrow Airport, 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 is the cheapest time of day to fly from PWM to LHR?

Accepted Answer

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

Question 11

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

Accepted Answer

For a flight from Portland to London Heathrow, you will be flying from Portland. Portland (PWM) is just 2.9 mi from the center of the city. Portland is the only Portland airport and it handles 0 outbound flights to London Heathrow per day. 0 airlines have flights to London Heathrow from Portland on a regular basis.

Question 12

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

Accepted Answer

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

Question 13

How can I find direct flights from Portland to Heathrow?

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 Heathrow.

Question 14

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

Accepted Answer

Yes. Cheapflights offers flight deals from Portland to Heathrow 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 15

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

Accepted Answer

Deals for Portland to Heathrow flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Question 16

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

Accepted Answer

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 Portland to Heathrow.

Question 17

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

Accepted Answer

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

Question 18

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

Accepted Answer

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!

Round-trip from	£464
One-way from	£376
Popular in	December
Cheapest in	October
Average price	£581

Cheap flights from Portland, Maine to London Heathrow Airport from £376

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 19/6. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portland to Heathrow

Cheapest flights from Portland to HeathrowExplore the most affordable flight options available from Portland to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 January 2026.

Explore the most affordable flight options available from Portland to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 January 2026.

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

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

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

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

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

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

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

Related info for your journey

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

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

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

How can I find direct flights from Portland to Heathrow?

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

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

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

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

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

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

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Cheapest flights from Portland to Heathrow
Explore the most affordable flight options available from Portland to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 January 2026.