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

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

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

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

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

New York (JFK) is the most affordable one-stop option, with an average return flight price of £483.

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

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

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

For as low as £445, Delta can have you in London Heathrow Airport from Portland, Maine in 12h. The distance from Portland, Maine to London Heathrow Airport is about 3173 mi. This flight may include one or multiple stops.

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.

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).

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

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.

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

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.

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

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

How can I find direct flights from Portland to Heathrow?

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

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

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.

£225+ Flights from Portland, Maine to London Heathrow Airport

Cheap flight deals from Portland to Heathrow

Round-trip from	£445
One-way from	£225
Popular in	June
Cheapest in	May
Average price	£649

Delta
11/11-18/11
3 total stops
34h 34m total
Portland to London

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3/11
3 total stops
46h 30m total
Portland to London

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (£66 potential increase over avg. return price).

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Cheapest flight prices on average. 4% potential price decrease (£25 potential savings vs. average return price).

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Average for round-trip flights in October 2025

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Find flight deals from Portland to Heathrow

Enter your travel dates to find the best prices.

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 15 Οκτωβρίου 2025.

Τρι 11/1113:25PWM - LHR

1 stop12h 00mDelta

Τρι 18/1106:20LHR - PWM

2 stops22h 34mDelta

Deal found 14/10£445

Τρι 11/1114:30PWM - LHR

1 stop12h 35mKLM

Τρι 18/1116:10LHR - PWM

1 stop12h 44mKLM

Deal found 14/10£451

Πεμ 27/1106:00PWM - LHR

1 stop24h 40mVirgin Atlantic

Πεμ 4/1206:20LHR - PWM

2 stops21h 03mVirgin Atlantic

Deal found 13/10£454

Τρι 11/1117:37PWM - LHR

1 stop11h 48mAmerican Airlines

Τρι 18/1107:50LHR - PWM

2 stops15h 20mAmerican Airlines

Deal found 14/10£464

Πεμ 27/1109:00PWM - LHR

2 stops28h 30mScandinavian Airlines

Πεμ 4/1206:40LHR - PWM

3 stops22h 19mScandinavian Airlines

Deal found 13/10£473

Παρ 28/1106:00PWM - LHR

1 stop20h 50mVirgin Atlantic

Παρ 5/1209:00LHR - PWM

2 stops18h 23mVirgin Atlantic

Deal found 14/10£482

Παρ 17/1013:27PWM - LHR

1 stop12h 18mDelta

Τρι 21/1009:55LHR - PWM

2 stops17h 24mDelta

Deal found 14/10£483

Πεμ 11/1216:53PWM - LHR

1 stop10h 52mKLM

Τρι 16/1216:10LHR - PWM

1 stop12h 49mKLM

Deal found 15/10£488

Παρ 17/1013:27PWM - LHR

1 stop12h 18mKLM

Τρι 21/1016:05LHR - PWM

1 stop13h 00mKLM

Deal found 14/10£488

Best flights from Portland to Heathrow
Discover carefully curated flight deals from Portland to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 15 Οκτωβρίου 2025.

Τρι 11/1113:25PWM - LHR

1 stop12h 00mDelta

Τρι 18/1106:20LHR - PWM

2 stops22h 34mDelta

Deal found 14/10£445

Τρι 11/1114:30PWM - LHR

1 stop12h 35mKLM

Τρι 18/1116:10LHR - PWM

1 stop12h 44mKLM

Deal found 14/10£451

Πεμ 27/1106:00PWM - LHR

1 stop24h 40mVirgin Atlantic

Πεμ 4/1206:20LHR - PWM

2 stops21h 03mVirgin Atlantic

Deal found 13/10£454

Πεμ 27/1109:00PWM - LHR

2 stops27h 40mScandinavian Airlines

Πεμ 4/1206:40LHR - PWM

2 stops22h 19mScandinavian Airlines

Deal found 13/10£467

Τρι 11/1106:00PWM - LHR

1 stop10h 20mUnited Airlines

Τρι 18/1116:00LHR - PWM

1 stop12h 17mUnited Airlines

Deal found 14/10£488

Παρ 28/1118:37PWM - LHR

2 stops12h 53mAmerican Airlines

Παρ 5/1207:50LHR - PWM

2 stops15h 25mAmerican Airlines

Deal found 14/10£505

Παρ 28/1106:00PWM - LHR

1 stop20h 50mVirgin Atlantic

Παρ 5/1209:00LHR - PWM

2 stops18h 23mVirgin Atlantic

Deal found 14/10£482

Πεμ 11/1214:34PWM - LHR

1 stop10h 46mDelta

Τρι 16/1209:00LHR - PWM

2 stops19h 59mDelta

Deal found 15/10£482

Πεμ 11/1216:53PWM - LHR

1 stop10h 52mKLM

Τρι 16/1216:10LHR - PWM

1 stop12h 49mKLM

Deal found 15/10£488

Δευ 9/316:00PWM - LHR

1 stop12h 25mUnited Airlines

Δευ 16/313:50LHR - PWM

2 stops33h 46mUnited Airlines

Deal found 13/10£516

Last-minute flights from Portland to Heathrow
Discover last-minute flight deals from Portland to Heathrow. Data last updated 15 Οκτωβρίου 2025 and is based on user searches.

Παρ 17/1013:27PWM - LHR

1 stop12h 18mDelta

Τρι 21/1009:55LHR - PWM

2 stops17h 24mDelta

Deal found 14/10£483

Παρ 17/1013:27PWM - LHR

1 stop12h 18mKLM

Τρι 21/1016:05LHR - PWM

1 stop13h 00mKLM

Deal found 14/10£488

Τρι 11/1113:25PWM - LHR

1 stop12h 00mDelta

Τρι 18/1106:20LHR - PWM

2 stops22h 34mDelta

Deal found 14/10£445

Τρι 11/1114:30PWM - LHR

1 stop12h 35mKLM

Τρι 18/1116:10LHR - PWM

1 stop12h 44mKLM

Deal found 14/10£451

Τρι 11/1117:37PWM - LHR

1 stop11h 48mAmerican Airlines

Τρι 18/1107:50LHR - PWM

2 stops15h 20mAmerican Airlines

Deal found 14/10£464

Πεμ 27/1106:00PWM - LHR

1 stop24h 40mVirgin Atlantic

Πεμ 4/1206:20LHR - PWM

2 stops21h 03mVirgin Atlantic

Deal found 13/10£454

Πεμ 27/1109:00PWM - LHR

2 stops28h 30mScandinavian Airlines

Πεμ 4/1206:40LHR - PWM

3 stops22h 19mScandinavian Airlines

Deal found 13/10£473

Παρ 28/1106:00PWM - LHR

1 stop20h 50mVirgin Atlantic

Παρ 5/1209:00LHR - PWM

2 stops18h 23mVirgin Atlantic

Deal found 14/10£482

Παρ 28/1118:37PWM - LHR

2 stops12h 53mAmerican Airlines

Παρ 5/1207:50LHR - PWM

2 stops15h 25mAmerican Airlines

Deal found 14/10£505

One-way flights from Portland to Heathrow
Search for one-way flight options from Portland to Heathrow. Find affordable one-way fares based on user searches. Data last updated 15 Οκτωβρίου 2025.

Δευ 3/1118:05PWM - LHR

3 stops46h 30mMultiple Airlines

Deal found 14/10£225

Δευ 3/1119:44PWM - LHR

2 stops29h 46mAir Canada

Deal found 14/10£304

Δευ 3/1117:00PWM - LHR

1 stop31h 55mUnited Airlines

Deal found 14/10£310

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PWM - LHR

PWMLHR

Portland

Τρι 11/11

13:25-06:25

1 stop12h 00m

London Heathrow

Τρι 18/11

06:20-23:54

2 stops22h 34m

£445

PortlandLondon

PWM - LHR

PWMLHR

Portland

Τρι 11/11

14:30-08:05

1 stop12h 35m

London Heathrow

Τρι 18/11

16:10-23:54

1 stop12h 44m

£451

PortlandLondon

PWM - LHR

PWMLHR

Portland

Πεμ 27/11

06:00-11:40

1 stop24h 40m

London Heathrow

Πεμ 4/12

06:20-22:23

2 stops21h 03m

£454

PortlandLondon

PWM - LHR

PWMLHR

Portland

Πεμ 27/11

09:00-17:40

2 stops27h 40m

London Heathrow

Πεμ 4/12

06:40-23:59

2 stops22h 19m

£467

PortlandLondon

PWM - LHR

PWMLHR

Portland

Παρ 28/11

06:00-07:50

1 stop20h 50m

London Heathrow

Παρ 5/12

09:00-22:23

2 stops18h 23m

£482

PortlandLondon

PWM - LHR

PWMLHR

Portland

Πεμ 11/12

14:34-06:20

1 stop10h 46m

London Heathrow

Τρι 16/12

09:00-23:59

2 stops19h 59m

£482

PortlandLondon

PWM - LHR

PWMLHR

Portland

Πεμ 11/12

16:53-08:45

1 stop10h 52m

London Heathrow

Τρι 16/12

16:10-23:59

1 stop12h 49m

£488

PortlandLondon

PWM - LHR

PWMLHR

Portland

Τρι 11/11

06:00-21:20

1 stop10h 20m

London Heathrow

Τρι 18/11

16:00-23:17

1 stop12h 17m

£488

PortlandLondon

PWM - LHR

PWMLHR

Portland

Παρ 28/11

18:37-12:30

2 stops12h 53m

London Heathrow

Παρ 5/12

07:50-18:15

2 stops15h 25m

£505

PortlandLondon

PWM - LHR

PWMLHR

Portland

Δευ 9/3

16:00-08:25

1 stop12h 25m

London Heathrow

Δευ 16/3

13:50-19:36

2 stops33h 46m

£516

Flights are sorted by cheapest return flights first.

Deals found on 14/10

Showing 1-10 of 13 results

Best time to book a flight from Portland to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Portland 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 Portland to London Heathrow Airport

Prices

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

Currently, February is the cheapest month in which you can book a flight from Portland, Maine to London Heathrow Airport (average of £264). Flying from Portland, Maine to London Heathrow Airport in June is currently the most expensive (average of £448). 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.

Related info for your journey

What airport do you fly from for flights from Portland to London Heathrow?
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.
How long is the flight from Portland, Maine to London Heathrow Airport?
For as low as £445, Delta can have you in London Heathrow Airport from Portland, Maine in 12h. The distance from Portland, Maine to London Heathrow Airport is about 3173 mi. This flight may include one or multiple stops.
Can I find deals for flights from Portland to Heathrow that include hotel bookings?
Yes. In addition to deals on Portland to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Portland to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Heathrow.
Can I find deals for business class flights from Portland to Heathrow?
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.
What is the cheapest month to book a flight from Portland, Maine to London Heathrow Airport?
Currently, February is the cheapest month in which you can book a flight from Portland, Maine to London Heathrow Airport (average of £264). Flying from Portland, Maine to London Heathrow Airport in June is currently the most expensive (average of £448). 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.

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

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.

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

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.

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

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

Can Cheapflights notify me if prices for flights from Portland to Heathrow 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!

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Cheap flights from Portland, Maine to London Heathrow Airport from £225

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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portland to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find 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 15 Οκτωβρίου 2025.

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 15 Οκτωβρίου 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to London Heathrow Airport that are best for you.

Best time to book a flight from Portland to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Portland with our price prediction graph.

Cheapflights Insights

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?

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

What’s the fastest stopover option 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?

Travelling to a place near London Heathrow Airport?

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Alternative routes for Portland to Heathrow

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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 15 Οκτωβρίου 2025.