Question 1

What is the cheapest flight from London Heathrow Airport to Portland?

Accepted Answer

In the last 3 days, the lowest price for a flight from London Heathrow Airport to Portland was $557 for a one-way ticket and $552 for a round-trip. <a href='/flight-routes/London-Heathrow-LHR/Portland-PWM'>Visit our flight page for the latest deals!>/a>

Question 2

Do I need a passport to fly between London and Portland?

Accepted Answer

Yes, you'll most likely have to show a valid passport before boarding the plane in London and on arrival in Portland. <a href='/flight-routes/London-Heathrow-LHR/Portland-PWM'>Visit our flight page for the latest deals!>/a>

Question 3

Which aircraft models fly most regularly from London to Portland?

Accepted Answer

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

Question 4

Which airline alliances offer flights from London to Portland?

Accepted Answer

Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between London and Portland, with SkyTeam being the most commonly used for this route.

Question 5

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

Accepted Answer

The cheapest month for flights from London Heathrow Airport to Portland is February, where tickets cost $677 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $1,259 and $1,128 respectively.

Question 6

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

Accepted Answer

The cheapest month for flights from London Heathrow Airport to Portland is February, where tickets cost $677 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $1,259 and $1,128 respectively.

Question 7

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

Accepted Answer

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. <a href='/flight-routes/London-Heathrow-LHR/Portland-PWM'>Visit our flight page for the latest deals!>/a>

Question 8

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

Accepted Answer

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. <a href='/flight-routes/London-Heathrow-LHR/Portland-PWM'>Visit our flight page for the latest deals!>/a>

Question 9

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

Accepted Answer

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Portland with an airline and back to London with another airline. Booking your flights between London and PWM can sometimes prove cheaper using this method. <a href='/flight-routes/London-Heathrow-LHR/Portland-PWM'>Visit our flight page for the latest deals!>/a>

Question 10

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

Accepted Answer

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. <a href='/flight-routes/London-Heathrow-LHR/Portland-PWM'>Visit our flight page for the latest deals!>/a>

Question 11

What is the cheapest layover airport when flying from London to Portland?

Accepted Answer

Flights via New York (JFK) offer the most affordable fares, with an average round-trip price of $880.

Question 12

What is the most popular layover airport when flying from London to Portland?

Accepted Answer

Washington, D.C. (IAD) is the top choice – 73% of KAYAK users who clicked on 1-stop flights from London to Portland picked an itinerary connecting there.

Question 13

Which layover airport has the quickest connection when flying from London to Portland?

Accepted Answer

If you prefer a quick connection, Washington, D.C. (IAD) often has the shortest layovers from London to Portland, with an average of 1h 30m.

Question 14

Which layover airport offers the shortest total travel time from London to Portland?

Accepted Answer

Consider flying via New York (JFK) for the shortest journey. The average one-way travel time for flights connecting there is 11h 10m.

Question 15

Which airlines provide the cheapest flights from London to Portland?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from London to Portland were found on JetBlue ($552) and Icelandair ($608).

Question 16

Which airlines provide the cheapest flights from London to Portland?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from London to Portland were found on JetBlue ($552) and Icelandair ($608).

Question 17

How much is a round-trip flight from London Heathrow Airport to Portland, Maine?

Accepted Answer

Flight prices are below average for this route right now.Flights to Portland, Maine from London Heathrow Airport usually cost between $850 and $1,227 in September.
The lowest price found in the past 3 days was $552 on JetBlue (Sep 15-Sep 29).

Low season	November
High season	September
Cheapest flight	$552

LHR - PWM

$552 Find Cheap Flights from London to Portland

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Cheap Flights from London to Portland (LHR-PWM)

Recent round-trip flight deals from London to Portland

Recent one-way flight deals from London to Portland

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 round-trip flight from London Heathrow Airport to Portland, Maine?

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

The cheapest month for flights from London Heathrow Airport to Portland is February, where tickets cost $677 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $1,259 and $1,128 respectively.

Which airlines provide the cheapest flights from London to Portland?

In the past 3 days, the cheapest round-trip tickets from London to Portland were found on JetBlue ($552) and Icelandair ($608).

What is the most popular layover airport when flying from London to Portland?

Washington, D.C. (IAD) is the top choice – 73% of KAYAK users who clicked on 1-stop flights from London to Portland picked an itinerary connecting there.

What is the cheapest layover airport when flying from London to Portland?

Flights via New York (JFK) offer the most affordable fares, with an average round-trip price of $880.

Which layover airport offers the shortest total travel time from London to Portland?

Consider flying via New York (JFK) for the shortest journey. The average one-way travel time for flights connecting there is 11h 10m.

Which layover airport has the quickest connection when flying from London to Portland?

If you prefer a quick connection, Washington, D.C. (IAD) often has the shortest layovers from London to Portland, with an average of 1h 30m.

Good to know

When to book flights from London to Portland

FAQs for booking London to Portland flights

What is the cheapest flight from London Heathrow Airport to Portland?

In the last 3 days, the lowest price for a flight from London Heathrow Airport to Portland was $557 for a one-way ticket and $552 for a round-trip.

Do I need a passport to fly between London and Portland?

Yes, you'll most likely have to show a valid passport before boarding the plane in London and on arrival in Portland.

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, SkyTeam, and oneworld are the airline alliances operating flights between London and Portland, with SkyTeam being the most commonly used for this route.

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 round-trip ticket. You could then fly to Portland with an airline and back to London with another airline. Booking your flights between London and PWM can sometimes prove cheaper using this method.

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.

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

Information on your arrival and departure airports

Cabin class types available on flights to Portland

Complete your trip to Portland with a hotel stay or car rental

Find direct flights to and from London and Portland

Flights to other popular destinations

Flights from domestic origins to Portland

Choose which airport to fly into in London

Find deals for your return flight