Question 1

What is the most punctual flight time for London to Portland flights?

Accepted Answer

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Question 2

What is the cheapest month to fly to Portland?

Accepted Answer

The cheapest month to fly to Portland from London Heathrow Airport is in November. Flight prices, which tend to average around £544, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in November, then you should wait until September to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of £559.

Question 3

How far in advance should I book a flight to Portland?

Accepted Answer

You are more likely to see cheaper flights to Portland from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Portland for around £654 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland from London Heathrow Airport for as low as £589 on momondo.

Question 4

Which stopover airport offers the lowest fares from London Heathrow Airport to Portland?

Accepted Answer

Flights via Phoenix (PHX) offer the lowest average return price of £554.

Question 5

Which stopover airport has the shortest travel time from London Heathrow Airport to Portland?

Accepted Answer

Flights connecting via Seattle (SEA) have the shortest average one-way travel time: 13h 14m.

Question 6

Which stopover airport has the shortest connection time from London Heathrow Airport to Portland?

Accepted Answer

Denver (DEN) has the shortest average stopover time for this route: 1h 28m.

Question 7

What is the cheapest time of day to depart on your flight to Portland?

Accepted Answer

Flying to Portland from London Heathrow Airport at midday is the least expensive time of day to depart. momondo users have found prices as low as £661 when looking at flights departing at midday. Try not to purchase tickets in the afternoon because they tend to be around £731. Of course, these prices can vary depending on the time of year and what airport you fly to.

Question 8

What cabin class options are available on London Heathrow to Portland flights?

Accepted Answer

There are 3 cabin classes available to choose from on London Heathrow to Portland flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Question 9

What is the cheapest London Heathrow to Portland flight route?

Accepted Answer

Fly from London Heathrow to Portland for the best London Heathrow - Portland flight prices

Question 10

How many flights depart from London Heathrow Airport to Portland on average per week?

Accepted Answer

23 flights are operational weekly from London Heathrow Airport to Portland as of January 2026. The most popular departure day for this route is Wed, with 30% of flights per week taking off on this day.

Question 11

How many flights depart from London Heathrow Airport to Portland on average per day?

Accepted Answer

The number of flights available between London Heathrow Airport and Portland is 3 per day as of January 2026. The most frequent departure time is 13:00, with 100% of daily flights leaving in the afternoon.

Question 12

What is the cheapest airline that flies from London Heathrow to Portland?

Accepted Answer

Icelandair is the most popular carrier operating from London Heathrow to Portland

Question 13

Which airport is the most popular for stopovers for flights between London Heathrow Airport and Portland?

Accepted Answer

Reykjavik (KEF) was the most common stop: 29% of momondo users choosing one-stop flights on this route connected there.

Question 14

How often are flights from London to Portland delayed?

Accepted Answer

Historically, on average around 20% of flights between London and Portland have experienced a delay on any given week. The average delay length over the past 12 months has been 115 minutes.

Question 15

Can stopping save me money on London Heathrow Airport to Portland flights?

Accepted Answer

You could potentially save up to 13% on your flight if you consider stops on a London Heathrow Airport to Portland flight.

Question 16

Which airlines fly to Portland?

Accepted Answer

British Airways, Virgin Atlantic and Finnair are the top three most popular airlines that fly to Portland from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 67% of people opting to fly with this airline when travelling to Portland. Keep in mind that there are 11 different airlines that fly to Portland on a routine basis, so you have a few additional options to choose from.

Question 17

Which airline has the best punctuality record on London to Portland flights?

Accepted Answer

According to our data, British Airways have had the fewest delays on this route over the last 12 months, with about 20% of their flights experiencing any sort of delay.

Question 18

What day of the week experiences the fewest flight delays on this route?

Accepted Answer

Friday is statistically the day of the week that experiences the fewest delays on this flight route. Wednesday has historically seen more delays on average compared to the rest of the week.

Question 19

How have London Heathrow Airport to Portland flight prices changed over time?

Accepted Answer

As of January 2026, prices for London Heathrow Airport to Portland flights are approximately 11% more expensive when compared to flights at the same time last year.

Question 20

What is the cheapest day to depart on your flight to Portland?

Accepted Answer

The cheapest day to depart on your flight to Portland is on a Wednesday when prices can be found for as low as £673. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Portland is Sunday, with ticket prices averaging around £763.

Question 21

When did momondo last update prices for flights from London Heathrow Airport to Portland Airport?

Accepted Answer

Prices for flights from London Heathrow Airport to Portland Airport were last updated today.

Question 22

How many operators does momondo search for flights from London Heathrow Airport to Portland Airport?

Accepted Answer

The number of operators available for flights from London Heathrow Airport to Portland Airport is 11 as of January 2026.

Question 23

How old do you have to be to fly from London Heathrow Airport to Portland Airport?

Accepted Answer

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Portland Airport.

Question 24

What documentation or ID do you need to fly to Portland Airport?

Accepted Answer

The travel and health documents required for your trip to Portland Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Portland Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best price found	£662
Fastest flight time	10h 00m
Direct flights	Every day
Airports in Portland	1 airport

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom £428	Free Cancellation	Rating 7.1 596 reviews	Search Icelandair flights
United Airlines	PriceFrom £496	Free Cancellation	Rating 7.4 9,164 reviews	Search United Airlines flights
Air Canada	PriceFrom £497	Free Cancellation	Rating 7.1 10,624 reviews	Search Air Canada flights
Finnair	PriceFrom £502	Free Cancellation	Rating 7.6 1,349 reviews	Search Finnair flights
Lufthansa	PriceFrom £505	Free Cancellation	Rating 6.8 7,718 reviews	Search Lufthansa flights
Virgin Atlantic	PriceFrom £507	Free Cancellation	Rating 7.5 678 reviews	Search Virgin Atlantic flights
British Airways	PriceFrom £508	Free Cancellation	Rating 6.7 7,680 reviews	Search British Airways flights
KLM	PriceFrom £522	Free Cancellation	Rating 7.7 1,440 reviews	Search KLM flights
American Airlines	PriceFrom £541	Free Cancellation	Rating 7.2 11,135 reviews	Search American Airlines flights
Iberia	PriceFrom £573	Free Cancellation	Rating 7.0 3,087 reviews	Search Iberia flights

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How to get the cheapest flight ticket from London Heathrow Airport to Portland

What is the cheapest month to fly to Portland?

What is the cheapest day to depart on your flight to Portland?

What is the cheapest time of day to depart on your flight to Portland?

What is the cheapest London Heathrow to Portland flight route?

Fly from London Heathrow to Portland for the best London Heathrow - Portland flight prices

How far in advance should I book a flight to Portland?

What cabin class options are available on London Heathrow to Portland flights?

There are 3 cabin classes available to choose from on London Heathrow to Portland flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London Heathrow Airport to Portland flights?

You could potentially save up to 13% on your flight if you consider stops on a London Heathrow Airport to Portland flight.

How have London Heathrow Airport to Portland flight prices changed over time?

As of January 2026, prices for London Heathrow Airport to Portland flights are approximately 11% more expensive when compared to flights at the same time last year.

What is the cheapest airline that flies from London Heathrow to Portland?

Icelandair is the most popular carrier operating from London Heathrow to Portland

Which airlines fly to Portland?

How often are flights from London to Portland delayed?

Historically, on average around 20% of flights between London and Portland have experienced a delay on any given week. The average delay length over the past 12 months has been 115 minutes.

What is the most punctual flight time for London to Portland flights?

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Friday is statistically the day of the week that experiences the fewest delays on this flight route. Wednesday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on London to Portland flights?

According to our data, British Airways have had the fewest delays on this route over the last 12 months, with about 20% of their flights experiencing any sort of delay.

Which airport is the most popular for stopovers for flights between London Heathrow Airport and Portland?

Reykjavik (KEF) was the most common stop: 29% of momondo users choosing one-stop flights on this route connected there.

Which stopover airport offers the lowest fares from London Heathrow Airport to Portland?

Flights via Phoenix (PHX) offer the lowest average return price of £554.

Which stopover airport has the shortest travel time from London Heathrow Airport to Portland?

Flights connecting via Seattle (SEA) have the shortest average one-way travel time: 13h 14m.

Which stopover airport has the shortest connection time from London Heathrow Airport to Portland?

Denver (DEN) has the shortest average stopover time for this route: 1h 28m.

How many flights depart from London Heathrow Airport to Portland on average per day?

The number of flights available between London Heathrow Airport and Portland is 3 per day as of January 2026. The most frequent departure time is 13:00, with 100% of daily flights leaving in the afternoon.

How many flights depart from London Heathrow Airport to Portland on average per week?

23 flights are operational weekly from London Heathrow Airport to Portland as of January 2026. The most popular departure day for this route is Wed, with 30% of flights per week taking off on this day.

When to book flights from London Heathrow Airport to Portland

Cheap London Heathrow Airport to Portland (LHR to PDX) flight deals and tips

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When did momondo last update prices for flights from London Heathrow Airport to Portland Airport?

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How old do you have to be to fly from London Heathrow Airport to Portland Airport?

What documentation or ID do you need to fly to Portland Airport?

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What is the most popular airline from London Heathrow Airport to Portland?

Best airlines flying from London Heathrow Airport to Portland

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