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

Flights via Seattle (SEA) have the shortest average one-way travel time for one-stop routes: 11h 24m.

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

Reykjavik (KEF) – chosen by Cheapflights users on 75% of one-stop itineraries from Portland to London Heathrow Airport on Cheapflights.

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

Flights via Seattle (SEA) offer the fastest connection on this route, with an average stopover time of 1h 02m.

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

Seattle (SEA) is the most affordable one-stop option, with an average return flight price of £672.

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

For as low as £482, Delta can have you in London Heathrow Airport from Portland in 22h 10m. The distance between Portland and London Heathrow Airport is about 4896 mi.

What are the cheapest airlines flying from Portland to London Heathrow Airport round-trip?

According to our current data, British Airways (£378), and Icelandair (£433) offers the cheapest pricing from Portland to London Heathrow Airport. These flights start at 37% lower than the current average price 3 months from now.

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 are the cheapest flights from Portland to London Heathrow Airport?

On average you can expect to pay £2,241 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is £1,340 while the most popular route, (Portland - London Heathrow) is currently priced at £404.

What are the most reliable airlines from Portland to London Heathrow Airport?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Portland to London Heathrow Airport on time: American Airlines (77%), Alaska Airlines (77%), Aer Lingus (77%).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portland to London Heathrow Airport as you normally would.

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

Portland (PDX), located 6.0 mi from the city center, is the airport you fly out of when you book flights from Portland to London Heathrow. 2 airlines have flights from Portland to London Heathrow on a regular basis. Booking flights from Portland to London Heathrow should not be difficult; the airport handles an average of 3 outbound flights to London Heathrow per day.

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.

£228+ Flights from Portland to London Heathrow Airport

Cheapflights Tip: The best prices from Portland to London Heathrow are usually found in October or April, booked 40 days in advance, depart on a Saturday or Friday and return on a Wednesday

Cheap flight deals from Portland to Heathrow

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

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 14 February 2026.

Sun 26/719:05

PDX

LHR

1 stop32h 50m

Icelandair

Thu 20/821:25

LHR

PDX

1 stop28h 30m

Icelandair

Deal found 11/2£437

Tue 21/715:30

PDX

LHR

1 stop12h 25m

Icelandair

Tue 18/821:25

LHR

PDX

1 stop28h 30m

Icelandair

Deal found 11/2£437

Wed 22/719:05

PDX

LHR

1 stop32h 50m

Icelandair

Tue 18/821:25

LHR

PDX

1 stop28h 30m

Icelandair

Deal found 11/2£438

Thu 23/415:30

PDX

LHR

1 stop12h 25m

Icelandair

Wed 29/413:05

LHR

PDX

1 stop12h 55m

Icelandair

Deal found 14/2£440

Sat 11/415:30

PDX

LHR

1 stop12h 25m

Icelandair

Mon 20/413:05

LHR

PDX

1 stop12h 55m

Icelandair

Deal found 10/2£440

Sat 11/415:30

PDX

LHR

1 stop12h 25m

Icelandair

Sun 19/421:25

LHR

PDX

1 stop28h 35m

Icelandair

Deal found 10/2£441

Sat 11/415:30

PDX

LHR

1 stop12h 25m

Icelandair

Sat 18/421:25

LHR

PDX

1 stop28h 35m

Icelandair

Deal found 10/2£442

Thu 8/1015:30

PDX

LHR

1 stop12h 25m

Icelandair

Mon 12/1021:25

LHR

PDX

1 stop28h 30m

Icelandair

Deal found 12/2£442

Tue 7/415:30

PDX

LHR

1 stop12h 25m

Icelandair

Thu 16/421:25

LHR

PDX

1 stop28h 35m

Icelandair

Deal found 10/2£443

Tue 28/415:30

PDX

LHR

1 stop20h 50m

Icelandair

Fri 8/513:05

LHR

PDX

1 stop12h 55m

Icelandair

Deal found 13/2£445

Sat 25/415:30

PDX

LHR

1 stop12h 25m

Icelandair

Fri 15/513:05

LHR

PDX

1 stop12h 55m

Icelandair

Deal found 10/2£447

Find flight deals from Portland to Heathrow

Round-trip from	£437
One-way from	£228
Popular in	June
Cheapest in	October
Average price	£515
Good round-trip deal	£1,340 or less
Good one-way deal	£3,124 or less

Icelandair
7/8-20/8
2 total stops
61h 20m total
Portland to London

Search Deals

11/4
2 total stops
34h 05m total
Portland to London

Search Deals

Highest demand for flights based on searches. 23% potential increase in price (£134 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£23 potential savings vs. average return price).

Search Deals

Average for round-trip flights in February 2026

Search Deals

Price to beat on a round-trip flight from Portland to London Heathrow.

Search Deals

Price to beat on a one-way flight from Portland to London Heathrow.

Search Deals

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

PDX - LHR

PDXLHR

Portland

Sun 8/3

05:30-10:40

2 stops22h 10m

London Heathrow

Wed 18/3

06:30-12:25

1 stop12h 55m

£482

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 24/3

05:30-10:30

1 stop22h 00m

London Heathrow

Mon 6/4

09:55-11:10

1 stop33h 15m

£490

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 29/4

10:45-12:10

1 stop17h 25m

London Heathrow

Mon 11/5

08:40-11:10

1 stop34h 30m

£490

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 26/4

18:05-15:35

1 stop13h 30m

London Heathrow

Thu 14/5

09:55-11:10

1 stop33h 15m

£490

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 4/4

22:30-06:45

1 stop24h 15m

London Heathrow

Wed 15/4

09:55-11:10

1 stop33h 15m

£490

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 23/3

09:15-11:55

1 stop19h 40m

London Heathrow

Tue 7/4

09:55-11:10

1 stop33h 15m

£490

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 24/3

17:40-20:10

2 stops19h 30m

London Heathrow

Tue 7/4

08:40-11:10

1 stop34h 30m

£493

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 12/4

19:05-13:20

1 stop34h 15m

London Heathrow

Tue 28/4

06:50-20:42

2 stops21h 52m

£494

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 14/4

05:30-12:10

1 stop22h 40m

London Heathrow

Wed 22/4

08:40-20:05

2 stops19h 25m

£497

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 9/3

15:15-11:50

1 stop13h 35m

London Heathrow

Fri 20/3

10:05-18:47

1 stop15h 42m

£503

Flights are sorted by cheapest return flights first.

Deals found on 10/2

Showing 1-10 of 22 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.

PDX-LHR

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

How far ahead should I book a flight from Portland to London Heathrow Airport?

The best time to book flights from Portland to London Heathrow Airport is 40 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, December is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of £379). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £593). 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.

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with Icelandair and British Airways from Portland to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Icelandair

7.1

Good

614 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,Nov 2025

AMS - KEF

We paid a total of 328.00 for specific seats and we were not assigned to any of the seats for which we paid.

Icelandair

7.1

Good

614 reviews

Icelandair

7.1

Good

614 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,Nov 2025

AMS - KEF

We paid a total of 328.00 for specific seats and we were not assigned to any of the seats for which we paid.

British Airways

6.7

Okay

7,739 reviews

Icelandair

7.1

Good

614 reviews

Check prices

Reviews

1 / 20

2.0

Mediocre

Anonymous,Nov 2025

AMS - KEF

We paid a total of 328.00 for specific seats and we were not assigned to any of the seats for which we paid.

Related info for your journey

What airport do you fly from for flights from Portland to London Heathrow?
Portland (PDX), located 6.0 mi from the city center, is the airport you fly out of when you book flights from Portland to London Heathrow. 2 airlines have flights from Portland to London Heathrow on a regular basis. Booking flights from Portland to London Heathrow should not be difficult; the airport handles an average of 3 outbound flights to London Heathrow per day.
How long is the flight from Portland to London Heathrow Airport?
For as low as £482, Delta can have you in London Heathrow Airport from Portland in 22h 10m. The distance between Portland and London Heathrow Airport is about 4896 mi.
What are the cheapest airlines flying from Portland to London Heathrow Airport round-trip?
According to our current data, British Airways (£378), and Icelandair (£433) offers the cheapest pricing from Portland to London Heathrow Airport. These flights start at 37% lower than the current average price 3 months from now.
What are the most reliable airlines from Portland to London Heathrow Airport?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Portland to London Heathrow Airport on time: American Airlines (77%), Alaska Airlines (77%), Aer Lingus (77%).
What are the cheapest flights from Portland to London Heathrow Airport?
On average you can expect to pay £2,241 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is £1,340 while the most popular route, (Portland - London Heathrow) is currently priced at £404.
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 to London Heathrow Airport?
Currently, December is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of £379). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £593). 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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Top 2 airlines flying from Portland to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£378	Average£530	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Icelandair	Cheapest£433	Average£441	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Portland to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Heathrow from Portland.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Portland to Heathrow flexibly with Cheapflights today.

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

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Cheap flights from Portland to London Heathrow Airport from £228

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 11/4. 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 14 February 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 14 February 2026.

Best flights from Portland to HeathrowDiscover 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 14 February 2026.

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 14 February 2026.

Direct flights from Portland to HeathrowExplore direct flight options from Portland to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 14 February 2026.

Explore direct flight options from Portland to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 14 February 2026.

Last-minute flights from Portland to HeathrowDiscover last-minute flight deals from Portland to Heathrow. Data last updated 14 February 2026 and is based on user searches.

Discover last-minute flight deals from Portland to Heathrow. Data last updated 14 February 2026 and is based on user searches.

One-way flights from Portland to HeathrowSearch for one-way flight options from Portland to Heathrow. Find affordable one-way fares based on user searches. Data last updated 14 February 2026.

Search for one-way flight options from Portland to Heathrow. Find affordable one-way fares based on user searches. Data last updated 14 February 2026.

Find flight deals from Portland to Heathrow

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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

How far ahead should I book a flight from Portland to London Heathrow Airport?

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

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

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

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

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

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with Icelandair and British Airways from Portland to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

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 to London Heathrow Airport?

What are the cheapest airlines flying from Portland to London Heathrow Airport round-trip?

What are the most reliable airlines from Portland to London Heathrow Airport?

What are the cheapest flights from Portland 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 to London Heathrow Airport?

Travelling to a place near London Heathrow Airport?

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Alternative routes for Portland to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Heathrow by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to England

Book a non-stop flight to one of these other cities located in England.

Search flights from Portland to Heathrow by cabin class

Find flights from Portland to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to Heathrow

Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 14 February 2026.

Portland and Heathrow flights

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Top 2 airlines flying from Portland to Heathrow

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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 14 February 2026.

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 14 February 2026.

Direct flights from Portland to Heathrow
Explore direct flight options from Portland to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 14 February 2026.

Last-minute flights from Portland to Heathrow
Discover last-minute flight deals from Portland to Heathrow. Data last updated 14 February 2026 and is based on user searches.

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 14 February 2026.