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

For as low as £725, Delta can have you in London Heathrow Airport from Portland in 18h 13m. The distance between Portland and London Heathrow Airport is about 4896 mi. This flight may include one or multiple stops.

What is the cheapest airline to fly from Portland to London Heathrow Airport round-trip?

According to our current data, British Airways (£466), offers the cheapest pricing from Portland to London Heathrow Airport. This flight start at 37% lower than the current average price 3 months from now.

Weekly flight availability from Portland to London Heathrow Airport

The most flights from PDX to LHR are scheduled on a Wednesday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).

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 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 (83%), Alaska Airlines (83%), Aer Lingus (83%).

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. 1 airline 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 6 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.

£245+ Cheap Flights from Portland to London Heathrow Airport

Cheapflights Tip: The best prices from Portland to London Heathrow are usually found in February or January, booked 83 days in advance, depart on a Tuesday or Thursday and return on a Friday

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 9 October 2026.

Thu 3/1214:45 -

2 stops22h 55m

Sun 13/1206:40 -

2 stops18h 20m

Deal found 6/10£564

Mon 19/1015:30 -

2 stops22h 05m

Wed 28/1007:05 -

2 stops17h 55m

Deal found 4/10£567

Mon 2/1114:45 -

3 stops34h 50m

Mon 9/1106:40 -

2 stops18h 20m

Deal found 5/10£568

Thu 5/1107:00 -

3 stops30h 40m

Wed 11/1118:40 -

3 stops34h 06m

Deal found 5/10£571

Tue 3/1114:45 -

2 stops22h 55m

Tue 10/1118:05 -

3 stops30h 55m

Deal found 6/10£580

Thu 5/1114:45 -

3 stops18h 15m

Thu 12/1119:50 -

3 stops29h 10m

Deal found 4/10£591

Mon 26/1015:45 -

2 stops22h 50m

Mon 2/1107:05 -

2 stops17h 55m

Deal found 6/10£608

Tue 1/1214:45 -

3 stops22h 55m

Mon 7/1207:05 -

2 stops17h 55m

Deal found 6/10£618

Find flight deals from Portland to Heathrow

Round-trip from	£564
One-way from	£245
Popular in	June
Cheapest in	February
Average price	£751

3/12-13/12
4 total stops
41h 15m total
Portland to London

Search Deals

British Airways
6/1-31/12
Nonstop
9h 35m total
Portland to London

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£128 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£20 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 2026

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

Cheapest return flight

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Tue 5/1

10:00-11:50

1 stop17h 50m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£254

Fastest return journey

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Tue 5/1

07:00-06:20

1 stop15h 20m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£257

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Wed 6/1

07:00-13:30

2 stops22h 30m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£257

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Sat 2/1

23:59-10:50

2 stops26h 51m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£404

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Wed 11/11

07:08-12:20

1 stop21h 12m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£495

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Sun 8/11

07:08-12:20

1 stop21h 12m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£495

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Wed 4/11

06:08-12:20

1 stop22h 12m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£495

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Fri 6/11

06:08-12:20

1 stop22h 12m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£543

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Tue 1/12

11:32-13:45

2 stops18h 13m

London Heathrow

Wed 9/12

06:30-11:40

1 stop13h 10m

£725

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Wed 4/11

13:10-10:00

1 stop12h 50m

London Heathrow

Mon 14/12

06:30-11:20

1 stop12h 50m

£760

Flights are sorted by cheapest return flights first.

Deals found on 4/10

Showing 1-10 of 18 resultsSorted by cheapest first

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

Airlines

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 82 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, February is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of £531). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £1,028). 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.

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.

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

Airfare is below average for this route at the moment.

Portland to London Heathrow Airport flights typically cost between £583 and £982 in December.
The cheapest return price found within the last 5 days was £564 on Multiple Airlines (3 Dec–13 Dec).

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with 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.

British Airways

6.7

Okay

8,256 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jun 2026

IAH - LHR

Airline was good the flight attendant were very helpful and kind. The problem I had is with cheap tickets, my ticket was not allowed one check in baggage this was new to me. I do a lot of traveling overseas and 1 check in baggage is always allowed. Also I bought insurance for my ticket it proved to be useless. I have called several times and spoke to your customer service, not one single person mentioned it to me that baggage was not allowed. All this additional expense was too much for me. I even asked one of your customer service representative I need to buy extra baggage should I buy it now and he told me when you receive check in information you can buy it @ that time never mentioned it to me that my ticket didn’t include baggage. It was very frustrating. I will never use cheap ticket again.

British Airways

6.7

Okay

8,256 reviews

British Airways

6.7

Okay

8,256 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,Jun 2026

IAH - LHR

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. 1 airline 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 6 outbound flights to London Heathrow per day.
How long is the flight from Portland to London Heathrow Airport?
For as low as £725, Delta can have you in London Heathrow Airport from Portland in 18h 13m. The distance between Portland and London Heathrow Airport is about 4896 mi. This flight may include one or multiple stops.
What is the cheapest airline to fly from Portland to London Heathrow Airport round-trip?
According to our current data, British Airways (£466), offers the cheapest pricing from Portland to London Heathrow Airport. This flight 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 (83%), Alaska Airlines (83%), Aer Lingus (83%).
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, February is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of £531). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £1,028). 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.

See more FAQs

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Top airline flying from Portland to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£466	Average£841	FlexibilityNo cancel fee	On-time70%	Search British Airways 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?

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 to London Heathrow Airport from £245

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/1. 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 9 October 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 9 October 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 9 October 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 9 October 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 9 October 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 9 October 2026.

Last-minute flights from Portland to HeathrowDiscover last-minute flight deals from Portland to Heathrow. Data last updated 9 October 2026 and is based on user searches.

Discover last-minute flight deals from Portland to Heathrow. Data last updated 9 October 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 9 October 2026.

Search for one-way flight options from Portland to Heathrow. Find affordable one-way fares based on user searches. Data last updated 9 October 2026.

Find flight deals from Portland to Heathrow

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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

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 82 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?

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.

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

Airfare is below average for this route at the moment.

Portland to London Heathrow Airport flights typically cost between £583 and £982 in December.The cheapest return price found within the last 5 days was £564 on Multiple Airlines (3 Dec–13 Dec).

Weekly flight availability from Portland to London Heathrow Airport

The most flights from PDX to LHR are scheduled on a Wednesday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with 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

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 is the cheapest airline to fly from Portland to London Heathrow Airport round-trip?

What are the most reliable airlines 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?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 9 October 2026.

Portland and Heathrow flights

Browse other Portland and Heathrow flight options. Last updated on 9 October 2026.

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Top airline flying from 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 9 October 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 9 October 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 9 October 2026.

Last-minute flights from Portland to Heathrow
Discover last-minute flight deals from Portland to Heathrow. Data last updated 9 October 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 9 October 2026.

Portland to London Heathrow Airport flights typically cost between £583 and £982 in December.
The cheapest return price found within the last 5 days was £564 on Multiple Airlines (3 Dec–13 Dec).