Cheap Flights from Portland to London Heathrow

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Compare Portland to London Heathrow flight deals

Find the cheapest month or even day of the year to fly to London Heathrow

Book the best London Heathrow fare with no extra fees

Flight deals from Portland to London Heathrow

Looking for a cheap last-minute deal or the best return flight from Portland Airport to London Heathrow Airport? If you want to travel next month, return fares start from R 10,814. Find the lowest prices on one-way and return tickets right here.

London.R 4,735 per passenger.Departing Tue, 6 Oct.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departs from Portland on Tue, 6 Oct, arriving in London Heathrow.Price includes taxes and charges.From R 4,735, select.

London.R 4,818 per passenger.Departing Tue, 1 Dec.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Portland on Tue, 1 Dec, arriving in London Heathrow.Price includes taxes and charges.From R 4,818, select.

London.R 4,823 per passenger.Departing Tue, 3 Nov.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Portland on Tue, 3 Nov, arriving in London Heathrow.Price includes taxes and charges.From R 4,823, select.

London.R 4,921 per passenger.Departing Wed, 24 Feb.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Portland on Wed, 24 Feb, arriving in London Heathrow.Price includes taxes and charges.From R 4,921, select.

London.R 4,921 per passenger.Departing Wed, 3 Mar.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Portland on Wed, 3 Mar, arriving in London Heathrow.Price includes taxes and charges.From R 4,921, select.

London.R 4,945 per passenger.Departing Wed, 13 Jan.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Portland on Wed, 13 Jan, arriving in London Heathrow.Price includes taxes and charges.From R 4,945, select.

London.R 5,217 per passenger.Departing Wed, 23 Sep.One-way flight with SWISS.Outbound indirect flight with SWISS, departs from Portland on Wed, 23 Sep, arriving in London Heathrow.Price includes taxes and charges.From R 5,217, select.

London.R 5,359 per passenger.Departing Fri, 24 Jul.One-way flight with jetBlue.Outbound indirect flight with jetBlue, departs from Portland on Fri, 24 Jul, arriving in London Heathrow.Price includes taxes and charges.From R 5,359, select.

London.R 5,418 per passenger.Departing Sat, 17 Apr.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Portland on Sat, 17 Apr, arriving in London Heathrow.Price includes taxes and charges.From R 5,418, select.

London.R 5,446 per passenger.Departing Sun, 7 Feb.One-way flight with British Airways.Outbound direct flight with British Airways departs from Portland on Sun, 7 Feb, arriving in London Heathrow.Price includes taxes and charges.From R 5,446, select.

London.R 5,447 per passenger.Departing Wed, 17 Mar.One-way flight with British Airways.Outbound direct flight with British Airways departs from Portland on Wed, 17 Mar, arriving in London Heathrow.Price includes taxes and charges.From R 5,447, select.

London.R 5,449 per passenger.Departing Wed, 7 Oct.One-way flight with British Airways.Outbound direct flight with British Airways departs from Portland on Wed, 7 Oct, arriving in London Heathrow.Price includes taxes and charges.From R 5,449, select.

London.R 5,450 per passenger.Departing Tue, 4 May.One-way flight with British Airways.Outbound direct flight with British Airways departs from Portland on Tue, 4 May, arriving in London Heathrow.Price includes taxes and charges.From R 5,450, select.

London.R 5,450 per passenger.Departing Mon, 2 Nov.One-way flight with British Airways.Outbound direct flight with British Airways departs from Portland on Mon, 2 Nov, arriving in London Heathrow.Price includes taxes and charges.From R 5,450, select.

London.R 5,450 per passenger.Departing Mon, 4 Jan.One-way flight with British Airways.Outbound direct flight with British Airways departs from Portland on Mon, 4 Jan, arriving in London Heathrow.Price includes taxes and charges.From R 5,450, select.

London.R 5,459 per passenger.Departing Wed, 30 Dec.One-way flight with British Airways.Outbound direct flight with British Airways departs from Portland on Wed, 30 Dec, arriving in London Heathrow.Price includes taxes and charges.From R 5,459, select.

Find the cheapest month to fly from Portland to London Heathrow

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Portland to London Heathrow flights are currently cheapest in October.

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Direct flights from Portland to London Heathrow

Portland to London Heathrow: Alternative routes

Compare routes from Portland to London below. You may find an airport to fly into that's cheaper, faster, or easier than London Heathrow.

Portland to London: Flight information

The things to know before you go.

Cheapest flight found	R 4,740
Cheapest month to fly	October
Average flight time	9 hrs, 34 mins
Most popular airline	Alaska Airlines
Average flights per week	44

Finding cheap flights from Portland to London Heathrow: Frequently asked questions

How much are return flights from Portland to London Heathrow?

The best price we found for a return flight from Portland to London Heathrow is R 9,623. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from Portland to London Heathrow?

9 hours and 34 minutes is the average flight time from Portland to London Heathrow.

Which airlines fly direct from Portland to London Heathrow?

Alaska Airlines, Aer Lingus and Finnair fly direct from Portland to London Heathrow.

How many flights are there a week from Portland to London Heathrow?

As of July 2026, there are 44 flights per week flying from Portland to London Heathrow.

When is the cheapest time to fly from Portland to London Heathrow?

The cheapest month to fly from Portland to London Heathrow is usually November.

Which upcoming date is cheapest to fly from Portland Airport to London Heathrow Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Portland Airport to London Heathrow Airport on Tuesday, 17 November 2026.

Can I get a direct flight from Portland Airport to London Heathrow Airport?

Yes – the average flight time is 9 hours and 34 minutes.

How can I find the best flight deal to London Heathrow?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to London Heathrow but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to London?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to London is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from Portland Airport to London Heathrow with?

Currently, Icelandair and British Airways offer the cheapest flight tickets to London Heathrow.

Flying from Portland Airport (PDX) to London Heathrow Airport (LHR): what you need to know

Jump on a direct flight from Portland Airport to London Heathrow Airport and you'll be travelling for an average of 9 hours 30 minutes.
London's timezone is UTC+0, which makes London eight hours ahead of Portland.
Every week, there are six Portland Airport to London Heathrow Airport flights. If you'd like to be on board as soon as possible, opt for the 18:30 British Airways flight. If you're eager to make the most of your day before you fly, the latest flight is at 19:30 with British Airways.
Your PDX to LHR flight won't wait if you're late, so don't forget to check in on time. Arrive up to one hour in advance for domestic flights and two hours ahead when you're flying internationally.
Flying during a peak time such as July? Public holidays and other high seasons can lead to longer lines and delays at airport checkpoints. Play it safe and get there up to four hours before an international flight and two hours before domestic departures.
Travelling to London (and then exploring more of the United Kingdom!) is a breeze with British Airways. This popular airline has direct flights from Portland Airport to London Heathrow Airport.
Most passengers choose to fly with British Airways on this route.
The most punctual carrier operating PDX to LHR flights is British Airways. Its services arrive as scheduled 72.5% of the time.
If you'd like to add a stop to your trip, simply uncheck 'Direct flights only' when searching for your ticket from Portland Airport to London Heathrow Airport. Here are the most popular stopovers between PDX and LHR:
- Denver International Airport
- Amsterdam Schiphol Airport
- Seattle / Tacoma International Airport

How to find the cheapest flights from Portland Airport (PDX) to London Heathrow Airport (LHR)

R 4,735 is the lowest price for a one-way Portland Airport to London Heathrow Airport flight. A return flight starts at R 9,633. These fares may change depending on demand and availability.
Score cheap tickets from PDX to LHR by booking two months ahead. Based on our research, that's the sweet spot for picking up a bargain.
Organise your trip for July. That's the cheapest month for flights from Portland Airport to London Heathrow Airport. If you're flexible with your dates, try out the 'Whole month' tool to see the cheapest price across every month.
Stay on top of deals for cheap flights from PDX to LHR by setting up a Price Alert. You'll get an email or notification on the app when a new low fare is offered.
Pick your preferred arrival and departure times, airlines and number of stops with the filters. Alternatively, sort your results by 'Cheapest' to find the best deals on flights from Portland Airport to London Heathrow Airport.

Handy information about Portland Airport (PDX)

The address for PDX is 7000 NE Airport Way.
Portland Airport scores high marks for on-time performance. 83% of flights that take off from PDX arrive at their destination as scheduled.
Central Portland to Portland Airport is around 19 kilometres. Depending on traffic, it'll take you about 20 minutes to get there if you're driving, ride-sharing or catching a taxi.
Planning to catch public transport? Expect a journey time of around 40 minutes.
Looking for a convenient hotel close to PDX? If you're catching an early flight from Portland Airport to London Heathrow Airport, these stays will have you moments from your departure lounge:

Arriving at London Heathrow Airport (LHR)

The last thing you want is a long trip to your hotel if you're landing late on a Portland Airport to London Heathrow Airport flight. Book one of these accommodation options near LHR instead:
Grab a London Heathrow Airport rental car and discover London and beyond with your own wheels. Surprice, U-Save and Green Motion are popular providers to choose from here.
Booking your ride from London Heathrow Airport about one week in advance gives you the best chance of locking in a great deal.

When to fly to London Heathrow Airport (LHR)

July is the busiest month for flights from Portland Airport to London Heathrow Airport. For a quieter experience, visit London in March.
The warmest month in London is July, with temperatures ranging between 11ºC (52ºF) and 26ºC (79ºF). Lock in your flights from Portland Airport to London Heathrow Airport in this month if you enjoy this type of weather.
January has average temperatures of between 0ºC (32ºF) and 9ºC (48ºF). Look for cheap tickets from PDX to LHR around that time if you like travelling in cooler conditions.

Explore more of the United Kingdom

Manchester is just one of the many places in the United Kingdom waiting to be explored after you've seen London. Around 257 kilometres away to the north-west, check out popular attractions including Manchester United Museum & Stadium Tour, The Homes of Football and Museum of Science and Industry.
Birmingham is another favourite destination in the United Kingdom and is around 161 kilometres north-west of London. No trip is complete without seeing Birmingham Museum & Art Gallery, Birmingham Hippodrome Theatre and Bournville Experience.