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Cheap Flights from Portland to London Heathrow

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 to London Heathrow? Find the lowest prices on one-way and return tickets right here.
London.R 3,204 per passenger.Departing Thu, 2 Oct.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Portland on Thu, 2 Oct, arriving in London Heathrow.Price includes taxes and charges.From R 3,204, select.
London.R 4,816 per passenger.Departing Sun, 7 Sep.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Portland on Sun, 7 Sep, arriving in London Heathrow.Price includes taxes and charges.From R 4,816, select.
London.R 4,845 per passenger.Departing Sun, 17 Aug.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Portland on Sun, 17 Aug, arriving in London Heathrow.Price includes taxes and charges.From R 4,845, select.
London.R 5,461 per passenger.Departing Mon, 28 Jul.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from Portland on Mon, 28 Jul, arriving in London Heathrow.Price includes taxes and charges.From R 5,461, select.
London.R 6,677 per passenger.Departing Thu, 20 Nov.One-way flight with Hawaiian Airlines.Outbound indirect flight with Hawaiian Airlines, departs from Portland on Thu, 20 Nov, arriving in London Heathrow.Price includes taxes and charges.From R 6,677, select.
London.R 7,031 per passenger.Departing Wed, 8 Apr.One-way flight with United.Outbound indirect flight with United, departs from Portland on Wed, 8 Apr, arriving in London Heathrow.Price includes taxes and charges.From R 7,031, select.
London.R 7,036 per passenger.Departing Sun, 10 May.One-way flight with United.Outbound indirect flight with United, departs from Portland on Sun, 10 May, arriving in London Heathrow.Price includes taxes and charges.From R 7,036, select.
London.R 7,036 per passenger.Departing Mon, 19 Jan.One-way flight with United.Outbound indirect flight with United, departs from Portland on Mon, 19 Jan, arriving in London Heathrow.Price includes taxes and charges.From R 7,036, 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.
Jul
from R 5,461
Aug
from R 4,845
Sep
from R 4,816
Oct
from R 3,204
Nov
from R 6,677
Dec
from R 7,340
Jan
from R 7,036
Feb
Find prices
Mar
Find prices
Apr
from R 7,031
May
from R 7,036
Jun
from R 12,389

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 foundR 3,204
Cheapest month to flyOctober
Average flight time9 hrs, 35 mins
Most popular airlineAer Lingus
Average flights per week37

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

The best price we found for a return flight from Portland to London Heathrow is R 9,029. 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.
9 hours and 35 minutes is the average flight time from Portland to London Heathrow.
Aer Lingus, Alaska Airlines and Finnair fly direct from Portland to London Heathrow.
As of July 2025, there are 37 flights per week flying from Portland to London Heathrow.
The cheapest month to fly from Portland to London Heathrow is usually August.
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, 26 August 2025.
Yes – the average flight time is 9 hours and 35 minutes.
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.
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.
Currently, Finnair and British Airways offer the cheapest flight tickets to London Heathrow.

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

  • Jump on a direct flight from Portland International Airport to London Heathrow Airport and you'll be travelling for an average of 9 hours 35 minutes.

  • The timezone in London is UTC+0, which is seven hours ahead of Portland.

  • You can choose from eight weekly Portland International Airport to London Heathrow Airport flights. The 18:20 departure with British Airways is the earliest flight available. British Airways operates the latest service of the day at 19:40.

  • To ensure you get on your PDX to LHR flight, allow plenty of time to check in and find your gate. Turning up two hours before international departures and an hour before domestic flights is the general rule.

  • Travelling during a peak time such as July? School holidays and other popular periods can result in longer lines and delays at security. Play things extra safe and arrive up to four hours before an international flight and two hours before a domestic departure.

  • British Airways offers direct flights from Portland International Airport to London Heathrow Airport. Book with this popular airline, then get ready to check out the sights in London — and maybe even more of United Kingdom if your schedule allows.

  • Most travellers choose to fly with British Airways on this route.

  • British Airways is the most punctual carrier that offers PDX to LHR flights, with 76.47% of its services arriving on schedule.

  • We make it a piece of cake to book a flight with a stopover. To see all your options for tickets from Portland International Airport to London Heathrow Airport, deselect 'Direct flights only.' Then, choose a flight with a stop long enough to visit the city of your choice. Popular stopovers between PDX and LHR include:

    • Seattle-Tacoma International Airport

    • Amsterdam Airport Schiphol

    • Denver International Airport

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

  • Currently, R 3,204 is the cheapest price we've seen for a one-way Portland International Airport to London Heathrow Airport flight. The best price for a return plane ticket is R 9,029. Bear in mind that fares could change due to demand when booking.

  • Get cheap tickets from PDX to LHR by booking eight months ahead. According to our research, that's the sweet spot for bagging a bargain.

  • The cheapest month for flights from Portland International Airport to London Heathrow Airport is July. Use the 'Whole month' tool to find the lowest airfares if you have flexible dates.

  • You won't have to check back in every day to find out if fares have dropped when you set up a Price Alert. We'll update you the moment there's a better deal on cheap flights from PDX to LHR.

  • Lock in the right flight for you by using the filters. To see the 'Fastest,' 'Cheapest' or 'Best' flights from Portland International Airport to London Heathrow Airport, use the 'Sort by' function. You can also filter by departure and arrival times, airline, and number of stops.

Handy information about Portland International Airport (PDX)

  • PDX is located at 7000 NE Airport Way.

  • Portland International Airport maintains a strong on-time record, making delays less likely. Departures from PDX arrive on schedule 83.65% of the time.

  • Portland International Airport is about 19 kilometres from central Portland. If you're ride-sharing, catching a cab or driving from the centre, it'll take 20 minutes or so to get there, depending on the traffic.

  • You can expect a journey time of around 45 minutes when using public transport.

  • Searching for a convenient hotel close to PDX? If you're catching an early flight from Portland International Airport to London Heathrow Airport, these accommodation options will have you sleeping moments from your check-in counter:

Arriving at London Heathrow Airport (LHR)

Getting from London Heathrow Airport (LHR) to central London

  • London Heathrow Airport to the centre of London has a drive time of about 55 minutes. It's approximately 31 kilometres away.

  • It'll take around 1 hour if you're using public transport.

When to fly to London Heathrow Airport (LHR)

  • July is the busiest month for flights from Portland International Airport to London Heathrow Airport. For smaller crowds, travel to London in February.

  • When booking your flight from Portland International Airport to London Heathrow Airport, consider the kind of weather you enjoy. July is the warmest month in London, with the temperature ranging from 11ºC (52ºF) to 26ºC (79ºF).

  • January sees average temperatures of between 0ºC (32ºF) and 9ºC (48ºF). Search for cheap tickets from PDX to LHR around that time if you like travelling in cooler conditions.

Explore more of United Kingdom

  • London has plenty going for it, but there are so many other parts of United Kingdom you should also see. Around 161 kilometres north-west of London, a trip to Birmingham will keep your itinerary busy. Start with popular sights like Cadbury World, The Library of Birmingham and National Sea Life Centre.

  • If you're looking to explore another well-known destination in United Kingdom, head for Bristol, about 177 kilometres west of London. Clifton Suspension Bridge, Cabot Tower and Brandon Hill Nature Park are the start of reasons to visit.

Plan the rest of your trip from Portland to London

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.