Skyscanner home

698 € 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 Airport to London Heathrow Airport? If you want to travel next month, return fares start from 698 €. Find the lowest prices on one-way and return tickets right here.
London.698 € per passenger.Departing Sun, 20 Sep, returning Tue, 29 Sep.Return flight with jetBlue.Outbound indirect flight with jetBlue, departs from Portland on Sun, 20 Sep, arriving in London Heathrow.Inbound indirect flight with jetBlue, departs from London Heathrow on Tue, 29 Sep, arriving in Portland.Price includes taxes and charges.From 698 €, select.
London.720 € per passenger.Departing Wed, 26 Aug, returning Thu, 3 Sep.Return flight with KLM and jetBlue.Outbound indirect flight with KLM, departs from Portland on Wed, 26 Aug, arriving in London Heathrow.Inbound indirect flight with jetBlue, departs from London Heathrow on Thu, 3 Sep, arriving in Portland.Price includes taxes and charges.From 720 €, select.
London.759 € per passenger.Departing Mon, 12 Oct, returning Tue, 27 Oct.Return flight with United.Outbound indirect flight with United, departs from Portland on Mon, 12 Oct, arriving in London Heathrow.Inbound indirect flight with United, departs from London Heathrow on Tue, 27 Oct, arriving in Portland.Price includes taxes and charges.From 759 €, select.
London.759 € per passenger.Departing Mon, 28 Sep, returning Tue, 13 Oct.Return flight with Delta.Outbound indirect flight with Delta, departs from Portland on Mon, 28 Sep, arriving in London Heathrow.Inbound indirect flight with Delta, departs from London Heathrow on Tue, 13 Oct, arriving in Portland.Price includes taxes and charges.From 759 €, select.
London.800 € per passenger.Departing Fri, 9 Apr, returning Fri, 16 Apr.Return flight with United.Outbound indirect flight with United, departs from Portland on Fri, 9 Apr, arriving in London Heathrow.Inbound indirect flight with United, departs from London Heathrow on Fri, 16 Apr, arriving in Portland.Price includes taxes and charges.From 800 €, select.
London.837 € per passenger.Departing Thu, 26 Nov, returning Sat, 5 Dec.Return flight with United.Outbound indirect flight with United, departs from Portland on Thu, 26 Nov, arriving in London Heathrow.Inbound indirect flight with United, departs from London Heathrow on Sat, 5 Dec, arriving in Portland.Price includes taxes and charges.From 837 €, select.
London.840 € per passenger.Departing Fri, 14 Aug, returning Wed, 26 Aug.Return flight with Virgin Atlantic.Outbound indirect flight with Virgin Atlantic, departs from Portland on Fri, 14 Aug, arriving in London Heathrow.Inbound indirect flight with Virgin Atlantic, departs from London Heathrow on Wed, 26 Aug, arriving in Portland.Price includes taxes and charges.From 840 €, select.
London.885 € per passenger.Departing Fri, 20 Nov, returning Sun, 29 Nov.Return flight with KLM and Air France.Outbound indirect flight with KLM, departs from Portland on Fri, 20 Nov, arriving in London Heathrow.Inbound indirect flight with Air France, departs from London Heathrow on Sun, 29 Nov, arriving in Portland.Price includes taxes and charges.From 885 €, select.
London.889 € per passenger.Departing Tue, 1 Dec, returning Wed, 6 Jan.Return flight with United.Outbound indirect flight with United, departs from Portland on Tue, 1 Dec, arriving in London Heathrow.Inbound indirect flight with United, departs from London Heathrow on Wed, 6 Jan, arriving in Portland.Price includes taxes and charges.From 889 €, select.
London.940 € per passenger.Departing Mon, 21 Dec, returning Mon, 28 Dec.Return flight with Air France and KLM.Outbound indirect flight with Air France, departs from Portland on Mon, 21 Dec, arriving in London Heathrow.Inbound indirect flight with KLM, departs from London Heathrow on Mon, 28 Dec, arriving in Portland.Price includes taxes and charges.From 940 €, select.
London.1.536 € per passenger.Departing Wed, 10 Feb, returning Tue, 16 Feb.Return flight with United.Outbound indirect flight with United, departs from Portland on Wed, 10 Feb, arriving in London Heathrow.Inbound indirect flight with United, departs from London Heathrow on Tue, 16 Feb, arriving in Portland.Price includes taxes and charges.From 1.536 €, 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 September.
Aug
from 840 €
Sep
from 698 €
Oct
from 759 €
Nov
from 885 €
Dec
from 940 €
Jan
Find prices
Feb
from 1.536 €
Mar
Find prices
Apr
from 800 €
May
Find prices
Jun
Find prices
Jul
Find prices

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.

London City

12km from central London
Closest
from 784 €
Search flights

London Heathrow

23km from central London
from 698 €
Search flights

London Gatwick

40km from central London
Cheapest
from 636 €
Search flights

London Luton

45km from central London
from 805 €
Search flights

London Stansted

49km from central London
from 782 €
Search flights

London Southend

57km from central London
from 1.299 €
Search flights

Portland to London: Flight information

The things to know before you go.
Cheapest flight found698 €
Cheapest month to flySeptember

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 698 €. 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.
Currently, there are no airlines that fly direct from Portland to London Heathrow. But we found flights with one or more stops from 698 €.
As of August 2026, there are no flights flying from Portland to London Heathrow.
The cheapest month to fly from Portland to London Heathrow is usually September.
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 Sunday, 20 September 2026.
No airlines currently offer direct flights between Portland Airport and London Heathrow Airport. Most routes have one or more stops.
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, jetBlue offers the cheapest flight tickets to London Heathrow.

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

  • London's timezone is UTC+0, which makes London five hours ahead of Portland.

  • Your PWM to LHR flight won't wait if you're late, so show up at the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead for international travel.

  • Heading away during a peak period like public or school holidays? Expect longer queues at check-in and security. To play it safe, arrive up to four hours before international flights and two hours ahead of domestic departures.

  • We make it simple to book a flight with a stopover. To see all your options for tickets from Portland Airport to London Heathrow Airport, deselect 'Direct flights only.' Then, pick a flight with a stop long enough to explore your chosen city. Some great stopovers between PWM and LHR include:

    • New York John F. Kennedy Airport

    • New York Newark Airport

    • Washington Dulles Airport

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

  • At the moment, 285 € is the cheapest price we've seen for a one-way Portland Airport to London Heathrow Airport flight. The best price for a return plane ticket is 698 €. Remember that fares could change due to availability at the time of booking.

  • To get your hands on cheap tickets from PWM to LHR, book in advance. Airlines tend to offer lower fares when flights are first released.

  • If you can be flexible with your travel plans, use the 'Whole month' search function. It'll find the cheapest price in each month when searching for a flight from Portland Airport to London Heathrow Airport.

  • Save time searching for cheap flights from PWM to LHR by setting up a Price Alert. You'll receive an email or notification on the app when a lower fare becomes available.

  • Tailor your trip with filters. Pick your arrival and departure times, airlines and total journey duration. You can also sort the results by 'Best,' 'Cheapest' or 'Fastest' flights from Portland Airport to London Heathrow Airport.

Handy information about Portland Airport (PWM)

  • PWM is located at 1001 Westbrook Street.

  • Of all flights leaving Portland Airport, 79% arrive on time at their destination.

  • To reach Portland Airport from central Portland, it takes about 15 minutes by car. Of course, this depends on traffic conditions. It's approximately 8 kilometres from the airport to the city centre.

  • Planning to take public transport? You can expect a journey time of around 30 minutes.

  • Get your journey off to a relaxed start by staying near PWM. Whether you're taking an early flight from Portland Airport to London Heathrow Airport or want to avoid feeling rushed, these hotels are the answer:

Arriving at London Heathrow Airport (LHR)

Getting from London Heathrow Airport (LHR) to central London

  • London Heathrow Airport to central London has a drive time of about 45 minutes. It's approximately 24 kilometres away.

  • If you're travelling by public transport, expect a journey time of roughly 25 minutes.

When to fly to London Heathrow Airport (LHR)

  • It's time to choose your trip dates for your flight from Portland Airport to London Heathrow Airport. July is the most popular month to head to London. If you'd like a more relaxed vibe, go in March.

  • Before locking in your flight from Portland Airport to London Heathrow Airport, think about the kind of weather you like. July is the warmest month in London, with temperatures ranging from 11ºC (52ºF) to 26ºC (79ºF).

  • January has average temperatures of between 0ºC (32ºF) and 9ºC (48ºF). Search for cheap tickets from PWM to LHR sometime then if you'd rather travel in cooler conditions.

Explore more of the United Kingdom

  • London has plenty to offer, but there are so many other corners of the United Kingdom you'll want to see. About 257 kilometres north-west of London, a trip to Manchester will fill your itinerary to the brim. Start with leading sights like 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 journey is complete without seeing Birmingham Museum & Art Gallery, Birmingham Hippodrome Theatre and Bournville Experience.

Plan the rest of your trip from Portland to London

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.