£363 Find Cheap Flights from London Heathrow Airport to Portland – Compare and Save

Your flight ticket price will generally be cheaper if you fly to Portland on a Tuesday and more expensive on a Monday. On your return trip to London Heathrow Airport, you should consider flying back on a Thursday, and avoid Sundays for better deals.

The cheapest month for flights from London Heathrow Airport to Portland is February, where tickets cost £593 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is £973 and £952 respectively.

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 1 stop stopover the cheapest option at £771 on average.

To get a below average price on the flight from London Heathrow Airport to Portland, you should book around 3 weeks before departure, which saves you about 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

In the past 5 days, the cheapest return tickets from London Heathrow Airport to Portland were found on Scandinavian Airlines (£604) and Air Canada (£627).

There are 4 airlines that fly direct from London Heathrow Airport to Portland. They are: Aer Lingus, American Airlines, British Airways and Finnair. The cheapest price of all airlines flying this route was found with Finnair at £587 for a return flight. On average, the best prices for this route can be found at British Airways.

Weekly flights between London and Portland historically see delays in approximately 19% of cases, with the average delay over the past year being 129 minutes.

Typically, flights leaving in the early afternoon tend to face fewer delays, whereas flights in the early afternoon have historically encountered delays more often.

Statistically, Sunday is the day of the week with the fewest delays on this flight route, while Wednesday has typically experienced more delays than other days.

Based on our data, British Airways have experienced the fewest delays on this route in the past 12 months, with only about 19% of their flights encountering any delays.

Reykjavik (KEF) is the top choice – 45% of KAYAK users who clicked on one-stop flights from London Heathrow Airport to Portland picked an itinerary connecting there.

Flights via Denver (DEN) offer the most affordable fares, with an average price of £497 for a return.

Consider flying via Seattle (SEA) for the shortest journey. The average one-way travel time for flights connecting there is 13h 50m.

If you prefer a quick connection, Denver (DEN) often has the shortest stopovers from London Heathrow Airport to Portland, with an average time of 1h 17m.