£222 Find Cheap Flights from Portland to London Heathrow Airport – Compare and Save

If your flying dates are flexible, you should consider flying to London Heathrow Airport on a Monday, as we generally find the cheapest rates on that day for this route. On the other hand, Wednesday is the most expensive day to fly from Portland to London Heathrow Airport. For your return ticket, we recommend flying on a Friday and avoiding Mondays for the best deals.

The cheapest month for flights from Portland to London Heathrow Airport is February, where tickets cost £518 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £996 and £961 respectively.

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 2 stops stopover the cheapest option at £492 on average.

To get a below average price on the flight from Portland to London Heathrow Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

In the past 5 days, the cheapest return tickets from Portland to London Heathrow Airport were found on SWISS (£669) and Delta (£671).

There is just one airline that flies from Portland to London Heathrow Airport direct and that is British Airways. The best return deal found from British Airways for the route is £455.

Seattle (SEA) is the top choice – 40% of KAYAK users who clicked on one-stop flights from Portland to London Heathrow Airport picked an itinerary connecting there.

Flights via Reykjavik (KEF) offer the most affordable fares, with an average price of £335 for a return.

Consider flying via Amsterdam (AMS) for the shortest journey. The average one-way travel time for flights connecting there is 11h 55m.

If you prefer a quick connection, Amsterdam (AMS) often has the shortest stopovers from Portland to London Heathrow Airport, with an average time of 1h 18m.

There are 2 cabin class options for the route. These are Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

There is a maximum of 1 direct flight a day that takes off from Portland and lands in London Heathrow Airport, with an average flight time of 9h 30m. The most common departure time is 19:00 and most flights take off in the evening. Each week, there are 7 flights.