What is the cheapest month to fly from London to Portland?

Based on current 6-month forward fare data, October 2026 is the cheapest month to fly from London (LHR) to Portland (PDX), with fares starting from $521.

What is the lowest current fare from LHR to PDX?

The lowest currently-listed fare from London (LHR) to Portland (PDX) is $521 on 2026-10-07.

How long is the flight from London to Portland?

Direct flights from LHR to PDX cover approximately 7,886 km (4,900 miles), with an estimated flight time of 9h 17m. Operating airlines: BA.

Cheap flights from London to Portland

Cheapest current fares: $521 in October 2026, 7,886 km direct flight in ~9h 17m.

Last updated August 11, 2026 · By Flightmaps Editorial

Cheapest month-by-month fares

Lowest available fare per calendar month from London (LHR) to Portland (PDX). Refreshed daily.

London (LHR) → Portland (PDX)

October 2026 $521
December 2026 $581
August 2026 $662

Frequently asked questions

What is the cheapest month to fly from London to Portland?

Based on current 6-month forward fare data, October 2026 is the cheapest month to fly from London (LHR) to Portland (PDX), with fares starting from $521.
What is the lowest current fare from LHR to PDX?

The lowest currently-listed fare from London (LHR) to Portland (PDX) is $521 on 2026-10-07.
How long is the flight from London to Portland?

Direct flights from LHR to PDX cover approximately 7,886 km (4,900 miles), with an estimated flight time of 9h 17m. Operating airlines: BA.

Related guides for this route

Sibling pages — full route detail, airport overviews, visa context, per-airline routes.