Portland to London
Portland to London is cheapest in October. April, the most expensive month we measured, costs about 393 € more.
Portland to London is 7,886 km flown direct. Every fare we measured came from WS.
That comes from pricing 292 departure dates across 11 months. Every figure below is a fare we measured on the day shown, not a live quote. When we have nothing fresh to say about a route, its page stops existing.
What is a good price from Portland to London?
Anything at or below the quarter mark beats three in four of the 292 one-way fares we measured here. Above the median, wait or move the date.
seen 25 Sep 2026
How far ahead do the cheap fares sit?
When we measured, the cheapest quarter of fares sat between 127 and 269 days before departure, noticeably further out than the rest of the market. If you can look a few months ahead, that is where the cheap seats are sitting.
a snapshot of where the cheap seats sat, seen 25 Sep 2026
Which day of the week is cheapest?
On average, Wednesday departures came out lowest and Monday highest, a spread of about 131 €. The day matters less than the month here: pick the month first, then the day.