Cheapest one-way flights from Portland to London in December from $286

AirHint found the following cheapest one-way flights from Portland (PDX) to London (LHR) in December 2025 (see full year).

One-Way flights

05 Dec Frontier Airlines
07 Dec Frontier Airlines
02 Dec Icelandair
29 Dec Icelandair
13 Dec Icelandair
07 Dec British Airways direct
28 Dec United
05 Dec British Airways direct
26 Dec Air Canada
24 Dec Air New Zealand

Also check the deals for return flights from Portland to London in December.

Powered by

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in London

Cheap car rent in London

Feel free to contact us with any feedback or request another flight research.