Cheapest return flights from Portland to London in December from $878

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

Return flights

31 Dec - 07 Jan Lufthansa
28 Dec - 12 Jan Brussels Airlines
29 Dec - 01 Jan Air Canada
28 Dec - 05 Jan Air Canada
31 Dec - 07 Jan Finnair direct
28 Dec - 04 Jan KLM
28 Dec - 12 Jan British Airways direct
29 Dec - 04 Jan Air France
28 Dec - 03 Jan Air Canada
28 Dec - 05 Jan Finnair direct

Also check the deals for one-way flights from Portland to London in December.

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