Cheapest return flights from Portland to London in May from 542€

AirHint found the following cheapest return flights from Portland (PDX) to London (LHR) in May 2026 (see full year).

Return flights

06 May - 15 May Delta
02 May - 09 May Delta
04 May - 11 May Icelandair
06 May - 15 May Finnair direct
21 May - 13 Jun Air Canada
21 May - 13 Jun British Airways direct
24 May - 13 Jun Air Canada
24 May - 13 Jun British Airways direct
24 May - 31 May Icelandair
14 May - 21 May Icelandair
09 May - 16 May Icelandair

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

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