Cheapest return flights from Portland to London in May from $715

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

Return flights

20 May - 12 Jun Icelandair
20 May - 27 May Icelandair
01 May - 04 May Air Canada
10 May - 24 May Lufthansa
09 May - 24 May Icelandair
10 May - 24 May British Airways direct
20 May - 12 Jun American Airlines direct
05 May - 25 May KLM
31 May - 07 Jun Icelandair
21 May - 28 May Icelandair
26 May - 02 Jun Icelandair
16 May - 23 May Icelandair

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

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