Cheapest return flights from Portland to London in May from $567

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

Return flights

11 May - 19 May Icelandair
12 May - 16 May Icelandair
05 May - 14 May Icelandair
07 May - 16 May Icelandair
05 May - 12 May Icelandair
02 May - 16 May Icelandair
12 May - 28 May Icelandair
14 May - 21 May Icelandair
13 May - 21 May Air Canada
13 May - 22 May Air France
10 May - 01 Jun Air Canada
20 May - 12 Jun Icelandair
20 May - 12 Jun American Airlines direct
10 May - 01 Jun Iberia direct
29 May - 05 Jun Icelandair

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

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