Cheapest return flights from Portland to London in May from 509€

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

Return flights

04 May - 17 May Icelandair
22 May - 31 May Icelandair
30 May - 07 Jun Icelandair
22 May - 07 Jun Icelandair
02 May - 09 May Alaska Airlines
01 May - 31 May Alaska Airlines
07 May - 30 May Alaska Airlines
29 May - 07 Jun Icelandair
21 May - 13 Jun Sun Country Airlines
24 May - 13 Jun Alaska Airlines

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

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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.

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