Cheapest return flights from Portland to London in May from $588

Best time to book flights for Portland (PDX) to London (LGW) flights at AirHint

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

Return flights

05 May - 20 May Icelandair
08 May - 15 May Icelandair
17 May - 23 May Hawaiian Airlines
05 May - 25 May Icelandair
14 May - 21 May Alaska Airlines
18 May - 25 May Hawaiian Airlines
13 May - 20 May Icelandair
24 May - 02 Jun Alaska Airlines
01 May - 08 May Icelandair

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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