Cheapest one-way flights from Portland to London in May from $267

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

AirHint found the following cheapest one-way flights from Portland (PDX) to London (LHR) in May 2025 (see full year).

One-Way flights

12 May Icelandair
14 May Icelandair
21 May Icelandair
13 May Air Canada
20 May Finnair
17 May Hawaiian Airlines
18 May Hawaiian Airlines
16 May Spirit Airlines
24 May Spirit Airlines
22 May Alaska Airlines

Also check the deals for return flights from Portland to London in May.

Skyscanner

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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