Cheapest return flights from Portland to London in May from $603

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
12 May - 20 May Icelandair
02 May - 09 May Spirit Airlines
18 May - 01 Jun Hawaiian Airlines
21 May - 14 Jun Icelandair
19 May - 23 May Air Canada
22 May - 14 Jun Frontier Airlines
19 May - 01 Jun Hawaiian Airlines
19 May - 21 May Icelandair
10 May - 17 May TAP

Also check the deals for one-way 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.

Book a cheap hotel in London

Cheap car rent in London