Cheapest return flights from Portland to London in May from 661€

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

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

Return flights

08 May - 11 May Icelandair
13 May - 22 May Delta
19 May - 31 May Icelandair
03 May - 10 May United
14 May - 21 May United
09 May - 16 May United
15 May - 27 May Delta
16 May - 28 May Delta
19 May - 26 May United
08 May - 11 May British Airways direct
30 May - 09 Jun Icelandair
30 May - 08 Jun Icelandair
25 May - 09 Jun Delta
30 May - 08 Jun British Airways direct
29 May - 05 Jun United

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.

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