Cheapest return flights from Portland to London in May from $693

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

01 May - 22 May Air Canada
03 May - 17 May jetBlue
04 May - 11 May Icelandair
01 May - 21 May Air Canada
01 May - 21 May British Airways direct
01 May - 22 May British Airways direct
04 May - 11 May British Airways direct
06 May - 20 May Air Canada
03 May - 17 May British Airways direct
13 May - 20 May United
13 May - 03 Jun Air Canada
13 May - 03 Jun British Airways direct
07 May - 07 Jun Icelandair
28 May - 19 Jun Icelandair
25 May - 20 Jun Icelandair
25 May - 09 Jun Icelandair
07 May - 07 Jun British Airways direct
25 May - 20 Jun British Airways direct
28 May - 19 Jun British Airways direct
25 May - 09 Jun Iberia direct

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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