Cheapest return flights from Portland to London in May from 498€

AirHint found the following cheapest return flights from Portland (PDX) to London (LHR) in May 2026 (see full year).

Return flights

09 May - 16 May Icelandair
11 May - 19 May Finnair
01 May - 15 May Finnair
11 May - 19 May British Airways direct
12 May - 28 May Delta
15 May - 03 Jun Air Canada
15 May - 03 Jun British Airways direct
30 May - 15 Jun British Airways 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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