Cheapest return flights from Portland to London in May from 948€

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

Return flights

26 May - 09 Jun Air Canada
26 May - 09 Jun British Airways direct
23 May - 06 Jun Air France
23 May - 06 Jun British Airways direct

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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