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

Return flights

01 Jun - 14 Jun	Icelandair
01 Jun - 14 Jun	British Airways	direct
01 Jun - 30 Jun	Icelandair
01 Jun - 30 Jun	British Airways	direct
17 Jun - 29 Jun	Alaska Airlines
23 Jun - 18 Jul	Air Canada
13 Jun - 04 Jul	Air Canada
23 Jun - 18 Jul	British Airways	direct
17 Jun - 29 Jun	British Airways	direct
13 Jun - 04 Jul	British Airways	direct

Also check the deals for one-way flights from Portland to London in June.

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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Cheapest return flights from Portland to London in June from $781

Return flights