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

Return flights

02 Jun - 30 Jul	Delta
17 Jun - 29 Jun	WestJet
11 Jun - 25 Jun	WestJet
11 Jun - 25 Jun	British Airways	direct
23 Jun - 18 Jul	Air Canada
25 Jun - 09 Jul	Air Canada
21 Jun - 11 Jul	Air Canada
04 Jun - 11 Jun	Icelandair
26 Jun - 12 Jul	Air Canada
25 Jun - 09 Jul	British Airways	direct
21 Jun - 11 Jul	British Airways	direct
26 Jun - 12 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 849€

Return flights