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

Return flights

12 Jun - 19 Jun	Icelandair
02 Jun - 08 Jun	Air Canada
02 Jun - 08 Jun	British Airways	direct
16 Jun - 26 Jun	Air Canada
15 Jun - 23 Jun	Air Canada
05 Jun - 13 Jun	British Airways	direct
17 Jun - 24 Jun	Air Canada
08 Jun - 22 Jun	Air Canada
11 Jun - 09 Jul	Air Canada
01 Jun - 11 Jul	Air Canada
27 Jun - 07 Jul	Air Canada
20 Jun - 30 Jun	Air Canada
11 Jun - 18 Jun	Icelandair
26 Jun - 03 Jul	Icelandair
11 Jun - 12 Jul	Air Canada
25 Jun - 01 Jul	Air Canada
30 Jun - 06 Jul	Air Canada
30 Jun - 05 Jul	Air Canada
25 Jun - 01 Jul	British Airways	direct
30 Jun - 05 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 713€

Return flights