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

Return flights

15 Jun - 24 Jun	Icelandair
16 Jun - 23 Jun	Icelandair
01 Jun - 30 Jun	Air France
24 Jun - 01 Jul	Icelandair
25 Jun - 09 Jul	Alaska Airlines
15 Jun - 07 Jul	Air Canada
20 Jun - 29 Jun	Icelandair
22 Jun - 06 Jul	Icelandair
01 Jun - 30 Jun	Finnair	direct
22 Jun - 06 Jul	Finnair	direct
15 Jun - 24 Jun	Finnair	direct
16 Jun - 23 Jun	Finnair	direct
20 Jun - 29 Jun	Finnair	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.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Portland to London in June from 714€

Return flights