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

Return flights

18 Jun - 02 Jul	Icelandair
17 Jun - 24 Jun	Icelandair
16 Jun - 26 Jun	Icelandair
30 Jun - 06 Jul	Icelandair
12 Jun - 29 Jun	Icelandair
11 Jun - 09 Jul	Icelandair
16 Jun - 26 Jun	British Airways	direct
22 Jun - 29 Jun	Icelandair
22 Jun - 29 Jun	British Airways	direct
20 Jun - 30 Jun	British Airways	direct
07 Jun - 21 Jun	Finnair	direct
21 Jun - 03 Jul	Icelandair
26 Jun - 03 Jul	Icelandair
15 Jun - 27 Jun	American Airlines
11 Jun - 18 Jun	Icelandair
27 Jun - 11 Jul	Icelandair
21 Jun - 03 Jul	British Airways	direct
30 Jun - 06 Jul	British Airways	direct
27 Jun - 11 Jul	British Airways	direct
11 Jun - 09 Jul	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.

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Cheapest return flights from Portland to London in June from $909

Return flights