Cheapest return flights from Portland to London in August from $566

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

Return flights

21 Aug - 04 Sep Icelandair
21 Aug - 28 Aug Icelandair
21 Aug - 05 Sep Icelandair
11 Aug - 18 Aug Icelandair
01 Aug - 08 Aug Icelandair
06 Aug - 13 Aug Icelandair
03 Aug - 10 Aug Virgin Atlantic
01 Aug - 11 Aug British Airways direct
21 Aug - 28 Aug Aer Lingus direct
03 Aug - 10 Aug British Airways direct

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

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