Cheapest return flights from Portland to London in March from $788

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

Return flights

06 Mar - 15 Mar Alaska Airlines
05 Mar - 14 Mar Hawaiian Airlines
15 Mar - 04 Apr Icelandair
29 Mar - 17 Apr Hawaiian Airlines
29 Mar - 18 Apr Icelandair
20 Mar - 24 Mar Alaska Airlines
21 Mar - 29 Mar Icelandair
22 Mar - 30 Mar Hawaiian Airlines
20 Mar - 11 Apr Air Canada
20 Mar - 28 Mar Air Canada

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

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