Cheapest return flights from Portland to London in March from $726

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

Return flights

05 Mar - 13 Mar Hawaiian Airlines
15 Mar - 22 Mar Icelandair
23 Mar - 07 Apr Icelandair
08 Mar - 16 Mar Hawaiian Airlines
16 Mar - 01 Apr Icelandair
29 Mar - 17 Apr Hawaiian Airlines
23 Mar - 06 Apr Icelandair
22 Mar - 03 Apr Alaska Airlines
08 Mar - 19 Mar Iberia
22 Mar - 05 Apr Icelandair

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

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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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