Cheapest return flights from Portland to London in March from $701

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

Return flights

29 Mar - 12 Apr Hawaiian Airlines
06 Mar - 09 Mar Alaska Airlines
26 Mar - 03 Apr Icelandair
25 Mar - 01 Apr Alaska Airlines
29 Mar - 14 Apr Hawaiian Airlines
25 Mar - 02 Apr Alaska Airlines
29 Mar - 17 Apr Hawaiian Airlines
25 Mar - 03 Apr Alaska Airlines
29 Mar - 05 Apr Hawaiian Airlines
27 Mar - 04 Apr Alaska Airlines
27 Mar - 03 Apr Alaska Airlines
10 Mar - 21 Mar Icelandair
04 Mar - 10 Mar Alaska Airlines
11 Mar - 22 Mar Alaska Airlines
11 Mar - 14 Mar Alaska Airlines
11 Mar - 21 Mar Alaska Airlines
19 Mar - 23 Mar Alaska Airlines
01 Mar - 09 Mar Aer Lingus
14 Mar - 17 Mar Frontier Airlines
15 Mar - 18 Mar Hawaiian Airlines

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

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