Cheapest return flights from Portland to London in March from $580

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

Return flights

08 Mar - 19 Mar British Airways
16 Mar - 11 Apr Icelandair
29 Mar - 17 Apr British Airways direct
01 Mar - 15 Mar British Airways direct
16 Mar - 02 Apr Delta
15 Mar - 22 Mar British Airways direct
16 Mar - 02 Apr American Airlines direct
16 Mar - 11 Apr British Airways direct
23 Mar - 06 Apr Iberia direct
11 Mar - 22 Mar Delta
20 Mar - 05 Apr Air Canada
11 Mar - 22 Mar Iberia direct
19 Mar - 04 Apr Air Canada
19 Mar - 23 Mar Icelandair
21 Mar - 29 Mar Air Canada
30 Mar - 02 Apr Icelandair
26 Mar - 02 Apr Icelandair
08 Mar - 28 Mar Finnair
21 Mar - 28 Mar Alaska Airlines

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

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