Cheapest return flights from Portland to London in March from $583

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

Return flights

09 Mar - 13 Mar Icelandair
08 Mar - 18 Mar Air Canada
29 Mar - 14 Apr Air Canada
08 Mar - 19 Mar Lufthansa
29 Mar - 17 Apr Delta
16 Mar - 02 Apr Delta
28 Mar - 05 Apr Icelandair
16 Mar - 02 Apr British Airways direct
23 Mar - 07 Apr Air Canada
29 Mar - 17 Apr American Airlines direct
16 Mar - 01 Apr British Airways
25 Mar - 13 Apr Air Canada
29 Mar - 06 Apr Virgin Atlantic
02 Mar - 11 Mar Lufthansa
06 Mar - 09 Mar Hawaiian Airlines
21 Mar - 30 Mar Air Canada
02 Mar - 11 Mar American Airlines direct
19 Mar - 30 Mar United
05 Mar - 08 Mar British Airways
15 Mar - 22 Mar Air Canada

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

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