Cheapest return flights from Portland to London in March from $546

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 Air Canada
03 Mar - 08 Mar Air Canada
04 Mar - 09 Mar Air Canada
04 Mar - 08 Mar Air Canada
04 Mar - 08 Mar British Airways direct
04 Mar - 09 Mar British Airways direct
11 Mar - 15 Mar British Airways direct
15 Mar - 22 Mar British Airways direct
08 Mar - 15 Mar British Airways direct
12 Mar - 16 Mar Scandinavian Airlines
29 Mar - 12 Apr British Airways direct
27 Mar - 18 Apr Air Canada
16 Mar - 02 Apr American Airlines direct
27 Mar - 18 Apr British Airways direct

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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