Cheapest one-way flights from Portland to London in March from $275

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

One-Way flights

01 Mar Air Canada
16 Mar Icelandair
07 Mar Icelandair
15 Mar Frontier Airlines
06 Mar Frontier Airlines
03 Mar Air Canada
16 Mar British Airways direct
01 Mar British Airways direct
15 Mar British Airways direct
06 Mar British Airways direct

Also check the deals for return 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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