Cheapest one-way flights from Portland to London in March from $269

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
07 Mar Frontier Airlines
02 Mar Frontier Airlines
08 Mar Frontier Airlines
16 Mar Frontier Airlines
15 Mar Frontier Airlines
06 Mar Hawaiian Airlines
24 Mar Icelandair
25 Mar Hawaiian Airlines
08 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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