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

Best time to book flights for Portland (PDX) to London (LGW) flights at AirHint

AirHint found the following cheapest one-way flights from Portland (PDX) to London (LGW) in March 2025 (see full year).

One-Way flights

15 Mar Spirit Airlines
29 Mar Spirit Airlines
17 Mar Spirit Airlines
22 Mar Frontier Airlines
16 Mar Alaska Airlines
18 Mar Spirit Airlines
12 Mar Spirit Airlines
19 Mar Spirit Airlines
13 Mar Alaska Airlines
14 Mar Alaska Airlines

Also check the deals for return flights from Portland to London in March.

Skyscanner

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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