Cheapest one-way flights from Portland to London in May from $428

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

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

One-Way flights

12 May Alaska Airlines
18 May Icelandair
28 May WestJet
17 May WestJet
18 May Iberia direct
12 May British Airways direct
31 May WestJet
17 May British Airways direct
28 May British Airways direct
31 May British Airways direct

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

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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