AirHint found the following cheapest return flights from Portland (PDX) to London (LHR) in January 2026 (see full year).

Return flights

14 Jan - 21 Jan	Iberia	direct
14 Jan - 20 Jan	British Airways
13 Jan - 20 Jan	Iberia
19 Jan - 26 Jan	Iberia
14 Jan - 28 Jan	Air France
12 Jan - 18 Jan	British Airways	direct
18 Jan - 25 Jan	British Airways	direct
15 Jan - 21 Jan	British Airways
14 Jan - 07 Feb	British Airways
13 Jan - 07 Feb	Iberia
05 Jan - 31 Jan	Virgin Atlantic
06 Jan - 31 Jan	Virgin Atlantic
19 Jan - 14 Feb	Virgin Atlantic

Also check the deals for one-way flights from Portland to London in January.

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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Cheapest return flights from Portland to London in January from $547

Return flights