AirHint found the following cheapest return flights from Portland (PDX) to London (LHR) in November 2025 (see full year).

Return flights

25 Nov - 03 Dec	Icelandair
25 Nov - 09 Dec	Icelandair
17 Nov - 07 Dec	Icelandair
16 Nov - 16 Dec	KLM
16 Nov - 23 Nov	British Airways
15 Nov - 22 Nov	Icelandair
24 Nov - 07 Dec	Icelandair
24 Nov - 07 Dec	British Airways	direct
12 Nov - 06 Dec	Virgin Atlantic
29 Nov - 08 Dec	Air Canada
19 Nov - 13 Dec	Virgin Atlantic
29 Nov - 20 Dec	Virgin Atlantic
26 Nov - 30 Nov	Lufthansa
18 Nov - 30 Nov	Air France

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

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 November from $490

Return flights