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

Return flights

08 Nov - 15 Nov	Icelandair
20 Nov - 30 Nov	Icelandair
03 Nov - 10 Nov	Icelandair
18 Nov - 25 Nov	United
09 Nov - 16 Nov	Air Canada
03 Nov - 10 Nov	British Airways	direct
28 Nov - 05 Dec	British Airways	direct
09 Nov - 16 Nov	American Airlines	direct
13 Nov - 20 Nov	United
23 Nov - 30 Nov	United
21 Nov - 01 Dec	Air Canada
23 Nov - 30 Nov	British Airways	direct
21 Nov - 01 Dec	British Airways	direct

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 $499

Return flights