Cheapest return flights from Portland to London in October from $541

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

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

Return flights

08 Oct - 18 Oct Icelandair
23 Oct - 04 Nov Icelandair
28 Oct - 04 Nov Icelandair
24 Oct - 03 Nov Icelandair
25 Oct - 03 Nov Air Canada
26 Oct - 03 Nov Air Canada
04 Oct - 08 Oct Icelandair
02 Oct - 09 Oct British Airways direct
17 Oct - 24 Oct United
08 Oct - 18 Oct American Airlines direct
27 Oct - 03 Nov United
27 Oct - 03 Nov British Airways direct
24 Oct - 03 Nov American Airlines direct
31 Oct - 30 Nov Delta
31 Oct - 30 Nov British Airways direct
04 Oct - 08 Oct American Airlines direct

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

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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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