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

Return flights

29 Oct - 05 Nov	British Airways
22 Oct - 29 Oct	Lufthansa
14 Oct - 08 Nov	Lufthansa
15 Oct - 15 Nov	Lufthansa
22 Oct - 15 Nov	Air Canada
08 Oct - 15 Oct	British Airways
14 Oct - 21 Oct	British Airways
15 Oct - 22 Oct	British Airways
12 Oct - 01 Nov	Air Canada
24 Oct - 31 Oct	Lufthansa
16 Oct - 23 Oct	Lufthansa
26 Oct - 02 Nov	British Airways
27 Oct - 22 Nov	British Airways
27 Oct - 03 Nov	KLM
31 Oct - 07 Nov	British Airways
07 Oct - 14 Oct	British Airways
09 Oct - 16 Oct	British Airways
13 Oct - 20 Oct	British Airways
20 Oct - 27 Oct	Delta

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

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 Bucharest in October from $563

Return flights