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

Return flights

07 Oct - 14 Oct	Air Canada
13 Oct - 20 Oct	Air Canada
08 Oct - 15 Oct	Air Canada
06 Oct - 13 Oct	Air Canada
09 Oct - 16 Oct	Air Canada
10 Oct - 17 Oct	Air Canada
12 Oct - 19 Oct	Air Canada
01 Oct - 08 Oct	Air Canada
11 Oct - 18 Oct	Air Canada
03 Oct - 10 Oct	Air Canada

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 398€

Return flights