Cheapest return flights from Phoenix to Bucharest in September from $646

AirHint found the following cheapest return flights from Phoenix (PHX) to Bucharest (OTP) in September 2025 (see full year).

Return flights

10 Sep - 17 Sep Frontier Airlines
11 Sep - 18 Sep Frontier Airlines
18 Sep - 25 Sep Frontier Airlines
03 Sep - 10 Sep British Airways
04 Sep - 11 Sep Frontier Airlines
19 Sep - 26 Sep Frontier Airlines
12 Sep - 19 Sep Frontier Airlines
02 Sep - 09 Sep Air France
09 Sep - 16 Sep Air France
08 Sep - 15 Sep Frontier Airlines
29 Sep - 06 Oct Frontier Airlines
27 Sep - 04 Oct Frontier Airlines
30 Sep - 07 Oct British Airways
28 Sep - 05 Oct Frontier Airlines
26 Sep - 03 Oct Frontier Airlines
30 Sep - 11 Oct British Airways
25 Sep - 02 Oct Air France

Also check the deals for one-way flights from Phoenix to Bucharest in September.

Skyscanner

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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