AirHint found the following cheapest return flights from Rotterdam (RTM) to Rome (FCO) in September 2025 (see full year).

Return flights

21 Sep - 23 Sep	transavia	direct
16 Sep - 23 Sep	transavia	direct
28 Sep - 30 Sep	transavia	direct
04 Sep - 11 Sep	transavia	direct
02 Sep - 09 Sep	transavia	direct
18 Sep - 25 Sep	transavia	direct
07 Sep - 11 Sep	transavia	direct
04 Sep - 12 Sep	transavia	direct
05 Sep - 11 Sep	transavia	direct
04 Sep - 05 Sep	transavia	direct
18 Sep - 21 Oct	transavia
19 Sep - 23 Oct	transavia	direct
25 Sep - 05 Oct	transavia
18 Sep - 21 Oct	transavia	direct
19 Sep - 05 Oct	transavia	direct

Also check the deals for one-way flights from Rotterdam to Rome in September.

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 Rotterdam to Rome in September from $153

Return flights