Cheapest return flights from St. Louis to Rome in September from $553

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

Return flights

16 Sep - 23 Sep Air Canada
16 Sep - 16 Oct Air France
09 Sep - 16 Sep United
30 Sep - 07 Oct United
15 Sep - 22 Sep United
02 Sep - 09 Sep United
23 Sep - 12 Oct Air Canada
04 Sep - 11 Sep United
06 Sep - 13 Sep United
24 Sep - 01 Oct United
18 Sep - 25 Sep United
21 Sep - 28 Sep United
27 Sep - 04 Oct United
12 Sep - 19 Sep United
19 Sep - 01 Oct United

Also check the deals for one-way flights from St. Louis to Rome 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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