AirHint found the following cheapest return flights from Indianapolis (IND) to Amsterdam (AMS) in September 2025 (see full year).

Return flights

15 Sep - 30 Sep	Spirit Airlines
09 Sep - 16 Sep	United
14 Sep - 21 Sep	United
19 Sep - 23 Sep	Frontier Airlines
16 Sep - 23 Sep	United
24 Sep - 01 Oct	United
30 Sep - 07 Oct	United
17 Sep - 24 Sep	United
04 Sep - 11 Sep	United
05 Sep - 12 Sep	United
11 Sep - 18 Sep	United
13 Sep - 20 Sep	United
26 Sep - 03 Oct	United
28 Sep - 05 Oct	United
29 Sep - 06 Oct	United

Also check the deals for one-way flights from Indianapolis to Amsterdam 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 Indianapolis to Amsterdam in September from 609€

Return flights