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

Return flights

15 Sep - 21 Sep	easyJet
08 Sep - 19 Sep	easyJet	direct
15 Sep - 18 Sep	easyJet	direct
15 Sep - 17 Sep	easyJet	direct
17 Sep - 20 Sep	easyJet	direct
29 Sep - 04 Oct	easyJet	direct
22 Sep - 26 Sep	easyJet	direct
08 Sep - 11 Sep	easyJet	direct
08 Sep - 13 Sep	easyJet	direct
13 Sep - 19 Sep	easyJet	direct
29 Sep - 03 Oct	easyJet	direct
10 Sep - 17 Sep	easyJet	direct
30 Sep - 13 Oct	easyJet
30 Sep - 03 Oct	easyJet
30 Sep - 06 Oct	easyJet
30 Sep - 06 Oct	KLM	direct
30 Sep - 03 Oct	KLM	direct
30 Sep - 13 Oct	KLM	direct
27 Sep - 04 Oct	easyJet	direct
27 Sep - 01 Oct	easyJet

Also check the deals for one-way flights from Basel 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 Basel to Amsterdam in September from 101€

Return flights