The cheapest way to the airport. Nothing listed is quicker.
Metro M4
M4 · ATMPickup, hours & luggage
Boards at. San Babila station, on the M4 platforms
The ordinary Mi1-Mi3 ticket, EUR 2.20, covers 90 minutes of unlimited rides, including changing lines through the gates. No airport supplement. Children under 14 travel free with ID. Day ticket EUR 7.60, three days EUR 15.50, carnet of ten EUR 19.50. A tapped bank card or phone pays the same fare and caps at the day rate from the fourth ride.
Luggage. Carried free. ATM's current metro rules refuse only items over 90 cm on any side at the gates and mention no charge; a 2007 company regulation still on ATM's site asks for a ticket for a case over 50 cm, and the current rules do not repeat it.
Hours. Monday to Friday; 05:57 first and the same 00:36 last on Saturday, 06:17 first on Sunday and holidays. Every 1 to 6 minutes by day.