Hop on one of the green and yellow shuttle buses pull up in front of the airport every 20mins. Buy a 15zł ticket that covers both the shuttle and train fare. The shuttle will take you 10 minutes to the Modlin Mazowieckie Train stop. Trains leave every hour and take 45-60 mins. The earliest train departure for Centralna is 04:21 (from Centralna it's 04:20), while the last is at 22:19 (the last from Centralna to Modlin is at 22:15). For the latest schedule information visit www.mazowieckie.com.pl/en. Note that we've heard horror stories about transfers purchased via the airlines - namely no-show buses - so buyer beware.