Malahide will take you at least 15 minutes from M1 - rush hour, schools and then you have to park in DART Car park.
Airside will take about 5 mins from M1 (even though you pass within 1 minute of it - the off ramps don't allow for direct access approaching from or going North).
Easiest way is to get off M1 heading for Airport and head North towards Swords from Airport roundabout - Airside is about 1 Mile from Airport roundabout.
Not sure where you are coming from exactly - I get the 33X from Skerries/Lusk it goes through the Port tunnel - I get the bus at 7.20 (Lusk) and arrive at St Stephens Green at 8.15 approx There is a later bus I have gotten a couple of times at 7.40 arrives in St Stephens green approx 8.40 drops along the quays, College Green, Trinity, Dawson St and Stephens Green
Malahide will take you at least 15 minutes from M1 - rush hour, schools and then you have to park in DART Car park.
Airside will take about 5 mins from M1 (even though you pass within 1 minute of it - the off ramps don't allow for direct access approaching from or going North).
Easiest way is to get off M1 heading for Airport and head North towards Swords from Airport roundabout - Airside is about 1 Mile from Airport roundabout.