From Ciampino Airport:
Shuttle bus to Anagnina Subway Station, € 1
Subway Line A (red) get off at Flaminio-Piazza del Popolo stop.
Bus #2 get off at Apollodoro stop.
Taxi - from € 45, depending on traffic
B&B's Shuttle: € 29
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From Fiumicino Airport:
Light train to Termini Station, € 11 / person
Taxi - from € 45, depending on traffic
B&B's Shuttle (on request): € 29
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From Termini Station:
Subway Line A (red) get off at Flaminio-Piazza del Popolo stop.
Bus #2 get off at Apollodoro stop.
B&B's Shuttle (on request): € 10