Daman is well connected to other major cities of the country via regular buses. If you're planning to take the flight, the nearest airport is Surat. You need to take a bus from Mumbai to Vapi that starts at approximately INR 1,000 one way i.e. INR 2,000 for a round trip. From Vapi, there are bus and taxi services available from Vapi to Daman.
Reaching Daman From Mumbai
The information in this post might be outdated