Qatar airways, Jet airways go direct to Doha from Delhi; Air India Express, Qatar and jet airways fly directly to Doha from Mumbai.
Travellers can take major international airlines to reach Doha, many flights operate to and from the Doha International Airport.
You can rent cars to drive in the city, but it is not recommended as drivers usually drive speeding their vehicle. Though taking a cab is the most safest option.
Doha is not yet developed as much, hence, no railways exists as of now.
The concept of travelling by bus to Doha is not very common therefore, not much of information is available in this sector.
Ships may enter at the Port of Doha from Saudi Arabia.