By plane
Bodh Gaya fields international flights to Bangkok Thailand and Paro Bhutan, catering largely to Buddhist pilgrims. Patna is connected to major Indian cities.
Patna-Gaya-Ranchi air taxi service (http://spiritairindia.com/).
By road
Major National Highways which connect Bihar with other cornor of country are as follows NH 2, 19, 28, 30, 31.
Patna is well conncet by road with all the corner of country, Deluxe bus services are available for following location Ranchi, Jamshedpur, Kolkata, Siliguri & Nepal border.
By train
Bihar is connected by train to all major cities of India. Some good trains to reach the capital Patna are:
From Delhi - Patna Rajdhani Express2309/2310, Sampurna Kranti Exp. overnight journey
From Kolkata - Jan Shatabdi Exp. 8-9 hrs.
From Mumbai - Rajendra Nagar Lokmanya Tilak T. Exp.
From Varanasi - Vibhuti Exp. 6 hrs..