By air. Indira Gandhi International Airport (DEL) is India's busiest airport and the country's principal international gateway, roughly 16 km southwest of central Delhi. It has three terminals — Terminal 3 handles most international and many domestic flights, Terminal 1 handles domestic low-cost carriers, and Terminal 2 handles additional domestic traffic. Free inter-terminal shuttles run, but allow time, as the terminals are not close together.
Getting into the city:
By train. Delhi is India's largest rail hub, with four major stations:
Fast, comfortable trains connect Delhi to Agra (Gatimaan and Shatabdi services, around 100 minutes), Jaipur, Amritsar, Lucknow, Varanasi and Chandigarh. Book through IRCTC well in advance for good classes.
By road. Delhi is the hub of India's national highway network. Three main interstate bus terminals operate: Kashmere Gate ISBT (the largest, serving north and west), Anand Vihar ISBT (east) and Sarai Kale Khan ISBT (south).
The Yamuna Expressway to Agra and the Delhi–Meerut Expressway have cut journey times considerably. Agra is around 3–4 hours by road, Jaipur around 5 hours, Chandigarh around 4–5 hours.