India's major international airports are Mumbai (Bombay), Delhi, Kolkata (Calcutta) and Chennai (Madras); there are other international airports at Ahmedabad, Amritsar, Bangalore and Kochi. Delhi is the cheapest place to buy air tickets in India, followed by Kolkata and Mumbai. International flights to neighbouring countries can be very cheap, especially between Kolkata and Dhaka (Bangladesh), Delhi and Karachi (Pakistan) and Tiruchirappalli and Colombo (Sri Lanka). The departure tax on flights to Pakistan, Sri Lanka, Bangladesh and Nepal is approximately 5.00, but to other countries it's 10.00.

The most popular overland routes between India and Nepal are Birganj-Raxaul Bazaar, Sunauli-Bhairawa and Kakarbhitta-Siliguri. If you're heading from Kathmandu or Pokhara to Delhi or elsewhere in northwestern India, then Sunauli is the most convenient entry point; to reach Kolkata or most of eastern India, Birganj is the best place to cross the border; and to get to Darjeeling, it's easiest to go via Kakarbhitta. It's fairly easy to travel between Kolkata and Dhaka overland. The only border crossing currently open between India and Pakistan is at Attari between Lahore and Amritsar. This and all other border crossings are by road only.