IGI ( indira gandhi intnl) has 2 terminals-- terminal 1 is for domestic, terminal 2 for international ( includes flights to Saarc countries, I think)--- If you are coming from the US, you will have to leave airport 2 and go to airport 1, which is 7 kms away-- you should find plenty of transportation, and there is a coach service for IC 10 Rs that leaves every 15 mins. The transit sucks if you are going to spend the nite. usually flights from the US arrive late and you either have to go to the city and spend the nite in a hotel, or loiter in the transit lounge. My advice, go online to travelocity or Orbitz, and you will find a cheap decent lodging close to the airport ( found one for 30/nite- 3 star hotel) with luggage, you should have no problems- ditto for immigration also- except you will have to claim it and check it back in the next day.