Indira Gandhi International Airport is about 14km southwest of the centre. International and domestic flights use Terminal 3. Ageing Terminal 1 is reserved for low-cost carriers. Free shuttle buses (present your boarding pass and onward ticket) run between the two terminals every 20 minutes, but can take a while. Leave at least three hours between transfers to be safe.
The airport is linked to the city centre via the metro, local buses and official pre-paid taxis.