New Delhi, April 24 -- India's international air travel fell to a four-year low in March as the West Asia conflict disrupted key routes, with Air India Express emerging as the worst-hit among local carriers.

The low-cost carrier of Air India, which has a heavy exposure to the region, recorded the steepest decline. Its departures plunged 68% to 1,263 in March from 3,928 a year ago. Passenger traffic fell 66% to 169,000 from 496,000, underscoring the airline's reliance on Gulf routes.

Air India Express, which has 17 overseas destinations including Dubai, Doha, Abu Dhabi and Sharjah, has not said if it is redeploying under-utilized aircraft on other routes.

International departures at InterGlobe Aviation Ltd, the operator of IndiGo, the c...