What would be the best (and fastest) way to get from Bagdogra to Kurseong?

I'm flying to Bagdogra and land there at 1 PM and will make a booking for a toy train from Kurseong to Darjeeling that departs from Kurseong at 3 PM. If there's no flight delay, I think I should be able to get there in time but am interested in what would be the fastest way to do it.