Chitwan can be easily reached by bus from major cities of Nepal like Kathmandu, Pokhara and Lumbini. There are facilities of several Tourist Bus services to and from Chitwan. Buses are also available directly from all entry points from India.
You can also get to Chitwan National park by rafting on the Trishuli River.
By air it just take 25 minutes to reach Bharatpur Airport from Kathmandu and 20 minutes from Pokhara. Then it takes a drive of approx 25 min to reach the lodge from the airport.