BY RAIL
Though the nearest railway station is Cooch Behar, it is recommended to use NJP (New Jalpaiguri) as your railhead. Almost all trains to North East pass though NJP railway station.. 

From Kolkata - The Darjeeling Mail, Kunchenjunga Express, Uttar-Banga Express, Teesta-Torsa
                       Express.
From New Delhi - Rajdhani Mail, Brahmaputra Express among others will bring you to the NJP.
                          
Phaskowa 3 ½ hours drive from Siliguri. 

BY AIR  
Nearest airport is Bagdogra. This airport has been recently revamped & has the best of facilities that can be found at a small airport. Indian Airlines & Jet fly from Kolkata ( 45 mins ) & Delhi ( 2 hours ) to Bagdogra. 

Phaskowa is a 4 hour-drive. Start from Siliguri through Teesta - Kalimpong route, via Coronation Bridge road, passing through Malbazar, Chalsa, Nagrakata, by the side of the Teesta River. It is a picturesque and enjoyable drive. In winters you can go through the Buxa and Jayanti forest reserves before reaching Phaskowa.