The journey from Supaul to Guwahati is about 650 kilometers. The most practical way to travel is by train, which takes about 15 to 18 hours. You may need to change trains at major junctions like Katihar. Road travel is also possible but takes much longer.
Total Distance: 650 km by road, 550 km air distance.
Book tickets well in advance.
October to March for pleasant weather in Guwahati.