Bus
₹210–₹420
2.8h
Train
Ernakulam Jn. C (ERSC)Tatanagar Jn (TATA)
18189 Tatanagar–Alappuzha (Alleppey) Express · 3A · 2160 km
₹3,730–₹4,330
15.8h
Train
Tatanagar Jn (TATA)Howrah Jn (HWH)
12261 Mumbai CST–Howrah AC Duronto Express · 3A · 269 km
₹700–₹830
3.2h
Shared jeep
Howrah JnBalagarh
Shared Sumo/Bolero · 81 km
Shared jeeps leave the stand between 05:00 and 07:00 and then stop for the day. Be early or lose a day.
₹230–₹360
3.5h
Total for 1 traveller: ₹4,870–₹5,940 one way
Does this look right?

