Indian Tourist traveling to Bhutan does not require visa. However they need a travel Permit and Route Permit to visit Bhutan.
Indian, Bangladesh and Maldives nationals can obtain a permit at the point of entry on producing a valid passport with a minimum of 6 months validity (Indian nationals may also use their Voters Identity Card (VIC)).
Indian travelers wishing to visit Bhutan need to carry either
(a) Passport, having validity of minimum 6 months OR
(b) Voter Identity Card, issued by Election Commission of India. The accompanying children can also travel with birth certificate (reflecting name of the child) along with School ID card and a letter from School Principal.
The Entry permit, issued free of charge by Department of Immigration, Royal Government of Bhutan on arrival at Paro airport OR if entering Bhutan by surface via Phuentsholing then it is issued at this border town.
Bhutan has two types of PERMIT
Entry Permit: When you are entering Bhutan, you have to get the Entry Permit which can be procured at the entry point either in Paro airport (when travelling by flight) or in Phuentsholing Bhutan (when travelling overland). Entry permit cannot be made in advance as physical appearance is required at the immigration office. The immigration office is open from 09.00 – 16:00 in weekdays (closed on Saturdays, Sunday and Bhutan public holidays). Entry permit is also a valid document to visit Thimphu and Paro.
Route Permit: If you choose your Itinerary to visit places (Punakha, Wangdue, Bumthang, etc) beyond Paro and Thimphu, you need to have a Route Permit. We need the scanned copy of either your passport or Voter ID card to make your Route Permit in advance. Route permit will only be made in Thimphu on the working days between 09.00 – 11.00 hrs.
Note- Bhutan standard Time is 30 minutes ahead of IST.
Issuing Bhutan Entry Permit for Indian with Passport holders and Voter ID card
Passport Holder: Bhutan entry permit are stamped on the passport itself. It is must to carry your passport while traveling & taking inter point connection. You will not be allowed to leave the country without stamping the exit on it.
Voter ID card: Bhutan entry permit are issued separately on papers after verifying Voter ID card. This document must be carried while traveling & taking inter point connection. You are also advised to make photo copy of the paper permit and keep it in safe custody as you will not be allowed to leave the country without surrendering this paper permit in original. This permit is also required to make the pink permit for visiting any other area other than Thimphu & Paro.
Tourist can enter Bhutan by Air and Land
Entering Bhutan by Air
Royal Bhutan Airlines and Drukair have International flights from Bangkok, Singapore, Kathmandu, Kolkata, Gaya, Bagdogra, Guwahati, Delhi, and Dhaka.
https://www.drukair.com.bt/
http://www.bhutanairlines.bt/
Entering Bhutan by Land
There are 3 points to enter into Bhutan via Land
1) Phuntsholing (western Bhutan) is border town in southern Bhutan and is the administrative seat of Chukha District.Phuentsholing adjoins the Indian town of Jaigaon, and cross-border trade has resulted in a thriving local economy.
2) Gelephu (Central Bhutan) is located on the Indian border, about 30 km to the east of Sarpang, the Dzongkhagheadquarters
3) SamdrupJongkhar (Eastern Bhutan) is a town and seat of SamdrupJongkhar District in Bhutan. The town is located at the south-eastern part of Bhutan and borders the Indian state of Assam
All the above entry points follow same process to issue the entry permit in Bhutan
Leaving Bhutan by Land
While leaving Bhutan from Phuentsholing you will have to surrender original entry permit which was given to you while entering Bhutan at immigration office, Karbandi, which is 5 km before Phuentsholing. You will not be allowed to leave the country without surrendering this paper permit in original, issued at Paro /Phuntsholing.