AC Express (Indian Railways)
AC Express trains are fully air-conditioned Superfast Express trains linking major cities in India. They have high priority and are among the fastest trains in India. Though some trains travel at 130 km/h at some sections, most of them are restricted to speed of 110 km/h. The food is not free in this trains but the bedroll is free for passengers who are traveling by AC Express. The charges of this trains are cheaper than Rajdhani Express, Duronto Express and Humsafar Express also. Some of the AC Express trains have pantry car for required to passengers.
Routes
The following AC Express Trains have been operated:| Sr no. | Train No. | Name | Frequency |
| 1 | 12551/12552 | Yesvantpur - Kamakhya AC SF Express | 1 |
| 2 | 14805/14806 | Yesvantpur - Barmer AC Express | 1 |
| 3 | 22677/22678 | Yesvantpur - Kochuveli AC Express | 1 |
| 4 | 12171/12172 | Lokmanya Tilak Terminus Haridwar AC Superfast Express | 2 |
| 5 | 12401/12402 | Nanda Devi AC Express | 7 |
| 6 | 12493/12494 | Darshan Express | 1 |
| 7 | 12519/12520 | Lokmanya Tilak Terminus - Kamakhya AC Express | 1 |
| 8 | 12773/12774 | Shalimar - Secunderabad AC Superfast Express | 1 |
| 9 | 12775/12776 | Cocanada AC Express | 3 |
| 10 | 12783/12784 | Visakhapatnam - Secunderabad AC SF Express | 1 |
| 11 | 12847/12848 | Howrah Digha Super AC Express | 7 |
| 12 | 22109/22110 | Lokmanya Tilak Terminus Hazrat Nizamuddin AC Express | 1 |
| 13 | 22115/22116 | Lokmanya Tilak Terminus - Karmali AC Superfast Express | 1 |
| 14 | 22117/22118 | Pune - Amravati AC Superfast Express | 1 |
| 15 | 22121/22122 | Lokmanya Tilak Terminus - Lucknow AC SF Express | 1 |
| 16 | 22123/22124 | Pune - Ajni AC Superfast Express | 1 |
| 17 | 22125/22126 | Nagpur - Amritsar AC Superfast Express | 1 |
| 18 | 22207/22208 | Chennai Thiruvananthapuram AC Superfast Express | 2 |
| 19 | 22309/22310 | Howrah New Jalpaiguri AC Express | 1 |
| 20 | 22401/22402 | Delhi Sarai Rohilla Udhampur AC Superfast Express | 3 |
| 21 | 22411/22412 | Arunachal AC Superfast Express | 1 |
| 22 | 22461/22462 | Shri Shakti Express | 7 |
| 23 | 22631/22632 | Anuvrat AC Superfast Express | 1 |
| 24 | 22475/22476 | Hisar - Coimbatore SF AC Express | 1 |
| 25 | 22807/22808 | Santragachi Chennai Central AC Express | 2 |
| 26 | 22837/22838 | Dharti Aaba AC Superfast Express | 1 |
| 27 | 22863/22864 | Howrah - Yesvantpur AC Superfast Express | 1 |
| 28 | 22903/22904 | Bandra Terminus Bhuj AC Superfast Express | 3 |
| 29 | 12429/12430 | Lucknow–New Delhi AC Superfast Express | 7 |
| 30 | 20601/20602 | Chennai Central Madurai AC Superfast Express | 1 |
| 31 | 18633/18634 | Patna Ranchi AC Express | 1 |