Runs from: Ratlam Junction (RTM) to Pt. DD Upadhyaya Junction (DDU)
| Halt # | Station Name (Code) | Arrival | Departure | Halt Time | Distance | Day |
|---|---|---|---|---|---|---|
| 1 | Ratlam Junction RTM | Source | 07:02 | - | 0 km | 1 |
| 2 | Nagpur Junction NGP | 07:45 | 10:41 | 13 mins | 189 km | 1 |
| 3 | Kanpur Central CNB | 10:58 | 13:45 | 8 mins | 286 km | 1 |
| 4 | Warangal WL | 13:04 | 14:48 | 10 mins | 505 km | 1 |
| 5 | Vadodara Junction BRC | 14:52 | 16:37 | 8 mins | 654 km | 1 |
| 6 | Pt. DD Upadhyaya Junction DDU | 16:15 | 19:13 | 11 mins | 879 km | 1 |
Train 66604, named the Patna - Dehradun Mail Mail Express, is a premium Mail Express operated by Indian Railways. It connects the key terminal stations of Ratlam Junction (RTM) and Pt. DD Upadhyaya Junction (DDU), covering a total distance of 879 km during its journey.
This train runs on Mon, Tue, Wed, Thu, Fri, Sat, Sun. It features comfortable seating and sleeping options across multiple travel classes including 2A, 3A, SL, 2S. With a total of 6 scheduled stops along the route, passengers can check accurate station arrival/departure times, exact halt durations, and distance markers in the timetable above to plan their journeys efficiently.