Are there nonstop flights from Chennai (MAA) to Jammu (IXJ)?

Yes. IndiGo, Air India Express fly this route. Flight time is about 3h 9m.

What is the fastest connection from Chennai (MAA) to Jammu (IXJ)?

via Hyderabad ≈ 3h 40m, via New Delhi ≈ 3h 40m, via Chandigarh ≈ 3h 41m (estimated flying time, excluding layovers).

from 15,000 ANA miles (economy, one way, based on the published award charts).

Chennai International Airport (MAA) to Jammu Airport (IXJ)・2,257 km

Nonstop flights available (2 airlines). Flight time about 3h 9m. Nonstop return flights also operate.

With milesANA 15,000 miles+ (via DEL)Economy, one way, estimate. Tap a connection for miles by cabin.

9 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.