Bangalore to Kolkata — 1,870 km. 36 Hours Saved by Flying.

Bangalore to Kolkata spans almost 1,900 km diagonally across India. The flight is 2.5 hours. The train is 36 hours across 5 states. Math is simple.

Comparison

Verdict

• ✈️ Fly. Obviously. You save 33+ hours. That's almost 1.5 days
• 🚂 Train? Only for the extreme budget traveler willing to spend 2 nights on a train