City guide
Mumbai BOM: What to Do on a Layover
Dabbawala system and Chhatrapati Shivaji in 3 hours: colonial architecture, chai.
Getting from the airport
BOM to city center: 79 minutes by rail (Ambernath - Mumbai CSMT Fast (Central Line)). Trains run every 2 minutes. Service runs 06:00 to 22:00. Skip the taxi unless your connection is under 5 hours.
What to do in Mumbai
The stops worth making: Gateway of India, Dharavi, Bollywood tour, Chhatrapati Shivaji station. Rated above 4.4: Gateway Of India Mumbai (4.6), Churchgate Station (4.6), Nariman Point, Mumbai (4.7), Chhatrapati Shivaji Maharaj Vastu Sangrahalaya (4.6), Marine Drive Beach,Mumbai (4.6). You do not need the full tourist circuit. Pick two and commit.
Visa and entry
Mumbai is US passports get visa on arrival. Check the embassy site before booking. The border process at BOM is standard. Budget 30 minutes.
How long do you need
The minimum useful layover is 6 hours. That gives you 79 minutes in each direction plus about 112 minutes on the ground. Up to 48 hours is a proper overnight.
BOM airport
BOM has 6 lounges. For short connections under 4 hours, the terminal is the destination: food options, showers, and enough space to reset before the next leg.