Mumbai Metro Line 3 Aqua Line: CSMIA Airport T1 and T2 Route, Timings, Fares, and Interchange Guide (2026)

Quick Summary

• Primary Update: Mumbai Metro Line 3 (Aqua Line), operated by Mumbai Metro Rail Corporation Limited (MMRCL), provides direct underground rail connectivity to Chhatrapati Shivaji Maharaj International Airport via two dedicated subterranean stations: CSMIA T1 (Santacruz Domestic) and CSMIA T2 (Sahar International & Domestic).
• Transit Impact: Commute times between Bandra Kurla Complex (BKC) and CSMIA T2 are slashed to 12 minutes for ₹30, while inter-terminal transit between T1 and T2 takes just 5 minutes for ₹10, bypassing chronic Western Express Highway and Sahar Elevated Road vehicular gridlock.
• Traveler Advice: Passengers arriving via Central Railway or Western Railway can interchange at Marol Naka (Metro Line 1) or suburban junctions; luggage allowances permit standard bags up to 25 kg within 160 cm linear dimensions through station X-ray scanners.

Traversing the commercial capital to reach Chhatrapati Shivaji Maharaj International Airport (BOM / CSMIA) has historically ranked among India's most stressful urban transit experiences. For decades, air travelers navigating the Western Express Highway (WEH), Sahar Elevated Road, or Santacruz-Chembur Link Road faced unpredictable traffic snarls, where a 10-kilometer cab ride could stretch beyond 75 minutes during peak evening or morning flight banks.

The commissioning of Mumbai Metro Line 3—the 33.5-kilometer underground Aqua Line—fundamentally transforms city-to-airport mobility. By threading high-capacity, air-conditioned metro trains directly beneath Mumbai's north-south arterial corridor, the Aqua Line links the financial hub of Bandra Kurla Complex (BKC), the northern commercial districts of SEEPZ and Andheri East, and the suburban rail grid directly to both airport terminals.

This operational guide details exact station access points, walking routes into terminal concourses, operational timetables, ticketing methods, baggage dimensions, and interchange strategies for air travelers using Mumbai Metro Line 3.

Mumbai Metro Line 3 Aqua Line: Route and Network Architecture

Line 3 represents Mumbai's first fully underground metro corridor, engineered with advanced tunnel boring technology to withstand monsoon water tables and dense urban infrastructure. The line spans 27 stations from Aarey JVLR in the north through the airport precinct, BKC, Dadar, Worli, and south to Cuffe Parade.

The airport corridor is anchored by two critical underground stations:

1. CSMIA T1 Station: Situated in Santacruz East, directly serving Terminal 1 (domestic flights operated primarily by low-cost carriers, including select IndiGo, SpiceJet, and Akasa Air domestic schedules).
2. CSMIA T2 Station: Situated beneath the Terminal 2 forecourt in Sahar, directly serving all international departures and arrivals, alongside Air India, Vistara, and domestic mainline departures.
3. Sahar Road Station: Positioned between T1 and T2, serving airport cargo complexes, hotel clusters, and airport logistics operations.

All Line 3 stations feature full-height Platform Screen Doors (PSDs), synchronized with eight-car Alstom trainsets running on 25 kV AC overhead catenary power. Trains operate at design speeds up to 85 km/h, delivering average commercial operating speeds of 35 to 40 km/h including station dwell times.

CSMIA Terminal 2 Metro Station: Direct Concourse Navigation

CSMIA T2 is one of the world's most heavily utilized airport terminals. The Aqua Line underground station at T2 is integrated directly beneath the multi-level parking and arrivals roadway, eliminating the need to step outside into outdoor weather or vehicle pickup lanes.

Level 4: Departures Hall (Airline Check-in & Security Screening)
       ^
       | [High-Speed Elevators & Escalators]
       v
Level 2: Arrivals Hall (Baggage Reclaim, Customs & Exit)
       ^
       | [Direct Air-Conditioned Pedestrian Subway Link]
       v
Metro Concourse Level (Ticketing, AFC Gates & Security X-Ray)
       ^
       | [Station Escalators & Lifts]
       v
Metro Platform Level (Line 3 Aqua Line Tracks & PSD Doors)

Arriving at T2 by Metro (Departing Air Passengers)

1. Platform Exit: Alight at CSMIA T2 Station. Follow the illuminated overhead signage marked "Airport Terminal 2 / Departures".
2. Concourse Level: Ascend via escalators or high-capacity elevators to the metro concourse. Tap your ticket or National Common Mobility Card (NCMC) at the Automated Fare Collection (AFC) exit gates.
3. Underground Concourse Link: After passing the fare barriers, follow the dedicated air-conditioned pedestrian link. This corridor leads directly into the terminal structure.
4. Terminal Elevators: Take the high-capacity vertical elevators or escalators up to Level 4 (Departures) for domestic and international airline check-in counters.
5. Walking Time: The total transfer time from metro train door to airline check-in islands spans between 4 and 7 minutes.

Exiting T2 to the Metro (Arriving Air Passengers)

1. Arrivals Hall: After clearing baggage claim and customs (international) or baggage pickup (domestic) on Level 2 (Arrivals), exit into the meet-and-greet area.
2. Follow Metro Signage: Look for distinct cyan-and-black signage reading "Metro Line 3 / Aqua Line".
3. Dedicated Escalator / Lift Shaft: Descend directly to the metro concourse link without crossing surface vehicular drop-off lanes.
4. Security Screening: Place your luggage on the CISF / MSSC X-ray conveyor belts, pass through the metal detector frame, and enter the metro paid concourse.

Important · Regulatory Mandate

Airport Trolley Policy: Standard airport baggage luggage trolleys are permitted throughout the airport terminal pedestrian connectors up to the outer metro security boundary. However, airport trolleys cannot pass through metro AFC fare gates or onto escalators and train platforms. You must carry or wheel your luggage using its built-in wheels once entering the metro ticketing zone.

CSMIA Terminal 1 Metro Station: Domestic Terminal Navigation

Terminal 1 at Santacruz handles high-density domestic departures. The CSMIA T1 underground metro station is situated beneath the airport approach zone, linked to the terminal concourse via a covered, weather-protected pedestrian pathway equipped with moving walkways (travelators) and elevators.

Accessing T1 from the Metro

• Alight at CSMIA T1 Station.
• Pass through the AFC gates and follow signs for "Terminal 1 Departures / Arrivals".
• Use the dedicated sub-surface or covered grade-level connector that leads straight to Terminal 1A/1B entry gates.
• Walking duration from train platform to T1 entry security gates is approximately 5 to 8 minutes.

Inter-Terminal Transfer: T1 to T2 in 5 Minutes

One of the most consequential benefits of Mumbai Metro Line 3 is solving the notorious inter-terminal transfer problem. Previously, passengers with self-connecting domestic flights landing at Terminal 1 and departing from Terminal 2 faced an agonizing transfer:

• Cabs and auto-rickshaws charged between ₹200 and ₹400.
• Peak vehicular transit times along Nehru Road and the Western Express Highway ranged from 30 to 60 minutes.
• Airport shuttle buses operated on variable headways subject to external traffic jams.

The Aqua Line Inter-Terminal Hop

With Line 3, Terminal 1 and Terminal 2 are separated by just one intermediate station (Sahar Road).

Passengers transferring between terminals simply purchase a minimum ₹10 ticket, board the northbound train from T1 (towards Aarey JVLR), ride two stops to CSMIA T2, and ascend directly to the international departures hall.

Operating Hours, Frequency, and Fare Structure

Mumbai Metro Line 3 operates on fixed timetables calibrated to match Mumbai's round-the-clock air travel demand.

Train Timings & Frequency

• Monday to Saturday Operations: First train departs origin stations at 06:30 AM; last train departs at 10:30 PM (22:30).
• Sunday Operations: First train departs at 08:30 AM; last train departs at 10:30 PM (22:30).
• Peak Headway (08:00 to 11:00 & 17:00 to 20:30): Trains run every 6.5 to 7 minutes.
• Off-Peak Headway: Trains run every 10 to 12 minutes.

Line 3 Station-to-Station Distance, Travel Time, and Fare Chart

The table below outlines operational parameters connecting key urban hubs to CSMIA Terminal 2:

Interchanging with the Mumbai Transit Grid

The Aqua Line acts as a master spine connecting previously fragmented transit networks across Mumbai.

       [Western Railway: Andheri] <===> (Metro Line 1)
                                              ^
                                              |
[Line 3: Aarey] <---> [MAROL NAKA INTERCHANGE] <---> [Line 1: Ghatkopar] <===> [Central Railway]
                              |
                              v
                     [CSMIA T2 STATION]
                              |
                              v
                     [CSMIA T1 STATION]
                              |
                              v
                       [BKC STATION] <===> [Corporate Shuttles & Line 2B]

1. Interchanging at Marol Naka (Metro Line 1)

Passengers traveling from Ghatkopar, Powai, or Versova can reach CSMIA in minutes by interchanging at Marol Naka:

• Alight from elevated Metro Line 1 at Marol Naka.
• Follow the interior interchange concourse down into the underground Line 3 station via dedicated escalators and lifts.
• Board the southbound Line 3 train (towards BKC / Cuffe Parade).
• The next station is CSMIA T2 (travel time: under 5 minutes).

2. Connecting from Suburban Railway Networks

• From Central Railway (Thane, Kalyan, Navi Mumbai): Take the Central suburban local to Ghatkopar Station. Transfer to Metro Line 1 to Marol Naka, then transfer to Line 3 down to CSMIA T2. Total transit time from Ghatkopar to CSMIA T2 is under 22 minutes.
• From Western Railway (Borivali, Kandivali, Malad): Take the Western suburban local to Andheri Station. Transfer to Metro Line 1 to Marol Naka, then take Line 3 to the airport. Alternatively, use feeder buses or taxis to JVLR/SEEPZ Line 3 stations.
• From South Mumbai & Central Hubs (Full Line 3 Corridor): Mainline trains arriving at Mumbai Central or Chhatrapati Shivaji Maharaj Terminus (CSMT) link directly to underground Line 3 platforms, offering a direct 35 to 45-minute underground ride straight into CSMIA T2 without changing trains.

Ticketing Channels and Smart Card Integration

MMRCL supports multiple digital and physical ticketing methods to avoid bottlenecking at airport entry points.

1. WhatsApp QR Ticketing  -> Send text, receive instant mobile QR
2. National Common Card   -> Tap RuPay NCMC at any AFC turnstile
3. Mumbai 1 Mobile App    -> Digital booking via UPI or cards
4. Station TVMs           -> Paper QR tickets via cash, card, UPI

1. National Common Mobility Card (NCMC): Any bank-issued RuPay NCMC card functions automatically at Line 3 AFC gates. Tap at the entry turnstile and tap out at your destination station. Fares deduct instantly from the card's stored-value wallet.
2. WhatsApp QR Ticketing: MMRCL operates an automated WhatsApp ticketing service. Travelers can scan the designated station QR code or message the official MMRCL chatbot number, select their origin and destination, pay via UPI, and receive an instant QR code on their phone screen to scan at the gate.
3. Mumbai 1 / Metro Mobile App: Available on iOS and Android, allowing passengers to generate single-journey, return-journey, or trip-pass QR tickets with zero queuing.
4. Ticket Vending Machines (TVMs): Multi-lingual touchscreens installed across CSMIA T1 and T2 concourses accept UPI QR scanning, debit/credit cards, and cash banknotes.

Luggage Dimensions, Weight Limits, and Security Screening

Unlike long-distance trains, rapid transit metro networks operate strict safety and baggage parameters governed by the Bureau of Civil Aviation Security (BCAS) and MMRCL transit rules.

Baggage Allowance Rules

• Maximum Weight: Up to 25 kg of personal luggage per fare-paying passenger is permitted without additional charge.
• Maximum Dimensions: Luggage dimensions must not exceed linear dimensions of 160 cm (Length + Width + Height, or roughly 80 cm x 50 cm x 30 cm).
• Cabin Bags & Suitcases: All standard international cabin sizers (55 x 35 x 25 cm) and standard 23 kg to 32 kg checked bags are fully permitted, provided they fit comfortably through the station X-ray scanning tunnel (standard aperture 100 cm x 80 cm).
• Multiple Pieces: A traveler carrying one standard rolling suitcase and one personal backpack or laptop bag is fully permitted without penalty.

Prohibited Items at Metro Stations

All passengers must clear security baggage scanning before entering the paid concourse:

• Flammables & Combustibles: Gas canisters, lighter fluid, petroleum products, and fireworks are strictly prohibited.
• Alcohol: Only sealed, unopened duty-free liquor bottles (up to 2 liters per adult, adhering to state excise regulations) are permitted; opened bottles are confiscated.
• Power Banks & Batteries: Personal power banks up to 20,000 mAh (under 100 Wh or up to 160 Wh) are permitted in hand baggage; loose lithium-ion cells without casing are banned.
• Sharp Items: Scissors with blades exceeding 6 cm, utility knives, and tools are prohibited.

Traveler Logistics Guide

Navigating the airport transit corridor requires balancing flight departure timelines with metro operating parameters. Follow these concrete steps:

Flight Departure Transit Buffer

• Domestic Departures (T1 or T2): Arrive at the metro station at least 2 hours and 30 minutes prior to scheduled domestic departure. This allows 15 minutes for metro transit, 10 minutes for concourse walking and luggage transition, and the standard 2-hour airline check-in buffer.
• International Departures (T2): Arrive at your boarding metro station at least 3 hours and 45 minutes prior to international departure.

Step-by-Step Terminal Checklist

1. Verify Your Terminal: Check your airline ticket confirmation before boarding the metro.
   • Terminal 1: IndiGo (specific domestic flights), SpiceJet, and Akasa Air domestic operations.
   • Terminal 2: Air India, Vistara, all international airlines (Emirates, Singapore Airlines, Qatar Airways, Lufthansa, British Airways), and designated domestic operations.
2. Prepare Luggage for Metro X-Ray: Ensure your power banks, laptops, and liquids are packed inside bags according to standard airline travel rules; do not leave loose items unzipped on the conveyor belt.
3. Have Digital QR or NCMC Ready: Prepare your phone screen brightness at maximum when scanning mobile WhatsApp QR tickets at AFC gates to avoid gate read errors.
4. Mind the Timetable at Night: Because Aqua Line operations conclude at 10:30 PM (22:30), passengers booked on midnight or 03:00 AM international departures must board the metro before the final 22:30 departure from origin stations, or arrange pre-booked app cabs or taxis for late-night travel.

Frequently Asked Questions

Can I transfer between Terminal 1 and Terminal 2 using Mumbai Metro Line 3?

Yes. CSMIA Terminal 1 and CSMIA Terminal 2 are separated by only one intermediate stop (Sahar Road) on the Aqua Line. Boarding the northbound train from CSMIA T1 takes just 5 minutes to reach CSMIA T2 for a fare of ₹10, offering a fast, predictable alternative to surface road taxis that frequently get stuck in 45-minute traffic jams.

Does Mumbai Metro Line 3 run 24 hours for late-night international flights?

No. Mumbai Metro Line 3 operates from 06:30 AM to 10:30 PM Monday through Saturday, and from 08:30 AM to 10:30 PM on Sundays. If your international flight departs during the early morning hours (between 01:00 AM and 06:00 AM), you must either take the last train before 10:30 PM and wait in the terminal departures hall, or utilize road-based airport taxis.

Can I take an airport luggage trolley onto the metro train or into the station?

No. Standard airport luggage trolleys provided by CSMIA are restricted to the airport concourses and outer walkways. Trolleys cannot pass through the metro security screening checkpoints, Automated Fare Collection (AFC) turnstiles, or onto platform elevators and trains. All baggage must be wheeled on its own casters or carried.

How do I connect to Mumbai Metro Line 3 from the Western or Central suburban railway?

The fastest current interchange is at Marol Naka. Arriving Central Railway passengers alight at Ghatkopar Station, take Metro Line 1 to Marol Naka, and descend into the underground Line 3 station for a 5-minute ride to CSMIA T2. Western Railway passengers can take Line 1 from Andheri Station to Marol Naka to connect to Line 3, or use direct rail-to-metro interchanges at Dadar and Mumbai Central.