Part of our Mumbai Metro guide โ every line, fare, timing and status update in one place.
Mumbai Metro Line 7A (Red Line) is a short airport link that extends Line 7 from Gundavali in Andheri (East) to Terminal 2 of Mumbai airport (CSMIA). The 3.4 km line is partly elevated and partly underground, with two new stations. Its tunnels are complete, but the line is not yet open: the elevated section near Airport Colony is awaiting a final height clearance from the Airports Authority of India.
Under construction ยท Gundavali โ CSMIA T2
Status
Under construction
Length
About 3.4 km
New stations
2 (1 elevated, 1 underground)
Opening
Not announced yet
Last checked: October 2026 ยท Opening dates and fares will be confirmed by MMRDA and MMMOCL.
Line 7A route & stations
Operational Under construction ยท โ Metro interchange
- Gundavali Andheri (E) ยท โ Line 7 ยท Line 1 nearby at WEH
- Airport Colony elevated ยท Vile Parle (E)
- CSMIA Terminal 2 underground ยท โ Line 3 ยท Line 8 (proposed)
Full station list
Gundavali is the existing southern terminus of Line 7. Line 7A adds the two new stations beyond it: about 0.9 km on a viaduct and about 2.5 km in twin tunnels under the airport area.
Current status (October 2026)
- Tunnels: both tunnels between Andheri (East) and the airport are complete; the final breakthrough was on 14 July 2025.
- Elevated section: by February 2026 the viaduct was complete, the ramp about 98% and Airport Colony station about 95%.
- Height clearance: the viaduct, ramp and Airport Colony station are too tall for the height AAI allowed in the airport funnel zone, because the overhead power wires were not accounted for. Work on this stretch largely stopped from early 2025.
- Latest: in October 2026, a survey by the airport operator found the extra 2.5 m would not obstruct flight paths. Formal AAI approval is awaited, and work has resumed at Airport Colony station.
- Underground station: the T2 station was moved for technical reasons to a site near a nallah, which has made construction harder.
Timings & fare
| Item | Details |
|---|---|
| Timings | To be announced. Expected to follow Red Line hours (Line 7 runs from about 5:50 AM to 11:00 PM). |
| Fare | To be announced. Red Line fares are distance-based, starting at โน10. |
| Operator | Expected to be MMMOCL (same as Line 2A, 7 and 9) |
Line 7A is planned as a continuation of the Red Line, so trains are expected to run through from Line 7 rather than as a separate shuttle. MMRDA has not yet published a service plan.
Interchange stations
Gundavali
The starting point, on the Western Express Highway in Andheri (East). Red Line trains from Dahisar and Mira Road (Line 9) will continue from here to the airport.
Airport Colony
An elevated station serving Vile Parle (East) and the Sahar side of the airport. It is built low because it sits in the flight approach zone.
CSMIA Terminal 2
An underground station at the international terminal. Change here to Line 3 for BKC, Worli, Terminal 1 and Cuffe Parade. The proposed Line 8 would link it to Navi Mumbai Airport.
Getting to Terminal 2 by metro
Today (before Line 7A opens)
Route map
See also: Mumbai Metro map โ all lines
Timeline
- 2017Maharashtra announces the airport extension of the Red Line; the cabinet approves the alignment to the international terminal.
- September 2019Civil contract awarded to J. Kumar Infraprojects, together with Line 9.
- March 2020Construction begins.
- September 2023Tunnelling begins with two tunnel boring machines.
- January โ March 2024AAI issues height clearances lower than the design needs for the elevated section.
- Early 2025Work on the elevated stretch near Airport Colony largely stops.
- 14 July 2025Final tunnel breakthrough between Andheri (East) and the airport.
- October 2026Airport survey finds the extra height safe; formal AAI approval awaited.
- NextAAI clearance, station and systems work, trials and safety inspection. No opening date announced yet (earlier target: December 2026).
About Metro Line 7A
Route explained
Line 7A leaves Line 7 south of Gundavali, near the Western Express Highway in Andheri (East), and runs on a viaduct to Airport Colony in Vile Parle (East). It then ramps down into twin tunnels and continues underground to CSMIA Terminal 2 in Sahar, passing under the Sahar Elevated Road.
The line was first planned to end at Andheri. The airport extension was added in 2017, and in 2018 MMRDA decided to end it at the international terminal rather than continue to the domestic terminal.
Why part of the line is underground
Close to the runway, structures must stay below strict height limits. Running underground near the terminal avoids those limits and lets the line reach T2 directly, alongside the Line 3 station.
Project & technical details
Length: about 3.4 km (about 0.9 km elevated, 2.5 km underground) ยท Stations: 2 new ยท Gauge: 1,435 mm standard gauge ยท Power: 25 kV AC overhead
Tunnel: twin bored tunnels, 5.6 m finished diameter ยท Cost: about โน812 crore ยท Contractor: J. Kumar Infraprojects ยท General consultant: Systra ยท Authority: MMRDA
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Frequently asked questions
Is Mumbai Metro Line 7A open?
No. Line 7A is still under construction. Its twin tunnels to the airport were completed in July 2025, but the elevated stretch near Airport Colony is waiting for a final height clearance from the Airports Authority of India (AAI). No opening date has been announced.
Where does Metro Line 7A run?
It extends the Red Line (Line 7) from Gundavali in Andheri (East) to Terminal 2 of Chhatrapati Shivaji Maharaj International Airport (CSMIA), via Airport Colony in Vile Parle (East).
How many stations does Line 7A have?
Two new stations: Airport Colony (elevated) and CSMIA Terminal 2 (underground). The line starts from the existing Gundavali station on Line 7.
Will Line 7A connect with Metro Line 3 (Aqua Line)?
Yes. Its underground terminus at CSMIA T2 is planned as an interchange with Line 3, which already serves the airport and runs to BKC, Worli and Cuffe Parade. The proposed Line 8 (Gold Line) to Navi Mumbai Airport is also planned to meet here.
Can I go from Dahisar or Mira Road to the airport by metro?
Once Line 7A opens, the Red Line will run from Mira Road (Line 9) through Dahisar and Andheri (East) to Terminal 2. MMRDA says Mira-Bhayandar commuters will then be able to reach BKC with one change, at the airport station.
Why is Line 7A delayed?
The airport section lies in the flight approach (funnel) zone, where structures must stay below set heights. The elevated viaduct, ramp and Airport Colony station were designed without enough room for the overhead power wires, so they exceed the height AAI allowed. Work on that stretch largely stopped from early 2025. In October 2026, an airport survey found the extra height would not affect flight paths, and AAI’s formal approval is awaited.
Does Line 7A go to Terminal 1 (domestic)?
No. Line 7A ends at Terminal 2 in Sahar. For Terminal 1 at Santacruz, change at CSMIA T2 to Line 3, which has a separate CSMIA T1 station.
How much does Line 7A cost?
The project is estimated at about โน812 crore. J. Kumar Infraprojects is the civil contractor. Rebuilding the airport viaduct, if it were needed, could add about โน250 crore.
Who is building and operating Line 7A?
MMRDA is building the line. Like the rest of the Red Line, it is expected to be run by Maha Mumbai Metro Operation Corporation (MMMOCL).
Other metro lines
Sources: Construction World โ height issue nears resolution (Oct 2026) ยท Metro Rail News โ height clearance issue ยท Swarajya โ AAI clearance ยท Lokmat Times โ tunnel breakthrough ยท Wikipedia โ Red Line