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Chennai Central to Kilambakkam Bus: 18A, 21G, PP21 and Trains

From Central or Egmore to KCBT: the MTC buses that run there, what they cost, and the suburban train that is often quicker in the evening.

31 October 2026

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The Chennai Central to Kilambakkam bus options are MTC’s 18A and 21G from Broadway, which MTC listed for the Kilambakkam terminus (KCBT), and the PP21 AC electric bus from Island Ground; ordinary fares on these GST Road routes are under Rs 25. The train alternative is a Beach-line local from Egmore or Park to Vandalur, Urapakkam or Guduvanchery.

The numbers

10 minaverage gap MTC gave for Broadway buses to KCBT

42.9 kmlength of route PP21, High Court to Guduvanchery

Rs 16full-route ordinary fare on 18A

Rs 40metro fare, Central to St Thomas Mount

Rail passengers arriving at Central or Egmore with a connection to a southbound government bus now have a 30 km-plus transfer to Kilambakkam, because those buses no longer leave from Koyambedu. The bus is the simplest option with luggage, the train is cheaper and usually faster in the evening peak, and the metro is a middle path.

Route details here come from the MTC route data on the Spirit of Chennai route pages. Their frequency figures are averages and may be dated, so check live timings in the Chennai One app or with MTC before you set out.

Chennai Central to Kilambakkam bus routes

When the terminus opened, MTC listed 18A and 21G from Broadway to KCBT at an average gap of 10 minutes, DT Next reported. Both reach GST Road at Guindy and run through St Thomas Mount, the airport, Pallavaram, Chromepet and Tambaram.

18A is the one that actually calls at Central. Its route page shows it leaving High Court (Broadway), stopping at Central, then running down Anna Salai past TVS, DMS and Saidapet to Guindy railway station and GST Road. The page lists a first bus around 5 a.m. and a last around 9.30 p.m. from both ends, an end-to-end time of 65 to 80 minutes, and a gap of about 57 minutes, so on that data it is not a frequent route.

21G starts at Broadway bus terminus and goes via the Secretariat, Chepauk, Mandaveli, Adyar Gate and Anna University to Guindy. Its route page shows 18 stops over 33.6 km and an average gap of 7 minutes, with first and last buses at 5.45 a.m. and 9.25 p.m. From Central, it is a short ride or walk to Broadway to catch it.

PP21 is the third option. Its route page shows it from High Court through Chepauk, Adyar bus stand and Guindy to Tambaram, then on through Perungalathur, Vandalur and Urapakkam to Guduvanchery, 24 stops over 42.9 km at a gap of about 54 minutes. When 130 AC electric buses were flagged off on 25 August 2026, PP21 was listed from Island Ground to Kilambakkam, DT Next reported.

Grid of routes 18A, 21G and PP21 against nine stops from Broadway to Guduvanchery; only 18A stops at Central, only PP21 continues past Tambaram to Vandalur and Guduvanchery. — PP21 is the only one of the three that runs past KCBT in the route data.

Route	From	Length	Average gap	Fare on route page
18A	High Court, via Central	26.4 km	about 57 min	Rs 16 full route, ordinary
21G	Broadway	33.6 km	about 7 min	Rs 17 ordinary, Rs 25 express
PP21	High Court	42.9 km	about 54 min	Not listed

Source: MTC route data via Spirit of Chennai route pages. 18A and 21G end at Tambaram in this data; PP21 continues past KCBT to Guduvanchery. Gaps are averages and may be dated.

From Egmore and Central by suburban train

The suburban train is the main alternative to the bus. Egmore is on the Beach to Tambaram and Chengalpattu line; from Central, the line is reached at Park station or by the metro. Southbound locals stop at Tambaram and continue to Vandalur, Urapakkam and Guduvanchery.

Southern Railway’s February 2024 notice placed KCBT between Vandalur and Urapakkam and extended five evening locals from Chennai Beach to Guduvanchery, leaving Beach between 7.19 p.m. and 9.40 p.m. on weekdays, to serve terminus passengers. Those timings may have changed; check the current suburban timetable at the station.

A Kilambakkam station is being built beside the terminus, with a skywalk across GST Road, but Southern Railway had not announced its opening when we checked.

It’s often said trains from Chennai Central run to Kilambakkam.

The record shows Central’s suburban platforms serve the Arakkonam and Gummidipoondi lines. The southbound Beach to Chengalpattu line runs through Park and Egmore, so from Central you change to Park or take the metro first.

Metro then bus

From Puratchi Thalaivar Dr MGR Central or Egmore metro, the CMRL fare table lists Rs 40 to St Thomas Mount and Rs 40 to the airport. Get off at either and take a southbound GST Road bus for the last stretch. This avoids Anna Salai traffic and suits people with only a backpack.

5 trains

Evening Beach-line locals Southern Railway extended to Guduvanchery for Kilambakkam passengers, per its 2024 press release.

Late-night options

MTC’s 2023 list for the terminus named night services from 12 points, including Broadway, CMBT, Tambaram and Saidapet West, without route numbers or times, DT Next reported. MTC prices night services on its deluxe fare table, Rs 11 to Rs 49 by stage plus a Rs 1 cess.

No current night timetable for the Central to Kilambakkam corridor is published, so if your train arrives after about 10 p.m., check the Chennai One app before leaving the station, or plan for a cab.

Luggage matters on this trip. MTC lets each passenger carry up to 5 kg free, charges extra for heavier bags, and does not allow luggage during peak hours under the rules on its fares page.

What this means for you

From Central, 18A stops at the station; for a more frequent bus, walk to Broadway for 21G.
In the evening peak, a Beach-line local from Egmore or Park to Vandalur or Urapakkam is usually the quicker choice.
Check the destination board: 18A and 21G show Tambaram in older data, so pick a bus marked Kilambakkam or change at Tambaram.
Arriving late at night, confirm a night bus in the app before you leave the station.

Quick answers

Which bus goes from Chennai Central to Kilambakkam?

MTC listed 18A and 21G from Broadway to KCBT; 18A calls at Central. The AC electric PP21 runs from Island Ground to Kilambakkam.

How much is the bus fare from Chennai Central to Kilambakkam?

Ordinary fares on these routes are under Rs 25 (18A’s full route is Rs 16 and 21G’s Rs 17 on their route pages); deluxe and AC buses cost up to Rs 49 plus cess.

Is there a train from Egmore to Kilambakkam?

Take a Beach-line local from Egmore to Vandalur, Urapakkam or Guduvanchery and a short ride to KCBT. The Kilambakkam station was not open on 31 October 2026.