Idukki has no railway line and no commercial airport, so every journey ends on a ghat road. That sounds harder than it is: two international airports — Kochi on the Kerala side and Madurai in Tamil Nadu — are each about four hours from Munnar and from Thekkady, and the drives are a highlight in themselves.
Here are the main routes at a glance. Distances are approximate and times are typical in good conditions; allow more on weekends, holidays and in the monsoon.
Distances and driving times
| Route | Distance | Typical drive | Via |
|---|---|---|---|
| Kochi airport → Munnar | ≈110 km | 3.5–4.5 h | Kothamangalam, Neriamangalam, Adimali |
| Kochi airport → Thekkady | ≈150 km | 4–5 h | Muvattupuzha, Thodupuzha or Kottayam, Mundakayam |
| Kochi → Vagamon | ≈100 km | 3–3.5 h | Thodupuzha or Pala, Erattupetta |
| Kochi → Idukki Arch Dam | ≈115 km | 3–3.5 h | Muvattupuzha, Thodupuzha, Kulamavu |
| Madurai → Munnar | ≈155 km | 4–4.5 h | Theni, Bodinayakanur, Bodimettu |
| Madurai → Thekkady | ≈140 km | 3.5–4 h | Theni, Cumbum, Kumily |
| Munnar → Thekkady | ≈90–110 km | 3–4 h | Poopara, Nedumkandam |
| Kottayam → Thekkady | ≈110 km | 3–3.5 h | Mundakayam, Peermade |
From Kochi to Munnar
The standard route follows the Kochi–Dhanushkodi highway (NH85). From the airport at Nedumbassery you head east through Perumbavoor and Kothamangalam, cross the Periyar on the old arch bridge at Neriamangalam — the traditional “gateway to the high ranges” — and climb through forest to Adimali and on to Munnar. The roadside waterfalls at Cheeyappara and Valara are on this stretch and are worth a stop from June to November.
A prepaid or pre-booked taxi from the airport is the simplest option; app cabs are less reliable for a one-way trip into the hills. If you would rather not organise it, the private Munnar day tour from Kochi and the multi-day circuits include the transfer.
From Kochi to Thekkady
There are two common ways up. One runs south-east through Kottayam or Pala to Mundakayam, then climbs past the tea estates of Peermade and Vandiperiyar to Kumily. The other goes via Muvattupuzha and Thodupuzha and across the hills past the Idukki reservoir and Kattappana — slower, but it lets you see the Idukki Arch Dam on the way. Either takes four to five hours.
From Madurai
Madurai is the natural gateway from Tamil Nadu and is, if anything, a quicker drive than from Kochi. For Thekkady, the road runs west across the plains through Theni and Cumbum and climbs a short ghat to the border at Kumily. For Munnar, you turn north at Theni for Bodinayakanur and climb the long series of hairpins to the pass at Bodimettu, entering Kerala at about 1,400 m among cardamom and tea.
GetYourGuide lists a private three-day Munnar trip from Madurai if you would like the transport and hotel arranged together.
Between Munnar and Thekkady
Most itineraries include this cross-country drive of three to four hours. The usual road leaves Munnar past Devikulam and the Gap Road viewpoints, drops to Poopara and continues through cardamom estates via Nedumkandam to Kumily. It is one of the most scenic roads in Kerala; with an early start you can detour to Ramakkalmedu. The Gap Road section is prone to landslides in the monsoon and is occasionally closed, in which case traffic is diverted.
By bus
Kerala State Road Transport Corporation (KSRTC) buses run to Munnar from Ernakulam and Aluva, and to Kumily from Ernakulam and Kottayam, with onward links between Munnar and Kumily. Tamil Nadu state buses climb to Munnar from Theni and to Kumily from Madurai, Theni and Cumbum. Journeys take roughly an hour longer than by car. KSRTC also runs low-cost sightseeing buses from the Munnar depot on several routes; schedules change, so check at the depot or on the KSRTC website.
By train
There is no station in Idukki. For Munnar, the most useful railheads are Aluva and Ernakulam (about 110–130 km); for Thekkady and Vagamon, Kottayam (about 110 km and 65 km). On the Tamil Nadu side, Madurai Junction has trains from all over India, and the branch line to Theni and Bodinayakanur gets you closer still, though with few services.
By air
Cochin International Airport (COK) at Nedumbassery is the main gateway, with flights from across India, the Gulf and South-East Asia. Madurai Airport (IXM) is the alternative for southern and eastern approaches. Coimbatore is a third option for Marayoor and northern Munnar, about four to five hours away via Udumalpet.
Getting around once you are there
Public buses link the towns but not the sights. In practice almost everyone hires a car with a driver for the whole trip or a local taxi or jeep by the day; autorickshaws are fine for short hops around Munnar and Kumily. Self-drive rental exists in Kochi, but the roads are narrow, steep and busy with buses — only take it on if you are used to mountain driving in India. Fuel up in the towns; pumps are sparse between them.
