Guwahati is the gateway to the North East of India, so you’ll most likely be landing into the international airport there.
It’s a huge city spread across a wide area. As it’s based 7km out on the west side of the city don’t underestimate the time it takes to reach. It can be really congested with traffic at peak times.
The Assam State Transportation Corporation links are amazing in the city. There is a direct service that runs back and forth to the temple from the main bus stand at Paltan Bazaar. Bus prices are super cheap at anywhere from 15 to 50 rupees per journey. It charges by kilometre. For more info, see here.
Under Dharmajyoti, pilgrims receive a concessional fare of 50% off! So, if you were here on a pilgrimage, definitely take advantage of that. For more info, see here.
There is also Uber and the Indian version Ola (Ola works better in my opinion as there’s more drivers) in Guwahati. You simply need to download there apps from the App Store or Google Play. But, I’d suggest that you must have an Indian phone number to keep track! They’re good for not getting ripped off.
Or, you can grab a good old fashioned Tuk Tuk (3 wheeler), but haggle hard. They were quite tough on prices here, especially with foreigners. Even my Indian traveler friends were having a hard time because they were speaking Hindi instead of Assamese (the local language).