Amalfi Coast Suggestions

What time of year?
Ferries don’t run year round

If you take a ferry from Naples to Sorrento, hop on the next ferry to Amalfi. If there is no ferry service take the Circumvesuviana regional train located in Naples Centrale station on the lower level to Sorrento, the end of the line. The bus stop to Amalfi is in the cul de sac as the train station across the street that's about 30 feet away.

Probably quicker, definitely more direct to take train to Salerno
Then bus or ferry along the coast

Have your hotel call for a taxi

Need time of year to determine how late in day ferries or buses run

You can find schedules on this site
https://www.positano.com/en/t/napoli/sorrento

bob, do you mean "to Amalfi, the town" or "to the Amalfi Coast"? It's your Subject Line that causes the confusion. Do you have a room booked in Amalfi town?

It's also important to know what else you are doing during the visit, although the arrival transit doesn't have that much effect on it. It's just that if (to pick a likely example) you are going to Pompeii by the cheapest means, you can "learn something about that" with certain trips from Naples to Amalfi (or to Sorrento, not on the Amalfi Coast).

BTW, you CANNOT wake up in Amalfi (or really, anywhere on the AC) on the same day you fly out of anywhere at 6AM. It's very risky to depend on such a long cab ride, from a relatively "far" (not "remote") place. It's certainly impossible by public transit. It's also an expensive cab for someone who specifies "public transport" in his OP.

The Month of the year is important.

According to this thread OP intends to stay in Napes on last night
https://community.ricksteves.com/travel-forum/italy/suggestions-for-road-trip-italy

Bob- you might want to review the advice given above thread regarding staying in Naples or Salerno.
Then maybe update us as to your plan as it is now?

hi guys. This is for tomorrow. I am staying in Naples. Want to go to amalfi coast from naples and return back in the evening.

Some ferries run to end of October so you might be lucky
Some stop mid October

you’ll have to research here ( under Routes and Schedules) and maybe ask your lodgings in Naples for most up to date info

https://www.positano.com/en/t/napoli/sorrento

bus or ferry along the coast

Christine, when I took the bus from Amalfi to Positano to Sorrento it travelled inland not along the coast. I'm pretty sure the bus travels along the coast when traveling east only.

We took bus from Amalfi to Positano, it traveled along the coast.
Past that point I have no idea

Hopefully OP will be able to use ferries

We took bus from Amalfi to Positano, it traveled along the coast.

So did I but it travelled inland not along the coast and I caught the bus where I got off in Amalfi which was SS163 a.k.a. the Amalfi Coast Road. I then got off in Positano and had the exact same experience going to Sorrento. I'll tell what though it was a much quicker drive than driving east.