Settle the Delphi connection first
The order is Athens, Delphi, Kalambaka, Athens, Nafplio and Athens. You spend two nights in Athens at the start, one in Delphi, one in Kalambaka, one back in Athens and one in Nafplio. Day seven ends in Athens without another hotel night included.
KTEL Trikala publishes a weekday Delphi–Trikala coach via Lamia. You then need the onward bus to Kalambaka. There is no Delphi railway station and no direct train for this leg. Match the dates to the operator timetable before committing to the whole circuit. If it does not work, change the order or leave out a stop.
Choose the visits before adding extras
The Acropolis site costs €30 for a standard adult ticket; the Ancient Agora is €20. The Acropolis Museum is a separate €20 choice. Delphi's €20 ticket includes its museum, while Palamidi is another €20 admission. These paid visits sit outside the daily room-and-meal figures below.
At Meteora, choose a monastery that opens on your visit day. Do not build a short stay around visiting every interior. The Great Meteoron visiting page explains its closure days and dress requirements.
Give the final journey enough room
Nafplio coaches arrive at Athens Kifisos terminal. For an airport connection from there, the relevant airport express bus is X93, not the Syntagma X95. Add the coach ride, traffic, the bus wait and your airline's check-in time. If the flight is too early, return to Athens the previous day and adjust the overnight bookings.
Build the budget from nights and days
The day figures add up to €792.00 for one traveller before paid visits and extra journeys. A private-room line buys the whole room; divide only that part when sharing. These are chosen spending allowances, not available room offers or measured averages. Replace the stay amount with the full booking cost, including taxes and cleaning.
Add paid visits, excursions, intercity or inter-island tickets and airport journeys. The day notes separate accommodation, meals, local travel and small extras. The final day has no extra overnight allowance. The city budget cards are an alternative plan, so do not add them on top of this subtotal.