A True Single-Day Trip Is Not Realistic
Cappadocia is roughly 400km from Antalya by road, or requires a flight connection through Istanbul or a direct regional route — either way, a there-and-back trip in a single day would leave almost no real time on the ground. This is not how most operators actually sell it, despite how some listings are worded.
What's Actually Sold as a 'Cappadocia Trip from Antalya' Is a 2-3 Day Tour
Realistic Cappadocia packages from Antalya run 2-3 days, typically with an overnight coach or short flight, hotel stay, and a full day exploring fairy chimneys, underground cities and (optionally) a hot air balloon ride at sunrise.
Decide Based on Your Total Trip Length
If your Antalya holiday is a week or longer, a 2-3 day Cappadocia extension is genuinely worth considering — it's a completely different landscape and experience. If your trip is under a week, it will likely eat too much of your beach time to be worth the trade-off.
Book the Balloon Ride in Advance If It Matters to You
Hot air balloon flights are weather-dependent and frequently sell out or get cancelled for wind — if seeing Cappadocia from the air is the main draw for you, build in a buffer day rather than a rigid single-morning slot.
Skip anything marketed as a genuine 'day trip' to Cappadocia from Antalya — it isn't one. If you have a week or more, a proper 2-3 day extension is worth it; if you don't, it's better to save Cappadocia for a separate trip.