**There’s no need to book ahead just because he’s arriving late on Sunday.** Prague Airport says its official taxi service, **Uber Airport**, has cars available 24/7 directly outside the arrivals halls of both terminals, including Terminal 1. [Airport taxi information](https://www.prg.aero/en/taxi)

I’d suggest your dad collects his luggage, then orders a ride using either:

- **An arrivals-hall self-service kiosk:** no Uber app needed; payment is by card.
- **The Uber app:** select **Uber Airport** and follow the pickup instructions.

He’ll receive a six-digit PIN to give the driver. The staffed taxi counters close at 21:00, so at around 23:00 he should use a kiosk or the app. This is an order-before-boarding service, rather than simply getting into a car at the rank. [Airport booking instructions](https://www.prg.aero/en/taxi)

Calling AAA after collecting his luggage is also reasonable, but their arrival time would depend on availability. **For simplicity, I’d use the official airport service on arrival.** There could still be a short wait; 24-hour service doesn’t guarantee immediate pickup. [Uber’s airport pickup information](https://www.uber.com/global/en/r/airports/prg/pickup/)