You have a couple of options to go the hotel from the Airport.
Official airport taxi.
Can be found outside the arrivals zone. Cost: around 18 EUR. They all speak English and accept credit cards. If you like to share a Taxi here is our Taxi-Sharing-List
Uber runs Cracow.
Stops outside the arrivals zone. Cost: around EUR 10
Follow the signs in the arrivals zone. Runs every 30 minutes. Cost: around EUR 2 Makes sense only if you stay in the city center (stop: Kraków Main Station) or in the venue (stop: Kraków Łobzów). Please note that the stops are approximately 15 min on foot from most of the hotels. Don't use train if you stay in Novotel City West. Tickets can be purchased in the ticket machine on the platform (cash or card) or from train stuff (cash only)
Outside the arrivals zone. Cost: around 1 EUR. Look for 208 bus. Runs approximately every hour. Makes sense only if you stay in Novotel City West (stop: Przybyszewskiego). Tickets can be purchased in the ticket machine at the bus stop (cash or card).
Airport Shuttle Hotel
Booked over the Best Western Hotel, the service costs for 1-4 people 25 Euro and for 5-7 people 35 Euro.
Please note that Poland is in EU but not in the Euro zone. That is why most place accept payment only in Polish Zloty not Euro. Credit cards are widely accepted and ATMs are located in the airport.