Wizz Air offers multiple check-in options to accommodate passengers' preferences and schedules. The earliest you can check in depends on the method you choose and your seat selection.

Online and Mobile Check-In: Wizz Air provides online and mobile check-in services from 30 days up to 3 hours before your scheduled departure time if you have purchased a seat during booking. If you haven't purchased a seat, online check-in opens 24 hours before departure and closes 3 hours prior to departure. To check in online, visit the Wizz Air website or use the mobile app, enter your booking reference and surname, and follow the prompts. During online check-in, you can select your seat, add baggage, and receive your boarding pass digitally. If you have checked baggage, you can print your boarding pass online and proceed to the designated bag drop area at the airport. If you're traveling with only carry-on luggage, online check-in allows you to head straight to the security area or boarding gate after arriving at the airport. Please note that online check-in is not available at all airports; in such cases, airport check-in is offered free of charge. 

Airport Check-In: If you prefer to check in at the airport, Wizz Air provides staffed check-in counters at major airports. It is recommended to arrive at the airport at least 2 hours before departure for international flights and 1 hour before departure for domestic flights to allow sufficient time for check-in, security checks, and boarding. Please note that check-in counters typically close 40 minutes before departure for all flights. Additionally, an airport check-in fee may apply if you haven't checked in online. 

Self Check-In at the Airport: Wizz Air offers self-check-in kiosks at select airports that allow you to check in, print your boarding pass, and tag your luggage without queuing at the check-in counters. These kiosks are available from 2 hours before departure and close 40 minutes before departure.

Special Considerations: Passengers requiring special assistance, traveling with infants, unaccompanied minors, or pets, or those with non-machine-readable passports or visas may need to check in at the airport counter regardless of the check-in method. It's advisable to verify your eligibility for online check-in based on your specific circumstances. 

Conclusion: While Wizz Air offers online check-in starting 30 days before departure for passengers who have purchased a seat, it's essential to verify your eligibility based on your specific flight details and circumstances. Always check the airline's official website for the most current information and guidelines. If in doubt, contacting Wizz Air directly can provide clarification and assistance.