Yes, Jet2.com and Jet2holidays strictly require Advanced Passenger Information (API) for all travelers, regardless of age. In 2026, this requirement is a legal obligation mandated by most countries to assist in border security and law enforcement. The information needed typically includes your full name (as it appears in your passport), gender, date of birth, nationality, and your passport or travel document number and expiry date. Jet2 makes this process seamless through their "Manage My Booking" portal on their official website or via their mobile app. You are generally advised to provide this information as soon as you book, but it must be completed at least 72 hours before your departure. Without valid API on file, you may be unable to check in online, and you could face significant delays or even be denied boarding at the airport. Providing this data in advance also helps you breeze through the Biometric Exit Gates now common in most UK and European airports in 2026.