Yes, the name on your airline ticket must match the name on your passport exactly, including your first, middle (if included on the passport), and last names. Discrepancies as small as a misspelled letter or a missing middle name can lead to significant issues at the security checkpoint or boarding gate. In 2026, with the widespread use of Advanced Passenger Information Systems (APIS) and Electronic Travel Authorizations (like the UK’s ETA or the EU’s ETIAS), airlines and border authorities use this data to perform background checks before you even arrive at the airport. If your ticket says "Mike" but your passport says "Michael," the automated systems may fail to verify your identity, potentially resulting in a denied boarding. If you realize there is a mistake after booking, you should contact the airline immediately; while some carriers allow minor "typo" corrections for a small fee, others may require you to cancel and rebook the ticket, especially on international routes where security regulations are most stringent.