In most cases, having an incorrect title like "Mr." instead of "Mrs." on a flight ticket does not matter and will not prevent you from boarding. Airlines and security agencies like the TSA are primarily concerned that your legal first and last names match your government-issued ID or passport exactly. Titles are considered "honorifics" and are not part of the secure flight data used for identity verification. It is very common for titles to be truncated or appended directly to a first name on a boarding pass (e.g., "SMITH/JOHNMR"), which is a quirk of older airline reservation systems. While you should try to use the correct title when booking to ensure a seamless experience with frequent flyer accounts, a mistake here is generally treated as a minor clerical error. However, if your first or last name is misspelled by more than one or two characters, or if the name on the ticket is a nickname rather than your legal name, that is a significant issue that must be corrected through the airline's customer service department before you arrive at the airport to avoid being denied boarding at the gate.