A: I’m sorry Spirit stopped you from boarding your flight to Las Vegas. If you arrived at the airport on time, the airline should have allowed you on the plane.

The airport agent misinformed you. Check in begins 24 hours before departure and ends an hour prior to departure, according to Spirit. If you don’t check in online, you can use an airport self-serve kiosk or ask an agent for help. Spirit charges a $10 fee to print each boarding pass at the counter.

I’m not sure where you heard about your flight being overbooked. Normally, the airline will ask for volunteers at the gate. If it denied you boarding after you checked in on time without compensating you, that would be illegal.

Under Department of Transportation regulations, Spirit would have to offer you compensation for being involuntarily denied boarding. The amount of compensation depends on the length of your delay. For a delay of over two hours, for example, you would be entitled to 400% of your one-way fare, not to exceed $1,350.

I asked Spirit about your delay. Although it did not have a record of you arriving at the airport two hours before the flight’s 3:14 p.m. departure time, it did show you tried to check in at its kiosk at 2:32 p.m. A Spirit representative said passengers must have completed the check-in process at least 45 minutes before their flight’s scheduled departure time. Although the 45-minute cutoff is disclosed on Spirit’s site, you say you never received any notification.

Spirit should have taken care of you and your family at the airport. After all, you were at the kiosk two minutes past the cut-off time. How about a little compassion?

You could have appealed to one of the airline’s executives. I list the names, numbers and email addresses of Spirit’s customer service managers on my consumer advocacy site, elliott.org.

In response to my inquiry, Spirit said it would refund your $99 rebooking fee for the next available flight. It also offered you a $50 flight voucher as a courtesy. “We’ve shared the customer service the guest experienced with the general manager in Philadelphia for review and additional training purposes, as we’re always looking to improve,” a representative told me.

Christopher Elliott is the ombudsman for National Geographic Traveler magazine and the author of “How to Be the World’s Smartest Traveler.” You can read more travel tips on his blog, elliott.org, or email him at chris@elliott.org.