I booked flights for my family and later some decided they weren't coming. I have free cancellation as a diamond member so I made another booking with the correct number of people. After a few days I went to cancel the original flight. I wasn't able to do it online as I usually can, i assumed because it was an international flight. But I was able to cancel through a chat agent. I received cancellation email and everything seemed fine. Today I received a notice from my credit card that I was receiving a refund from frontier that I wasn't expecting. Frontier has cancelled the flights I wanted to keep too, but didn't notify me at all about those. I am on the phone with an agent now who says she can see that I cancelled the unneeded flights and later AFTER that the "back office" noticed a duplicate booking and cancelled the flights I wanted to keep too. Currently on hold trying to see if anything can be done but I don't have a lot of faith. Any suggestions here or am I SOL? At least I figured this out in advance. No notification from Frontier seems especially shady.

This happened to me before. The system automatically cancels duplicate bookings I was told, so both reservations were cancelled by the system. I get cancelling one of them if it appears to be a duplicate, but doesnt make sense to cancel both. But frontier IT Fortunately it was far enough in advance and another sale popped up that I was able to book. Came out cheaper than the original.

I was also told for security reasons, once they cancel a booking, they cant un-cancel it. Not sure how accurate that is, but I would plan on a needing to make a new booking.

Thanks that does make sense! Luckily Frontier did agree to make a new booking for me! The first call I was on they tried to transfer me to "customer relations" but that led to a dead line so I called back and spoke with another agent who was gone talking to a supervisor for a long time and they agreed to rebook me citing "agent error". It took a while but glad they worked it out. I am still a bit nervous there will be a problem with my new reservation when I show up at the airport but fingers crossed!

If you have a confirmation number, you should be good. I wouldnt worry about that.

Make sure your reservation shows as being paid on F9's site or app and you should be good. If it shows a balance due, that's trouble waiting to happen.