My girlfriend has a roundtrip MSY-IAH-PIT reservation in a few weeks. After we booked the ticket, she found out she would have to come home a few days early. The cost to change the ticket (fee + fare difference) is greater than the cost of booking a one way ticket back to MSY on FL. So the plan is to return on FL and throw away the return segment.

As she is an occasional flier, I wouldn't be normally be worried. However, two weeks later she has an outbound leg on CO again. Is she likely to face any problems from CO because of missing the return?

Thanks all.