I'm an AA flyer, so I'm not sure if this works the same on DL.

My niece has a RT FLL-JFK-FLL and will miss the FLL-JFK segment, but wants to use the JFK-FLL return. Will her ticket cancel if she misses the first leg (as it does on AA)?

The ticket costs just a few dollars more than the $200 change fee listed on the DL website.

Any suggestions on how best to proceed? I was thinking of changing her ticket to a one-way, but if that still incurs the change fee, it's cheaper to buy a new ticket.

Also, her ticket is on the same PNR with other family members, who will make the outbound. Will one pax missing the outbound cause issues for the others?

Thanks!