Best to schedule your return trip several days after you think you'll leave the hospital, to allow for any of the usual complications after surgery.
John was told to expect a 4- to 6-day hospital stay. I scheduled the surgery for a Thursday, hoping I could be back at work Tuesday or Wednesday. He developed an arrhythmia, which bought him a couple of extra days in the hospital. So, I would allow a couple of extra days' cushion time.
I don't think the flight per se will be a problem. Do ask the airline (I assume you'd be on United or American from DEN to DFW) for a wheelchair. You may NOT need it, but hey, you deserve a little TLC. I would probably book a bulkhead seat, so you'd have room to stretch your legs. It's not that long of a trip, thank heavens.
If your husband & kids need to fly home ahead of you, TSA & airline regs do allow for a non-flying family member to escort you to the gate. The airline will give you paperwork & a pass to get through the security checkpoint. The pass is marked for a non-passenger; you won't be able to board a plane.
BTW, we're going to Presby next Monday for John's post-op checkup.
Marsha (7-28-50), MVP 1990/MVR (St. Jude) & ASD repair 6/24/03 Baylor University Medical Center, Dallas Texas. Hometesting since 11/03, first with ProTime 3, now with INRatio.
John (3-13-46), MV repair 5/10/07, Dallas Presbyterian, port-access incision, Dr. William Ryan. Chordae ruptured 12/05 in car crash.