We were recently considering a Rick Steves Turkey tour, but haven’t yet made the commitment. Your flight situation was intriguing, so just looked up possibilities on Rome2Rio.com.
How about Salt Lake City? I realize it’s a 4 1/2 hour drive between there and St. George, but a flight is just over an hour. If you’re not completely opposed to flying via Salt Lake City, this itinerary came up:
Fly TUI Airlines Netherlands from Izmir at 12:20 PM, arriving at Amsterdam at 3:25 PM (4 hr, 5 min flight)
Two hours and 5 minute layover later, fly KLM to Salt Lake (depart 5:30PM, arrive 7:30PM , 10 hour flight)
Assuming there was no issue making the connection at the Amsterdam airport, and that the KLM flight reaches Salt Lake on time, and (this could be the catch in this plan) you can make the 8:45 PM Delta flight to St. George, you’d be back at your home airport at 10:05 PM, no need to stay overnight anywhere on the way home. If you’d driven to Salt Lake to get to Turkey, paid to park at SLC, and had the energy to drive straight home, you’d be looking at getting home sometime after midnight.
Being able to make that 8:45 flight (would partners KLM & Delta make sure you could connect in Salt Lake City - if you got thru the Salt Lake immigration control?) might be the toughest part of this, along with arriving home nearly 24 hours after you’d first gotten to the Izmir airport to start the return journey. If it was doable, that could beat 10-20 hour layovers, and a potential airport hotel night.