"2 flights, 17 hours total each way, plus 5 hours at connecting point. Back-to-back redeye flights. 1 day at destination and then redeye flights back."
What sort of message are you giving to your workers if you are expecting them to go over 24 hours without the opportunity for proper sleep, but then expecting them to go straight from the airport to work all day, and then fly back without the chance to have any sleep, or even to have a shower and change of clothing?
I think very few people would be in a fit state to work after that schedule, and definitely not be fully productive.