Here's a flip side of married segments - June 9th, LAS-MIA flight 2341 (the redeye) is only available with an anytime award of 50k miles. But LAS-MIA-TPA or LAS-MIA-EYW are available as anytime awards at 30k. Yes, there is a risk of a re-route through some other hub instead of Miami, and won't work if I want to check luggage, but that's a fairly large Delta.
