My only goal this year is to fly to Alaska. I've got about 11,000 Delta miles and 15,000 United miles.

I can use some Marriott points and future charges on my Starwood AMEX to reach 25,000 in one of the two FF accounts but probably not both.

Which airline program would you focus one?

Even though I have less Delta miles, I know Delta flies to Anchorage. United doesn't, and I don't think their alliance partners do either (but I could be wrong on that).

And is it even realistic to try and fly from Tulsa to Alaska on an FF reward? I'm aiming for mid to late Sept, which is not the peak season there but it's not the coldest one either. Once you get 25,000 miles, can you realistically expect to get there from Tulsa with FF miles? (I don't know since I've never claimed a flight award)

Any thoughts you might have would be greatly appreciated.

PS: I've looked at starting an Alaska Airlines FF account because their 20,000 threshold looks good. But I'd have to depart from Denver (inconvenient) and i'd have to have 25K if I used one of their partners, right? So I'm thinking Alaska Airlines is not the way to go since I have no miles with them anyway. I've also got old TWA miles in my AAdvantage account but only 6,000 miles there.