AS and AA
have traditionally had much better award availability. DL
's can often be non-existent.
has the benefit of having partners in multiple alliances, such as QF
, and a few not in an alliance such as HU
One downside to AS
's program is that their partners may release fewer awards to them. I saw this first hand recently. On certain dates in October, the SEA
was available round trip for like 67,000 miles if you had DL
miles. For AS
miles, the SEA
portion wasn't available and the remaining options, mostly on AA
were not good.
I think it also depends on where you live. If you live in ANC
, then AS
is your best bet. If you live in MSP
might be the choice.