What is interesting about gasoline in Alaska is that it is not blended with ethanol, yet the price seems to be similar to the markets Outside. The ethanol would have to be imported, which means from Brazil, and it is already expensive to import to New Orleans from Brazil not to mention going on up to Alaska.
AK gasoline, basis Anchorage, typically has had (historically) a 10-17 cent transportation premium. This changed in the early days of the pipeline, but began reverting to historical levels, oh, 15-odd years ago. I suspect (but don't know) that the pipe is now more-or-less unidirectional, which would account for this occurrence.