I read an anthology of alternative history and the author of one piece argued the US would of attacked Japan via Aleutians and Northern Pacific. As others have posted a Japanese victory at Midway would of just delayed the inevitable.
I've read extensively on the Aleutians war. That route would be problematic at best. Our commercial airlines who fly high over the Aleutians and ride the gulf stream from Tokyo to Seattle and back are uneventful because the fly far above the weather which is typical of that region: fog and constant storms.
Aviation had not advanced to that point in the 1940's. Even until the mid-1980's, direct flights were becoming common with the workhorse 747's, but refueling stops in Anchorage were even more common with lesser aircraft.
More sorties had to be canceled in the Aleutians theater of operations than were carried out. Japanese resupply of the two Aleutians which they occupied (Attu and Kiska) had to be done almost entirely by submarine. Even fast moving destroyer shuttles from the Japanese Kurile Island base at Parashimaro became too risky by the winter of 1942-43.