It also doesn't make sense domestically within the US. A 5-hour flight from coast to coast is not a particularly efficient use of the A380. The only US domestic

It also doesn't make sense domestically within the US. A 5-hour flight from coast to coast is not a particularly efficient use of the A380. The only US domestic route that may be a fit is Honolulu to somewhere in the middle of the mainland (Denver, Dallas, or someplace like that). It's already used extensively TATL and TPAC.