Crossing the Atlantic Ocean.
Colombus died believing he had found an all-water route to Asia. He never knew.
Spain did not give Texas to the US, the US took Texas from Spain in a war.
You must travel the Pacific Ocean if you take a "water route" to Alaska from the lower 48.
You can book through a cruise vacation with a stop in the country of Spain. But if you intend on traveling from USA to Spain; I do not know if there is such route. But if ever you are in Spain please do not miss to visit Tenerife.
There are 5,785 kilometers from New York to Madrid on a great circle route.
It will take a week or ten days.
depends on if there are stops or not
about a week (?)
It takes about 7 hours to get to Spain from the US. The time depends on winds, point of departure, and type of aircraft.
Alabama
the lower mississippi river
Less then four months.