California and Nevada
Heroica Nogales, in the Mexican state of Sonora. It is just across the border to Nogales, AZ.
No, but there is one about five miles away from the CA border in Yuma, AZ.
Almost no time at all since they share a common border.
There are many cities that not only are at an international border, but are actually on both sides of the border. For example, Gorizia (Italy) and Nova Gorica (Slovenia).
Arizona and California border each other, so it would depend on where you start from and where you go to.
No but it's close. There are 2 states that border CA to the East, AZ & NM. Utah is wedged between them to the east-see below.
Arizona ("AZ") lies in the southwestern United States, on the border with Mexico.
Montezuma county is the closest county in Colorado to Arizona.
Kingman Airport - Kingman, AZ (IGM / KIGM)
Ernest A. Love Field - Prescott, AZ (PRC / KPRC)
Page Municipal Airport - Page, AZ (PGA / KPGA).