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Three time zones
5 Time zones will be crossed.
45 time zones
9
There are 15 time zones between Colorado and China.
three>< _
There are 4 time zones in the continental US. Alaska and Hawaii each have their own time zone.
1
It is about 5,900 nautical miles from Hawaii to the center of Thailand.
You would remain in the same time zone and no other time zones would be crossed.
Yes, they have some in Japan, Hawaii, and even in Thailand! And many other countries.
6,580 miles Honolulu International Airport (HNL) to Suvarnabhumi Airport (BKK)