Going to somewhere that is 90 kilometers away from your home makes you a traveler. It doesn’t matter if you go by car, plane or walking. You can benefit from the permission of traveling.
Fasting is a duty for everyone. However, Allah has given permission to travelers and sick people to postpone their fasting duties to other days after Ramadan. But He also advised these people to fast in Ramadan, as it would be more difficult to fast after it. He commands:
“Fast for a certain number of days. Whoever among you is sick or on a journey, should fast the same number some other days. For those who can endure to fast it, a fee to feed a desperate person is needed. Who does good with a willing heart, it is better for him. But to fast is better for you, if you only knew.” (2:184)