In real life,
- The only regularly scheduled flights to Tinian are made from Saipan, which is currently impossible to schedule in game due to the short distance between the two airport
- The only regularly scheduled flight out of Rota International Airport to point outside Northern Mariana is to Guam, which is currently impossible to schedule in game due to the short distance between the two airport
Please exempt those airports from the restriction in order to allow those flights to be scheduled.