The phone number of Grant Aviation Airlines Customer Service is 1888-359-4726. The Grant Aviation Airlines Customer Service is only for fight ticket reservations and urgent inquiries only. For Bethel and Emmonak areas, the customer service number is 907-543-2000. You can also inquire about your flight reservations to the customer service by sending in your booking details to email@example.com. For feedback and log a complaint/report, send your message to firstname.lastname@example.org. Make a note that the email support team takes about 2-3 business day to respond back to your emails.