- My experience with United Airlines ASM Terminal was seamless and efficient. The terminal was modest but easy to use, and the check-in process went quickly owing to the helpful and polite staff. The security lines went quickly, and the boarding process was well-organized. While the terminal's amenities were minimal, the clean and calm environment made for an enjoyable trip. Overall, United Airlines delivered dependable service at ASM, assuring a pleasant and stress-free beginning to my journey.