A few Delta Airlines employees think a flight from Albuquerque to the East Coast is an international trip.Santa Fe resident Jack Sullivan showed several copies of emails that told him his flight from the Sunport to Pennsylvania would have to go through their Mexico office.“My wife and I are planning to go back to Pennsylvania to visit family,” Sullivan said.Like many people, Sullivan always looks for the best deal when he travels, and when he noticed the cost to fly to Pennsylvania dropped after he booked his flight, he asked Delta Air Lines about making changes so he could save a few bucks.“Two different agents mentioned that international travel was involved,” Sullivan said.He wasn't planning on bringing his passport along, but according to two different Delta employees, he might have to.The emails form those Delta employees referred him to their office in Mexico.“It's true, New Mexico is the 47th state, so we were a little late getting in, but we've been a state for 104 years,” Sullivan said.Sullivan replied to both emails and explained that New Mexico is, in fact, part of the United States, and it seems as though the third time was the charm.“They finally had a third agent get back to me and seemed to understand that we were no longer in Mexico,” Sullivan said.The agent explained he couldn't get the savings he initially called about, but Sullivan will still be on the Delta flight next month and said he'll bring his passport, just in case.“I certainly hope that when we come back to Albuquerque, the pilot knows where Albuquerque is, and we don't end up in Mexico,” Sullivan said.A Delta spokesperson said the confusion may have been due to the high number of calls and emails Delta agents were getting during their massive computer outage earlier this week. He said the airline will reach out and apologize to Sullivan.