Summertime travel often involves taking a flight to a special destination, and Delta Air Lines is one of the biggest airlines in the U.S. According to Simple Flying, as of February, Delta was the No. 2 largest airline in the U.S. by flights with 4,266 average roundtrip flights per day, only second to American, with 5,625 average roundtrip flights per day. According to the tally, Delta is also the No. 2 largest airline in the world.
As the years progress, airlines often add and delete routes,…















