With a 21.55% market share and operating all ten of the busiest US routes from Boston Logan International Airport (BOS), according to data from the US Department of Transportation, US carrier Delta Air Lines is undeniably one of the most important players at the prominent intercontinental hub. The facility, which has been in operation for over 100 years as of January 2024, has rapidly expanded its international offerings, and Delta has played no small role in that development.