Southwest Airlines Cancels All Routes From Major US Airport: See Affected Flights Now

Published Sep 21, 2026, 3:00 PM EDT Prachi is a London-based journalist with extensive experience in the aviation industry. She has worked for several leading industry publications, covering a broad range of topics. Her expertise lies in aircraft maintenance, emerging technologies, and advanced air mobility. She is currently pursuing a PhD in Journalism, focusing on data journalism and its potential to transform conventional aviation reporting. Southwest Airlines is one of the major airlines in the United States. Currently, the airline is making significant changes to its business and network as it works to improve its financial performance. The carrier has introduced assigned seating and extra-legroom seats, changed its boarding model, and added new revenue streams, including checked bag fees. It has also been reviewing its network, adding capacity in some markets while reducing its presence in others. The changes have already seen Southwest leave two major US airports. On June 4, the airline ended its service at Chicago O'Hare International Airport (ORD) after five years of operations there. It also left Washington Dulles International Airport (IAD) on the same day, ending a presence that had lasted for nearly two decades. Southwest’s Washington Dulles Operation Fell To Just Two Routes Credit: Ceri Breeze | Shutterstock Southwest began operating from Washington Dulles International Airport on October 5, 2006. The airline launched the service with 12 daily nonstop flights to four destinations: Chicago Midway, Las Vegas, Orlando, and Tampa. The network expanded over the following years; the airline added destinations including Denver, Phoenix, and Atlanta. It also operated flights from Dulles to Fort Lauderdale and San Diego at different points, but the operation gradually became much smaller. By the start of 2026, Southwest was serving only two destinations from Dulles: Denver and Phoenix. The airline operated two daily flights to Denver and one daily flight to Phoenix before ending its Dulles service altogether on June 4. Overall, according to US Department of Transportation data, Southwest recorded an average load factor of 77.2% across its Dulles operation from the beginning of its service through the end of 2025. Loading map… Drag to explore Southwest Is Consolidating Its Washington Flights At BWI And DCA Credit: Jeramey Lende | Shutterstock Southwest said its decision to leave Dulles was part of its “ongoing efforts to refine its network.” The move makes sense. The airline’s position in the Washington area has changed considerably since it began flying from Dulles in 2006, particularly after its acquisition of AirTran Airways gave it access to a larger operation at Ronald Reagan Washington National Airport (DCA). AirTran already operated at DCA, and Southwest began converting those flights to its own operation in 2012. The airline later expanded its presence at Reagan further after acquiring additional slots in 2014. That left Southwest with a much stronger position at the other two airports serving the Washington area. Baltimore/Washington International Thurgood Marshall Airport (BWI) is by far its largest operation in the region, where it held a 76.7% share of two-way weekly seats, according to OAG data cited by Aviation Week. At DCA, Southwest was the second-largest carrier after American Airlines, with a 15.2% share. The airline had a very small share of seats at Dulles, leaving little reason for it to maintain a separate operation there when it already had a much larger presence elsewhere in the region. Destination Last operated at IAD Current flights from Washington-area airports* Chicago Midway (MDW) 2024 Up to seven daily from BWI; up to six daily from DCA Las Vegas (LAS) 2017 Three to four daily from BWI; one daily from DCA Orlando (MCO) 2023 Up to 11 daily from BWI; three daily from DCA Tampa (TPA) 2011 Up to seven daily from BWI; one to two daily from DCA Denver (DEN) 2026 Up to seven daily from BWI Phoenix (PHX) 2026 Up to four daily from BWI Atlanta (ATL) 2025 Up to five daily from BWI; Up to three daily from DCA Fort Lauderdale (FLL) 2020 Up to five daily from BWI; one daily from DCA San Diego (SAN) 2017 Up to three daily flights from BWI The move therefore consolidates its Washington-area flying around BWI and DCA, particularly its much larger BWI operation, rather than spreading a small schedule across three airports. Southwest has said the Dulles exit would not significantly change its overall service to the Washington-Baltimore market, with up to 271 daily departures to 79 nonstop destinations from BWI and DCA combined. Southwest’s O’Hare Exit Follows A Similar Strategy Credit: John Gress Media Inc | Shutterstock Furthermore, Southwest’s exit from Chicago O’Hare earlier this year was similar to what happened at Dulles. The airline said operating at O’Hare remained “challenging” and pointed to Chicago Midway, where it has had a much larger presence for decades. It said its Midway schedule would continue to serve more than 80 destinations, including the 15 markets it had been serving from O’Hare. The airline also said the move would not significantly change the number of Southwest flights available across the Chicago area. Southwest's operation at O’Hare had already become relatively small. The budget carrier held only around 1.7% of the airport’s seats. Before leaving, it flew to about 15 destinations, including Orlando, Las Vegas, Phoenix, Austin, Nashville, Cancun, Dallas Love Field, Denver, Fort Lauderdale, Fort Myers and Tampa. Midway is a very different operation for Southwest, with more than 240 daily departures and a much larger network. This meant the airline could drop its O’Hare flights while continuing to serve the same markets from Midway. The Dulles and O’Hare exits therefore left Southwest with fewer airports to cover in both markets, while its larger operations at BWI and Midway remained in place.