United Airlines will start in December using its Boeing 737-700 planes to serve Key West. The larger plane carries 126 passengers, compared to the former 70-seat regional jets. LASTA29/United Airlines

United Airlines will increase seat capacity beginning in December by operating 126-seat Boeing 737-700 aircraft to its hubs in Chicago, Houston, Newark and Washington (Dulles). United began serving Key West in December 2016 with service to Newark on 70-seat regional jets and expanded in subsequent years to other hubs using regional jets, but this marks the first time United will operate the larger mainline 737s at Key West.  

United will serve Chicago, Houston and Washington with one daily flight and Newark with two daily flights – one with the Boeing 737 and one with the 70-seat Embraer 170, for a total of five daily flights at Key West. 

United’s seat capacity will increase 78.7% in first quarter 2024 compared to first quarter 2023, and the number of flights will increase 10.4%.  

“We have worked with United Airlines for the last three years to get this aircraft into the Key West market. This is fantastic, wonderful news,” said Richard Strickland, executive director of airports for Monroe County. “We are looking forward to a strong 2024.”  

JetBlue Airways will resume its seasonal service to Key West in late October with nonstop service to Boston on the 140-seat Airbus A220-300. 

In November, American Airlines will be adding a second daily flight to Washington’s Reagan National Airport on the 76-seat Embraer 175, and Delta Air Lines will launch a new daily flight to New York’s LaGuardia Airport beginning in December, also on the 70-seat Embraer 170.