Spirit Airlines announced Thursday that it will start flying from BWI Thurgood Marshall Airport to Boston and Detroit next spring.
The nonstop service between Baltimore/Washington International and Boston Logan International Airport and Detroit Metropolitan Airport is scheduled to start on April 21. Boston and Detroit will be the 11th and 12th markets served by Spirit from BWI.
The low-fare carrier recently announced that it would start service between BWI and Orlando in January.
"We welcome this further expansion from Spirit Airlines," BWI CEO Ricky Smith said. "Spirit continues to add ultra-low fare service at BWI Marshall, which means more travel flexibility and convenience for our customers."
The airline moved to BWI from Reagan National Airport in September 2012 with flights to two destinations, Fort Lauderdale and Dallas/Fort Worth.
Spirit will make two daily roundtrip flights between BWI and Boston, and one daily roundtrip flight between BWI and Detroit.