Southwest Airlines is taking aim at US Airways as it expands at Logan International Airport.
Southwest will offer five daily flights, expanding its current service from Logan to Baltimore and Chicago's Midway Airport.
Airline spokesman Brad Hawkins said Southwest is aggressively courting business fliers currently using US Airways, which has a hub in Philadelphia. Some passengers currently pay walkup fares exceeding $1,000.
Southwest is working with the Massachusetts Port Authority to add a third gate at Logan's Terminal E to support the new service this summer.