DALLAS, Dec. 11, 2019 /PRNewswire/ -- Southwest Airlines Co. (NYSE: LUV) today extends its bookable flight schedule through Aug. 10, 2020. As part of the schedule extension, Southwest also announces plans to bring new service to some of the largest cities across its network including: Atlanta, Baltimore/Washington, Chicago (Midway), Denver, Houston (Hobby), and Nashville. Atlanta

Effective June 7, 2020, Southwest will fly seasonal service daily between:

Atlanta and Charleston, S.C.

Atlanta and Panama City, Fla.

Atlanta and Norfolk, Va.

With these new additions, the carrier will operate 135 weekday departures during the summer, the most weekday flights ever offered by Southwest from Atlanta. Baltimore/Washington

Effective June 7, 2020, the carrier will add seasonal service between:

Baltimore/Washington and Pensacola, Fla.

Baltimore/Washington and Tulsa, OK

Southwest's summer schedule from Baltimore now will peak at 248 weekday departures, an increase of 11 flights. This is also the most departures the carrier has ever offered Baltimore travelers. Chicago

Southwest is strengthening its position at Chicago Midway by adding flights across routes already served. The summer schedule will see the carrier offering up to 260 flights, an increase of 14 flights. Denver

The carrier is adding flight frequencies in Denver to give travelers more options. In May, the airline will operate 240 weekday departures before increasing weekday departures to 249 in June, the most flights Southwest has ever operated from Denver. Houston (Hobby)

Southwest is expanding its international options from Houston with nonstop service seasonally between Houston and Nassau, The Bahamas, available on Saturdays beginning June 13, 2020, subject to requisite government approvals. This will be the carrier's second announcement of new international destinations from Houston this year, as it previously announced twice-daily service between Houston and Cozumel will begin on March 7, 2020, subject to requisite governmental approvals. The carrier is also adding flights on routes already served from Houston to offer 191 weekday departures in summer 2020. Nashville

In Nashville, the carrier is adding several new destinations with nonstop service on Saturdays seasonally between:

Nashville and Portland, Maine

Nashville and San Juan, Puerto Rico

Nashville and Portland, Ore. Finally, Southwest also will offer new seasonal service linking Kansas City, Mo. and Charleston, S.C. The Saturday-only service will begin June 13, 2020. These flights, as well as the carrier's more than 4,000 daily flights, are now available for sale at Southwest.com. ABOUT SOUTHWEST AIRLINES CO. In its 49th year of service, Dallas-based Southwest Airlines Co. (NYSE: LUV) continues to differentiate itself from other air carriers with exemplary Customer Service delivered by more than 60,000 Employees to a Customer base topping 130 million passengers annually. Southwest became the nation's largest domestic air carrier in 2003 and maintains that ranking based on the U.S. Department of Transportation's most recent reporting of domestic originating passengers boarded. In peak travel seasons, Southwest operates more than 4,000 weekday departures among a network of 101 destinations in the United States and 10 additional countries. Southwest coined Transfarency® to describe its purposed philosophy of treating Customers honestly and fairly, and low fares actually staying low. Southwest is the only major U.S. airline to offer bags fly free® to everyone (first and second checked pieces of luggage, size and weight limits apply, some carriers offer free checked bags on select routes or in qualified circumstances), and there are no change fees, though fare differences might apply. Southwest is one of the most honored airlines in the world, known for a triple bottom line approach that contributes to the carrier's performance and productivity, the importance of its People and the communities they serve, and an overall commitment to efficiency and the planet. Learn more about how the carrier gives back to communities across the world by visiting Southwest.com/citizenship. Book Southwest Airlines' low fares online at Southwest.com or by phone at 800-I-FLY-SWA. View original content:http://www.prnewswire.com/news-releases/start-summer-vacation-planning-today-southwest-airlines-extends-flight-schedule-through-august-10-2020-300973235.html SOURCE Southwest Airlines Co.