The Firefly was a named passenger train of the St. Louis – San Francisco Railway. At various times, it served St Louis, Missouri, Tulsa

Tulsa, Oklahoma

Tulsa is the second-largest city in the state of Oklahoma and 46th-largest city in the United States. With a population of 391,906 as of the 2010 census, it is the principal municipality of the Tulsa Metropolitan Area, a region with 937,478 residents in the MSA and 988,454 in the CSA. Tulsa's...

 and Oklahoma City, Oklahoma

Oklahoma City, Oklahoma

Oklahoma City is the capital and the largest city in the state of Oklahoma. The county seat of Oklahoma County, the city ranks 31st among United States cities in population. The city's population, from the 2010 census, was 579,999, with a metro-area population of 1,252,987 . In 2010, the Oklahoma...

, Kansas City, Missouri

Kansas City, Missouri

Kansas City, Missouri is the largest city in the U.S. state of Missouri and is the anchor city of the Kansas City Metropolitan Area, the second largest metropolitan area in Missouri. It encompasses in parts of Jackson, Clay, Cass, and Platte counties...

, and Fort Scott, Kansas

Fort Scott, Kansas

Fort Scott is a city in and the county seat of Bourbon County, Kansas, United States, south of Kansas City, on the Marmaton River. As of the 2010 census, the city population was 8,087. It is the home of the Fort Scott National Historic Site and the Fort Scott National...

.

The SLSF introduced the Firefly on December 10, 1939 over the Kansas City—Tulsa—Oklahoma City route. The Firefly was the Frisco's first streamliner

Streamliner

A streamliner is a vehicle incorporating streamlining in a shape providing reduced air resistance. The term is applied to high-speed railway trainsets of the 1930s to 1950s, and to their successor "bullet trains". Less commonly, the term is applied to fully faired recumbent bicycles...

, intended to compete with the Santa Fe

Atchison, Topeka and Santa Fe Railway

The Atchison, Topeka and Santa Fe Railway , often abbreviated as Santa Fe, was one of the larger railroads in the United States. The company was first chartered in February 1859...

. The train's last run between Fort Scott and Tulsa took on place on 22 May 1960; between Fort Scott and Kansas City it ran combined with the Sunnyland. The Firefly was the last Frisco train serving the Tulsa-Fort Scott route.