Seattle, Washington

BFI

King County Intl Airport (Boeing Field)

Seattle-Tacoma, Washington

SEA

Seattle-Tacoma Intl Airport

Sheridan, Wyoming

SHR

Sheridan County Airport

Shreveport, Louisiana

SHV

Shreveport Regional Airport

Sidney, Montana

SDY

Sidney-Richland Municipal Airport

Sioux City, Iowa

SUX

Sioux Gateway Airport (Col. Bud Day Field)

Sioux Falls, South Dakota

FSD

Sioux Falls Regional Airport (Joe Foss Field)

Sitka, Alaska

SIT

Sitka Rocky Gutierrez Airport

South Bend, Indiana

SBN

South Bend Regional Airport

Spokane, Washington

GEG

Spokane Intl Airport (Geiger Field)

Springfield, Illinois

SPI

Abraham Lincoln Capital Airport

Springfield, Missouri

SGF

Springfield-Branson Regional Airport

St. Cloud, Minnesota

STC

St. Cloud Regional Airport

St. George, Utah

SGU

St. George Municipal Airport

St. Louis, Missouri

STL

Lambert-St. Louis Intl Airport

St. Petersburg, Florida

PIE

St. Petersburg-Clearwater Intl Airport

State College, Pennsylvania

UNV

University Park Airport

Stockton, California

SCK

Stockton Metropolitan Airport

Syracuse, New York

SYR

Syracuse Hancock Intl Airport

Tallahassee, Florida

TLH

Tallahassee Regional Airport

Tampa, Florida

TPA

Tampa Intl Airport