2. COS is the airport code for:

Charlotte, NC
Colorado Springs, CO
Columbus, OH
Columbia, SC

3. MKE is the airport code for:

Kansas City, MO
Melbourne, FL
Modesto, CA
Milwaukee, WI

4. TYS is the airport code for:

Texarkana, AR
Knoxville, TN
Tucson, AZ
Tampa, FL

5. MIA is the airport code for:

Miami, FL
New Kansas City, MO
New Orleans, LA
Milwaukee, WI

6. ACY is the airport code for:

Atlantic City, NJ
Aspen, CO
Watertown, NY
Stockholm, Sweden

7. ART is the airport code for:

Anchorage, AK
Asheville, NC
Watertown, NY
Wilkes-Barre/Scranton, PA

8. LBB is the airport code for:

Lexington, KY
Lima, Peru
Milan, Italy
Lubbock, TX

9. SYD is the airport code for:

Stockholm, Sweden
Sydney, Australia
Copenhagen, Denmark
Vail/Eagle, CO

10. ARN is the airport code for:

Stockholm, Sweden
Ft. Smith, AK
Watertown, NY
Naples, FL