2. ACA is the airport code for:

Auckland, New Zealand
Walla, WA
Amarillo, TX
Acapulco, Mexico

3. YYC is the airport code for:

Calgary, Alberta, Canada
Banff, Alberta, Canada
London, Ontario, Canada
Toronto, Ontario, Canada

4. TYS is the airport code for:

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

5. CHO is the airport code for:

Chattanooga, TN
Chicago, IL
Charlotte, NC
Charlottesville, VA

6. BOG is the airport code for:

Boston, MA
Nashville, TN
Brunswick, GA
Bogota, Columbia

7. MSP is the airport code for:

Milwaukee, WI
Minneapolis/St. Paul, MN
Mobile, AL
Myrtle Beach, SC

8. AVL is the airport code for:

Wilkes-Barre/Scranton, PA
Asheville, NC
Paris, France
Walla Walla, WA

9. BON is the airport code for:

Bonaire, Netherlands Antilles
Boise, ID
Bellingham, WA
Brownsville, TX

10. UIO is the airport code for:

Banff, Alberta, Canada
Halifax, Nova Scotia, Canada
Yakima, WA
Quito, Ecuador