The following airlines serve Harrisburg MDT Airport.
- ABX Air
- Air Canada
- Air France
- AIR GEORGIAN
- Air Wisconsin
- Alaska Airlines
- Allegheny Airlines, Inc.
- American
- American Eagle
- Atlantic Southeast
- Comair
- CommutAir
- Continental
- Delta
- Express Airlines
- Fedex
- Flight Options
- JAL
- Jet Link
- KLM
- Lufthansa
- Mesa Airlines
- Northwest
- Trans State Airlines
- United
- UPS
- US Airways