Challis Airport (IATA: CHL, ICAO: KLLJ, FAA LID: LLJ) is a city-owned public-use airport located one mile (1.6 km) northeast of the central business district of Challis, a city in Custer County, Idaho, United States.

Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, Challis Airport is assigned LLJ by the FAA and CHL by the IATA (which assigned LLJ to Silampari Airport in Indonesia).

Challis Airport covers an area of 149 acres (60 ha) which contains one asphalt paved runway (17/35) measuring 4,600 ft × 60 ft (1,402 m × 18 m). For the 12-month period ending May 22, 2006, the airport had 16,350 aircraft operations, an average of 44 per day: 65% general aviation, 34% air taxi and 1% military.

• List of airports in Idaho

• Challis Airport at Idaho Transportation Department
• Resources for this airport:
  • FAA airport information for LLJ
  • AirNav airport information for KLLJ
  • ASN accident history for CHL
  • FlightAware airport information and live flight tracker
  • NOAA/NWS weather observations: current, past three days
  • SkyVector aeronautical chart, Terminal Procedures