Knox County Airport
4I3 has 1 runway. The longest is 10/28 at 5,504 ft × 100 ft (asphalt).
FAA NASR data, cycle 2026-09-03
4I3 field elevation is 1,191 ft MSL. The published traffic pattern altitude at 4I3 is 2,000 ft MSL (808 ft AGL). Fuel available at 4I3: 100LL, Jet A+.
FAA NASR data, cycle 2026-09-03
CTAF 123.05 MHz — 4I3 is non-towered; self-announce position and intentions on CTAF.
Check K4I3 against your personal minimums, plan a route to it, and see the best runway for the current wind — free.
No, 4I3 is a non-towered airport. The CTAF frequency is 123.05 MHz.
The AWOS frequency at 4I3 (Knox County Airport) is 118.425 MHz.
4I3 has 1 runway (10/28). The longest runway is 5,504 feet.
4I3 publishes a traffic pattern altitude of 808 feet AGL — about 2,000 feet MSL — which is not the standard 1,000 feet.
Yes. 4I3 (Knox County Airport) has 100LL, Jet A+ available. Call the field for hours, self-serve availability and price.
4I3 (Knox County Airport) has a field elevation of 1,191 feet MSL.
4I3 (Knox County Airport) is located in Mount Vernon, OH.