Wittman Regional Airport

KOSH OSH Oshkosh, WI

KOSH is the ICAO code for Wittman Regional Airport (IATA OSH), located in Oshkosh, WI.

Regional airport serving Oshkosh and the Fox Valley, WI, and home to EAA AirVenture, one of the largest aviation events in the world each July.

Airport guide

Wittman Regional Airport is a medium regional airport about 2 miles from downtown Oshkosh. For most of the year it operates as a quiet general aviation and charter hub with straightforward access and minimal congestion. That changes dramatically during EAA AirVenture, held annually in late July through early August. During that week, the airport transforms into one of the busiest in the world, handling over 10,000 aircraft arrivals. If your trip overlaps with AirVenture, expect mandatory NOTAM-based arrival procedures, designated approach corridors, and ground delays measured in hours, not minutes. Book your FBO slot and ground transport well in advance.

Outside of AirVenture week, the airport is an easy place to fly into. There are no slot requirements, ramp access is straightforward, and FBO services are available on the field. PlaneSmart! Charter operates here year-round. The main runway (18/36) is just over 8,000 feet, which handles most mid-size and super-mid jets without restriction.

Getting there

Downtown Oshkosh is about 2 miles from the terminal, a 5 to 10 minute drive. The Fox Valley metro (Appleton, Neenah, Menasha) is 20 to 30 miles north, roughly 30 minutes by car. Milwaukee is 90 miles south, about 1.5 hours. Green Bay is 60 miles north, about 1 hour. During AirVenture week, road congestion around the airport can extend ground transport times significantly. Car rentals are available on site. Rideshare (Uber/Lyft) coverage is generally adequate in Oshkosh outside of event week.