Prosser Flag & Flight Festival at the Prosser Airport

Prosser Flag & Flight Festival 2026 poster

The Prosser Flag & Flight Festival is a weekend aviation and community celebration happening June 13–14, 2026. The event features an aviation fly-in with airplanes, hot air balloons, helicopters, and drones, along with displays, food, kids’ activities, and a farmer’s market swap meet. A keynote presentation will be given by Greg “Boss” Wooldridge, a three-time Blue Angels commander. Special perks include limited camping for fly-in visitors and commemorative coins for the first 100 aircraft that fly-in.

Great Prosser Balloon Rally

Colorful hot air balloons at sunrise rally.

The 37th annual Great Prosser Balloon Rally will take to the skies September 25-27, 2026, at the Prosser Airport. Early morning launches fill the sky with color as sunrise comes over the Horse Heaven Hills and the Yakima River. Join the balloons on the field to watch the pilots and crews inflate the balloons, then follow along on their flight to wherever the wind takes them. All launches are weather permitting! See full event details at the event website.