Cheapest 100LL Avgas in Wisconsin
14 FBOs with 100LL pricing · Updated daily
The average 100LL price in Wisconsin is $7.07/gal. Below are all FBOs ranked from cheapest to most expensive.
Prices updated daily · Last updated August 25, 2026
| # | FBO | Airport | Jet-A | 100LL |
|---|---|---|---|---|
| 1 | Jet Air GroupBest Price | KGRB | $6.47 | $6.49 |
| 2 | Hayward Aviation | KHYR | $7.55 | $6.55 |
| 3 | Avflight Green Bay | KGRB | $6.49 | $6.55 |
| 4 | East Metro Aviation | KRNH | $6.99 | $6.64 |
| 5 | Wisconsin Aviation-Madison | KMSN | $6.29 | $6.79 |
| 6 | Ovation CWA, LLC | KCWA | $7.79 | $6.89 |
| 7 | Ascension FBO Network | KEAU | $8.59 | $6.99 |
| 8 | Basler Flight Service | KOSH | $6.89 | $7.19 |
| 9 | Jet Aviation | KMKE | $5.92 | $7.25 |
| 10 | AVP/Kenosha Aviation, LLC | KENW | $6.50 | $7.29 |
| 11 | Colgan Air Services | KLSE | $7.47 | $7.30 |
| 12 | Avflight Milwaukee | KMKE | $6.90 | $7.40 |
| 13 | Appleton Flight Center | KATW | $8.40 | $7.52 |
| 14 | Signature Aviation | KMKE | $6.54 | $8.16 |
100LL Avgas Market Analysis in Wisconsin
We track 100LL avgas at 14 FBOs across 11 airports in Wisconsin. The cheapest 100LL is $6.49/gal at Jet Air Group (KGRB), and the highest is $8.16/gal — a $1.67/gal difference depending on where you stop. 7 FBOs are below the $7.07/gal state average. For a typical 50-gallon piston top-off, the cheapest stop saves roughly $29 versus the average.
100LL is the standard fuel for most piston-engine aircraft. Because avgas volumes are smaller than Jet-A, prices are especially sensitive to local supplier logistics and airport traffic. Self-serve pumps usually undercut full-service by a wide margin and are often available 24/7. Figures update daily from AirNav reports.