Cheapest 100LL Avgas in Wisconsin
14 FBOs with 100LL pricing · Updated daily
The average 100LL price in Wisconsin is $7.24/gal. Below are all FBOs ranked from cheapest to most expensive.
Prices updated daily · Last updated October 12, 2026
| # | FBO | Airport | Jet-A | 100LL |
|---|---|---|---|---|
| 1 | Avflight Green BayBest Price | KGRB | $6.99 | $6.55 |
| 2 | East Metro Aviation | KRNH | $7.99 | $6.64 |
| 3 | Jet Air Group | KGRB | $6.95 | $6.75 |
| 4 | Ascension FBO Network | KEAU | $9.49 | $6.99 |
| 5 | Wisconsin Aviation-Madison | KMSN | $7.25 | $6.99 |
| 6 | Hayward Aviation | KHYR | $8.43 | $7.11 |
| 7 | Ovation CWA, LLC | KCWA | $8.59 | $7.19 |
| 8 | Basler Flight Service | KOSH | $6.89 | $7.19 |
| 9 | AVP/Kenosha Aviation, LLC | KENW | $6.50 | $7.29 |
| 10 | Jet Aviation | KMKE | $6.24 | $7.38 |
| 11 | Avflight Milwaukee | KMKE | $7.33 | $7.40 |
| 12 | Appleton Flight Center | KATW | $8.40 | $7.48 |
| 13 | Colgan Air Services | KLSE | $8.16 | $7.56 |
| 14 | Signature Aviation | KMKE | $7.06 | $8.79 |
100LL Avgas Market Analysis in Wisconsin
We track 100LL avgas at 14 FBOs across 11 airports in Wisconsin. The cheapest 100LL is $6.55/gal at Avflight Green Bay (KGRB), and the highest is $8.79/gal — a $2.24/gal difference depending on where you stop. 8 FBOs are below the $7.24/gal state average. For a typical 50-gallon piston top-off, the cheapest stop saves roughly $34 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.