Cheapest 100LL Avgas in Idaho
13 FBOs with 100LL pricing · Updated daily
The average 100LL price in Idaho is $8.15/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 | The Flight Line, Inc.Best Price | KBYI | $6.40 | $7.12 |
| 2 | Salmon Air | KSMN | $7.30 | $7.40 |
| 3 | Aero Mark | KIDA | $7.75 | $7.45 |
| 4 | Gem Air LLC | KSMN | $7.58 | $7.76 |
| 5 | Pocatello Avcenter | KPIH | $8.50 | $7.95 |
| 6 | Jackson Jet Center | KTWF | $7.89 | $7.99 |
| 7 | Atlantic Aviation | KSUN | $11.61 | $8.21 |
| 8 | Western Aircraft | KBOI | $7.99 | $8.43 |
| 9 | Hillcrest Aircraft | KLWS | $8.08 | $8.50 |
| 10 | Stancraft Jet Center | KCOE | $9.68 | $8.55 |
| 11 | McCall Aviation | KMYL | $8.68 | $8.61 |
| 12 | Jackson Jet Center | KBOI | $7.99 | $8.99 |
| 13 | Turbo Air | KBOI | $8.01 | $8.99 |
100LL Avgas Market Analysis in Idaho
We track 100LL avgas at 13 FBOs across 10 airports in Idaho. The cheapest 100LL is $7.12/gal at The Flight Line, Inc. (KBYI), and the highest is $8.99/gal — a $1.87/gal difference depending on where you stop. 6 FBOs are below the $8.15/gal state average. For a typical 50-gallon piston top-off, the cheapest stop saves roughly $51 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.