Cheapest 100LL Avgas in Washington
18 FBOs with 100LL pricing · Updated daily
The average 100LL price in Washington is $8.69/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 | Safety-in-Motion Flight CenterBest Price | KOLM | $7.02 | $7.31 |
| 2 | Pavco Flight Center | KTIW | $7.21 | $7.88 |
| 3 | Glacier Jet Center | KOLM | $7.12 | $7.95 |
| 4 | Skyport Aviation | KTIW | $7.39 | $8.00 |
| 5 | McCormick Air Center | KYKM | $8.40 | $8.05 |
| 6 | Arlington Flight Services, Inc. | KAWO | $7.51 | $8.26 |
| 7 | Bellingham Aviation Services | KBLI | $8.49 | $8.54 |
| 8 | Bergstrom Aircraft, Inc. | KPSC | $8.79 | $8.74 |
| 9 | Avian Flight Center, Inc. | KPWT | $8.83 | $8.76 |
| 10 | Signature Aviation | KBFI | $8.19 | $8.85 |
| 11 | Skyservice Seattle | KBFI | $7.85 | $8.95 |
| 12 | Million Air Moses Lake | KMWH | $9.11 | $8.98 |
| 13 | Citizen Air, LLC | KCLM | $7.99 | $9.00 |
| 14 | Modern Aviation | KBFI | $7.92 | $9.04 |
| 15 | Signature Aviation | KGEG | $9.43 | $9.10 |
| 16 | Propeller Aero Services FBO | KPAE | $8.49 | $9.20 |
| 17 | Aero Center Felts Field | KSFF | $9.45 | $9.93 |
| 18 | Aero Center Spokane | KGEG | $9.25 | $9.93 |
100LL Avgas Market Analysis in Washington
We track 100LL avgas at 18 FBOs across 13 airports in Washington. The cheapest 100LL is $7.31/gal at Safety-in-Motion Flight Center (KOLM), and the highest is $9.93/gal — a $2.62/gal difference depending on where you stop. 7 FBOs are below the $8.69/gal state average. For a typical 50-gallon piston top-off, the cheapest stop saves roughly $69 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.