Cheapest 100LL Avgas in Washington
18 FBOs with 100LL pricing · Updated daily
The average 100LL price in Washington is $8.45/gal. Below are all FBOs ranked from cheapest to most expensive.
Prices updated daily · Last updated June 14, 2026
| # | FBO | Airport | Jet-A | 100LL |
|---|---|---|---|---|
| 1 | Safety-in-Motion Flight CenterBest Price | KOLM | $7.02 | $6.88 |
| 2 | Skyport Aviation | KTIW | $7.75 | $7.25 |
| 3 | Signature Aviation | KBFI | $7.59 | $7.35 |
| 4 | Pavco Flight Center | KTIW | $7.44 | $7.72 |
| 5 | Avian Flight Center, Inc. | KPWT | $8.24 | $8.14 |
| 6 | Skyservice Seattle | KBFI | $7.02 | $8.21 |
| 7 | Arlington Flight Services, Inc. | KAWO | $7.51 | $8.26 |
| 8 | Bellingham Aviation Services | KBLI | $7.72 | $8.29 |
| 9 | Million Air Moses Lake | KMWH | $8.35 | $8.39 |
| 10 | Glacier Jet Center | KOLM | $7.84 | $8.64 |
| 11 | McCormick Air Center | KYKM | $8.19 | $8.69 |
| 12 | Modern Aviation | KBFI | $7.17 | $8.70 |
| 13 | Bergstrom Aircraft, Inc. | KPSC | $8.97 | $8.82 |
| 14 | Propeller Aero Services FBO | KPAE | $7.56 | $8.99 |
| 15 | Citizen Air, LLC | KCLM | $7.99 | $9.00 |
| 16 | Signature Aviation | KGEG | $8.52 | $9.23 |
| 17 | Aero Center Felts Field | KSFF | $9.05 | $9.73 |
| 18 | Aero Center Spokane | KGEG | $8.80 | $9.73 |
100LL Avgas Market Analysis in Washington
We track 100LL avgas at 18 FBOs across 13 airports in Washington. The cheapest 100LL is $6.88/gal at Safety-in-Motion Flight Center (KOLM), and the highest is $9.73/gal — a $2.85/gal difference depending on where you stop. 9 FBOs are below the $8.45/gal state average. For a typical 50-gallon piston top-off, the cheapest stop saves roughly $78 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.