Cheapest 100LL Avgas in Washington
18 FBOs with 100LL pricing · Updated daily
The average 100LL price in Washington is $8.48/gal. Below are all FBOs ranked from cheapest to most expensive.
Prices updated daily · Last updated July 29, 2026
| # | FBO | Airport | Jet-A | 100LL |
|---|---|---|---|---|
| 1 | Safety-in-Motion Flight CenterBest Price | KOLM | $7.02 | $7.31 |
| 2 | Skyport Aviation | KTIW | $7.00 | $7.40 |
| 3 | Pavco Flight Center | KTIW | $5.92 | $7.43 |
| 4 | Glacier Jet Center | KOLM | $6.79 | $7.95 |
| 5 | McCormick Air Center | KYKM | $7.53 | $8.05 |
| 6 | Avian Flight Center, Inc. | KPWT | $7.45 | $8.15 |
| 7 | Bellingham Aviation Services | KBLI | $7.59 | $8.18 |
| 8 | Arlington Flight Services, Inc. | KAWO | $7.51 | $8.26 |
| 9 | Skyservice Seattle | KBFI | $6.90 | $8.45 |
| 10 | Million Air Moses Lake | KMWH | $8.47 | $8.48 |
| 11 | Bergstrom Aircraft, Inc. | KPSC | $8.48 | $8.62 |
| 12 | Modern Aviation | KBFI | $7.03 | $8.82 |
| 13 | Signature Aviation | KBFI | $7.26 | $8.85 |
| 14 | Citizen Air, LLC | KCLM | $7.99 | $9.00 |
| 15 | Signature Aviation | KGEG | $8.47 | $9.10 |
| 16 | Propeller Aero Services FBO | KPAE | $7.56 | $9.28 |
| 17 | Aero Center Spokane | KGEG | $8.38 | $9.58 |
| 18 | Aero Center Felts Field | KSFF | $8.95 | $9.72 |
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 $9.72/gal — a $2.41/gal difference depending on where you stop. 9 FBOs are below the $8.48/gal state average. For a typical 50-gallon piston top-off, the cheapest stop saves roughly $58 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.