While Jet A prices stabilized in May following two months of sharp increases, the price of 100LL, Mogas, and UL94 continued moving higher nationwide, according to the latest figures from iFlightPlanner.
National Jet A Full Service averaged $8.07 in May, representing an increase of $0.02 (0.3%) compared to April. Excluding Alaska and Hawaii, Lower 48 Jet A Full Service averaged $7.97, with no measurable change compared to April.
National 100LL pricing moved higher in May. 100LL Full Service averaged $7.49, an increase of $0.33 (4.6%) compared to April, while 100LL Self Service averaged $6.33, up $0.32 (5.3%), reflecting an approximate 15% savings where self-serve options are available.
100LL prices increased across all Lower 48 states. The largest jump in prices for 100LL Self Service was in the Southern states, averaging $6.27, up $0.34 (5.8%).
UL94 Self Service averaged $7.29, up $0.17 (2.4%) in May, while Mogas averaged $5.36, up $0.30 (6.0%), with both fuels continuing to show limited availability nationwide.
Regional Highlights for May 2026
- Central: 100LL Full Service averaged $6.78, up $0.34 (5.2%), while 100LL Self Service averaged $5.96, up $0.31 (5.5%). Jet A Full Service averaged $7.14, an increase of $0.18 (2.6%).
- Northwest Mountain: 100LL Full Service averaged $7.59, up $0.34 (4.7%), while 100LL Self Service averaged $6.75, up $0.34 (5.2%). Jet A Full Service averaged $8.06, an increase of $0.14 (1.8%).
- Western Pacific: 100LL Full Service averaged $8.17, up $0.34 (4.3%), while 100LL Self Service averaged $6.93, up $0.35 (5.3%). Jet A Full Service averaged $8.64, an increase of $0.16 (1.9%).
- Southern: 100LL Self Service averaged $6.27, up $0.34 (5.8%). Jet A Full Service averaged $8.05, a decrease of $0.12 (-1.5%).
Six-Month Fuel Price Overview
Over the past six months, national aviation fuel prices have transitioned from relative stability to a period of sustained upward pressure as the war in Iran continues.
National 100LL Full Service rose from $6.34 to $7.49, an increase of $1.15 (18.1%), while Jet A Full Service increased from $6.24 in December 2025 to $8.07 in May 2026, an increase of $1.83 (29.3%).
Following gradual increases from December through February, both fuel types moved sharply higher beginning in March amid developments in the Middle East, iFlightPlanner officials noted.
National Jet A Full Service prices climbed from $6.41 in February to $7.64 in March, before reaching $8.07 in May, a nearly 26% increase in just three months.
Both Jet A and 100LL closed May at their highest prices of the six-month reporting period.
About This Report
This report summarizes U.S. aviation fuel price trends for May 2026, based on pricing data collected directly by iFlightPlanner from 3,350 FBOs and fuel service providers across the United States. All prices reflect reported retail prices at the time of confirmation. The average age of all reported prices is 9.4 days.
This data is distributed to aviation organizations and platforms, including the Aircraft Owners and Pilots Association (AOPA), AeroQuote, Hamilton AI, SkyVector, PilotGPT, SurfOS, CharterHub, and more.
For more information: iFlightPlanner.com/api/BusinessData
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