Fontana gas & diesel update: AAA San Bernardino prices ease today, June 23

Fontana CA Gas & Diesel Watch — The latest AAA San Bernardino metro averages show regular gas is lower and diesel is also lower compared with both yesterday and last week. For Tuesday, June 23, AAA lists regular gas at $5.412 (down from $5.429 yesterday and $5.577 a week ago). Diesel is $6.642 (down from $6.664 yesterday and $6.848 a week ago).

AAA San Bernardino metro: regular gas vs. diesel

Regular gas: $5.412 today, $5.429 yesterday, $5.577 week ago.

Diesel: $6.642 today, $6.664 yesterday, $6.848 week ago.

Fontana station snapshot (7-Eleven)

Even with the metro-average easing, the regular-to-diesel gap is still very noticeable in Fontana when you look at displayed pump prices.

7-Eleven, 16060 Jurupa Ave (Fontana): Regular $5.099; Diesel $6.499.

7-Eleven, 17064 Sierra Lakes Pkwy (Fontana): Regular $4.949; Diesel $6.459.

At these two locations, diesel runs about $1.40 to $1.51 more per gallon than regular—so “gas prices are down” can still translate to meaningfully higher costs for drivers who need diesel.

National context: EIA shows both fuels eased vs. last week

On the national side, the U.S. Energy Information Administration (EIA) reports the latest U.S. regular gasoline price at $3.914 for 06/22/26, down vs. a week ago (week-ago change: -0.138). EIA’s on-highway diesel is $4.832 for 06/22/26, also down vs. week ago (week-ago change: -0.227).

EIA is broad national context, not a substitute for Fontana pump checks—but it does match what AAA is showing for the San Bernardino metro: easing movement from yesterday and from a week ago.

What this means locally in Fontana

Commuters and parents who mostly buy regular gas may feel some relief if they’re tracking the AAA metro trend. But diesel drivers—including delivery routes, service fleets, landscapers, trades crews, and any driver hauling equipment—can still see higher weekly fuel spend because diesel remains far above regular at the pump.

And station-to-station differences are real: these two nearby 7-Eleven listings show regular prices that aren’t identical, and diesel prices that stay clustered far above regular in both cases—so if you use diesel for work, it pays to check and compare.

Share your local numbers: What are the highest and lowest regular and diesel prices you’re seeing in Fontana today?

Sources

• AAA Fuel Prices (California state page with San Bernardino metro averages)
• 7-Eleven, 16060 Jurupa Ave, Fontana (displayed regular + diesel)
• U.S. EIA gasoline and diesel fuel update