U.S. diesel prices moved higher again on March 9, 2026, with AAA’s daily national fuel tracker showing another sharp increase in the average retail price paid by drivers across the country.

Latest U.S. diesel average (daily)​

According to AAA, the U.S. average retail diesel price stood at $4.656 per gallon on March 9, 2026. That was up 6.1 cents from yesterday’s $4.595, up 88.6 cents from a week ago’s $3.770, and just over $1 higher than both the month-ago and year-ago averages, which were $3.634 and $3.635. AAA says its fuel price data is updated daily using OPIS information, making it the best same-day snapshot of diesel pump prices.

That kind of one-week move matters fast in trucking. When diesel jumps nearly 89 cents in seven days, fuel costs can start eating into margins for owner operators, small fleets, and trucking companies that booked freight before the run-up.

Weekly benchmark (official survey)​

The latest federal weekly benchmark remains lower than the AAA daily figure, which shows how quickly retail diesel has been moving. The U.S. Energy Information Administration reported the national on-highway diesel average at $3.897 per gallon for the week of March 2, 2026, up 8.8 cents from the prior week. EIA also lists its next diesel update for March 10, 2026, meaning that weekly survey lags the faster day-to-day moves now showing up in AAA’s daily tracker.

What’s driving the increase​

The broader energy market has been highly volatile. Oil prices jumped sharply as traders reacted to supply fears tied to the Iran conflict. When crude moves that aggressively, diesel usually follows because refining and wholesale fuel markets reprice quickly.

State price snapshot​

AAA’s state data also showed how wide diesel prices had spread across the country by March 9. California’s statewide diesel average reached $5.958 per gallon, while Texas stood at $4.397, Arkansas at $4.210, and Oklahoma at $4.051. That spread highlights how regional fuel costs can vary widely even during the same national price surge.

Key takeaway​

As of March 9, 2026, the most current national diesel number for truck drivers is AAA’s daily average of $4.656 per gallon. The weekly EIA figure remains useful as a federal benchmark, but the daily AAA number shows that diesel has continued climbing much faster than the weekly survey alone would suggest.