US retail diesel prices have surged to near-record levels, with the Energy Information Administration (EIA) reporting that the national average reached $6.352 per gallon in the week ending October 27, the third-highest reading on record. Prices rose for a second consecutive week, climbing 7.6 cents per gallon, as escalating geopolitical tensions in the Middle East continue to restrict global crude and diesel flows. The midcontinent region led the national increase, adding 12.8 cents per gallon week-over-week to reach $6.48 per gallon.
The diesel price surge is a direct consequence of the US-Iran conflict that began in early March 2026. Since the outbreak of hostilities, US diesel prices have risen by $2.634 per gallon compared with the same period last year. The national average briefly touched a record $6.529 per gallon on September 21 before easing slightly, but prices have resumed their upward trajectory in recent weeks. GasBuddy and AAA both placed the national diesel average at $6.34 per gallon as of October 26.
The impact on the logistics sector has been immediate and severe. The TD Cowen/AFS Freight Index, released in late October, projects that parcel shipping costs will reach record highs in the fourth quarter of 2026, driven by years of carrier pricing increases, elevated fuel surcharges, new delivery fees, and seasonal holiday demand. The ground parcel rate index is projected to reach 43.3% above its January 2018 baseline in Q4 2026, up 5.8% year over year, while the express parcel index is expected to hit a record high for the fifth consecutive quarter, rising 13.8% year over year.
A critical factor amplifying the cost impact is that carrier fuel surcharges have decoupled from actual diesel prices. According to the TD Cowen/AFS analysis, 72% of the 22.25-percentage-point increase in fuel surcharges since Q1 2021 is attributable to carrier adjustments to surcharge tables rather than fuel costs alone. Even if diesel prices returned to $2.91 per gallon, the surcharge would remain at 23.75%, approximately three times its 2021 level. Current fuel surcharge rates stand at 29.5% for UPS and 29% for FedEx, compared with just 7.75% in early 2021 when diesel was around $2.90 per gallon.
Less-than-truckload (LTL) freight costs are also projected to reach record highs in Q4 2026, with the LTL rate-per-pound index expected to reach 82.5% above its January 2018 baseline, marking the third consecutive quarterly record and an 8.8% year-over-year increase. Unlike parcel carriers, LTL fuel surcharges closely track actual diesel price movements, rising sharply as diesel reached its record level in September. Truckload rates are also climbing, with the rate-per-mile index rising from 7.6% above baseline in Q4 2025 to 19.7% in Q3 2026, driven primarily by shrinking carrier capacity rather than strong freight demand.
The cascading effects are reaching consumers and reshaping shipping behavior. Andy Dyer, CEO of AFS Logistics, noted that "we expect fuel to drive elevated transportation costs for the foreseeable future," adding that "inventories are low and refineries are at capacity, so even if crude oil prices drop in the coming months, diesel and jet fuel supplies must still catch up before prices recede". Retailers are responding by shifting freight from highways to railways, with Union Pacific reporting a 13% increase in domestic intermodal volume, CSX up 7%, and Norfolk Southern up 3%. Union Pacific CEO Jim Vena stated during an October 22 earnings call that "it costs us way less per ton to move products across the U.S., so when fuel prices go up, it's naturally an advantage".
Some retailers are also seeking cheaper delivery alternatives, turning to USPS and Amazon, whose fuel surcharge rates are approximately 8% and 3.5% respectively, far below the 29% charged by UPS and FedEx. However, shifting carriers mid-season carries its own costs, as splitting packages across multiple providers erodes bulk shipping discounts and holiday delivery plans are typically locked in months in advance. FedEx has also announced that effective January 4, 2027, 2,533 ZIP codes will be reclassified from extended to remote delivery areas, with the fee rising to $17.75 per package, roughly doubling residential charges and more than tripling commercial charges.
Looking ahead, the trajectory of US logistics costs remains closely tied to the geopolitical situation in the Middle East. International Energy Agency Executive Director Fatih Birol stated on October 26 that oil prices are unlikely to return to pre-conflict levels, warning that unless the Strait of Hormuz is genuinely and stably reopened, markets may continue to experience volatility. IEA member countries have released approximately 330 million barrels of emergency reserves, with about 100 million barrels remaining to be released, prioritizing more than 20 million barrels of diesel. For US shippers and consumers, the combination of elevated diesel prices, carrier pricing strategies, and seasonal demand suggests that record-high parcel and freight costs will persist well into 2027.