Saia Tonnage Growth Accelerates on Market Recovery Signals

4% driven by rising shipment volumes and heavier freight. While the absolute tonnage growth slowed from March's 15% two-year stacked comparison to 8%, the sequential improvement relative to April signals strengthening freight demand. Concurrent with this carrier-level data, manufacturing activity expanded for a fifth consecutive month, with the Purchasing Managers' Index reaching its highest level in four years, suggesting sustained near-term demand for freight services. This development carries significant implications for the broader LTL sector and supply chain professionals.

Higher weight-per-shipment metrics—averaging 8% on two-year comparison for both April and May—indicate not just volume recovery but also richer freight mix, which typically translates to improved revenue per shipment and operating margins. Saia's guidance for 400-450 basis points of sequential margin improvement in Q2 reflects confidence in sustained demand, though the company's extensive terminal expansion program continues to weigh on short-term profitability. The convergence of carrier performance data with manufacturing PMI improvements suggests capacity constraints may begin to ease if demand continues its upward trajectory. For supply chain professionals, this article underscores the importance of monitoring both carrier-reported metrics and macroeconomic indicators.

The leading PMI new orders subindex, which jumped 270 basis points sequentially, historically precedes LTL volume changes by several months, suggesting demand strength may persist through mid-2026. Organizations should reassess freight budgets and capacity planning assumptions if this trend holds, as tightening LTL capacity and rate pressure could reverse course.