USPS Flying 50% of Mail to Meet UPS Contract Minimums

S. 5 billion annual (>$10 billion total value) air cargo deal with United Parcel Service. According to an Office of Inspector General audit, USPS management failed to forecast declining package volumes when negotiating minimum volume commitments with UPS, forcing the agency to shift mail products—including First-Class mail and Marketing Mail—to air transport to avoid penalty fees. Between October 2024 and March 2025, the percentage of First-Class mail traveling by air jumped from 2% to 50%, directly contradicting USPS's broader "Delivering for America" transformation strategy that aims to shift cargo to cheaper surface transportation.

This misalignment has cost the Postal Service an estimated $127 million in unnecessary air capacity payments and contributed to an additional $200 million in transportation network costs in fiscal year 2025. The core issue is that USPS committed to volume guarantees without accounting for the 54% decline in Priority Mail volumes that had already occurred prior to the contract announcement. The Inspector General has recommended early termination of the UPS contract and renegotiation with terms that better align with current operational realities and ground-network investment priorities. For supply chain professionals, this case illustrates the critical importance of accurate demand forecasting when negotiating long-term carrier contracts with minimum volume thresholds.

The USPS situation demonstrates how rigid contractual minimums can lock organizations into economically suboptimal transportation modes, even when strategic priorities and market conditions shift. Organizations managing complex multi-modal networks should evaluate contract flexibility, option years, and volume-adjustment mechanisms to avoid being forced into higher-cost alternatives when demand patterns evolve.