Air traffic control staffing shortages cause widespread flight delays

Over 200 flights were delayed, canceled, or diverted at Phoenix Sky Harbor on Thursday afternoon, a stark illustration of America's growing air traffic control crisis, according to 12News .

NB
Nathaniel Brooks

June 6, 2026 · 2 min read

Air traffic controllers working in a busy control tower during a period of widespread flight delays due to staffing shortages.

Over 200 flights were delayed, canceled, or diverted at Phoenix Sky Harbor on Thursday afternoon, a stark illustration of America's growing air traffic control crisis, according to 12News. This incident stranded thousands and disrupted the national network. Such disruptions are becoming common as staffing shortages delay flights throughout 2026.

The core tension is this: total flights using the air traffic system have increased significantly, but the number of certified professional controllers has decreased. This imbalance strains resources and operational capacity, pushing the system to its limits.

Based on current staffing trends and extensive training requirements, widespread flight delays and operational inefficiencies will likely persist and potentially worsen across the U.S. air travel network.

Travelers and Airlines Face Varied Impacts

  • Newark Liberty International Airport leads major Northeast airports in on-time performance (OTP) in 2026, according to Simple Flying.
  • United Airlines reported nearly 5.8 million passengers traveled through its Newark operation during April and May 2026, with the airport delivering its strongest on-time results on record for those months, according to Simple Flying.

While Newark's performance demonstrates localized resilience, such successes often come at the cost of broader system efficiency or through intense operational management. Isolated improvements like Newark's record on-time performance do not solve the national crisis; they merely shift the burden of systemic understaffing and rising flight volumes.

A Shrinking Workforce Meets Soaring Demand

The air traffic controller workforce was 6 percent smaller in fiscal year 2025 than in 2015, according to the GAO. Simultaneously, total flights increased by 10 percent between fiscal years 2015 and 2024, also reported by the GAO. This disparity creates an unsustainable pressure point in the national airspace. The system is fundamentally misaligned, guaranteeing more widespread delays like those at Phoenix Sky Harbor, impacting travelers nationwide.

The Quantifiable Shortfall

The FAA targets 12,563 Certified Professional Controllers (CPCs) for full staffing, according to the FAA. Yet, the agency employs only about 11,000 CPCs, roughly 3,000 below its stated need, according to Brookings. This significant gap directly limits the system's operational capacity, contributing to flight disruptions.

The Long Road to Recovery: Staffing and Training Challenges

At the end of fiscal year 2025, the FAA employed 13,164 controllers, according to the GAO. This figure includes both certified professionals and those in various stages of a multi-year training pipeline. This number exceeds the FAA's identified full staffing target of 12,563 CPCs, yet Brookings reports only 11,000 CPCs are employed, roughly 1,563 below needed levels. This stark contradiction in reported staffing figures suggests the FAA either lacks a consistent definition of 'staffed' or struggles to track its workforce accurately, hindering effective solutions.

The discrepancy implies a significant portion of the workforce remains in extensive training, not actively controlling air traffic. Despite ongoing recruitment, a considerable time investment is required before the certified workforce can meet operational demand. This means systemic capacity shortfalls will likely force airlines to absorb increased operational costs and face persistent reputational damage well into Q3 2026.