United Airlines Hub Airports — Live Status & Delays

United Airlines operates a network of 9 hub airports spanning the United States, Asia, and the Pacific. Together, these hubs handle thousands of daily departures connecting over 350 destinations worldwide. The Blue Board tracks every United flight at every hub in real time — updated every 30 seconds.

Select a hub below to see live delay counts, on-time performance, Starlink WiFi fleet information, seasonal delay patterns, terminal details, and more.

United Airlines Hub Network

United's hub-and-spoke network is built around three tiers of hubs:

• Major domestic hubs: Chicago O'Hare (ORD) and Denver (DEN) are the two largest, handling over 1,200 daily departures combined. ORD is United's global headquarters and largest operation.
• Gateway hubs: Newark (EWR) serves as the East Coast transatlantic gateway, San Francisco (SFO) and Los Angeles (LAX) are Pacific gateways, and Houston (IAH) is the primary Latin America gateway.
• International hubs: Tokyo Narita (NRT) is United's Asian hub, and Guam (GUM) connects Pacific island routes. Washington Dulles (IAD) serves both domestic and transatlantic routes.

What The Blue Board Tracks at Each Hub

• Live flight counts — active United flights at each hub, updated every 30 seconds
• Delay monitoring — real-time delay counts, cancellations, and on-time percentage
• Ground stops & FAA alerts — NAS status affecting hub operations
• Departure & arrival schedules — with on-time stats and equipment swap detection
• Starlink WiFi fleet — which aircraft at each hub have Starlink satellite internet
• Weather conditions — METAR observations and NEXRAD radar overlay
• Seasonal delay patterns — historical context for weather-driven disruptions

Frequently Asked Questions

What are United Airlines' hub airports?

United Airlines operates 9 hub airports: Chicago O'Hare (ORD), Denver (DEN), Houston Intercontinental (IAH), Newark Liberty (EWR), San Francisco (SFO), Washington Dulles (IAD), Los Angeles (LAX), Tokyo Narita (NRT), and Guam (GUM). ORD is the largest with approximately 750 daily departures.

Which United Airlines hub has the most flights?

Chicago O'Hare (ORD) is United's largest hub with approximately 750 daily departures. Denver (DEN) is the second-largest with about 540. Houston (IAH) and Newark (EWR) each handle around 400 daily departures.

How can I check delays at United Airlines hubs?

The Blue Board monitors delays, cancellations, and ground stops at all 9 United hubs in real time. Visit theblueboard.co to see the hub health bar with on-time performance, or visit individual hub pages for detailed delay patterns, seasonal trends, and live flight counts.

Which United hubs have international flights?

All 9 United hubs have some level of international service. The primary international gateways are: Newark (EWR) for transatlantic flights, San Francisco (SFO) for transpacific routes, Houston (IAH) for Latin America, and Tokyo Narita (NRT) for Asia connections.