United Airlines Hub Airports — Live Status & Delays

United Airlines operates a network of 8 hub airports spanning the United States and the Pacific, plus the Tokyo-Narita gateway — all 9 of which The Blue Board tracks. Together, these airports handle thousands of daily departures connecting over 350 destinations worldwide. The Blue Board tracks every United flight at every one of these airports in real time — updated every 30 seconds.

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

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, operating under FAA flight caps (72 operations per hour) extended through October 2027; 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 Asia-Pacific connecting hub (United splits its mainland-US Tokyo service between Narita and Tokyo Haneda), and Guam (GUM) connects Pacific island routes. Washington Dulles (IAD) serves both domestic and transatlantic routes.

• 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

What are United Airlines' hub airports?

United Airlines operates 8 official hub airports: Chicago O'Hare (ORD), Denver (DEN), Houston Intercontinental (IAH), Newark Liberty (EWR), San Francisco (SFO), Washington Dulles (IAD), Los Angeles (LAX), and Guam (GUM) — plus the Tokyo-Narita (NRT) gateway that The Blue Board also tracks. ORD is the largest with about 640 daily departures on its late-September 2026 schedule.

Which United Airlines hub has the most flights?

Chicago O'Hare (ORD) is United's largest hub with about 640 daily departures on its late-September 2026 schedule (more at the summer peak). Denver (DEN) is the second-largest with about 570. Houston (IAH) handles around 480, while Newark (EWR) handles roughly 350-400 under FAA flight caps (extended through October 2027).

How can I check delays at United Airlines hubs?

The Blue Board monitors delays, cancellations, and ground stops at all 8 United hubs plus the Tokyo-Narita gateway 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?

United's 8 hubs and the Tokyo-Narita gateway all have some level of international service. The primary international gateways are: Newark (EWR) for transatlantic flights, San Francisco (SFO) for transpacific routes, and Houston (IAH) for Latin America. Tokyo Narita (NRT) is United's Asia-Pacific gateway, though most mainland-US Tokyo service now uses Tokyo Haneda (HND).