July 17, 2026

Las Vegas is in a 95-minute ground delay program on a staffing constraint tonight, while the day's thunderstorm ground stops have cleared

The FAA put Las Vegas into a ground delay program at 9:49 PM ET (arrivals 10 PM through 3:59 AM ET, averaging 95 minutes, max 186) over an L30 TRACON staffing constraint with thunderstorms nearby. Atlanta's ground stop expired at midnight, DFW went into a third ground stop of the day at 9:03 PM ET before clearing at 10:17 PM, and the Philadelphia smoke, DCA wind, San Diego, Seattle, and San Francisco ground delay programs all cancelled overnight. SpaceX's scrubbed Starship launch moves to July 17.

Las Vegas is the only major U.S. airport still in an active traffic-management program right now. The FAA's Command Center implemented Harry Reid International's ground delay program at 9:49 PM ET (ADVZY 009), metering arrivals from 10 PM ET through 3:59 AM ET at an average of 95 minutes and a maximum of 186. The listed cause is staffing at the Las Vegas Terminal Radar Approach Control, known as L30, with thunderstorms in the vicinity and a low pop-up. Under a ground delay program, flights headed to Las Vegas are held at their departure airports and given new release times rather than circling overhead, so the delay shows up at your origin gate, not in the Vegas sky.

The L30 facility has been chronically short of controllers. FAA documents cited by the Review-Journal show the Las Vegas TRACON had 37 of a 46-controller target as of last October, with more attrition forecast (June 24). KTNV reported a separate count of 71 working controllers against 89 needed, about 22 percent below target (KTNV, June 23). When a sector closes for lack of staff, controllers slow arrivals to keep the remaining sectors manageable. In mid-June the same constraint produced delays averaging nearly three hours at Harry Reid (KTNV, June 19).

No Las Vegas travel waiver had been issued as of the advisory. Southwest, Harry Reid's largest carrier, showed no active advisory on its alerts page. With Spirit Airlines shut down since May 2, Southwest and Frontier now carry most of the low-cost traffic into Las Vegas. If you're flying to or from LAS overnight, check your flight status directly with the airline; staffing-driven programs usually end when the controller gap is filled rather than on a fixed weather schedule, so the 3:59 AM ET end time is a ceiling, not a promise.

The thunderstorm event that ran all day is clearing

As covered this evening, the FAA had Atlanta in a ground stop to midnight, DFW back in a ground stop, and new ground stops at JFK and Boston. All of it has since come down:

• Atlanta's ground stop expired at midnight ET as scheduled.
• DFW went into a third ground stop of the day at 9:03 PM ET (ADVZY 007, 1,302 flights affected, 41-minute average, thunderstorms) and was cancelled at 10:17 PM ET (ADVZY 013).
• Boston's wind ground stop was cancelled at 8:14 PM ET (ADVZY 003).
• Philadelphia's wildfire-smoke ground delay program was cancelled at 12:25 AM ET (ADVZY 005).
• Reagan National's wind ground delay program was cancelled at 11:25 PM ET with "all delay taken" (ADVZY 015).
• San Diego's volume ground delay program was cancelled at 12:30 AM ET (ADVZY 017), Seattle's thunderstorm program at 12:53 AM ET (ADVZY 018), and San Francisco's at 1:10 AM ET with "objective met" (ADVZY 020).
• The New York Area hotline was deactivated at 10:10 PM ET (ADVZY 011).

The storm system that trained across Texas and the mid-continent delayed more than 3,600 U.S. flights and canceled dozens this week, with Dallas-Fort Worth the hardest-hit hub (NJ.com, July 16). Residual departure delays of 15 to 45 minutes were still showing at Seattle, Boston, the Dallas airports, Newark, JFK, and Chicago O'Hare, where low visibility was the factor, in the last tracker snapshot around 11:20 PM ET (FlightCheck). Those should keep easing as the backlogs clear.

What's next today

The FAA's overnight operations plan (ADVZY 008) flags another convective afternoon for July 17, with ground stops or delay programs possible at Orlando and Tampa after 8 AM ET, Reagan National and San Diego after 10 AM ET, San Francisco after 11 AM ET, and Atlanta, Chicago O'Hare and Midway, Las Vegas, and Miami and Fort Lauderdale after 2 PM ET. The L30 staffing constraint is scheduled to run to 3 AM ET. SpaceX's Starship Flight 13, scrubbed Thursday, is rescheduled to launch from Boca Chica, Texas tonight at 6:45 PM ET, with debris-response airspace closures possible along the launch corridor (ADVZY 006).