30 major US airports with the most departure delays, ranked
- Flights are considered on time if they depart from the gate within 15 minutes of the scheduled time.
- Salt Lake City International Airport had the highest on-time departure performance.
- Meanwhile, Fort Lauderdale-Hollywood International Airport had the lowest.
- Salt Lake City International Airport
25. George Bush Intercontinental Airport
On-time departure rate, January-June 2026: 79.01%
Scheduled flights, June 2025-May 2026: 173,551
Top carriers, June 2025-May 2026: United (56.94%), Mesa (9.87%), Spirit (5.62%)
24. Los Angeles International Airport
On-time departure rate, January-June 2026: 78.76%
Scheduled flights, June 2025-May 2026: 201,013
Top carriers, June 2025-May 2026: Delta (22.38%), United (18.69%), American (17.69%)
- Hartsfield-Jackson Atlanta International Airport
On-time departure rate, January-June 2026: 77.44%
Scheduled flights, June 2025-May 2026: 348,958
Top carriers, June 2025-May 2026: Delta (74.72%), Frontier (7.00%), Southwest (4.53%)
- Philadelphia International Airport
On-time departure rate, January-June 2026: 77.08%
Scheduled flights, June 2025-May 2026: 130,566
Top carriers, June 2025-May 2026: American (47.43%), Frontier (11.83%), Delta (6.43%)
- John F. Kennedy International Airport
On-time departure rate, January-June 2026: 76.38%
Scheduled flights, June 2025-May 2026: 124,603
Top carriers, June 2025-May 2026: Delta (33.27%), JetBlue (30.54%), American (12.85%)
- Phoenix Sky Harbor International Airport
On-time departure rate, January-June 2026: 76.18%
Scheduled flights, June 2025-May 2026: 208,792
Top carriers, June 2025-May 2026: Southwest (34.51%), American (32.75%), Delta (6.95%)
- Denver International Airport
On-time departure rate, January-June 2026: 76.14%
Scheduled flights, June 2025-May 2026: 326,928
Top carriers, June 2025-May 2026: United (40.69%), Southwest (30.40%), Frontier (9.85%)
- Boston Logan International Airport
On-time departure rate, January-June 2026: 76.07%
Scheduled flights, June 2025-May 2026: 161,772
Top carriers, June 2025-May 2026: JetBlue (27.10%), Delta (22.14%), American (13.93%)
- Tampa International Airport
On-time departure rate, January-June 2026: 75.85%
Scheduled flights, June 2025-May 2026: 84,484
Top carriers, June 2025-May 2026: Southwest (25.57%), Delta (19.29%), American (16.71%)
- Detroit Metropolitan Wayne County Airport
On-time departure rate, January-June 2026: 75.80%
Scheduled flights, June 2025-May 2026: 144,924
Top carriers, June 2025-May 2026: Delta (54.32%), SkyWest (10.44%), Spirit (9.56%)
- Charlotte Douglas International Airport
On-time departure rate, January-June 2026: 75.57%
Scheduled flights, June 2025-May 2026: 237,042
Top carriers, June 2025-May 2026: American (67.78%), Delta (2.15%), Frontier (1.93%)
- San Diego International Airport
On-time departure rate, January-June 2026: 74.04%
Scheduled flights, June 2025-May 2026: 104,990
Top carriers, June 2025-May 2026: Southwest (35.48%), Alaska (13.50%), United (12.24%)
- Austin-Bergstrom International Airport
On-time departure rate, January-June 2026: 73.52%
Scheduled flights, June 2025-May 2026: 91,854
Top carriers, June 2025-May 2026: Southwest (42.29%), Delta (15.73%), American (14.66%)
- San Francisco International Airport
On-time departure rate, January-June 2026: 73.42%
Scheduled flights, June 2025-May 2026: 149,754
Top carriers, June 2025-May 2026: United (47.38%), Delta (10.62%), SkyWest (9.85%)
- Harry Reid International Airport
On-time departure rate, January-June 2026: 73.21%
Scheduled flights, June 2025-May 2026: 181,954
Top carriers, June 2025-May 2026: Southwest (44.34%), Delta (10.06%), United (8.98%)
- Miami International Airport
On-time departure rate, January-June 2026: 72.96%
Scheduled flights, June 2025-May 2026: 115,040
Top carriers, June 2025-May 2026: American (61.27%), Delta (11.87%), United (6.61%)
- LaGuardia Airport
On-time departure rate, January-June 2026: 72.09%
Scheduled flights, June 2025-May 2026: 159,367
Top carriers, June 2025-May 2026: Delta (25.19%), American (14.82%), Endeavor (10.27%)
- Orlando International Airport
On-time departure rate, January-June 2026: 71.79%
Scheduled flights, June 2025-May 2026: 169,849
Top carriers, June 2025-May 2026: Southwest (26.49%), Delta (14.40%), Frontier (12.26%)
- Chicago O’Hare International Airport
On-time departure rate, January-June 2026: 71.03%
Scheduled flights, June 2025-May 2026: 384,095
Top carriers, June 2025-May 2026: United (38.55%), American (22.70%), SkyWest (9.88%)
- Baltimore/Washington International Thurgood Marshall Airport
On-time departure rate, January-June 2026: 70.74%
Scheduled flights, June 2025-May 2026: 96,660
Top carriers, June 2025-May 2026: Southwest (73.15%), Delta (6.02%), Spirit (4.86%)
- Nashville International Airport
On-time departure rate, January-June 2026: 69.97%
Scheduled flights, June 2025-May 2026: 112,706
Top carriers in June 2025*: Southwest (50.1%), American (14.8%), Delta (13.3%).
*BTS does not have information on Nashville International’s top carriers. Instead, this data has been collated from the airport’s annual report, which shows average daily scheduled arrivals and departures for June 2025.
- Ronald Reagan Washington National Airport
On-time departure rate, January-June 2026: 69.87%
Scheduled flights, June 2025-May 2026: 141,917
Top carriers, June 2025-May 2026: American (27.59%), Southwest (14.03%), Delta (9.59%)
- Chicago Midway International Airport
On-time departure rate, January-June 2026: 69.30%
Scheduled flights, June 2025-May 2026: 74,133
Top carriers, June 2025-May 2026: Southwest (93.52%), Frontier (3.11%), Delta (1.58%)
- Dallas Fort Worth International Airport
On-time departure rate, January-June 2026: 68.22%
Scheduled flights, June 2025-May 2026: 315,953
Top carriers, June 2025-May 2026: American (66.69%), Envoy Air (10.79%), Frontier (4.64%)
- Fort Lauderdale-Hollywood International Airport
On-time departure rate, January-June 2026: 66.39%
Scheduled flights, June 2025-May 2026: 91,994
Top carriers, June 2025-May 2026: Spirit (23.13%), JetBlue (21.61%), Delta (15.53%)
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