Airport reliability
Chicago (ORD) on-time performance
How reliably flights leave Chicago, IL (ORD) and reach their destinations, by airline, departure hour and month, September 2025 to August 2026.
Chicago, IL363,008 departures in 12 months
- Departures on time
- 68.6% U.S. average 75.6%
- Cancelled
- 2.8% U.S. average 1.9%
- 60+ minutes late
- 11.7% U.S. average 8.1%
- Scheduled departures
- 363,008 12 months
What this means
ORD departures ran below the U.S. average.
- 68.6% of the 363,008 scheduled departures from Chicago (ORD) arrived at their destination on time, 7.0 points lower than the U.S. average of 75.6%.
- 2.8% of departures were cancelled (U.S. average 1.9%), and 11.7% arrived an hour or more late.
- Flights arriving at ORD were on time 70.7% of the time.
- Among airlines with at least 300 departures, Envoy Air was the most punctual from ORD (73.7%) and PSA Airlines the least (55.9%).
- Over the last 3 years, October was the most reliable month for departures from ORD (80.5% on time) and July the least reliable (65.1%).
- Cancellations peaked in January, when 4.1% of flights were cancelled.
- Flights scheduled to depart 6 am to 7 am were the most punctual (84.2% on time); flights scheduled to depart 5 pm to 6 pm were the least (58.1%).
Airlines at ORD
Ranked by on-time arrival
| Airline | On time | Cancelled | 60+ min late | Avg delay when late | Departures |
|---|---|---|---|---|---|
| Envoy AirSold as American Eagle | 73.7% | 2.9% | 8.6% | 65 min | 57,966 |
| Republic AirwaysSold as American Eagle, Delta Connection, United Express | 73.0% | 3.8% | 9.1% | 74 min | 33,415 |
| United Airlines | 71.8% | 1.3% | 10.3% | 73 min | 102,132 |
| Southwest Airlines | 70.0% | 1.4% | 9.6% | 70 min | 3,139 |
| Delta Air Lines | 69.4% | 3.1% | 11.7% | 91 min | 10,687 |
| JetBlue Airways | 68.3% | 6.3% | 12.1% | 99 min | 1,293 |
| Alaska Airlines | 66.1% | 1.8% | 10.9% | 69 min | 3,346 |
| Frontier Airlines | 65.1% | 3.8% | 14.8% | 109 min | 4,179 |
| American Airlines | 64.5% | 2.6% | 14.0% | 82 min | 61,506 |
| SkyWest AirlinesSold as United Express, Delta Connection, American Eagle, Alaska | 62.8% | 4.1% | 14.5% | 88 min | 78,955 |
| Spirit Airlines | 59.4% | 6.0% | 15.7% | 83 min | 3,558 |
| PSA AirlinesSold as American Eagle | 55.9% | 7.1% | 20.1% | 127 min | 2,832 |
Tap a heading to sort.
On-time rate by departure hour
Share of scheduled flights on time ORD average 68.6%
Show as table
| Period | On time | Flights |
|---|---|---|
| Departing before 6 am | 84.0% | 3,419 |
| Departing 6 am to 7 am | 84.2% | 13,442 |
| Departing 7 am to 8 am | 82.1% | 23,377 |
| Departing 8 am to 9 am | 78.4% | 30,588 |
| Departing 9 am to 10 am | 75.2% | 24,794 |
| Departing 10 am to 11 am | 73.0% | 25,958 |
| Departing 11 am to noon | 71.9% | 19,358 |
| Departing noon to 1 pm | 71.4% | 18,635 |
| Departing 1 pm to 2 pm | 70.9% | 22,878 |
| Departing 2 pm to 3 pm | 67.8% | 23,534 |
| Departing 3 pm to 4 pm | 64.5% | 20,143 |
| Departing 4 pm to 5 pm | 61.7% | 22,245 |
| Departing 5 pm to 6 pm | 58.1% | 19,683 |
| Departing 6 pm to 7 pm | 58.5% | 23,622 |
| Departing 7 pm to 8 pm | 59.6% | 23,469 |
| Departing 8 pm to 9 pm | 59.8% | 20,373 |
| Departing 9 pm to 10 pm | 59.9% | 17,837 |
| Departing 10 pm to 11 pm | 58.6% | 8,362 |
| Departing 11 pm to midnight | 60.3% | 1,291 |
Best and worst months at ORD
Share of scheduled flights on time 12-month average 68.6%
Show as table
| Period | On time | Flights |
|---|---|---|
| January | 68.1% | 67,095 |
| February | 77.4% | 65,080 |
| March | 71.3% | 78,241 |
| April | 74.5% | 82,988 |
| May | 73.0% | 86,568 |
| June | 68.3% | 85,222 |
| July | 65.1% | 88,044 |
| August | 67.4% | 88,777 |
| September | 79.5% | 76,098 |
| October | 80.5% | 79,119 |
| November | 78.0% | 71,492 |
| December | 71.9% | 71,122 |
Month by month, last 12 months
Share of scheduled flights on time U.S. average 75.6%
Show as table
| Period | On time | Flights |
|---|---|---|
| Sep 2025 | 78.7% | 28,867 |
| Oct 2025 | 74.3% | 31,096 |
| Nov 2025 | 69.1% | 28,703 |
| Dec 2025 | 59.3% | 27,790 |
| Jan 2026 | 64.7% | 25,131 |
| Feb 2026 | 72.7% | 25,538 |
| Mar 2026 | 61.9% | 31,373 |
| Apr 2026 | 67.1% | 33,206 |
| May 2026 | 75.1% | 33,733 |
| Jun 2026 | 68.7% | 31,374 |
| Jul 2026 | 68.2% | 33,010 |
| Aug 2026 | 62.9% | 33,187 |
Busiest routes from ORD
| To | On time | Cancelled | Airlines | Flights |
|---|---|---|---|---|
| New York (LGA) | 62.6% | 5.3% | 6 | 11,630 |
| Boston (BOS) | 64.5% | 3.0% | 6 | 7,864 |
| Los Angeles (LAX) | 70.9% | 1.3% | 5 | 7,121 |
| Dallas/Fort Worth (DFW) | 68.0% | 2.7% | 7 | 7,111 |
| Washington (DCA) | 66.6% | 3.0% | 5 | 7,104 |
| Atlanta (ATL) | 72.2% | 2.3% | 9 | 6,495 |
| Minneapolis (MSP) | 67.9% | 2.7% | 8 | 6,395 |
| Orlando (MCO) | 71.2% | 1.6% | 5 | 6,220 |
| Houston (IAH) | 74.8% | 1.4% | 7 | 6,141 |
| Newark (EWR) | 66.9% | 3.8% | 5 | 6,126 |
| Denver (DEN) | 73.3% | 1.2% | 5 | 6,118 |
| Detroit (DTW) | 68.8% | 3.2% | 7 | 6,013 |
| San Francisco (SFO) | 65.5% | 1.1% | 2 | 5,649 |
| Phoenix (PHX) | 70.8% | 1.6% | 4 | 5,631 |
| Seattle (SEA) | 66.4% | 1.4% | 4 | 5,542 |
| Milwaukee (MKE) | 61.3% | 4.7% | 4 | 5,344 |
| Indianapolis (IND) | 71.1% | 3.9% | 5 | 5,279 |
| Las Vegas (LAS) | 71.7% | 1.3% | 5 | 5,154 |
| Philadelphia (PHL) | 68.4% | 3.4% | 4 | 5,082 |
| Nashville (BNA) | 67.4% | 2.5% | 9 | 5,044 |
Sources & data dates
- Source
- U.S. DOT Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987-present)
- Period
- September 2025 to August 2026 (12 months); month-of-year patterns September 2023 to August 2026
- Data through
- August 2026
- Processed
- 2026-11-03
- Scope
- Scheduled nonstop domestic departures from Chicago, IL (ORD) by airlines that report to the DOT.
- Method
- Rates use all scheduled flights as the denominator; cancelled and diverted flights count as not on time. Figures based on fewer than 50 scheduled flights are suppressed. Full methodology.