Airport reliability
Denver (DEN) on-time performance
How reliably flights leave Denver, CO (DEN) and reach their destinations, by airline, departure hour and month, September 2025 to August 2026.
Denver, CO319,681 departures in 12 months
- Departures on time
- 75.8% U.S. average 75.6%
- Cancelled
- 0.8% U.S. average 1.9%
- 60+ minutes late
- 7.8% U.S. average 8.1%
- Scheduled departures
- 319,681 12 months
What this means
DEN departures beat the U.S. average.
- 75.8% of the 319,681 scheduled departures from Denver (DEN) arrived at their destination on time, about the same as the U.S. average of 75.6%.
- 0.8% of departures were cancelled (U.S. average 1.9%), and 7.8% arrived an hour or more late.
- Flights arriving at DEN were on time 78.1% of the time.
- Among airlines with at least 300 departures, Delta Air Lines was the most punctual from DEN (81.7%) and JetBlue Airways the least (62.1%).
- Over the last 3 years, October was the most reliable month for departures from DEN (81.6% on time) and June the least reliable (66.4%).
- Cancellations peaked in January, when 2.4% of flights were cancelled.
- Flights scheduled to depart before 6 am were the most punctual (92.7% on time); flights scheduled to depart 6 pm to 7 pm were the least (61.3%).
Airlines at DEN
Ranked by on-time arrival
| Airline | On time | Cancelled | 60+ min late | Avg delay when late | Departures |
|---|---|---|---|---|---|
| Delta Air Lines | 81.7% | 1.4% | 5.9% | 75 min | 11,497 |
| SkyWest AirlinesSold as United Express, Delta Connection, American Eagle, Alaska | 79.2% | 1.1% | 7.3% | 78 min | 75,223 |
| United Airlines | 78.3% | 0.4% | 7.2% | 65 min | 107,895 |
| Frontier Airlines | 77.8% | 0.8% | 7.6% | 68 min | 22,870 |
| Alaska Airlines | 77.5% | 0.7% | 5.9% | 57 min | 2,879 |
| Allegiant Air | 76.1% | 0.5% | 12.3% | 94 min | 373 |
| American Airlines | 75.4% | 2.0% | 9.6% | 105 min | 8,936 |
| Envoy AirSold as American Eagle | 74.5% | 0.6% | 7.1% | 84 min | 326 |
| Southwest Airlines | 68.8% | 0.7% | 8.8% | 54 min | 88,424 |
| JetBlue Airways | 62.1% | 4.6% | 15.0% | 93 min | 1,258 |
Tap a heading to sort.
On-time rate by departure hour
Share of scheduled flights on time DEN average 75.8%
Show as table
| Period | On time | Flights |
|---|---|---|
| Departing before 6 am | 92.7% | 4,492 |
| Departing 6 am to 7 am | 91.3% | 8,785 |
| Departing 7 am to 8 am | 88.1% | 17,126 |
| Departing 8 am to 9 am | 88.4% | 18,048 |
| Departing 9 am to 10 am | 83.7% | 24,168 |
| Departing 10 am to 11 am | 81.6% | 20,420 |
| Departing 11 am to noon | 79.3% | 31,656 |
| Departing noon to 1 pm | 77.6% | 12,856 |
| Departing 1 pm to 2 pm | 79.8% | 28,601 |
| Departing 2 pm to 3 pm | 72.0% | 12,093 |
| Departing 3 pm to 4 pm | 72.3% | 17,524 |
| Departing 4 pm to 5 pm | 69.4% | 15,220 |
| Departing 5 pm to 6 pm | 68.5% | 30,369 |
| Departing 6 pm to 7 pm | 61.3% | 12,193 |
| Departing 7 pm to 8 pm | 64.7% | 27,990 |
| Departing 8 pm to 9 pm | 65.9% | 20,304 |
| Departing 9 pm to 10 pm | 68.6% | 9,903 |
| Departing 10 pm to 11 pm | 65.9% | 3,410 |
| Departing 11 pm to midnight | 79.2% | 4,523 |
Best and worst months at DEN
Share of scheduled flights on time 12-month average 75.8%
Show as table
| Period | On time | Flights |
|---|---|---|
| January | 75.2% | 72,577 |
| February | 76.6% | 67,621 |
| March | 77.4% | 78,720 |
| April | 78.0% | 75,282 |
| May | 72.6% | 80,668 |
| June | 66.4% | 84,394 |
| July | 67.0% | 87,337 |
| August | 69.2% | 83,975 |
| September | 80.5% | 77,432 |
| October | 81.6% | 80,235 |
| November | 81.6% | 74,438 |
| December | 79.6% | 76,985 |
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 | 79.2% | 26,548 |
| Oct 2025 | 80.5% | 27,763 |
| Nov 2025 | 83.4% | 25,280 |
| Dec 2025 | 73.5% | 26,026 |
| Jan 2026 | 80.7% | 24,484 |
| Feb 2026 | 81.5% | 23,046 |
| Mar 2026 | 75.5% | 27,089 |
| Apr 2026 | 82.0% | 25,345 |
| May 2026 | 76.0% | 27,406 |
| Jun 2026 | 66.6% | 28,634 |
| Jul 2026 | 68.6% | 29,503 |
| Aug 2026 | 66.0% | 28,557 |
Busiest routes from DEN
| To | On time | Cancelled | Airlines | Flights |
|---|---|---|---|---|
| Phoenix (PHX) | 74.9% | 0.8% | 6 | 9,069 |
| Salt Lake City (SLC) | 77.8% | 0.4% | 5 | 7,713 |
| Los Angeles (LAX) | 78.3% | 0.5% | 5 | 7,708 |
| Las Vegas (LAS) | 74.9% | 0.6% | 3 | 7,168 |
| Seattle (SEA) | 74.0% | 0.6% | 6 | 6,328 |
| San Diego (SAN) | 73.0% | 0.8% | 5 | 6,152 |
| Chicago (ORD) | 70.6% | 1.1% | 5 | 6,109 |
| Dallas/Fort Worth (DFW) | 74.2% | 1.8% | 5 | 6,063 |
| Minneapolis (MSP) | 77.8% | 0.7% | 5 | 5,828 |
| Atlanta (ATL) | 77.4% | 0.9% | 4 | 5,603 |
| San Francisco (SFO) | 62.9% | 0.4% | 3 | 5,488 |
| Austin (AUS) | 75.7% | 0.5% | 4 | 5,486 |
| Colorado Springs (COS) | 75.5% | 1.3% | 3 | 4,989 |
| Houston (IAH) | 79.3% | 0.3% | 2 | 4,728 |
| New York (LGA) | 68.1% | 2.9% | 4 | 4,664 |
| Orlando (MCO) | 76.8% | 0.7% | 3 | 4,528 |
| Kansas City (MCI) | 76.0% | 0.4% | 4 | 4,364 |
| Portland (PDX) | 74.5% | 0.3% | 5 | 4,280 |
| Sacramento (SMF) | 73.0% | 0.3% | 4 | 3,853 |
| Boston (BOS) | 68.3% | 1.5% | 4 | 3,851 |
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 Denver, CO (DEN) 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.