Denver International (DEN) on-time performance, September 2026
29,426 scheduled airline departures from Denver in September 2026, 74.5% of them on time. Measured from FAA departure data, updated every morning.
On time, day by day
Share of departures within 15 minutes of schedule, by day. Light bars show each day's departures for context. Worst day: Saturday 19 September at 56.5%. Best: Sunday 6 September at 85.2%.
Airlines at DEN, ranked by on-time share
Scheduled airlines with at least 30 departures from DEN in the month. Regional partners (SkyWest, Republic, Envoy and the like) appear under their own names; fractional and charter operators are in the totals but not listed.
| Airline | Departures | On time | 45+ min late | Avg delay (min) |
|---|---|---|---|---|
| Federal Express FDX | 89 | 100.0% | 0.0% | -20.6 |
| Volaris VOI | 79 | 93.7% | 1.3% | -4.7 |
| United Parcel Service UPS | 135 | 92.6% | 3.0% | -4.9 |
| Icelandair ICE | 40 | 85.0% | 7.5% | 3.0 |
| Aeromexico AMX | 30 | 83.3% | 3.3% | 8.4 |
| Delta Air Lines DAL | 965 | 82.3% | 8.6% | 6.6 |
| Frontier Airlines FFT | 1,850 | 81.8% | 9.8% | 5.9 |
| Transportes Aereos I.R. Crusoe ROU | 40 | 80.0% | 12.5% | 18.9 |
| Alaska Airlines ASA | 293 | 79.5% | 7.2% | 4.9 |
| Key Lime Air LYM | 572 | 79.4% | 8.0% | 1.0 |
| CSB CSB | 42 | 78.6% | 4.8% | 7.6 |
| United Airlines UAL | 9,984 | 77.1% | 10.5% | 12.5 |
| SkyWest SKW | 6,597 | 76.7% | 10.1% | 11.3 |
| American Airlines AAL | 754 | 75.7% | 13.0% | 18.3 |
| Air Canada ACA | 136 | 75.7% | 7.4% | 9.3 |
| Corporate Flight Management VTE | 114 | 70.2% | 17.5% | 19.8 |
| Allegiant Air AAY | 52 | 67.3% | 17.3% | 18.1 |
| Bemidji Airlines BMJ | 73 | 67.1% | 6.8% | 10.3 |
| Southwest Airlines SWA | 7,049 | 65.4% | 12.7% | 16.4 |
| Sun Country Airlines SCX | 33 | 60.6% | 12.1% | 5.0 |
| Air Transport International ATN | 121 | 59.5% | 9.9% | 20.1 |
| Lufthansa DLH | 58 | 56.9% | 15.5% | 23.0 |
| JetBlue JBU | 85 | 50.6% | 29.4% | 33.8 |
| Alpine Air Express AIP | 79 | 35.4% | 16.5% | 22.6 |
Destinations with the longest delays
Routes from DEN with at least 20 departures, by average departure delay.
| To | Flights | On time | Avg delay |
|---|---|---|---|
| BOS Boston | 293 | 37.2% | 51.0 |
| LIH Lihue | 28 | 82.1% | 41.2 |
| YQR Regina | 33 | 48.5% | 38.0 |
| DAY Dayton | 30 | 63.3% | 36.3 |
| KECP Panama City Beach | 20 | 70.0% | 31.1 |
| HOB Hobbs | 29 | 62.1% | 30.1 |
| CNM Carlsbad | 21 | 76.2% | 29.0 |
| YWG Winnipeg | 33 | 72.7% | 28.5 |
| MIA Miami | 142 | 73.2% | 27.5 |
| PVD Providence | 20 | 65.0% | 26.8 |
Busiest destinations
The ten routes with the most departures from DEN this month.
| To | Flights | On time | Avg delay |
|---|---|---|---|
| PHX Phoenix | 690 | 74.5% | 11.4 |
| SLC Salt Lake City | 659 | 75.6% | 11.6 |
| LAX Los Angeles | 633 | 79.1% | 8.1 |
| ORD Chicago | 630 | 71.6% | 20.2 |
| SEA Seattle | 604 | 75.7% | 10.0 |
| LAS Las Vegas | 548 | 75.0% | 15.2 |
| SAN San Diego | 533 | 62.7% | 16.6 |
| DFW Dallas-Fort Worth | 515 | 75.3% | 14.9 |
| MSP Minneapolis | 509 | 76.6% | 10.1 |
| SFO San Francisco | 465 | 61.3% | 23.1 |
Other months for DEN
Airline pages for September 2026
How we measure
On time means the aircraft took off within 15 minutes of its scheduled departure, after subtracting the departure airport's normal taxi time at DEN (FAA SWIM reports wheels-off, not push-back, so the median taxi time of the last 30 days is taken off every flight first). Average delay is the mean of that taxi-adjusted delay over all departures; early departures count as negative minutes, so an operator that routinely leaves early can show a negative average. 45+ min late is the share of departures that left 45 minutes or more behind schedule, the point at which most connections are at risk.
Scope: scheduled airlines only, the same set as the monthly State of the Sky report (operators with published routes; private, fractional and charter operators are left out), so the two publications give the same numbers for the same month. Departures are counted by scheduled day (UTC). Each day's flights are rolled up overnight and published the next morning; the newest day keeps filling in for a day or two and is only shown once it is substantially complete. Figures can differ by a few tenths of a point from the State of the Sky report for the same month: that report is frozen on the 2nd of the following month, while these pages are rebuilt from the live rollup, which recomputes each airport's taxi baseline nightly and re-rolls the last week of the month as late departure times arrive (September 2026 at SFO: 16,398 departures in both, 69.2% on time here against 69.5% in the report).
Source: FAA System Wide Information Management (SWIM) flight plans and departure times, processed by PlaneTrack. Free to quote with credit to PlaneTrack (CC BY 4.0).