Best Time to Fly LGA to DEN: On-Time Stats by Hour & Airline
LaGuardia → Denver International
Data through July 2026 · Last updated October 18, 2026
4,667 flights were scheduled from New York (LGA) to Denver (DEN) in the last 12 months, and 71.4% of those that flew arrived on time, 6.2 points below the US average of 77.6%.
United Airlines was the most punctual of the 4 airlines on the route at 78.6%, while Southwest Airlines trailed at 61.5%.
September has been the best month (83% on time) and Sunday the weakest day of the week (71%).
3.0% of flights were cancelled, versus 1.8% nationally.
LGA to DEN on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 78.6% | 81 min | 2.1% | 2,020 |
| Delta Air Lines | 71.7% | 68 min | 4.3% | 1,032 |
| Frontier Airlines | 70.1% | 109 min | 3.3% | 121 |
| Southwest Airlines | 61.5% | 61 min | 3.5% | 1,494 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly LGA to DEN
On-time arrival % by scheduled departure hour (local time), 9,256 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 90.5% | 0.7% | 437 |
| 7am–8am | 86.2% | 2.1% | 1,641 |
| 8am–9am | 90.0% | 2.0% | 102 |
| 9am–10am | 72.4% | 3.6% | 139 |
| 10am–11am | 85.7% | 1.0% | 586 |
| 11am–12pm | 68.0% | 3.1% | 127 |
| 12pm–1pm | 85.2% | 0.5% | 1,080 |
| 1pm–2pm | 74.4% | 1.8% | 286 |
| 2pm–3pm | 67.5% | 2.5% | 774 |
| 3pm–4pm | 70.5% | 1.3% | 675 |
| 4pm–5pm | 60.8% | 2.0% | 852 |
| 5pm–6pm | 62.5% | 3.2% | 617 |
| 6pm–7pm | 63.8% | 3.5% | 1,047 |
| 7pm–8pm | 80.0% | 3.4% | 89 |
| 8pm–9pm | 53.7% | 4.7% | 211 |
| 9pm–10pm | 61.7% | 6.2% | 292 |
| 10pm–11pm | 67.4% | 4.4% | 298 |
| 11pm–12am | Limited data | 3 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on LGA to DEN
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 81.6% | +5.1 pts | 0.0% | 163 |
| Christmas & New Year (Dec 20 - Jan 3) | 73.5% | -2.9 pts | 2.3% | 353 |
| Summer peak (Jun 15 - Aug 15) | 63.3% | -13.2 pts | 5.2% | 1,627 |
| All other days | 76.5% | — | 1.7% | 7,113 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).