Best Time to Fly IAD to MCO: On-Time Stats by Hour & Airline
Washington Dulles International → Orlando International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 81.1% of Washington (IAD) to Orlando (MCO) flights arrived on time (2,177 scheduled flights). That is 3.5 points above the national average of 77.6%.
United Airlines was the most punctual of the 2 airlines on the route at 82.6%, while Frontier Airlines trailed at 71.3%.
September has been the best month (89% on time) and Sunday the weakest day of the week (71%).
1.1% of flights were cancelled, versus 1.8% nationally.
IAD to MCO 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 | 82.6% | 69 min | 0.8% | 1,888 |
| Frontier Airlines | 71.3% | 83 min | 2.4% | 289 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly IAD to MCO
On-time arrival % by scheduled departure hour (local time), 4,265 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 82.2% | 1.4% | 725 |
| 9am–10am | 87.9% | 0.6% | 490 |
| 10am–11am | 81.4% | 0.9% | 114 |
| 11am–12pm | Limited data | 19 | |
| 12pm–1pm | 83.8% | 0.7% | 707 |
| 1pm–2pm | 70.0% | 3.7% | 135 |
| 2pm–3pm | 71.9% | 0.0% | 32 |
| 3pm–4pm | 62.4% | 0.0% | 206 |
| 4pm–5pm | 86.9% | 0.0% | 99 |
| 5pm–6pm | 70.0% | 1.2% | 776 |
| 6pm–7pm | 76.5% | 1.6% | 121 |
| 7pm–8pm | 71.6% | 3.9% | 77 |
| 8pm–9pm | Limited data | 29 | |
| 9pm–10pm | 58.3% | 0.0% | 36 |
| 10pm–11pm | 82.0% | 0.7% | 699 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on IAD to MCO
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) | 78.8% | -2.6 pts | 1.2% | 81 |
| Christmas & New Year (Dec 20 - Jan 3) | 77.0% | -4.4 pts | 0.6% | 176 |
| Summer peak (Jun 15 - Aug 15) | 66.6% | -14.8 pts | 1.9% | 691 |
| All other days | 81.4% | — | 0.9% | 3,317 |
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).