Best Time to Fly IAD to RSW: On-Time Stats by Hour & Airline
Washington Dulles International → Southwest Florida International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 87.3% of Washington (IAD) to Fort Myers (RSW) flights arrived on time (468 scheduled flights). That is 9.7 points above the national average of 77.6%.
United Airlines was the only reporting airline with regular flights on this route.
April has been the best month (93% on time) and Sunday the weakest day of the week (78%).
0.6% of flights were cancelled, versus 1.8% nationally.
IAD to RSW 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 | 87.3% | 86 min | 0.6% | 468 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly IAD to RSW
On-time arrival % by scheduled departure hour (local time), 982 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 87.4% | 0.0% | 311 |
| 9am–10am | 92.8% | 1.8% | 284 |
| 12pm–1pm | Limited data | 19 | |
| 1pm–2pm | 81.4% | 0.8% | 250 |
| 5pm–6pm | 81.4% | 0.0% | 118 |
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 RSW
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) | Limited data | 19 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 83.0% | -3.7 pts | 0.0% | 60 |
| Summer peak (Jun 15 - Aug 15) | 90.3% | +3.5 pts | 0.0% | 124 |
| All other days | 86.8% | — | 0.9% | 779 |
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).