Best Time to Fly TPA to IAD: On-Time Stats by Hour & Airline
Tampa International → Washington Dulles International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 85.1% of Tampa (TPA) to Washington (IAD) flights arrived on time (1,305 scheduled flights). That is 7.5 points above the national average of 77.6%.
Among 2 airlines, United Airlines led with 85.1% on time and Frontier Airlines was last with 85.1%.
Over 24 months, Tuesday was the most reliable day (86% on time) and July the worst month (73%).
The cancellation rate was 1.1% (US average 1.8%).
TPA to IAD 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 | 85.1% | 71 min | 0.7% | 1,125 |
| Frontier Airlines | 85.1% | 62 min | 3.3% | 180 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly TPA to IAD
On-time arrival % by scheduled departure hour (local time), 2,751 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 12 | |
| 6am–7am | 90.9% | 0.0% | 33 |
| 7am–8am | 94.1% | 0.0% | 34 |
| 8am–9am | 91.8% | 1.0% | 198 |
| 9am–10am | 90.8% | 1.6% | 617 |
| 10am–11am | Limited data | 7 | |
| 11am–12pm | 80.7% | 1.1% | 94 |
| 12pm–1pm | 85.7% | 3.6% | 253 |
| 1pm–2pm | 85.1% | 0.8% | 379 |
| 2pm–3pm | 70.2% | 0.7% | 294 |
| 3pm–4pm | 54.8% | 6.1% | 33 |
| 4pm–5pm | 75.8% | 0.0% | 33 |
| 5pm–6pm | Limited data | 17 | |
| 6pm–7pm | 70.7% | 0.8% | 482 |
| 7pm–8pm | 82.6% | 2.6% | 265 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on TPA to IAD
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) | 91.3% | +6.5 pts | 0.0% | 46 |
| Christmas & New Year (Dec 20 - Jan 3) | 72.9% | -11.9 pts | 0.0% | 118 |
| Summer peak (Jun 15 - Aug 15) | 73.4% | -11.3 pts | 1.6% | 513 |
| All other days | 84.8% | — | 1.7% | 2,074 |
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).