Best Time to Fly PBI to IAD: On-Time Stats by Hour & Airline
Palm Beach International → Washington Dulles International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 83.8% of West Palm Beach/Palm Beach (PBI) to Washington (IAD) flights arrived on time (333 scheduled flights). That is 6.2 points above the national average of 77.6%.
Among 2 airlines, United Airlines led with 84.5% on time and Republic Airways was last with 77.4%.
Over 24 months, Tuesday was the most reliable day (94% on time) and January the worst month (78%).
The cancellation rate was 1.2% (US average 1.8%).
PBI 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 | 84.5% | 67 min | 1.3% | 302 |
| Republic Airways | 77.4% | 50 min | 0.0% | 31 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PBI to IAD
On-time arrival % by scheduled departure hour (local time), 374 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 9am–10am | 87.8% | 1.5% | 133 |
| 12pm–1pm | 86.6% | 1.0% | 98 |
| 1pm–2pm | 81.8% | 0.9% | 112 |
| 6pm–7pm | 77.4% | 0.0% | 31 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PBI 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) | Limited data | 7 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 86.7% | +2.1 pts | 0.0% | 45 |
| All other days | 84.6% | — | 1.2% | 322 |
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).