Best Time to Fly IAD to BTV: On-Time Stats by Hour & Airline
Washington Dulles International → Patrick Leahy Burlington International
Data through July 2026 · Last updated October 18, 2026
500 flights were scheduled from Washington (IAD) to Burlington (BTV) in the last 12 months, and 85.9% of those that flew arrived on time, 8.3 points above the US average of 77.6%.
Among 2 airlines, Republic Airways led with 89.3% on time and United Airlines was last with 68.3%.
Over 24 months, Monday was the most reliable day (89% on time) and June the worst month (71%).
The cancellation rate was 1.6% (US average 1.8%).
IAD to BTV 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 |
|---|---|---|---|---|
| Republic Airways | 89.3% | 87 min | 1.7% | 420 |
| United Airlines | 68.3% | 43 min | 1.2% | 80 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly IAD to BTV
On-time arrival % by scheduled departure hour (local time), 1,236 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 91.8% | 1.1% | 655 |
| 9am–10am | Limited data | 13 | |
| 12pm–1pm | 78.8% | 0.0% | 52 |
| 3pm–4pm | 68.5% | 0.0% | 73 |
| 5pm–6pm | 73.4% | 4.6% | 130 |
| 10pm–11pm | 80.1% | 5.1% | 313 |
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 BTV
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 | 21 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 76.4% | -9.7 pts | 0.0% | 56 |
| Summer peak (Jun 15 - Aug 15) | 81.2% | -4.8 pts | 7.3% | 275 |
| All other days | 86.0% | — | 1.0% | 884 |
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).