Washington (IAD) to Burlington (BTV): On-Time Performance
Data through May 2026
When you fly IAD to BTV matters as much as anything else about the booking: the route swung from 98% on-time in April 2025 to just 65% in June 2025. Across the full period the route averages 84% on-time against a national 78%. Morning departures also hold up better than evening ones (91% vs 77%), which matters most in the rough months.
- On-time
- 84%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 2.0%
- Flights/day
- 1.6
- last 12 months
- Duration
- 1h 39m
- scheduled
- Distance
- 441 mi
Best airline from IAD to BTV
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 85% | 13 min | 2.1% | 1,175 |
| United Airlines | 68% | 18 min | 0.9% | 111 |
Monthly on-time trend
Best time to fly from IAD to BTV
Aim for departures around 8 a.m. (91% on-time); avoid 3 p.m. departures (69%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 87% | 8 min |
| Tuesdaybest | 88% | 9 min |
| Wednesday | 82% | 10 min |
| Thursday | 83% | 16 min |
| Friday | 79% | 18 min |
| Saturday | 80% | 16 min |
| Sunday | 87% | 15 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft31%
- Airline operations33%
- National airspace system22%
- Weather15%
Frequently asked questions
- How often are flights from IAD to BTV delayed?
- 16% of IAD–BTV flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 13 minutes.
- Which airline is most reliable from IAD to BTV?
- Republic Airways has the best on-time record on this route at 85%, based on 1,175 flights. 2 airlines flew IAD–BTV frequently enough to compare in this period.
- What is the best time of day to fly from IAD to BTV?
- Departures around 8 a.m. have the best record (91% on-time), while departures around 3 p.m. have the worst (69%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from IAD to BTV?
- The scheduled IAD–BTV flight time averages 1h 39m over 441 miles. Actual arrival times vary — flights on this route land 15+ minutes late 16% of the time.
- How often are IAD to BTV flights cancelled?
- 2% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What is the worst month to fly from IAD to BTV?
- June 2025 was the roughest month in this dataset, with only 65% of arrivals on time. The best was April 2025 at 98%. If your dates are flexible, that 34-point gap is worth planning around.
Explore related pages
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Based on 1,286 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.