IAD to BTV flight delays & on-time performance
Nonstop flights from Washington Dulles International Airport to Patrick Leahy Burlington International Airport · 441 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at IAD or BTV right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Washington (IAD) to Burlington (BTV) arrived on time 86% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1.6% were cancelled, and 4% arrived an hour or more late.
- Republic Airways was the most punctual airline here (89% on time); United Airlines was the least (68%).
- Departures scheduled around 8am did best (92% on time); around 5pm did worst (72%).
- Sunday was the most reliable day to fly (91% on time) and Saturday the least (81%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (45%).
Which airline is most on time from IAD to BTV?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 89% | 1.7% | 10 min | 3.2% | 420 |
| United Airlines | 68% | 1.3% | 15 min | 6.3% | 80 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 8am92%313 flights
- 12pm91%11 flights
- 5pm72%51 flights
- 10pm76%125 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday91%2.5% cancelled
- Tuesday84%0.0% cancelled
- Wednesday87%1.6% cancelled
- Thursday82%1.3% cancelled
- Friday85%0.0% cancelled
- Saturday81%1.7% cancelled
- Sunday91%4.1% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)45%
- Air traffic control & airport congestion21%
- Late-arriving aircraft19%
- Extreme weather14%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather63%
- Air traffic control & airport congestion25%
- Airline (crew, maintenance, cleaning, fueling)13%
- Security0%
IAD to BTV: common questions
- How often are IAD to BTV flights on time?
- 86% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Washington to Burlington cancelled?
- 1.6% of scheduled flights were cancelled (8 of 500).
- How long are typical delays?
- Across all flights the average arrival delay was 11 min (early arrivals count as zero). Flights that were late arrived 72 min behind schedule on average, and 3.7% of flights were an hour or more late.
- How long is taxi time at IAD?
- Flights on this route spent 20 min taxiing from the gate to takeoff on average.
Related routes
Return trip: BTV to IAD — 88% on time
More flights from Washington
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: IAD → BTV, nonstop flights by US airlines that report to the DOT. How we calculate this.