Patrick Leahy Burlington International in August 2025

78.4%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In August 2025, reporting carriers scheduled 579 domestic departures from Patrick Leahy Burlington International (BTV). 78.4% left less than 15 minutes late and 73.1% reached their destination on time; 1.9% were cancelled.

Nationally that month, 76.8% of flights departed on time and 76.3% arrived on time, so BTV departures were 1.6 points above the national departure figure.

A year earlier, in August 2024, the airport had 861 departures with 77.8% leaving on time: a change of +0.6 points, with flights down 33%.

Flights arriving at BTV that month were on time 76.7% of the time (579 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 47%, late-arriving aircraft 25% and national aviation system 17%.

On time 73.1%
Arrived 15+ minutes late 23.8%
Cancelled 1.9%
Diverted 1.2%

Every scheduled departure from BTV in August 2025, judged by arrival at the destination.

August 2025 against a year earlier, the airport's year and the nation

Measure	Aug 2025	Aug 2024	BTV, 12 months to Jul 2026	All reported flights, Aug 2025
Departed on time	78.4%	77.8%	76.9%	76.8%
Arrived on time	73.1%	72.9%	71.8%	76.3%
Cancelled	1.9%	4.8%	2.9%	1.1%
Average departure delay (late minutes only)	28.3 min	17.3 min	24.0 min	17.6 min
Scheduled departures a day	19	29	17	20,079
Scheduled departures	579	861	6,084	602,378

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OH PSA Airlines	176	30%	79.5%	13.9 min	1.1%
YX Republic Airline	127	22%	78.7%	14.0 min	0.8%
UA United Airlines	96	17%	61.5%	42.6 min	2.1%
AA American Airlines	87	15%	70.1%	15.9 min	2.3%
OO SkyWest Airlines	53	9%	54.7%	47.8 min	5.7%
DL Delta Air Lines	36	6%	83.3%	24.6 min	2.8%
F9 Frontier Airlines	4	1%	100.0%	-19.5 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BTV–DCA	Burlington to Washington	118	73.7%	11.1 min	2.5%
BTV–ORD	Burlington to Chicago	115	60.9%	43.7 min	4.3%
BTV–PHL	Burlington to Philadelphia	91	75.8%	12.1 min	1.1%
BTV–IAD	Burlington to Washington	71	87.3%	14.7 min	0.0%
BTV–CLT	Burlington to Charlotte	59	83.1%	24.4 min	0.0%
BTV–EWR	Burlington to Newark	51	66.7%	13.6 min	2.0%
BTV–ATL	Burlington to Atlanta	36	83.3%	24.6 min	2.8%
BTV–DEN	Burlington to Denver	34	52.9%	47.0 min	0.0%
BTV–MCO	Burlington to Orlando	4	100.0%	-19.5 min	0.0%

By scheduled departure hour

100

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), August 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2025	Minutes
Air carrier	46.6%	33.1%	7,734
Late-arriving aircraft	24.5%	40.5%	4,072
National Aviation System	16.9%	19.2%	2,811
Extreme weather	12.0%	7.0%	1,989
Security	0.0%	0.1%	0

16,606 delay minutes on 138 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left BTV on time in August 2025?

78.4% of 579 scheduled domestic departures left less than 15 minutes late, and 73.1% reached their destination on time. The national figures that month were 76.8% and 76.3%.

How does that compare with a year earlier?

In August 2024, 77.8% of 861 departures left on time and 4.8% were cancelled, against 78.4% and 1.9% in August 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for August 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for BTV · methodology · corrections.