Patrick Leahy Burlington International in June 2025

66.2%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 June 2025, reporting carriers scheduled 598 domestic departures from Patrick Leahy Burlington International (BTV). 66.2% left less than 15 minutes late and 59.2% reached their destination on time; 6.2% were cancelled.

Nationally that month, 71.4% of flights departed on time and 70.3% arrived on time, so BTV departures were 5.2 points below the national departure figure.

A year earlier, in June 2024, the airport had 756 departures with 79.6% leaving on time: a change of −13.4 points, with flights down 21%.

Flights arriving at BTV that month were on time 67.2% of the time (597 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 33%, air carrier 30% and national aviation system 28%.

On time 59.2%
Arrived 15+ minutes late 33.6%
Cancelled 6.2%
Diverted 1.0%

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

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

Measure	Jun 2025	Jun 2024	BTV, 12 months to Jul 2026	All reported flights, Jun 2025
Departed on time	66.2%	79.6%	76.9%	71.4%
Arrived on time	59.2%	79.6%	71.8%	70.3%
Cancelled	6.2%	2.2%	2.9%	1.6%
Average departure delay (late minutes only)	33.2 min	17.5 min	24.0 min	22.1 min
Scheduled departures a day	20	25	17	20,386
Scheduled departures	598	756	6,084	611,575

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OH PSA Airlines	181	30%	57.5%	39.6 min	8.8%
YX Republic Airline	170	28%	67.1%	18.3 min	7.1%
UA United Airlines	91	15%	46.2%	27.9 min	2.2%
OO SkyWest Airlines	65	11%	41.5%	65.3 min	4.6%
AA American Airlines	51	9%	64.7%	29.7 min	2.0%
DL Delta Air Lines	33	6%	81.8%	-6.6 min	9.1%
MQ Envoy Air	4	1%	100.0%	-9.0 min	0.0%
F9 Frontier Airlines	3	1%	100.0%	3.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BTV–ORD	Burlington to Chicago	116	44.8%	48.7 min	3.4%
BTV–DCA	Burlington to Washington	115	55.7%	40.9 min	7.0%
BTV–PHL	Burlington to Philadelphia	95	62.1%	25.8 min	11.6%
BTV–IAD	Burlington to Washington	70	84.3%	6.1 min	2.9%
BTV–EWR	Burlington to Newark	65	56.9%	29.6 min	7.7%
BTV–CLT	Burlington to Charlotte	56	55.4%	41.3 min	5.4%
BTV–ATL	Burlington to Atlanta	33	81.8%	-6.6 min	9.1%
BTV–DEN	Burlington to Denver	31	35.5%	39.8 min	3.2%
BTV–DTW	Burlington to Detroit	14	78.6%	-7.8 min	0.0%
BTV–MCO	Burlington to Orlando	3	100.0%	3.7 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), June 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jun 2025	Minutes
Air carrier	30.3%	31.6%	6,228
Late-arriving aircraft	32.9%	40.6%	6,762
National Aviation System	28.2%	20.9%	5,793
Extreme weather	8.2%	6.9%	1,687
Security	0.4%	0.2%	87

20,557 delay minutes on 201 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 June 2025?

66.2% of 598 scheduled domestic departures left less than 15 minutes late, and 59.2% reached their destination on time. The national figures that month were 71.4% and 70.3%.

How does that compare with a year earlier?

In June 2024, 79.6% of 756 departures left on time and 2.2% were cancelled, against 66.2% and 6.2% in June 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for June 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.