Patrick Leahy Burlington International in July 2025

63.3%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 July 2025, reporting carriers scheduled 648 domestic departures from Patrick Leahy Burlington International (BTV). 63.3% left less than 15 minutes late and 57.7% reached their destination on time; 9.4% were cancelled.

Nationally that month, 69.7% of flights departed on time and 69.0% arrived on time, so BTV departures were 6.4 points below the national departure figure.

A year earlier, in July 2024, the airport had 795 departures with 73.1% leaving on time: a change of −9.8 points, with flights down 18%.

Flights arriving at BTV that month were on time 64.5% of the time (648 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 28%, extreme weather 26% and late-arriving aircraft 24%.

On time 57.7%
Arrived 15+ minutes late 32.1%
Cancelled 9.4%
Diverted 0.8%

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

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

Measure	Jul 2025	Jul 2024	BTV, 12 months to Jul 2026	All reported flights, Jul 2025
Departed on time	63.3%	73.1%	76.9%	69.7%
Arrived on time	57.7%	69.6%	71.8%	69.0%
Cancelled	9.4%	5.7%	2.9%	2.5%
Average departure delay (late minutes only)	49.2 min	29.5 min	24.0 min	24.3 min
Scheduled departures a day	22	27	17	21,048
Scheduled departures	648	795	6,084	631,428

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
YX Republic Airline	219	34%	58.9%	34.6 min	12.8%
OH PSA Airlines	175	27%	56.6%	58.6 min	14.3%
UA United Airlines	96	15%	50.0%	44.2 min	2.1%
AA American Airlines	62	10%	67.7%	46.9 min	4.8%
OO SkyWest Airlines	60	9%	41.7%	72.6 min	5.0%
DL Delta Air Lines	35	5%	85.7%	32.5 min	0.0%
F9 Frontier Airlines	1	0%	100.0%	-19.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BTV–ORD	Burlington to Chicago	121	47.9%	52.6 min	2.5%
BTV–DCA	Burlington to Washington	116	54.3%	92.2 min	16.4%
BTV–IAD	Burlington to Washington	96	69.8%	15.9 min	11.5%
BTV–PHL	Burlington to Philadelphia	96	53.1%	38.7 min	13.5%
BTV–EWR	Burlington to Newark	92	58.7%	47.1 min	12.0%
BTV–CLT	Burlington to Charlotte	56	62.5%	16.2 min	3.6%
BTV–ATL	Burlington to Atlanta	35	85.7%	32.5 min	0.0%
BTV–DEN	Burlington to Denver	35	42.9%	66.0 min	5.7%
BTV–MCO	Burlington to Orlando	1	100.0%	-19.0 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), July 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jul 2025	Minutes
Air carrier	27.8%	31.1%	8,445
Late-arriving aircraft	24.4%	40.8%	7,412
National Aviation System	20.0%	20.7%	6,074
Extreme weather	26.1%	7.3%	7,934
Security	1.8%	0.1%	550

30,415 delay minutes on 208 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 July 2025?

63.3% of 648 scheduled domestic departures left less than 15 minutes late, and 57.7% reached their destination on time. The national figures that month were 69.7% and 69.0%.

How does that compare with a year earlier?

In July 2024, 73.1% of 795 departures left on time and 5.7% were cancelled, against 63.3% and 9.4% in July 2025.

Provenance

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