Patrick Leahy Burlington International in April 2025

86.4%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 April 2025, reporting carriers scheduled 572 domestic departures from Patrick Leahy Burlington International (BTV). 86.4% left less than 15 minutes late and 83.2% reached their destination on time; 0.9% were cancelled.

Nationally that month, 80.6% of flights departed on time and 79.5% arrived on time, so BTV departures were 5.8 points above the national departure figure.

A year earlier, in April 2024, the airport had 508 departures with 88.4% leaving on time: a change of −2.0 points, with flights up 13%.

Flights arriving at BTV that month were on time 83.6% of the time (572 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 38%, national aviation system 36% and late-arriving aircraft 23%.

On time 83.2%
Arrived 15+ minutes late 15.6%
Cancelled 0.9%
Diverted 0.3%

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

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

Measure	Apr 2025	Apr 2024	BTV, 12 months to Jul 2026	All reported flights, Apr 2025
Departed on time	86.4%	88.4%	76.9%	80.6%
Arrived on time	83.2%	85.0%	71.8%	79.5%
Cancelled	0.9%	2.0%	2.9%	0.8%
Average departure delay (late minutes only)	12.6 min	10.6 min	24.0 min	14.1 min
Scheduled departures a day	19	17	17	19,465
Scheduled departures	572	508	6,084	583,950

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
YX Republic Airline	181	32%	86.2%	1.0 min	0.6%
OH PSA Airlines	173	30%	72.8%	15.3 min	1.7%
UA United Airlines	60	10%	86.7%	-1.1 min	1.7%
OO SkyWest Airlines	58	10%	98.3%	-11.8 min	0.0%
AA American Airlines	53	9%	79.2%	0.4 min	0.0%
DL Delta Air Lines	32	6%	96.9%	-11.6 min	0.0%
F9 Frontier Airlines	15	3%	80.0%	2.5 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BTV–DCA	Burlington to Washington	116	81.9%	-2.7 min	0.0%
BTV–PHL	Burlington to Philadelphia	90	67.8%	30.8 min	2.2%
BTV–ORD	Burlington to Chicago	80	91.3%	-4.4 min	0.0%
BTV–EWR	Burlington to Newark	60	68.3%	20.9 min	3.3%
BTV–DTW	Burlington to Detroit	58	98.3%	-11.8 min	0.0%
BTV–CLT	Burlington to Charlotte	57	78.9%	-1.1 min	1.8%
BTV–IAD	Burlington to Washington	56	94.6%	-8.1 min	0.0%
BTV–ATL	Burlington to Atlanta	32	96.9%	-11.6 min	0.0%
BTV–MCO	Burlington to Orlando	10	80.0%	4.1 min	0.0%
BTV–LGA	Burlington to New York	8	100.0%	-5.5 min	0.0%
BTV–TPA	Burlington to Tampa	5	80.0%	-0.8 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), April 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2025	Minutes
Air carrier	38.4%	32.7%	2,835
Late-arriving aircraft	22.5%	39.4%	1,662
National Aviation System	35.7%	22.2%	2,636
Extreme weather	3.3%	5.5%	247
Security	0.0%	0.2%	0

7,380 delay minutes on 89 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 April 2025?

86.4% of 572 scheduled domestic departures left less than 15 minutes late, and 83.2% reached their destination on time. The national figures that month were 80.6% and 79.5%.

How does that compare with a year earlier?

In April 2024, 88.4% of 508 departures left on time and 2.0% were cancelled, against 86.4% and 0.9% in April 2025.

Provenance

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