Logan International in April 2025

82.6%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 12,413 domestic departures from Logan International (BOS). 82.6% left less than 15 minutes late and 80.0% reached their destination on time; 0.3% were cancelled.

Nationally that month, 80.6% of flights departed on time and 79.5% arrived on time, so BOS departures were 2.0 points above the national departure figure.

A year earlier, in April 2024, the airport had 11,591 departures with 80.6% leaving on time: a change of +2.0 points, with flights up 7%.

Flights arriving at BOS that month were on time 82.1% of the time (12,417 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 37%, late-arriving aircraft 31% and national aviation system 30%.

On time 80.0%
Arrived 15+ minutes late 19.5%
Cancelled 0.3%
Diverted 0.2%

Every scheduled departure from BOS 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	BOS, 12 months to Jul 2026	All reported flights, Apr 2025
Departed on time	82.6%	80.6%	74.4%	80.6%
Arrived on time	80.0%	79.8%	73.3%	79.5%
Cancelled	0.3%	1.0%	2.8%	0.8%
Average departure delay (late minutes only)	12.5 min	14.5 min	18.3 min	14.1 min
Scheduled departures a day	414	386	393	19,465
Scheduled departures	12,413	11,591	143,447	583,950

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
B6 JetBlue Airways	3,558	29%	81.1%	0.0 min	0.1%
YX Republic Airline	2,680	22%	80.7%	1.3 min	0.3%
DL Delta Air Lines	2,160	17%	77.3%	7.2 min	0.4%
AA American Airlines	1,290	10%	80.2%	8.7 min	0.9%
UA United Airlines	1,048	8%	79.9%	6.4 min	0.5%
NK Spirit Airlines	588	5%	79.6%	2.8 min	0.2%
WN Southwest Airlines	535	4%	80.7%	4.4 min	0.0%
AS Alaska Airlines	174	1%	82.8%	-2.1 min	0.0%
MQ Envoy Air	155	1%	82.6%	-0.6 min	0.6%
F9 Frontier Airlines	146	1%	67.8%	20.2 min	2.1%
G4 Allegiant Air	62	0%	88.7%	0.4 min	0.0%
HA Hawaiian Airlines	17	0%	76.5%	10.9 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BOS–DCA	Boston to Washington	768	81.1%	2.5 min	0.1%
BOS–LGA	Boston to New York	635	82.8%	-1.7 min	0.0%
BOS–ORD	Boston to Chicago	543	76.8%	7.9 min	1.1%
BOS–MCO	Boston to Orlando	499	81.4%	-1.2 min	0.2%
BOS–ATL	Boston to Atlanta	463	76.7%	5.8 min	0.6%
BOS–PHL	Boston to Philadelphia	460	79.8%	6.4 min	0.2%
BOS–MIA	Boston to Miami	414	83.6%	-0.4 min	0.5%
BOS–JFK	Boston to New York	411	81.8%	0.8 min	0.2%
BOS–CLT	Boston to Charlotte	373	86.3%	1.2 min	0.3%
BOS–SFO	Boston to San Francisco	369	81.3%	1.2 min	0.0%
BOS–LAX	Boston to Los Angeles	363	82.4%	5.0 min	0.0%
BOS–FLL	Boston to Fort Lauderdale	358	79.6%	1.4 min	0.3%

By scheduled departure hour

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	37.2%	32.7%	55,977
Late-arriving aircraft	30.7%	39.4%	46,201
National Aviation System	30.4%	22.2%	45,810
Extreme weather	1.7%	5.5%	2,619
Security	0.0%	0.2%	21

150,628 delay minutes on 2,422 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 BOS on time in April 2025?

82.6% of 12,413 scheduled domestic departures left less than 15 minutes late, and 80.0% 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, 80.6% of 11,591 departures left on time and 1.0% were cancelled, against 82.6% and 0.3% 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 BOS · methodology · corrections.