Logan International in December 2024

75.3%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 December 2024, reporting carriers scheduled 11,778 domestic departures from Logan International (BOS). 75.3% left less than 15 minutes late and 74.3% reached their destination on time; 1.4% were cancelled.

Nationally that month, 77.8% of flights departed on time and 78.1% arrived on time, so BOS departures were 2.5 points below the national departure figure.

A year earlier, in December 2023, the airport had 10,660 departures with 80.5% leaving on time: a change of −5.2 points, with flights up 10%.

Flights arriving at BOS that month were on time 74.7% of the time (11,769 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 39%, air carrier 32% and national aviation system 24%.

On time 74.3%
Arrived 15+ minutes late 24.1%
Cancelled 1.4%
Diverted 0.2%

Every scheduled departure from BOS in December 2024, judged by arrival at the destination.

December 2024 against a year earlier, the airport's year and the nation

Measure	Dec 2024	Dec 2023	BOS, 12 months to Jul 2026	All reported flights, Dec 2024
Departed on time	75.3%	80.5%	74.4%	77.8%
Arrived on time	74.3%	82.6%	73.3%	78.1%
Cancelled	1.4%	0.8%	2.8%	0.7%
Average departure delay (late minutes only)	18.3 min	14.3 min	18.3 min	16.6 min
Scheduled departures a day	393	355	393	19,686
Scheduled departures	11,778	10,660	143,447	590,581

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
B6 JetBlue Airways	3,486	30%	65.1%	16.1 min	2.1%
YX Republic Airline	2,286	19%	82.0%	1.5 min	1.0%
DL Delta Air Lines	2,167	18%	76.3%	6.3 min	0.7%
AA American Airlines	1,238	11%	78.5%	6.1 min	1.5%
UA United Airlines	973	8%	81.0%	3.5 min	0.9%
WN Southwest Airlines	545	5%	80.0%	1.0 min	1.7%
NK Spirit Airlines	519	4%	69.4%	16.9 min	1.7%
AS Alaska Airlines	186	2%	74.7%	4.8 min	0.5%
F9 Frontier Airlines	170	1%	65.3%	20.0 min	1.2%
MQ Envoy Air	152	1%	73.0%	14.0 min	2.0%
G4 Allegiant Air	38	0%	68.4%	9.4 min	5.3%
HA Hawaiian Airlines	18	0%	66.7%	15.8 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
BOS–DCA	Boston to Washington	729	74.8%	9.8 min	1.8%
BOS–LGA	Boston to New York	509	76.6%	7.3 min	2.0%
BOS–ORD	Boston to Chicago	505	81.4%	3.9 min	0.4%
BOS–MCO	Boston to Orlando	477	68.8%	16.9 min	1.5%
BOS–ATL	Boston to Atlanta	474	73.0%	6.7 min	1.7%
BOS–JFK	Boston to New York	400	70.8%	11.2 min	2.3%
BOS–PHL	Boston to Philadelphia	394	72.6%	12.4 min	1.5%
BOS–MIA	Boston to Miami	387	69.8%	12.0 min	2.1%
BOS–SFO	Boston to San Francisco	377	74.3%	4.0 min	0.5%
BOS–CLT	Boston to Charlotte	374	78.9%	13.3 min	1.3%
BOS–LAX	Boston to Los Angeles	372	78.2%	4.3 min	0.0%
BOS–FLL	Boston to Fort Lauderdale	354	62.7%	23.4 min	2.0%

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), December 2024.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2024	Minutes
Air carrier	31.5%	34.3%	63,991
Late-arriving aircraft	39.1%	40.2%	79,378
National Aviation System	23.8%	17.8%	48,434
Extreme weather	5.4%	7.5%	11,053
Security	0.2%	0.2%	415

203,271 delay minutes on 2,839 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 December 2024?

75.3% of 11,778 scheduled domestic departures left less than 15 minutes late, and 74.3% reached their destination on time. The national figures that month were 77.8% and 78.1%.

How does that compare with a year earlier?

In December 2023, 80.5% of 10,660 departures left on time and 0.8% were cancelled, against 75.3% and 1.4% in December 2024.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for December 2024; 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.