Newark Liberty International in September 2023

74.9%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 September 2023, reporting carriers scheduled 11,373 domestic departures from Newark Liberty International (EWR). 74.9% left less than 15 minutes late and 76.1% reached their destination on time; 4.9% were cancelled.

Nationally that month, 80.5% of flights departed on time and 80.1% arrived on time, so EWR departures were 5.6 points below the national departure figure.

Flights arriving at EWR that month were on time 73.6% of the time (11,368 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 34%, late-arriving aircraft 33% and national aviation system 23%.

On time 76.1%
Arrived 15+ minutes late 18.7%
Cancelled 4.9%
Diverted 0.2%

Every scheduled departure from EWR in September 2023, judged by arrival at the destination.

September 2023 against a year earlier, the airport's year and the nation

Measure	Sep 2023	Year earlier	EWR, 12 months to Jul 2026	All reported flights, Sep 2023
Departed on time	74.9%	—	77.3%	80.5%
Arrived on time	76.1%	—	75.3%	80.1%
Cancelled	4.9%	—	3.1%	1.2%
Average departure delay (late minutes only)	18.5 min	—	17.0 min	14.1 min
Scheduled departures a day	379	—	336	18,978
Scheduled departures	11,373	—	122,705	569,338

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
UA United Airlines	5,726	50%	75.7%	7.3 min	3.8%
YX Republic Airline	2,649	23%	78.0%	-3.5 min	9.4%
NK Spirit Airlines	831	7%	71.7%	11.0 min	3.5%
AA American Airlines	579	5%	81.9%	2.1 min	4.0%
DL Delta Air Lines	569	5%	78.7%	17.9 min	1.1%
B6 JetBlue Airways	478	4%	67.4%	26.9 min	3.6%
AS Alaska Airlines	327	3%	72.2%	14.5 min	3.1%
9E Endeavor Air	134	1%	77.6%	3.3 min	6.0%
G4 Allegiant Air	48	0%	91.7%	-15.1 min	0.0%
MQ Envoy Air	32	0%	84.4%	-5.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
EWR–MCO	Newark to Orlando	531	68.0%	18.5 min	3.4%
EWR–LAX	Newark to Los Angeles	509	71.1%	17.3 min	3.3%
EWR–ATL	Newark to Atlanta	505	74.7%	14.2 min	2.0%
EWR–ORD	Newark to Chicago	467	76.9%	5.8 min	3.9%
EWR–FLL	Newark to Fort Lauderdale	355	71.0%	10.2 min	4.2%
EWR–SFO	Newark to San Francisco	355	76.3%	5.5 min	2.3%
EWR–DTW	Newark to Detroit	336	75.9%	12.5 min	6.8%
EWR–IAH	Newark to Houston	328	74.1%	14.8 min	4.0%
EWR–BOS	Newark to Boston	327	67.9%	14.4 min	9.5%
EWR–CLT	Newark to Charlotte	327	78.0%	13.0 min	4.9%
EWR–MIA	Newark to Miami	325	64.3%	13.8 min	5.8%
EWR–DEN	Newark to Denver	297	81.8%	-0.2 min	4.0%

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), September 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2023	Minutes
Air carrier	34.2%	36.4%	64,718
Late-arriving aircraft	32.8%	38.3%	62,045
National Aviation System	23.4%	19.9%	44,414
Extreme weather	9.5%	5.1%	18,031
Security	0.1%	0.2%	197

189,405 delay minutes on 2,132 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 EWR on time in September 2023?

74.9% of 11,373 scheduled domestic departures left less than 15 minutes late, and 76.1% reached their destination on time. The national figures that month were 80.5% and 80.1%.

How does that compare with a year earlier?

September 2022 is outside the 36 months on file, or the airport had too few reported flights that month.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2023; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for EWR · methodology · corrections.