United Airlines in August 2023

79.2%arrived 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 August 2023, United Airlines (UA) reported 66,801 scheduled domestic flights. 79.2% arrived on time, 1.2% were cancelled and 0.3% diverted.

All reporting carriers together recorded 76.9% on time and 1.5% cancelled that month, so the carrier was 2.3 points above the combined figure.

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 43%, air carrier 33% and national aviation system 20%.

On time 79.2%
Arrived 15+ minutes late 19.3%
Cancelled 1.2%
Diverted 0.3%

Every scheduled domestic flight reported by United Airlines in August 2023.

August 2023 against a year earlier, the carrier's year and all carriers

Measure	Aug 2023	Year earlier	UA, 12 months to Jul 2026	All carriers, Aug 2023
Arrived on time	79.2%	—	78.2%	76.9%
Departed on time	79.4%	—	80.6%	76.7%
Cancelled	1.2%	—	1.0%	1.5%
Average arrival delay	4.8 min	—	6.3 min	8.4 min
Scheduled flights a day	2,227	—	2,262	20,100
Scheduled flights	66,801	—	825,693	602,987

110 airports and 794 routes had UA flights that month.

Busiest airports that month

Airport	Departures	On time	Avg arrival delay	Cancelled
DEN Denver	8,712	76.4%	7.5 min	0.9%
ORD Chicago	8,289	76.4%	7.0 min	1.4%
IAH Houston	6,015	79.8%	3.7 min	0.8%
EWR Newark	5,863	74.2%	6.8 min	1.4%
SFO San Francisco	4,412	79.5%	3.4 min	1.0%
IAD Washington	2,963	78.1%	5.2 min	1.1%
LAX Los Angeles	2,410	84.9%	-3.3 min	1.5%
BOS Boston	1,106	77.8%	5.4 min	0.7%
LAS Las Vegas	1,082	79.3%	6.6 min	0.9%
MCO Orlando	1,052	77.0%	5.2 min	1.2%
SEA Seattle	974	83.4%	0.8 min	0.3%
SAN San Diego	971	83.7%	-0.1 min	1.4%
AUS Austin	826	84.6%	0.3 min	1.5%
CLE Cleveland	806	86.4%	-2.0 min	1.4%
DFW Dallas/Fort Worth	775	80.4%	6.0 min	1.0%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of UA flights that arrived on time, by scheduled departure hour (local time at each origin), August 2023.

Delay causes

BTS cause category	Share of delay minutes	All carriers, Aug 2023	Minutes
Air carrier	33.1%	36.7%	293,062
Late-arriving aircraft	42.7%	42.2%	377,427
National Aviation System	19.6%	15.7%	173,547
Extreme weather	4.5%	5.1%	39,760
Security	0.1%	0.2%	622

884,418 delay minutes on 12,899 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

What share of United Airlines flights were on time in August 2023?

79.2% of 66,801 scheduled domestic flights arrived less than 15 minutes late; all reporting carriers together recorded 76.9% that month.

How does that compare with a year earlier?

August 2022 is outside the 36 months on file, or the carrier did not report that month.

Provenance

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