United Airlines in September 2024

86.2%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 September 2024, United Airlines (UA) reported 64,212 scheduled domestic flights. 86.2% arrived on time, 0.5% were cancelled and 0.1% diverted.

All reporting carriers together recorded 83.9% on time and 0.6% cancelled that month, so the carrier was 2.3 points above the combined figure.

A year earlier, in September 2023, it reported 62,591 flights with 81.4% on time: a change of +4.8 points.

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 41%, air carrier 34% and national aviation system 23%.

On time 86.2%
Arrived 15+ minutes late 13.2%
Cancelled 0.5%
Diverted 0.1%

Every scheduled domestic flight reported by United Airlines in September 2024.

September 2024 against a year earlier, the carrier's year and all carriers

Measure	Sep 2024	Sep 2023	UA, 12 months to Jul 2026	All carriers, Sep 2024
Arrived on time	86.2%	81.4%	78.2%	83.9%
Departed on time	87.3%	82.5%	80.6%	84.4%
Cancelled	0.5%	1.2%	1.0%	0.6%
Average arrival delay	-1.7 min	3.4 min	6.3 min	1.0 min
Scheduled flights a day	2,140	2,086	2,262	19,421
Scheduled flights	64,212	62,591	825,693	582,622

121 airports and 805 routes had UA flights that month.

Busiest airports that month

Airport	Departures	On time	Avg arrival delay	Cancelled
DEN Denver	8,637	84.8%	0.6 min	0.3%
ORD Chicago	8,155	84.9%	-1.4 min	0.3%
IAH Houston	5,712	83.7%	0.5 min	0.5%
EWR Newark	5,483	81.7%	0.7 min	0.8%
SFO San Francisco	4,490	86.5%	-1.6 min	0.2%
IAD Washington	2,645	87.5%	-3.3 min	0.6%
LAX Los Angeles	2,300	90.6%	-7.5 min	0.4%
LAS Las Vegas	1,173	86.1%	-1.6 min	0.3%
BOS Boston	1,105	87.0%	-4.4 min	0.2%
MCO Orlando	990	85.3%	-1.8 min	0.3%
SAN San Diego	869	86.9%	-4.9 min	0.1%
SEA Seattle	847	86.0%	0.2 min	0.2%
AUS Austin	813	89.2%	-1.6 min	0.1%
PHX Phoenix	806	89.1%	-6.5 min	0.4%
DFW Dallas/Fort Worth	744	88.8%	-2.2 min	0.3%

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), September 2024.

Delay causes

BTS cause category	Share of delay minutes	All carriers, Sep 2024	Minutes
Air carrier	34.1%	38.6%	170,378
Late-arriving aircraft	40.6%	38.4%	203,306
National Aviation System	22.6%	18.2%	112,834
Extreme weather	2.7%	4.8%	13,718
Security	0.0%	0.1%	0

500,236 delay minutes on 8,451 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 September 2024?

86.2% of 64,212 scheduled domestic flights arrived less than 15 minutes late; all reporting carriers together recorded 83.9% that month.

How does that compare with a year earlier?

In September 2023 the carrier reported 62,591 flights with 81.4% on time and 1.2% cancelled, against 86.2% and 0.5% in September 2024.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2024; public domain. Domestic scheduled flights, totals and averages only. The site's data runs through July 2026. Full record for United Airlines · methodology · corrections.