Chicago O'Hare International in June 2025

70.2%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 June 2025, reporting carriers scheduled 29,641 domestic departures from Chicago O'Hare International (ORD). 70.2% left less than 15 minutes late and 68.2% reached their destination on time; 0.9% were cancelled.

Nationally that month, 71.4% of flights departed on time and 70.3% arrived on time, so ORD departures were 1.2 points below the national departure figure.

A year earlier, in June 2024, the airport had 24,207 departures with 69.8% leaving on time: a change of +0.4 points, with flights up 22%.

Flights arriving at ORD that month were on time 70.3% of the time (29,630 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 40%, air carrier 36% and national aviation system 19%.

On time 68.2%
Arrived 15+ minutes late 30.5%
Cancelled 0.9%
Diverted 0.4%

Every scheduled departure from ORD in June 2025, judged by arrival at the destination.

June 2025 against a year earlier, the airport's year and the nation

Measure	Jun 2025	Jun 2024	ORD, 12 months to Jul 2026	All reported flights, Jun 2025
Departed on time	70.2%	69.8%	71.4%	71.4%
Arrived on time	68.2%	68.0%	69.4%	70.3%
Cancelled	0.9%	1.4%	2.8%	1.6%
Average departure delay (late minutes only)	24.4 min	24.6 min	22.3 min	22.1 min
Scheduled departures a day	988	807	986	20,386
Scheduled departures	29,641	24,207	359,911	611,575

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
UA United Airlines	8,116	27%	73.4%	11.3 min	0.3%
OO SkyWest Airlines	6,114	21%	62.1%	27.8 min	0.6%
AA American Airlines	5,577	19%	62.0%	26.9 min	2.5%
MQ Envoy Air	4,603	16%	72.8%	10.2 min	0.5%
YX Republic Airline	2,200	7%	77.5%	8.3 min	0.3%
DL Delta Air Lines	1,079	4%	65.5%	24.4 min	1.6%
NK Spirit Airlines	546	2%	74.9%	13.5 min	0.5%
WN Southwest Airlines	420	1%	65.7%	16.4 min	0.2%
AS Alaska Airlines	334	1%	65.0%	19.2 min	0.0%
F9 Frontier Airlines	307	1%	48.2%	42.2 min	3.6%
OH PSA Airlines	234	1%	47.4%	59.3 min	3.8%
B6 JetBlue Airways	111	0%	77.5%	18.2 min	0.9%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ORD–LGA	Chicago to New York	977	64.6%	27.0 min	2.9%
ORD–LAX	Chicago to Los Angeles	678	73.7%	15.4 min	0.9%
ORD–BOS	Chicago to Boston	670	69.0%	18.4 min	0.4%
ORD–DFW	Chicago to Dallas/Fort Worth	636	61.5%	27.4 min	2.2%
ORD–SEA	Chicago to Seattle	571	68.5%	16.5 min	0.5%
ORD–DCA	Chicago to Washington	569	62.9%	28.8 min	2.6%
ORD–DEN	Chicago to Denver	567	70.0%	16.6 min	0.4%
ORD–ATL	Chicago to Atlanta	565	63.2%	25.8 min	1.6%
ORD–MSP	Chicago to Minneapolis	541	69.7%	15.4 min	0.6%
ORD–DTW	Chicago to Detroit	528	71.2%	17.9 min	0.9%
ORD–SFO	Chicago to San Francisco	510	76.5%	4.7 min	1.6%
ORD–IAH	Chicago to Houston	507	64.3%	21.1 min	1.0%

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), June 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jun 2025	Minutes
Air carrier	35.8%	31.6%	250,842
Late-arriving aircraft	39.5%	40.6%	277,338
National Aviation System	19.0%	20.9%	133,601
Extreme weather	5.6%	6.9%	39,153
Security	0.1%	0.2%	416

701,350 delay minutes on 9,046 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 ORD on time in June 2025?

70.2% of 29,641 scheduled domestic departures left less than 15 minutes late, and 68.2% reached their destination on time. The national figures that month were 71.4% and 70.3%.

How does that compare with a year earlier?

In June 2024, 69.8% of 24,207 departures left on time and 1.4% were cancelled, against 70.2% and 0.9% in June 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for June 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for ORD · methodology · corrections.