Chicago Midway International in August 2023

68.9%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 August 2023, reporting carriers scheduled 7,890 domestic departures from Chicago Midway International (MDW). 68.9% left less than 15 minutes late and 71.2% reached their destination on time; 1.2% were cancelled.

Nationally that month, 76.7% of flights departed on time and 76.9% arrived on time, so MDW departures were 7.8 points below the national departure figure.

Flights arriving at MDW that month were on time 76.0% of the time (7,893 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 46%, air carrier 32% and national aviation system 18%.

On time 71.2%
Arrived 15+ minutes late 27.2%
Cancelled 1.2%
Diverted 0.4%

Every scheduled departure from MDW in August 2023, judged by arrival at the destination.

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

Measure	Aug 2023	Year earlier	MDW, 12 months to Jul 2026	All reported flights, Aug 2023
Departed on time	68.9%	—	70.7%	76.7%
Arrived on time	71.2%	—	73.9%	76.9%
Cancelled	1.2%	—	1.5%	1.5%
Average departure delay (late minutes only)	16.4 min	—	16.5 min	17.3 min
Scheduled departures a day	263	—	202	20,100
Scheduled departures	7,890	—	73,744	602,987

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	7,157	91%	71.2%	9.7 min	1.0%
F9 Frontier Airlines	393	5%	64.1%	23.4 min	3.8%
OO SkyWest Airlines	178	2%	81.5%	8.9 min	1.1%
DL Delta Air Lines	120	2%	76.7%	6.2 min	3.3%
G4 Allegiant Air	42	1%	71.4%	9.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MDW–DEN	Chicago to Denver	367	69.8%	12.3 min	0.8%
MDW–ATL	Chicago to Atlanta	339	74.0%	13.1 min	1.2%
MDW–MSP	Chicago to Minneapolis	327	78.6%	5.9 min	0.3%
MDW–PHX	Chicago to Phoenix	305	65.6%	10.3 min	1.0%
MDW–LAS	Chicago to Las Vegas	295	64.1%	11.4 min	1.4%
MDW–MCO	Chicago to Orlando	231	70.1%	9.6 min	2.6%
MDW–LGA	Chicago to New York	230	71.7%	5.2 min	1.7%
MDW–DTW	Chicago to Detroit	226	69.5%	14.5 min	2.2%
MDW–MCI	Chicago to Kansas City	217	69.6%	9.3 min	0.5%
MDW–DAL	Chicago to Dallas	211	78.7%	4.3 min	0.0%
MDW–STL	Chicago to St. Louis	209	73.2%	13.1 min	0.0%
MDW–BNA	Chicago to Nashville	188	83.0%	0.7 min	0.0%

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), August 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2023	Minutes
Air carrier	32.4%	36.7%	34,913
Late-arriving aircraft	45.5%	42.2%	49,118
National Aviation System	18.0%	15.7%	19,474
Extreme weather	4.0%	5.1%	4,360
Security	0.0%	0.2%	45

107,910 delay minutes on 2,147 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 MDW on time in August 2023?

68.9% of 7,890 scheduled domestic departures left less than 15 minutes late, and 71.2% reached their destination on time. The national figures that month were 76.7% and 76.9%.

How does that compare with a year earlier?

August 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 August 2023; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for MDW · methodology · corrections.