Chicago Midway International in December 2023

76.2%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 December 2023, reporting carriers scheduled 6,836 domestic departures from Chicago Midway International (MDW). 76.2% left less than 15 minutes late and 80.0% reached their destination on time; 2.8% were cancelled.

Nationally that month, 83.1% of flights departed on time and 83.8% arrived on time, so MDW departures were 6.9 points below the national departure figure.

Flights arriving at MDW that month were on time 80.6% of the time (6,837 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 53%, air carrier 29% and national aviation system 14%.

On time 80.0%
Arrived 15+ minutes late 17.1%
Cancelled 2.8%
Diverted 0.1%

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

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

Measure	Dec 2023	Year earlier	MDW, 12 months to Jul 2026	All reported flights, Dec 2023
Departed on time	76.2%	—	70.7%	83.1%
Arrived on time	80.0%	—	73.9%	83.8%
Cancelled	2.8%	—	1.5%	0.4%
Average departure delay (late minutes only)	15.0 min	—	16.5 min	11.6 min
Scheduled departures a day	228	—	202	19,013
Scheduled departures	6,836	—	73,744	570,394

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	6,207	91%	80.0%	2.8 min	2.9%
F9 Frontier Airlines	339	5%	74.0%	18.8 min	1.8%
OO SkyWest Airlines	144	2%	87.5%	4.2 min	0.0%
DL Delta Air Lines	115	2%	90.4%	-8.3 min	0.9%
G4 Allegiant Air	31	0%	83.9%	61.3 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MDW–ATL	Chicago to Atlanta	298	82.2%	0.6 min	2.0%
MDW–DEN	Chicago to Denver	296	88.9%	-7.6 min	3.0%
MDW–MCO	Chicago to Orlando	286	73.4%	10.7 min	2.1%
MDW–LAS	Chicago to Las Vegas	284	87.3%	-0.9 min	3.2%
MDW–MSP	Chicago to Minneapolis	274	86.9%	-3.8 min	2.9%
MDW–PHX	Chicago to Phoenix	264	85.2%	-8.7 min	3.4%
MDW–LGA	Chicago to New York	226	75.7%	8.0 min	1.3%
MDW–DAL	Chicago to Dallas	208	86.5%	0.3 min	2.4%
MDW–MCI	Chicago to Kansas City	200	80.0%	7.1 min	2.5%
MDW–BNA	Chicago to Nashville	182	80.2%	2.3 min	4.4%
MDW–DCA	Chicago to Washington	180	77.8%	3.5 min	3.3%
MDW–STL	Chicago to St. Louis	178	87.6%	2.6 min	3.4%

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), December 2023.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2023	Minutes
Air carrier	28.9%	37.1%	22,505
Late-arriving aircraft	53.2%	38.8%	41,401
National Aviation System	13.9%	17.6%	10,848
Extreme weather	3.8%	6.2%	2,965
Security	0.1%	0.3%	66

77,785 delay minutes on 1,169 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 December 2023?

76.2% of 6,836 scheduled domestic departures left less than 15 minutes late, and 80.0% reached their destination on time. The national figures that month were 83.1% and 83.8%.

How does that compare with a year earlier?

December 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 December 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.