Chicago Midway International in March 2025

78.3%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 March 2025, reporting carriers scheduled 6,106 domestic departures from Chicago Midway International (MDW). 78.3% left less than 15 minutes late and 80.6% reached their destination on time; 0.9% were cancelled.

Nationally that month, 79.9% of flights departed on time and 79.3% arrived on time, so MDW departures were 1.6 points below the national departure figure.

A year earlier, in March 2024, the airport had 6,684 departures with 75.3% leaving on time: a change of +3.0 points, with flights down 9%.

Flights arriving at MDW that month were on time 82.0% of the time (6,105 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 44%, air carrier 31% and national aviation system 20%.

On time 80.6%
Arrived 15+ minutes late 18.1%
Cancelled 0.9%
Diverted 0.3%

Every scheduled departure from MDW in March 2025, judged by arrival at the destination.

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

Measure	Mar 2025	Mar 2024	MDW, 12 months to Jul 2026	All reported flights, Mar 2025
Departed on time	78.3%	75.3%	70.7%	79.9%
Arrived on time	80.6%	78.2%	73.9%	79.3%
Cancelled	0.9%	0.7%	1.5%	1.2%
Average departure delay (late minutes only)	13.7 min	14.2 min	16.5 min	14.9 min
Scheduled departures a day	204	223	202	20,029
Scheduled departures	6,106	6,684	73,744	600,872

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	5,532	91%	80.9%	2.0 min	0.9%
F9 Frontier Airlines	241	4%	74.3%	7.0 min	3.3%
OO SkyWest Airlines	176	3%	77.3%	7.2 min	0.6%
DL Delta Air Lines	119	2%	84.9%	8.4 min	0.0%
G4 Allegiant Air	38	1%	81.6%	4.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MDW–ATL	Chicago to Atlanta	305	81.3%	2.1 min	1.0%
MDW–PHX	Chicago to Phoenix	285	78.9%	0.0 min	1.1%
MDW–MCO	Chicago to Orlando	271	77.9%	1.0 min	1.8%
MDW–LAS	Chicago to Las Vegas	235	79.6%	3.9 min	1.3%
MDW–MSP	Chicago to Minneapolis	228	84.6%	1.8 min	0.4%
MDW–DEN	Chicago to Denver	217	82.9%	3.2 min	0.5%
MDW–TPA	Chicago to Tampa	200	79.0%	4.4 min	1.0%
MDW–LGA	Chicago to New York	194	73.7%	10.1 min	1.0%
MDW–DAL	Chicago to Dallas	181	82.3%	-1.3 min	1.7%
MDW–DCA	Chicago to Washington	180	76.7%	5.8 min	0.6%
MDW–DTW	Chicago to Detroit	176	78.4%	8.0 min	1.1%
MDW–MCI	Chicago to Kansas City	171	81.3%	2.7 min	1.2%

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), March 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Mar 2025	Minutes
Air carrier	31.1%	33.0%	21,727
Late-arriving aircraft	43.5%	39.2%	30,441
National Aviation System	20.1%	21.9%	14,090
Extreme weather	4.9%	5.9%	3,423
Security	0.4%	0.1%	247

69,928 delay minutes on 1,108 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 March 2025?

78.3% of 6,106 scheduled domestic departures left less than 15 minutes late, and 80.6% reached their destination on time. The national figures that month were 79.9% and 79.3%.

How does that compare with a year earlier?

In March 2024, 75.3% of 6,684 departures left on time and 0.7% were cancelled, against 78.3% and 0.9% in March 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for March 2025; 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.