Chicago Midway International in June 2025

66.3%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 June 2025, reporting carriers scheduled 7,187 domestic departures from Chicago Midway International (MDW). 66.3% left less than 15 minutes late and 69.3% reached their destination on time; 0.6% were cancelled.

Nationally that month, 71.4% of flights departed on time and 70.3% arrived on time, so MDW departures were 5.1 points below the national departure figure.

A year earlier, in June 2024, the airport had 7,537 departures with 66.0% leaving on time: a change of +0.3 points, with flights down 5%.

Flights arriving at MDW that month were on time 75.4% of the time (7,184 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 46%, air carrier 36% and national aviation system 17%.

On time 69.3%
Arrived 15+ minutes late 29.6%
Cancelled 0.6%
Diverted 0.4%

Every scheduled departure from MDW 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	MDW, 12 months to Jul 2026	All reported flights, Jun 2025
Departed on time	66.3%	66.0%	70.7%	71.4%
Arrived on time	69.3%	68.5%	73.9%	70.3%
Cancelled	0.6%	0.4%	1.5%	1.6%
Average departure delay (late minutes only)	20.6 min	21.3 min	16.5 min	22.1 min
Scheduled departures a day	240	251	202	20,386
Scheduled departures	7,187	7,537	73,744	611,575

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	6,670	93%	69.1%	13.3 min	0.5%
F9 Frontier Airlines	171	2%	63.2%	19.8 min	1.8%
OO SkyWest Airlines	152	2%	79.6%	4.6 min	0.0%
DL Delta Air Lines	136	2%	72.8%	9.2 min	5.1%
G4 Allegiant Air	58	1%	77.6%	20.4 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MDW–ATL	Chicago to Atlanta	318	69.8%	11.9 min	2.8%
MDW–DEN	Chicago to Denver	277	65.0%	17.3 min	0.7%
MDW–LAS	Chicago to Las Vegas	257	77.0%	3.6 min	1.2%
MDW–MCO	Chicago to Orlando	249	69.5%	14.6 min	0.8%
MDW–MSP	Chicago to Minneapolis	242	76.9%	8.1 min	0.0%
MDW–PHX	Chicago to Phoenix	241	71.4%	7.7 min	2.9%
MDW–DAL	Chicago to Dallas	197	62.9%	15.8 min	0.5%
MDW–LGA	Chicago to New York	196	58.2%	22.3 min	2.6%
MDW–MCI	Chicago to Kansas City	195	72.8%	10.3 min	1.5%
MDW–BWI	Chicago to Baltimore	178	70.2%	12.7 min	0.6%
MDW–HOU	Chicago to Houston	178	64.6%	13.6 min	0.6%
MDW–DCA	Chicago to Washington	176	65.9%	17.4 min	1.7%

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	35.6%	31.6%	44,219
Late-arriving aircraft	45.8%	40.6%	56,963
National Aviation System	16.5%	20.9%	20,467
Extreme weather	1.8%	6.9%	2,224
Security	0.3%	0.2%	390

124,263 delay minutes on 2,127 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 June 2025?

66.3% of 7,187 scheduled domestic departures left less than 15 minutes late, and 69.3% 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, 66.0% of 7,537 departures left on time and 0.4% were cancelled, against 66.3% and 0.6% 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 MDW · methodology · corrections.