MDW · Chicago Midway International Airport

Share of flights 15+ min late, by month

departures arrivals usual for the month (departures) Jan 2015 → Jul 2026; gridlines 10/20/30/40%

Month	Flights	Late 15+	vs usual	Cancelled	Avg min	Main cause
Jul 2026	7,279	41.2%	-2.9	2.3%	25	Late aircraft
Jun 2026	6,937	39.6%	+4.4	1.5%	24	Late aircraft
May 2026	6,269	31.5%	+7.4	0.4%	17	Late aircraft
Apr 2026	6,282	22.7%	+0.7	1.2%	13	Late aircraft
Mar 2026	6,508	37.6%	+13.4	3.9%	24	Late aircraft
Feb 2026	4,537	21.2%	+2.8	0.9%	11	Late aircraft
Jan 2026	4,848	18.5%	-7.4	2.1%	10	Airline
Dec 2025	5,738	31.9%	+3.0	0.5%	19	Late aircraft
Nov 2025	5,620	20.6%	+0.4	5.0%	13	Late aircraft
Oct 2025	6,536	22.0%	-1.1	0.2%	11	Late aircraft
Sep 2025	6,459	18.1%	-5.2	0.1%	10	Airline
Aug 2025	6,731	26.1%	-4.2	0.7%	16	Late aircraft
Jul 2025	7,531	36.5%	-7.6	1.8%	26	Late aircraft
Jun 2025	7,187	33.2%	-2.0	0.6%	21	Late aircraft
May 2025	6,128	23.8%	-6.3	0.3%	15	Late aircraft
Apr 2025	6,051	18.1%	-9.5	0.5%	11	Late aircraft
Mar 2025	6,106	20.9%	-5.3	0.9%	14	Late aircraft
Feb 2025	4,741	16.6%	-2.1	0.7%	11	Late aircraft
Jan 2025	5,189	18.6%	-8.0	2.0%	10	Airline
Dec 2024	5,949	24.6%	-5.7	0.5%	14	Late aircraft
Nov 2024	5,901	14.8%	-11.7	0.3%	10	Late aircraft
Oct 2024	6,744	15.1%	-8.1	0.9%	8	Airline
Sep 2024	6,849	16.7%	-6.6	0.3%	9	Airline
Aug 2024	7,199	25.9%	-7.6	0.8%	15	Late aircraft

Airline	Flights	Late	Canc.
Frontier	106	17.1%	0.9%
Delta	118	17.9%	0.8%
Southwest	5,999	32.1%	0.3%

Airlines with 30+ departures that month.

Date	Flights	Late	Canc.
2022-12-23	231	100%	74%
2023-12-24	223	95%	51%
2020-03-19	241	12%	97%
2022-12-24	181	92%	50%
2022-12-25	215	92%	49%
2022-01-02	188	93%	24%
2015-02-01	169	40%	91%
2022-12-26	232	83%	68%
2022-12-27	230	86%	52%
2022-07-23	192	91%	21%
2022-04-02	171	88%	20%
2018-11-26	261	88%	16%

Departures; ranked by share late or cancelled.

None recorded.