Atlanta (ATL) to Chicago (MDW) flights

Southwest Airlines, Delta Air Lines, Frontier Airlines fly nonstop from Hartsfield Jackson Atlanta International Airport to Chicago Midway International Airport, with about 70 flights a week in July 2026. The 591-mile flight takes about 1h 52m gate to gate.

From

ATL

Atlanta

Hartsfield Jackson Atlanta International Airport

MDW

Chicago

Chicago Midway International Airport

Distance: 591 mi · 951 km
Flight time: 1h 52m
Airlines: 3
Seats filled: 79%

Flights a week, July 2026

3,436 flights and 423,322 passengers in 12 months

Map data: Natural Earth. Lines follow the shortest (great-circle) path.

Airlines flying ATL to MDW

Airline	Flights a week	Aircraft	Passengers (12 months)	Flight time
Southwest Airlines	32	Boeing 737 MAX 8, Boeing 737-700 / MAX 7, Boeing 737-800	183,010	1h 49m
Delta Air Lines	25	Boeing 717-200, Airbus A320-100/200, Airbus A319	147,803	1h 52m
Frontier Airlines	13	Airbus A320neo, Airbus A321, Airbus A320-100/200	92,509	1h 58m

Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.

ATL to MDW flight schedule

16 flight numbers flew this route in August 2026, 8 of them almost daily. The first usually leaves at 7:55am and the last at 9:36pm. Times are local and can change; check with the airline before you book.

Flight	Departs	Arrives	Days flown in August 2026	On time (12 months)
WN 232Southwest Airlines	7:55am	8:45am	18	59%
WN 298Southwest Airlines	8:00am	8:50am	12	58%
F9 2779Frontier Airlines	8:50am	9:51am	31	65%
DL 1063Delta Air Lines	9:03am	9:59am	31	86%
WN 1325Southwest Airlines	10:10am	11:05am	12	82%
DL 2417Delta Air Lines	11:00am	11:51am	30	87%
WN 1332Southwest Airlines	11:10am	12:05pm	8	n/a
WN 2566Southwest Airlines	2:40pm	3:30pm	12	33%
DL 1728Delta Air Lines	3:15pm	4:15pm	26	75%
WN 433Southwest Airlines	4:10pm	5:05pm	4	n/a
WN 321Southwest Airlines	4:45pm	5:40pm	4	n/a
WN 1893Southwest Airlines	4:55pm	5:50pm	24	50%
WN 236Southwest Airlines	6:30pm	7:25pm	12	57%
WN 2070Southwest Airlines	6:35pm	7:30pm	20	55%
F9 2291Frontier Airlines	8:59pm	10:03pm	31	65%
DL 1076Delta Air Lines	9:36pm	10:36pm	31	77%

Is ATL to MDW on time?

From September 2025 to August 2026, 75% of 3,537 flights arrived within 15 minutes of schedule and 2% were cancelled. Flights leaving around 11am were the most punctual (85%), those around 9pm the least (64%). Most delay time was caused by late-arriving aircraft (42%).

Airline	Flights	On time	Average delay	Cancelled
Southwest Airlines	1,538	74%	17 min	1.6%
Delta Air Lines	1,359	82%	11 min	2.4%
Frontier Airlines	640	65%	32 min	2.5%

Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.

On-time arrivals by departure time

Scheduled departure	Flights	On time
6am to 7am	156	96%
7am to 8am	82	80%
8am to 9am	377	83%
9am to 10am	168	82%
10am to 11am	219	80%
11am to 12pm	400	85%
12pm to 1pm	135	84%
1pm to 2pm	78	86%
2pm to 3pm	104	68%
3pm to 4pm	347	78%
4pm to 5pm	206	72%
5pm to 6pm	169	68%
6pm to 7pm	194	67%
7pm to 8pm	163	50%
8pm to 9pm	134	60%
9pm to 10pm	500	64%
10pm to 11pm	105	79%

Flights by month

Month	Flights	Passengers
August 2025	301	38,406
September 2025	293	37,393
October 2025	304	38,123
November 2025	272	32,102
December 2025	280	32,996
January 2026	268	27,703
February 2026	258	27,322
March 2026	272	31,376
April 2026	284	34,540
May 2026	295	40,405
June 2026	300	41,343
July 2026	309	41,613

Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.