Route Reliability
Atlanta → Chicago
ATL–MDW · 591 miles · Hartsfield–Jackson Atlanta International Airport to Chicago Midway International Airport
- 77%
- Arrive within 15 minutes
- 11 min
- Average arrival delay
- 1.9%
- Cancelled
- 3,535
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.Delta Air Lines81%1,406 flights
- 2.Southwest Airlines78%1,550 flights
- 3.Frontier Airlines65%579 flights
What the data says
Morning flights do better here.
ATL–MDW flights departing between 6–9 AM arrived on time 88% of the time, versus 64% between 9 PM–12 AM.
Monday is the weak spot.
ATL–MDW flights arrived on time 84% of the time on Wednesdays. On Mondays: 73%.
Delta Air Lines has a clear lead on this route.
Delta Air Lines arrived on time 81% of the time on this route; Frontier Airlines managed 65%.
Slipping a little lately.
ATL–MDW flights arrived on time 75% of the time over the last three months in the data, compared with 78% in the three months before that.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon73%(522 flights)
- Tue81%(487 flights)
- Wed84%(487 flights)
- Thu77%(525 flights)
- Fri76%(519 flights)
- Sat76%(382 flights)
- Sun73%(522 flights)
- 6–9 AM88%(708 flights)
- 9 AM–12 PM85%(602 flights)
- 12–3 PM77%(390 flights)
- 3–6 PM77%(704 flights)
- 6–9 PM66%(501 flights)
- 9 PM–12 AM64%(539 flights)
Jun 70% → May 67% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 70% | 307 |
| July 2025 | 67% | 316 |
| August 2025 | 76% | 301 |
| September 2025 | 90% | 292 |
| October 2025 | 81% | 304 |
| November 2025 | 82% | 270 |
| December 2025 | 73% | 280 |
| January 2026 | 83% | 268 |
| February 2026 | 79% | 258 |
| March 2026 | 73% | 270 |
| April 2026 | 85% | 283 |
| May 2026 | 67% | 295 |
Same trip, other airports
Keep nerding
Based on 3,535 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.