MDW to ATL flight delays & on-time performance
Nonstop flights from Chicago Midway International Airport to Hartsfield Jackson Atlanta International Airport · 591 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at MDW or ATL right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Chicago (MDW) to Atlanta (ATL) arrived on time 79% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 2.1% were cancelled, and 6% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (87% on time); Frontier Airlines was the least (71%).
- Departures scheduled around 9am did best (90% on time); around 6pm did worst (67%).
- Wednesday was the most reliable day to fly (85% on time) and Sunday the least (74%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (44%).
Which airline is most on time from MDW to ATL?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Delta Air Lines | 87% | 2.8% | 13 min | 5.4% | 1,362 |
| Southwest Airlines | 76% | 1.2% | 15 min | 6.8% | 1,544 |
| Frontier Airlines | 71% | 2.6% | 16 min | 7.0% | 621 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am81%699 flights
- 7am89%174 flights
- 8am87%183 flights
- 9am90%166 flights
- 10am89%321 flights
- 11am80%189 flights
- 12pm79%476 flights
- 1pm79%102 flights
- 2pm76%204 flights
- 3pm71%110 flights
- 4pm73%155 flights
- 5pm77%304 flights
- 6pm67%306 flights
- 7pm67%84 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday78%3.4% cancelled
- Tuesday84%0.8% cancelled
- Wednesday85%0.6% cancelled
- Thursday80%0.4% cancelled
- Friday77%1.8% cancelled
- Saturday78%3.6% cancelled
- Sunday74%4.2% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)44%
- Late-arriving aircraft30%
- Air traffic control & airport congestion22%
- Extreme weather3%
- Security1%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)49%
- Extreme weather48%
- Air traffic control & airport congestion3%
- Security0%
MDW to ATL: common questions
- How often are MDW to ATL flights on time?
- 79% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Chicago to Atlanta cancelled?
- 2.1% of scheduled flights were cancelled (73 of 3,527).
- How long are typical delays?
- Across all flights the average arrival delay was 14 min (early arrivals count as zero). Flights that were late arrived 64 min behind schedule on average, and 6.3% of flights were an hour or more late.
- How long is taxi time at MDW?
- Flights on this route spent 15 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ATL to MDW — 76% on time
More flights from Chicago
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: MDW → ATL, nonstop flights by US airlines that report to the DOT. How we calculate this.