ORD to ATL flight delays & on-time performance
Nonstop flights from Chicago O'Hare International Airport to Hartsfield Jackson Atlanta International Airport · 606 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ORD 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 (ORD) to Atlanta (ATL) arrived on time 75% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 2.3% were cancelled, and 9% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (81% on time); American Airlines was the least (65%).
- Departures scheduled around 6am did best (86% on time); around 6pm did worst (59%).
- Wednesday was the most reliable day to fly (79% on time) and Sunday the least (72%).
- The largest source of delay minutes was late-arriving aircraft (47%).
Which airline is most on time from ORD 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 | 81% | 2.5% | 17 min | 7.2% | 2,628 |
| PSA AirlinesRegional airline operating American Eagle flights. | 80% | 0.0% | 12 min | 0.0% | 5 |
| Envoy AirRegional airline operating American Eagle flights. | 78% | 2.2% | 15 min | 9.0% | 365 |
| Spirit Airlines | 76% | 0.0% | 33 min | 8.9% | 45 |
| United Airlines | 75% | 1.3% | 18 min | 8.3% | 1,668 |
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 70% | 4.6% | 20 min | 11.1% | 305 |
| Frontier Airlines | 68% | 3.5% | 34 min | 12.4% | 715 |
| American Airlines | 65% | 2.4% | 32 min | 17.2% | 671 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 62% | 2.5% | 36 min | 17.9% | 40 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am84%516 flights
- 6am86%369 flights
- 7am85%653 flights
- 8am82%229 flights
- 9am85%589 flights
- 10am83%394 flights
- 11am80%544 flights
- 12pm69%88 flights
- 1pm74%524 flights
- 2pm73%473 flights
- 3pm68%217 flights
- 4pm65%394 flights
- 5pm68%252 flights
- 6pm59%733 flights
- 7pm64%259 flights
- 8pm62%206 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday72%4.1% cancelled
- Tuesday79%1.6% cancelled
- Wednesday79%0.9% cancelled
- Thursday77%1.2% cancelled
- Friday72%2.5% cancelled
- Saturday76%2.3% cancelled
- Sunday72%3.7% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft47%
- Airline (crew, maintenance, cleaning, fueling)27%
- Air traffic control & airport congestion20%
- Extreme weather6%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather50%
- Airline (crew, maintenance, cleaning, fueling)34%
- Air traffic control & airport congestion16%
- Security0%
ORD to ATL: common questions
- How often are ORD to ATL flights on time?
- 75% 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?
- 2.3% of scheduled flights were cancelled (150 of 6,442).
- How long are typical delays?
- Across all flights the average arrival delay was 21 min (early arrivals count as zero). Flights that were late arrived 81 min behind schedule on average, and 9.5% of flights were an hour or more late.
- How long is taxi time at ORD?
- Flights on this route spent 25 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ATL to ORD — 71% 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: ORD → ATL, nonstop flights by US airlines that report to the DOT. How we calculate this.