ATL to ORD flight delays & on-time performance
Nonstop flights from Hartsfield Jackson Atlanta International Airport to Chicago O'Hare International Airport · 606 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ATL or ORD right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Atlanta (ATL) to Chicago (ORD) arrived on time 71% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 2.4% were cancelled, and 11% arrived an hour or more late.
- United Airlines was the most punctual airline here (75% on time); Frontier Airlines was the least (64%).
- Departures scheduled around 6am did best (87% on time); around 5pm did worst (47%).
- Wednesday was the most reliable day to fly (76% on time) and Monday the least (67%).
- The largest source of delay minutes was air traffic control & airport congestion (38%).
Which airline is most on time from ATL to ORD?
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 |
|---|---|---|---|---|---|
| PSA AirlinesRegional airline operating American Eagle flights. | 100% | 0.0% | 0 min | 0.0% | 5 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 84% | 5.0% | 15 min | 7.9% | 40 |
| Spirit Airlines | 80% | 0.0% | 7 min | 0.0% | 45 |
| United Airlines | 75% | 1.6% | 24 min | 10.0% | 1,668 |
| American Airlines | 72% | 2.4% | 30 min | 12.2% | 672 |
| Envoy AirRegional airline operating American Eagle flights. | 71% | 2.2% | 25 min | 12.4% | 363 |
| Delta Air Lines | 69% | 2.3% | 21 min | 8.7% | 2,630 |
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 69% | 6.2% | 25 min | 12.0% | 305 |
| Frontier Airlines | 64% | 3.1% | 40 min | 18.9% | 712 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am87%237 flights
- 7am86%556 flights
- 8am79%282 flights
- 9am80%443 flights
- 10am79%419 flights
- 11am84%548 flights
- 12pm72%260 flights
- 1pm81%406 flights
- 2pm70%73 flights
- 3pm66%859 flights
- 4pm63%160 flights
- 5pm47%461 flights
- 6pm57%390 flights
- 7pm58%480 flights
- 8pm53%303 flights
- 9pm66%169 flights
- 10pm68%358 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday67%3.4% cancelled
- Tuesday72%1.7% cancelled
- Wednesday76%1.2% cancelled
- Thursday72%1.3% cancelled
- Friday69%2.3% cancelled
- Saturday73%2.6% cancelled
- Sunday68%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.
- Air traffic control & airport congestion38%
- Late-arriving aircraft29%
- Airline (crew, maintenance, cleaning, fueling)26%
- Extreme weather6%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather51%
- Airline (crew, maintenance, cleaning, fueling)34%
- Air traffic control & airport congestion16%
- Security0%
ATL to ORD: common questions
- How often are ATL to ORD flights on time?
- 71% 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 Atlanta to Chicago cancelled?
- 2.4% of scheduled flights were cancelled (154 of 6,440).
- How long are typical delays?
- Across all flights the average arrival delay was 25 min (early arrivals count as zero). Flights that were late arrived 81 min behind schedule on average, and 10.8% of flights were an hour or more late.
- How long is taxi time at ATL?
- Flights on this route spent 20 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ORD to ATL — 75% on time
More flights from Atlanta
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ATL → ORD, nonstop flights by US airlines that report to the DOT. How we calculate this.