ORD to MIA flight delays
ORD MIA Chicago O'Hare to Miami · 1,197 miles
13,306 flights were scheduled from ORD to MIA over July 2023 through June 2026. Of the 13,079 that made the trip, 76.3% reached the gate less than 15 minutes behind schedule. These are arrival figures: “on time” means the flight reached the gate less than 15 minutes behind schedule. Arrivals are what decide whether you make the connection, so route and airline pages are scored on them rather than on pushback.
Data through June 2026 · Bureau of Transportation Statistics
The route in brief
- Flights in the window
- 13,306
- Arrived on time
- 76.3%
- Cancelled
- 1.3%
- Scheduled distance
- 1,197 miles
Cancellations are counted against everything scheduled. Diverted flights are counted with them rather than as very late arrivals, which is why the on-time share and the cancellation rate do not add up to everything that happened.
Airline by airline
Airlines with at least 100 flights on ORD–MIA, busiest first. Same route, same weather, same air traffic — which makes this the fairest comparison on the site.
| Airline | Arrived on time | Typical delay | Cancelled | Flights |
|---|---|---|---|---|
| American Airlines | 76.5% | 67 min | 1.2% | 8,788 |
| United Airlines | 78.3% | 64 min | 0.9% | 2,998 |
| Spirit Airlines | 71.1% | 71 min | 2.7% | 1,474 |
Month by month
July was the month to avoid on ORD–MIA: 67.8% of flights arrived on time, against 86.8% in October. Each bar pools three years of that calendar month.
| Month | Share flights that arrived on time | Flights |
|---|---|---|
| January | 70.1% | 1,244 |
| February | 79.8% | 1,144 |
| March | 70.9% | 1,350 |
| April | 79.4% | 1,163 |
| May | 75% | 1,090 |
| June | 72.7% | 993 |
| July | 67.8% | 1,008 |
| August | 71.3% | 1,009 |
| September | 84.2% | 959 |
| October | 86.8% | 1,037 |
| November | 86.1% | 1,076 |
| December | 73% | 1,233 |
Both ends of the route
A route’s record is built out of two airports’ habits. The hour-by-hour grid for each is on its own page.
ORD to MIA in one number
ORD → MIA
When a flight on this route was late, it was late by about 67 min.
Questions about ORD to MIA
- Which airline is most reliable from ORD to MIA?
- United Airlines — its flights on this pairing arrived on time 78.3% of the time, with 2,998 scheduled. Spirit Airlines came in at 71.1% over 1,474 scheduled. Airlines with fewer than 100 flights on the route are not rated.
- What is the worst month to fly ORD to MIA?
- July, at 67.8% of arrivals on time, with 1,008 flights scheduled. October was the best of the year at 86.8%.
- How late are ORD–MIA flights when they are late?
- 67 min on average, counting only the flights that arrived 15 minutes or more behind schedule. The on-time flights are left out of that average on purpose — mixing them in would flatter it.
- How often is the ORD to MIA flight cancelled?
- 1.3% of scheduled flights on this route were cancelled, July 2023 through June 2026. Diverted flights are counted with the cancellations rather than as late arrivals.
- Are these departure or arrival numbers?
- Arrival. A flight counts as on time here if it reached the gate at MIA less than 15 minutes behind schedule. Airport pages score departures instead, because that is the number you can act on when you pick a booking time.