MIA to ORD flight delays
MIA ORD Miami to Chicago O'Hare · 1,197 miles
13,297 flights were scheduled from MIA to ORD over July 2023 through June 2026. Of the 13,052 that made the trip, 74.6% 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
- 13,297
- Arrived on time
- 74.6%
- 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 MIA–ORD, 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 | 75.4% | 70 min | 1.2% | 8,788 |
| United Airlines | 73.9% | 77 min | 1.1% | 2,995 |
| Spirit Airlines | 71.1% | 70 min | 2.1% | 1,468 |
Month by month
July was the month to avoid on MIA–ORD: 63.5% of flights arrived on time, against 84.9% in November. Each bar pools three years of that calendar month.
| Month | Share flights that arrived on time | Flights |
|---|---|---|
| January | 75.7% | 1,248 |
| February | 77.7% | 1,145 |
| March | 69.8% | 1,353 |
| April | 78.2% | 1,166 |
| May | 71.1% | 1,092 |
| June | 69.1% | 995 |
| July | 63.5% | 1,003 |
| August | 66.1% | 1,010 |
| September | 76.5% | 961 |
| October | 84.1% | 1,025 |
| November | 84.9% | 1,074 |
| December | 77.2% | 1,225 |
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.
MIA to ORD in one number
MIA → ORD
When a flight on this route was late, it was late by about 72 min.
Questions about MIA to ORD
- Which airline is most reliable from MIA to ORD?
- American Airlines — its flights on this pairing arrived on time 75.4% of the time, with 8,788 scheduled. Spirit Airlines came in at 71.1% over 1,468 scheduled. Airlines with fewer than 100 flights on the route are not rated.
- What is the worst month to fly MIA to ORD?
- July, at 63.5% of arrivals on time, with 1,003 flights scheduled. November was the best of the year at 84.9%.
- How late are MIA–ORD flights when they are late?
- 72 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 MIA to ORD 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 ORD 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.