Route profile
MIA→MCI
Flight reliability, delays and best times to fly from Miami to Kansas City, 1,251 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 11% of comparable major US routes (4,598 compared)
Calculated from 1,879 flights. How this is calculated
MIA → MCI arrives on time 68.4% of the time; the return trip, MCI → MIA, arrives on time 83.3% of the time, a 14.9-point gap between the two directions of the same city pair.
MIA → MCI spends 29.4 minutes on the ground on a 1,251-mile trip: 22.2 minutes from pushback to wheels-up at MIA and 7.2 minutes from touchdown to gate at MCI.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What stands out
The airline matters unusually much on this route, a wider carrier-to-carrier gap than 91% of 2,692 comparable routes.
Envoy Air arrived on time 83.1% of the time, against 64.5% for Southwest Airlines, flying the exact same route.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Ranked against every other route with the same kind of figure and at least 2,692 in the comparison.
What sets this route apart
Where MIA to MCI differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
Monday is the day MIA to MCI slips furthest against routes of similar length, 63.7% on time where they average 76.2%, 12.5 points lower. Against all other routes the gap is 13.6 points.
In July, MIA to MCI runs 18.9 points below routes of similar length, 50.0% on time to 68.9%. Against all other routes the gap is 19.7 points.
American Airlines’ flights on MIA to MCI arrive on time 65.2% of the time, 9.5 points below the 74.7% it manages on its routes of similar length. Against all other routes the gap is 9.9 points.
MIA to MCI against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Weekday: Monday | 63.7% | routes of similar length | 76.2% | −12.5 pts | 267 here, 277,318 there |
| Month: July | 50.0% | routes of similar length | 68.9% | −18.9 pts | 206 here, 201,865 there |
| Airline: American Airlines | 65.2% | routes of similar length | 74.7% | −9.5 pts | 1,194 here, 411,344 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 1,251 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
When it goes wrong
July 2023 – July 2026
63 min late
against a median of 1 min early
MIA → MCI has an average that understates its risk: a typical arrival is 1 min early, but the worst tenth are 64 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 1,879 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at MCI after arriving from MIA.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 47% | Likely to miss |
| 45 min | 31% | Likely to miss |
| 60 min | 21% | High risk |
| 90 min | 11% | Some risk |
| 120 min | 6.1% | Some risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 1.49% of the time and diverts 0.53% of the time, which a late arrival never shows up in.
Chance of missing is the share of 1,841 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 63 minutes late (90th-percentile gate arrival delay), over 1,879 operations.
Any other layover length: connection checker.
Best time to fly
MIA → MCI flights departing 5–9 AM arrived on time 91.7% of the time, against 65.5% for 6–9 PM departures, a gap of 26.2 percentage points.
By departure window
By departure hour
- 12 AM to 7 AM: too few flights to score
- 8 AM: 91.7% on time from 123 flights
- 9 AM to 2 PM: too few flights to score
- 3 PM: 67.2% on time from 204 flights
- 4 PM to 6 PM: too few flights to score
- 7 PM: 67.5% on time from 165 flights
- 8 PM: 64.0% on time from 165 flights
- 9 PM: 66.5% on time from 880 flights
- 10 PM to 11 PM: too few flights to score
Departure windows with fewer than 120 flights are not scored.
Why MIA → MCI runs late
July 2023 – July 2026
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for MIA → MCI. Only delays of 15 minutes or more are attributed.
Late-arriving aircraft is the largest cause on MIA → MCI, at 43.0%: flights here mostly leave late because the plane came in late, and the day shows it: 5–9 AM departures arrived on time 91.7% of the time and 6–9 PM departures 65.5%.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| American Airlines | 1,222 | 65.2% | 1.72% | 0 min | 13.0% |
| Envoy Air | 339 | 83.1% | 1.47% | -9 min | 3.6% |
| Southwest Airlines | 309 | 64.5% | 0.65% | 4 min | 10.7% |
American Airlines flew 65.3% of the 1,870 flights listed. American Airlines cancelled 1.72% of its flights here against 0.65% for Southwest Airlines.
Envoy Air arrived on time 18.6 percentage points more often than Southwest Airlines on this route.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
| Flight | Scheduled | Operations | On time |
|---|---|---|---|
| AA670 American Airlines | 9:25 PM | 608 | 64.8% |
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Monday the least, a gap of 12.0 percentage points.
Reliability over time
July 2023 – July 2026
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 72.6% against 70.6% in the 12 months before — improving by 2.0 percentage points.
Data and methodology
Calculated by FlyerIntel from 1,879 MIA → MCI flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed