MIA to MDW flight delays & on-time performance
Nonstop flights from Miami International Airport to Chicago Midway International Airport · 1,182 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at MIA or MDW right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Miami (MIA) to Chicago (MDW) arrived on time 68% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.6% were cancelled, and 11% arrived an hour or more late.
- Frontier Airlines was the most punctual airline here (78% on time); Southwest Airlines was the least (67%).
- Departures scheduled around 7am did best (100% on time); around 3pm did worst (33%).
- Monday was the most reliable day to fly (78% on time) and Saturday the least (58%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (40%).
Which airline is most on time from MIA to MDW?
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 |
|---|---|---|---|---|---|
| Frontier Airlines | 78% | 1.6% | 16 min | 12.7% | 64 |
| Southwest Airlines | 67% | 1.6% | 23 min | 10.3% | 439 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am82%122 flights
- 7am100%16 flights
- 11am78%51 flights
- 12pm67%51 flights
- 1pm65%26 flights
- 2pm77%66 flights
- 3pm33%18 flights
- 4pm51%63 flights
- 5pm20%10 flights
- 6pm53%53 flights
- 7pm50%12 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday78%1.3% cancelled
- Tuesday69%2.5% cancelled
- Wednesday68%0.0% cancelled
- Thursday75%1.3% cancelled
- Friday73%1.3% cancelled
- Saturday58%3.8% cancelled
- Sunday62%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)40%
- Late-arriving aircraft31%
- Air traffic control & airport congestion27%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather75%
- Air traffic control & airport congestion25%
- Airline (crew, maintenance, cleaning, fueling)0%
- Security0%
MIA to MDW: common questions
- How often are MIA to MDW flights on time?
- 68% 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 Miami to Chicago cancelled?
- 1.6% of scheduled flights were cancelled (8 of 503).
- How long are typical delays?
- Across all flights the average arrival delay was 22 min (early arrivals count as zero). Flights that were late arrived 66 min behind schedule on average, and 10.6% of flights were an hour or more late.
- How long is taxi time at MIA?
- Flights on this route spent 20 min taxiing from the gate to takeoff on average.
Related routes
Return trip: MDW to MIA — 73% on time
More flights from Miami
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: MIA → MDW, nonstop flights by US airlines that report to the DOT. How we calculate this.