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Route Reliability

Chicago → Miami

ORD–MIA · 1,197 miles · Chicago O'Hare International Airport to Miami International Airport

75
Usually Fine
WanderNerd Reliability Score
75%
Arrive within 15 minutes
9 min
Average arrival delay
1.9%
Cancelled
4,454
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.American Airlines77%3,019 flights
  2. 2.United Airlines75%1,011 flights
  3. 3.Spirit Airlines64%378 flights

Not enough history to rank: Frontier Airlines (46 flights). We rank airlines only after 100 flights on the route.

What the data says

Morning-you made the right choice.

ORD–MIA flights departing between 3–6 AM arrived on time 94% of the time, versus 59% between 6–9 PM.

Sunday scaries are real for this one.

ORD–MIA flights arrived on time 82% of the time on Tuesdays and just 66% on Sundays. That gap is worth planning around.

American Airlines runs this route best.

American Airlines arrived on time 77% of the time on this route; Spirit Airlines managed 64%.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon75%(622 flights)
  • Tue82%(603 flights)
  • Wed80%(590 flights)
  • Thu78%(630 flights)
  • Fri75%(636 flights)
  • Sat73%(630 flights)
  • Sun66%(646 flights)
On-time by departure window
  • 12–3 AM—(3 flights)
  • 3–6 AM94%(360 flights)
  • 6–9 AM85%(1377 flights)
  • 9 AM–12 PM73%(914 flights)
  • 12–3 PM74%(551 flights)
  • 3–6 PM62%(641 flights)
  • 6–9 PM59%(510 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
79%
May

Jun 77% → May 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%328
July 202571%327
August 202577%327
September 202583%313
October 202584%329
November 202579%335
December 202570%381
January 202670%394
February 202680%407
March 202666%472
April 202674%395
May 202679%349

Same trip, other airports

Keep nerding

Based on 4,454 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.