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Flight Reliability

F9 2291 · Frontier Airlines

Atlanta → Chicago (ATL–MDW)

73
Usually Fine
WanderNerd Reliability Score
73%
Arrive within 15 minutes
17 min
Average arrival delay
0.8%
Cancelled
4 min early
Median arrival delay

Based on 262 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

F9 2291 departing between 6–9 AM arrived on time 78% of the time, versus 36% between 9 PM–12 AM.

Saturdays have been rough.

F9 2291 arrived on time 84% of the time on Thursdays and just 58% on Saturdays. That gap is worth planning around.

A bit behind the ATL–MDW route.

F9 2291 arrived on time 73% of the time, versus 77% across the ATL–MDW route.

Slipping a little lately.

F9 2291 arrived on time 71% of the time over the last three months in the data, compared with 75% in the three months before that.

The breakdown

On-time by weekday
  • Mon71%(31 flights)
  • Tue67%(45 flights)
  • Wed83%(42 flights)
  • Thu84%(43 flights)
  • Fri74%(34 flights)
  • Sat58%(19 flights)
  • Sun67%(45 flights)
On-time by departure window
  • 6–9 AM78%(18 flights)
  • 9 AM–12 PM74%(74 flights)
  • 12–3 PM70%(37 flights)
  • 3–6 PM74%(54 flights)
  • 6–9 PM77%(65 flights)
  • 9 PM–12 AM36%(11 flights)
On-time trend by month
63%
May

Jun 56% → May 63% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202556%16
July 202568%19
August 202575%20
September 202589%26
October 202570%27
November 202568%25
January 202685%20
February 202672%25
March 202659%22
April 202690%29
May 202663%30
Departures on time
69%
Diverted
0.4%
Flights flown
259
Months covered
11

Same route, other flights

Keep nerding

Based on 262 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.