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Flight Reliability

F9 4211 · Frontier Airlines

Atlanta → Austin (ATL–AUS)

52
A Little Dicey
WanderNerd Reliability Score
65%
Arrive within 15 minutes
21 min
Average arrival delay
4.0%
Cancelled
1 min
Median arrival delay

Based on 249 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

F9 4211 departing between 12–3 PM arrived on time 78% of the time, versus 59% between 3–6 PM.

Sunday scaries are real for this one.

F9 4211 arrived on time 91% of the time on Tuesdays and just 55% on Sundays. That gap is worth planning around.

Lagging the ATL–AUS route.

F9 4211 arrived on time 65% of the time, versus 79% across the ATL–AUS route.

Lagging the Frontier Airlines network.

F9 4211 arrived on time 65% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon56%(45 flights)
  • Tue91%(11 flights)
  • Wed73%(11 flights)
  • Thu79%(48 flights)
  • Fri65%(46 flights)
  • Sat62%(29 flights)
  • Sun55%(49 flights)
On-time by departure window
  • 9 AM–12 PM77%(17 flights)
  • 12–3 PM78%(58 flights)
  • 3–6 PM59%(161 flights)
  • 6–9 PM—(3 flights)
On-time trend by month
65%
May

Jun 44% → May 65% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202544%18
July 202553%19
August 202559%17
September 202553%17
October 202571%21
November 202561%18
December 202544%16
January 202681%16
February 202694%16
March 202669%29
April 202686%21
May 202665%31
Departures on time
66%
Diverted
0%
Flights flown
239
Months covered
12

Same route, other flights

Keep nerding

Based on 249 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.