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Flight Reliability

F9 4473 · Frontier Airlines

Atlanta → St. Louis (ATL–STL)

72
Usually Fine
WanderNerd Reliability Score
70%
Arrive within 15 minutes
10 min
Average arrival delay
1.6%
Cancelled
5 min early
Median arrival delay

Based on 184 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

F9 4473 departing between 6–9 AM arrived on time 81% of the time, versus 44% between 3–6 PM.

Tuesdays have been rough.

F9 4473 arrived on time 81% of the time on Saturdays and just 40% on Tuesdays. That gap is worth planning around.

Lagging the ATL–STL route.

F9 4473 arrived on time 70% of the time, versus 82% across the ATL–STL route.

Slipping a little lately.

F9 4473 arrived on time 66% of the time over the last three months in the data, compared with 71% in the three months before that.

The breakdown

On-time by weekday
  • Mon68%(25 flights)
  • Tue40%(10 flights)
  • Wed77%(17 flights)
  • Thu74%(39 flights)
  • Fri74%(27 flights)
  • Sat81%(26 flights)
  • Sun62%(37 flights)
On-time by departure window
  • 6–9 AM81%(67 flights)
  • 9 AM–12 PM69%(35 flights)
  • 12–3 PM67%(63 flights)
  • 3–6 PM44%(16 flights)
On-time trend by month
73%
May

Jul 85% → May 73% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
July 202585%13
August 202554%13
September 202577%13
October 202571%14
November 202567%12
December 202562%13
January 202669%16
February 202681%16
March 202657%14
April 202667%18
May 202673%30
Departures on time
71%
Diverted
0%
Flights flown
181
Months covered
12

Same route, other flights

Keep nerding

Based on 184 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.