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Flight Reliability

F9 4937 · Frontier Airlines

Raleigh–Durham → Detroit (RDU–DTW)

91
Nerd Approved
WanderNerd Reliability Score
86%
Arrive within 15 minutes
2 min early
Average arrival delay
0.8%
Cancelled
11 min early
Median arrival delay

Based on 124 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

F9 4937 departing between 9 AM–12 PM arrived on time 92% of the time, versus 67% between 6–9 PM.

Sunday scaries are real for this one.

F9 4937 arrived on time 96% of the time on Fridays and just 76% on Sundays. That gap is worth planning around.

Better than the Frontier Airlines network average.

F9 4937 arrived on time 86% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon83%(23 flights)
  • Tue—(7 flights)
  • Wed—(6 flights)
  • Thu92%(25 flights)
  • Fri96%(24 flights)
  • Sat—(9 flights)
  • Sun76%(29 flights)
On-time by departure window
  • 6–9 AM—(9 flights)
  • 9 AM–12 PM92%(71 flights)
  • 12–3 PM80%(10 flights)
  • 3–6 PM80%(20 flights)
  • 6–9 PM67%(12 flights)
  • 9 PM–12 AM—(1 flights)
On-time trend by month
100%
Apr

Jun 69% → Apr 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%13
August 202582%11
September 202594%17
October 202593%15
November 202581%16
December 202585%13
April 2026100%16
Departures on time
86%
Diverted
0%
Flights flown
123
Months covered
11

Same route, other flights

Keep nerding

Based on 124 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.