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Flight Reliability

F9 4000 · Frontier Airlines

San Francisco → Dallas–Fort Worth (SFO–DFW)99% of its flights flew this route. The rest (AUS–DFW) are included in these numbers.

43
Bring Snacks
WanderNerd Reliability Score
56%
Arrive within 15 minutes
15 min
Average arrival delay
4.0%
Cancelled
6 min
Median arrival delay

Based on 173 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

F9 4000 departing between 9 AM–12 PM arrived on time 77% of the time, versus 53% between 9 PM–12 AM.

Sunday scaries are real for this one.

F9 4000 arrived on time 74% of the time on Fridays and just 43% on Sundays. That gap is worth planning around.

Well behind the SFO–DFW route.

F9 4000 arrived on time 56% of the time, versus 75% across the SFO–DFW route.

Well behind the Frontier Airlines network.

F9 4000 arrived on time 56% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon59%(29 flights)
  • Tue—(6 flights)
  • Wed53%(15 flights)
  • Thu49%(33 flights)
  • Fri74%(38 flights)
  • Sat—(9 flights)
  • Sun43%(35 flights)
On-time by departure window
  • 9 AM–12 PM77%(13 flights)
  • 12–3 PM—(9 flights)
  • 3–6 PM63%(35 flights)
  • 6–9 PM—(1 flights)
  • 9 PM–12 AM53%(107 flights)
On-time trend by month
63%
May

Jun 50% → May 63% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202550%18
July 202547%17
August 202550%16
September 202544%16
October 202582%17
November 202539%18
December 202570%10
May 202663%27
Departures on time
51%
Diverted
0.6%
Flights flown
165
Months covered
12

Same route, other flights

Keep nerding

Based on 173 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.