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Flight Reliability

F9 3985 · Frontier Airlines

Philadelphia → Dallas–Fort Worth (PHL–DFW)

62
A Little Dicey
WanderNerd Reliability Score
72%
Arrive within 15 minutes
20 min
Average arrival delay
3.3%
Cancelled
6 min early
Median arrival delay

Based on 183 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

F9 3985 departing between 6–9 AM arrived on time 73% of the time, versus 57% between 6–9 PM.

Mondays have been rough.

F9 3985 arrived on time 82% of the time on Saturdays and just 64% on Mondays. That gap is worth planning around.

A bit behind the PHL–DFW route.

F9 3985 arrived on time 72% of the time, versus 77% across the PHL–DFW route.

Keep a backup plan handy.

F9 3985 was cancelled 3.3% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon64%(36 flights)
  • Tue—(4 flights)
  • Wed—(7 flights)
  • Thu69%(35 flights)
  • Fri73%(40 flights)
  • Sat82%(17 flights)
  • Sun68%(38 flights)
On-time by departure window
  • 3–6 AM—(6 flights)
  • 6–9 AM73%(124 flights)
  • 9 AM–12 PM—(6 flights)
  • 12–3 PM—(7 flights)
  • 3–6 PM60%(15 flights)
  • 6–9 PM57%(14 flights)
  • 9 PM–12 AM—(5 flights)
On-time trend by month
83%
May

Jun 44% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202544%18
July 202560%15
August 202565%17
September 202577%17
October 202575%20
November 2025100%13
February 202677%17
April 202667%15
May 202683%30
Departures on time
72%
Diverted
0%
Flights flown
177
Months covered
12

Same route, other flights

Keep nerding

Based on 183 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.