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Flight Reliability

F9 2631 · Frontier Airlines

Dallas–Fort Worth → Denver (DFW–DEN)

80
Pretty Reliable
WanderNerd Reliability Score
77%
Arrive within 15 minutes
13 min
Average arrival delay
0.8%
Cancelled
10 min early
Median arrival delay

Based on 253 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

F9 2631 departing between 12–3 PM arrived on time 80% of the time, versus 70% between 6–9 PM.

Wednesday is the weak spot.

F9 2631 arrived on time 84% of the time on Thursdays. On Wednesdays: 70%.

A bit ahead of the DFW–DEN route.

F9 2631 arrived on time 77% of the time, versus 70% across the DFW–DEN route.

A bit ahead of the Frontier Airlines network.

F9 2631 arrived on time 77% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon71%(35 flights)
  • Tue72%(32 flights)
  • Wed70%(27 flights)
  • Thu84%(49 flights)
  • Fri80%(35 flights)
  • Sat79%(29 flights)
  • Sun75%(44 flights)
On-time by departure window
  • 6–9 AM—(1 flights)
  • 9 AM–12 PM76%(25 flights)
  • 12–3 PM80%(147 flights)
  • 3–6 PM71%(31 flights)
  • 6–9 PM70%(47 flights)
On-time trend by month
80%
May

Jun 60% → May 80% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%10
July 202554%13
August 202565%20
September 202596%23
October 202575%28
November 202583%29
December 202585%13
January 202679%19
February 202684%25
March 202671%31
April 202670%20
May 202680%20
Departures on time
76%
Diverted
0%
Flights flown
251
Months covered
12

Same route, other flights

Keep nerding

Based on 253 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.