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Flight Reliability

F9 2553 · Frontier Airlines

Denver → Portland (DEN–PDX)

90
Nerd Approved
WanderNerd Reliability Score
82%
Arrive within 15 minutes
2 min
Average arrival delay
0%
Cancelled
6 min early
Median arrival delay

Based on 170 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

F9 2553 departing between 12–3 PM arrived on time 92% of the time, versus 57% between 9 PM–12 AM.

Sunday scaries are real for this one.

F9 2553 arrived on time 93% of the time on Wednesdays and just 73% on Sundays. That gap is worth planning around.

Better than the DEN–PDX route average.

F9 2553 arrived on time 82% of the time, versus 75% across the DEN–PDX route.

Better than the Frontier Airlines network average.

F9 2553 arrived on time 82% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon90%(20 flights)
  • Tue84%(32 flights)
  • Wed93%(14 flights)
  • Thu87%(23 flights)
  • Fri77%(22 flights)
  • Sat79%(33 flights)
  • Sun73%(26 flights)
On-time by departure window
  • 6–9 AM—(3 flights)
  • 9 AM–12 PM83%(94 flights)
  • 12–3 PM92%(13 flights)
  • 3–6 PM89%(18 flights)
  • 6–9 PM91%(21 flights)
  • 9 PM–12 AM57%(21 flights)
On-time trend by month
86%
May

Aug 82% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 202582%11
September 202592%13
October 202592%26
November 202596%23
December 202560%15
March 202680%15
April 202686%21
May 202686%22
Departures on time
81%
Diverted
0%
Flights flown
170
Months covered
11

Same route, other flights

Keep nerding

Based on 170 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.