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Flight Reliability

F9 3823 · Frontier Airlines

Los Angeles → Portland (LAX–PDX)

78
Usually Fine
WanderNerd Reliability Score
80%
Arrive within 15 minutes
4 min
Average arrival delay
2.3%
Cancelled
9 min early
Median arrival delay

Based on 175 historical flights. Data through May 2026.

What the data says

12–3 PM has a slight edge.

Departures between 12–3 PM arrived on time 83% of the time, against 78% between 9 AM–12 PM.

Saturdays have been rough.

F9 3823 arrived on time 88% of the time on Sundays and just 70% on Saturdays. That gap is worth planning around.

A bit behind the LAX–PDX route.

F9 3823 arrived on time 80% of the time, versus 86% across the LAX–PDX route.

A bit ahead of the Frontier Airlines network.

F9 3823 arrived on time 80% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon87%(38 flights)
  • Tue—(2 flights)
  • Wed—(1 flights)
  • Thu83%(30 flights)
  • Fri70%(37 flights)
  • Sat70%(30 flights)
  • Sun88%(33 flights)
On-time by departure window
  • 6–9 AM—(4 flights)
  • 9 AM–12 PM78%(123 flights)
  • 12–3 PM83%(24 flights)
  • 3–6 PM—(4 flights)
  • 6–9 PM81%(16 flights)
On-time trend by month
58%
Jan

Jun 67% → Jan 58% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202567%21
July 202570%20
August 202582%22
September 202576%21
October 202582%22
November 2025100%17
December 202584%19
January 202658%12
Departures on time
73%
Diverted
0%
Flights flown
171
Months covered
11

Same route, other flights

Keep nerding

Based on 175 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.