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Flight Reliability

F9 1878 · Frontier Airlines

San Diego → Austin (SAN–AUS)

73
Usually Fine
WanderNerd Reliability Score
71%
Arrive within 15 minutes
6 min
Average arrival delay
1.5%
Cancelled
2 min early
Median arrival delay

Based on 134 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

F9 1878 departing between 9 AM–12 PM arrived on time 83% of the time, versus 50% between 12–3 PM.

Mondays have been rough.

F9 1878 arrived on time 90% of the time on Wednesdays and just 68% on Mondays. That gap is worth planning around.

A bit behind the SAN–AUS route.

F9 1878 arrived on time 71% of the time, versus 75% across the SAN–AUS route.

Slipping a little lately.

F9 1878 arrived on time 62% of the time over the last three months in the data, compared with 68% in the three months before that.

The breakdown

On-time by weekday
  • Mon68%(37 flights)
  • Tue—(0 flights)
  • Wed90%(10 flights)
  • Thu85%(13 flights)
  • Fri68%(38 flights)
  • Sat—(5 flights)
  • Sun69%(29 flights)
On-time by departure window
  • 6–9 AM81%(36 flights)
  • 9 AM–12 PM83%(18 flights)
  • 12–3 PM50%(34 flights)
  • 3–6 PM75%(44 flights)
On-time trend by month
60%
Mar

Jun 73% → Mar 60% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%11
July 202582%17
August 202588%16
September 202583%12
October 202559%17
November 202563%16
December 202546%11
January 202680%10
March 202660%10
Departures on time
71%
Diverted
0%
Flights flown
132
Months covered
11

Same route, other flights

Keep nerding

Based on 134 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.