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Flight Reliability

F9 4103 · Frontier Airlines

Las Vegas → San Jose (LAS–SJC)

76
Usually Fine
WanderNerd Reliability Score
76%
Arrive within 15 minutes
7 min
Average arrival delay
1.8%
Cancelled
8 min early
Median arrival delay

Based on 166 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

F9 4103 departing between 6–9 AM arrived on time 100% of the time, versus 50% between 12–3 PM.

Monday is the weak spot.

F9 4103 arrived on time 81% of the time on Thursdays. On Mondays: 68%.

A bit behind the LAS–SJC route.

F9 4103 arrived on time 76% of the time, versus 80% across the LAS–SJC route.

Trending in the right direction.

F9 4103 arrived on time 86% of the time over the last three months in the data, compared with 73% in the three months before that.

The breakdown

On-time by weekday
  • Mon68%(37 flights)
  • Tue—(2 flights)
  • Wed—(1 flights)
  • Thu81%(41 flights)
  • Fri74%(39 flights)
  • Sat—(4 flights)
  • Sun77%(39 flights)
On-time by departure window
  • 6–9 AM100%(11 flights)
  • 9 AM–12 PM68%(28 flights)
  • 12–3 PM50%(14 flights)
  • 3–6 PM78%(106 flights)
  • 6–9 PM—(4 flights)
On-time trend by month
90%
May

Jun 47% → May 90% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202547%15
July 202569%13
August 202571%17
September 202575%12
October 202590%10
November 202580%10
December 202573%11
January 202675%16
February 202673%11
March 2026100%12
April 202669%16
May 202690%20
Departures on time
75%
Diverted
0%
Flights flown
163
Months covered
12

Same route, other flights

Keep nerding

Based on 166 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.