Flight Reliability
F9 4204 · Frontier Airlines
Seattle → Las Vegas (SEA–LAS)
72
Usually Fine
WanderNerd Reliability Score
- 71%
- Arrive within 15 minutes
- 9 min
- Average arrival delay
- 1.8%
- Cancelled
- 2 min early
- Median arrival delay
Based on 57 historical flights. Data through May 2026.
What the data says
Thursday is the weak spot.
F9 4204 arrived on time 79% of the time on Sundays. On Thursdays: 64%.
A bit behind the SEA–LAS route.
F9 4204 arrived on time 71% of the time, versus 77% across the SEA–LAS route.
The breakdown
- Mon64%(11 flights)
- Tue—(4 flights)
- Wed—(0 flights)
- Thu64%(11 flights)
- Fri73%(11 flights)
- Sat—(5 flights)
- Sun79%(14 flights)
- 3–6 PM—(3 flights)
- 6–9 PM—(6 flights)
- 9 PM–12 AM70%(47 flights)
53%
Apr
Feb 69% → Apr 53% on time
| Month | On-time percentage | Flights |
|---|---|---|
| February 2026 | 69% | 16 |
| March 2026 | 82% | 17 |
| April 2026 | 53% | 15 |
- Departures on time
- 80%
- Diverted
- 0%
- Flights flown
- 56
- Months covered
- 5
Same route, other flights
Keep nerding
Based on 57 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.