Flight Reliability
F9 1178 · Frontier Airlines
Seattle → Los Angeles (SEA–LAX)
84
Pretty Reliable
WanderNerd Reliability Score
- 84%
- Arrive within 15 minutes
- 4 min early
- Average arrival delay
- 2.0%
- Cancelled
- 14 min early
- Median arrival delay
Based on 149 historical flights. Data through May 2026.
What the data says
Morning-you made the right choice.
F9 1178 departing between 9 AM–12 PM arrived on time 88% of the time, versus 79% between 3–6 PM.
Mondays have been rough.
F9 1178 arrived on time 95% of the time on Saturdays and just 78% on Mondays. That gap is worth planning around.
Better than the Frontier Airlines network average.
F9 1178 arrived on time 84% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon78%(23 flights)
- Tue79%(14 flights)
- Wed83%(12 flights)
- Thu89%(27 flights)
- Fri83%(23 flights)
- Sat95%(19 flights)
- Sun82%(28 flights)
- 9 AM–12 PM88%(88 flights)
- 12–3 PM—(7 flights)
- 3–6 PM79%(14 flights)
- 6–9 PM81%(37 flights)
90%
May
Sep 65% → May 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| September 2025 | 65% | 17 |
| February 2026 | 79% | 19 |
| March 2026 | 89% | 27 |
| April 2026 | 82% | 28 |
| May 2026 | 90% | 31 |
- Departures on time
- 89%
- Diverted
- 0%
- Flights flown
- 146
- Months covered
- 9
Same route, other flights
Keep nerding
Based on 149 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.