About 1 in 5 F9 1177 flights from Los Angeles arrived 15+ minutes late, diverted or cancelled over the past year (19%); 3.3% were cancelled. The typical flight landed 11 minutes early.
F9 1177: LAX → SEA
Scheduled to leave Los Angeles at 3:04 p.m. local time. Over the past year it arrived on time 81% of the time (303 flights), worse than other F9 flights on the route at that hour (87%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 50 | 74% |
| Tuesday | 31 | 77% |
| Wednesday | 31 | 87% |
| Thursday | 49 | 90% |
| Friday | 49 | 78% |
| Saturday | 44 | 86% |
| Sunday | 49 | 73% |
Why it was late
All flights LAX → SEA · Connecting off F9 1177? Check the risk
Questions
How often is F9 1177 from LAX to SEA late?
Frontier Airlines 1177 from Los Angeles, CA to Seattle, WA arrived 15 or more minutes late, was diverted or was cancelled on 19% of 303 scheduled flights between September 2025 and August 2026. 3.3% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Frontier Airlines for today's flight. Method.