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Flight Reliability

F9 1177 · Frontier Airlines

Los Angeles → Seattle (LAX–SEA)

72
Usually Fine
WanderNerd Reliability Score
80%
Arrive within 15 minutes
5 min
Average arrival delay
4.0%
Cancelled
8 min early
Median arrival delay

Based on 248 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

F9 1177 departing between 6–9 AM arrived on time 88% of the time, versus 59% between 9 PM–12 AM.

Sunday scaries are real for this one.

F9 1177 arrived on time 92% of the time on Thursdays and just 69% on Sundays. That gap is worth planning around.

A bit behind the LAX–SEA route.

F9 1177 arrived on time 80% of the time, versus 86% across the LAX–SEA route.

Better than the Frontier Airlines network average.

F9 1177 arrived on time 80% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon75%(44 flights)
  • Tue78%(18 flights)
  • Wed88%(17 flights)
  • Thu92%(38 flights)
  • Fri74%(46 flights)
  • Sat90%(40 flights)
  • Sun69%(35 flights)
On-time by departure window
  • 6–9 AM88%(49 flights)
  • 9 AM–12 PM70%(23 flights)
  • 12–3 PM85%(60 flights)
  • 3–6 PM80%(89 flights)
  • 9 PM–12 AM59%(17 flights)
On-time trend by month
94%
May

Jul 83% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
July 202583%12
August 202563%16
September 202588%16
October 202572%18
November 202573%22
December 202559%22
January 202682%17
February 2026100%19
March 202685%27
April 202679%29
May 202694%31
Departures on time
78%
Diverted
0%
Flights flown
238
Months covered
12

Same route, other flights

Keep nerding

Based on 248 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.