Carrier route record
F9ATL→LAX
Frontier Airlines · Atlanta to Los Angeles
- Flights
- 490
- Period
- September 2025 to August 2026
- Share of route
- 10%
- Carriers
- 4
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on ATL to LAX sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 490 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 3,817 at 79.1% on time.
The national on-time rate over the same period is 77.3%, so Frontier on ATL to LAX runs 7 points behind the country as a whole. Across a thousand flights that is about 68 extra late arrivals.
Key figures
On time
70.5%
Arrivals under 15 minutes late, of 482 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
1.63%
National rate is 1.89%
Whole route
77.8%
Every carrier on ATL to LAX, 4,851 flights
These figures cover 490 flights between September 2025 and August 2026. Beyond the headline rate, 10.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
Frontier against every carrier on ATL to LAX
Frontier flew 490 of the 4,851 flights on ATL to LAX, about 10% of it. Its 70.5% on time is 7 points worse than the route as a whole, which runs 77.8%. Ranked by on-time rate it is last of four carriers on the route, where the range runs from Delta at 79.1% to Frontier at 70.5%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 79.1% of the time; American Airlines manages 73.0%. Sample sizes sit next to every figure, because a two-point gap across 377 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 3,817 | 79.1% | 57 min | 0.73% | B+ |
| Spirit Airlinesthin sample | 167 | 78.9% | 92 min | 0.60% | B+ |
| American Airlines | 377 | 73.0% | 120 min | 0.80% | C+ |
| Frontier Airlines (this page) | 490 | 70.5% | 61 min | 1.63% | C |
Delta leads American by 6 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.
Flight by flight
Frontier flight numbers on ATL to LAX
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When Frontier runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 12 points, against 6 points between the best and worst carrier.
- 5am–8am15 flights—
- 8am–11am242 flights75.1%
- 11am–2pm52 flights64.7%
- 2pm–5pm117 flights62.9%
- 5pm–8pm64 flights73.0%
- 8pm–5am—
Scale runs 55% to 80%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 75.1% of the time, against 62.9% for the afternoon window. That is 12 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 242 flights scheduled in it.
Across the year
Frontier on ATL to LAX through the year
January is the weak month at 55.6% on time, against 85.1% in September. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. June was the busiest month here, with 60 flights.
Across the week, Wednesday is the strongest day at 78.8% on time and Friday the weakest at 62.0%, a spread of 17 points.
Arrival by arrival
How late Frontier on ATL to LAX runs when it is late
Frontier on ATL to LAX often beats the schedule: 136 of 482 completed flights, 28%, arrived 15 minutes or more early. The 142 late arrivals split 50 under half an hour, 44 between 30 and 60 minutes, and 48 an hour or more.
- 15+ min early136 flights28.2%
- Within 15 min204 flights42.3%
- 15–29 min late50 flights10.4%
- 30–59 min late44 flights9.1%
- 1–2 hours late32 flights6.6%
- 2+ hours late16 flights3.3%
Scale runs 0% to 100%.
Share of 482 completed flights by arrival against schedule.
A late pushback is often recovered here: of 191 departures that left 15 minutes late or more, 70 still arrived on time. 21 flights left on time and still arrived late.
The worst days
Worst days for Frontier on ATL to LAX
The latest arrival of the period was on 16 March 2026, 5 hours 32 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 16 March 2026 | 5 hours 32 minutes | Late-arriving aircraft |
| 7 December 2025 | 5 hours 7 minutes | Carrier |
| 21 January 2026 | 5 hours 2 minutes | Late-arriving aircraft |
| 30 November 2025 | 3 hours 56 minutes | Carrier |
| 21 June 2026 | 3 hours 34 minutes | Late-arriving aircraft |
Delay causes
Why Frontier runs late on this route
Carrier accounts for 45% of the 8,720 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Carrier
- 42%Late-arriving aircraft
- 13%National Airspace System
- 1%Extreme weather
42% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 8,720 reported delay minutes here, that single category outweighs weather by 42 to one. The split is drawn from 8,720 reported delay minutes.
The largest share of delay minutes, 45%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,895 of the 8,720 delay minutes reported here.
Cancellations sit at 1.63% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
10.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 1,947 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The return leg runs 68.2% on time across 489 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
One caution: this is a thin sample. 490 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking Frontier on ATL to LAX
Put together: treat all of this as provisional. 490 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 70.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 482 completed flights over 12 months sit behind that.
Related
Where to go next
- ATL to LAX, every carrier
- Frontier on LAX to ATL, the return leg
- Delta Air Lines on ATL to LAX79.1%
- Spirit Airlines on ATL to LAX78.9%
- American Airlines on ATL to LAX73.0%
- Frontier Airlines network-wide record
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Los Angeles International (LAX) delay statistics
- Why the first flight of the morning is statistically safest
- How often a connection fails at the major US hubs
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.