Route reliability record
LAX→ASE
Los Angeles to Aspen
- Flights
- 1,226
- Period
- September 2025 to August 2026
- Distance
- 737 mi
- Carriers
- 1
This route lands a B, level with the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 1,226 LAX to ASE flights, with a median arrival 11 minutes early.
Best time to fly LAX to ASE: a 5pm–8pm departure, ideally on a Tuesday. Flights in that window arrived on time 83.9% of the time and Tuesday flights 88.0%, against 77.9% for the route overall.
The US average over the same twelve months is 77.3%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
77.9%
Arrivals under 15 minutes late, of 1,140 completed flights
Avg delay
93 min
Across delayed arrivals only, not all flights
Cancelled
2.45%
National rate is 1.89%
Best carrier
SkyWest
77.9% on time across 1,226 flights
These figures cover 1,226 flights between September 2025 and August 2026. Beyond the headline rate, 11.1% 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
Which airline is most reliable on LAX to ASE
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines | 1,226 | 77.9% | 93 min | 2.45% | B |
Flight by flight
Flights on LAX to ASE
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
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
The best time of day to leave
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 1,226 flights.
- 5am–8am19 flights—
- 8am–11am592 flights78.1%
- 11am–2pm182 flights74.5%
- 2pm–5pm253 flights76.6%
- 5pm–8pm180 flights83.9%
- 8pm–5am—
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
The weak window here is the middle of the day, not the evening: 11am–2pm runs 74.5% on time against 83.9% for 5pm–8pm. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 8am–11am window is the busiest, with 592 flights scheduled in it.
Explore
Filter LAX to ASE by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On LAX to ASE, the best departure window is 5pm–8pm at 83.9% on time and the worst is 11am–2pm at 74.5%, a real gap of 9.4 points. All US flights leaving 5pm–8pm ran 68.0%.
- 5–8am—
- 8–11am78.1%
- 11am–2pm74.5%
- 2–5pm76.6%
- 5–8pm83.9%
- 8pm–5am—
best all US flightsScale 60% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
This route's year swings by 32 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.
December is the weak month at 66.1% on time, against 98.2% in November. 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. March was the busiest month here, with 201 flights.
Across the week, Tuesday is the strongest day at 88.0% on time and Saturday the weakest at 69.0%, a spread of 19 points.
Delay causes
Why this route gets delayed
Carrier accounts for 45% of the 24,000 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Carrier
- 34%National Airspace System
- 13%Late-arriving aircraft
- 8%Extreme weather
The largest share of delay minutes, 45%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 11,000 of the 24,000 delay minutes reported here. The split is drawn from 23,502 reported delay minutes.
34% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 8,052 minutes out of 24,000, against a national NAS share of 21%.
Cancellations sit at 2.45% against a national 1.89%, which is ordinary. Diversions add another 4.57%.
Connections and stage length
What a delay here actually costs
11.1% 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.
The 737 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg is a different operation and performs like one: it runs 73.9% on time across 1,228 flights, 4 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 4 points of difference.
The sample behind these figures is 1,226 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Work out the risk of missing a connection in ASE after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. November runs 98.2% on time and December 66.1%, a swing of 32 points. If the dates move at all, move them out of December before you think about anything else. 1,140 completed flights over 12 months sit behind that.
Common questions
LAX to ASE questions
How often is LAX to ASE delayed?
Roughly one flight in five arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 22.1% of the 1,226 flights in this analysis, against 22.7% nationally. Delayed flights are late by an hour and a half on average.
How reliable is LAX to ASE compared with the rest of the country?
77.9% of flights arrive on time here against a national 77.3%, a difference of half a point in its favour. That is worth a B on this site's grading scale.
What time of day has the fewest delays on LAX to ASE?
The 5pm–8pm departure window is the strongest at 83.9% on time. The 11am–2pm window is the weakest at 74.5%, 9 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are December delays on LAX to ASE?
December is the weakest month at 66.1% on time, compared with 98.2% in November. Across the year that is 32 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- ASE to LAX — the return legseparate record
- Los Angeles International (LAX) delay statistics
- LAX to SFO, a related route60.1%
- DEN to ASE, a related route74.2%
- LAX to JFK, a related route77.5%
- SkyWest Airlines on-time record77.9%
- Flying to ski country: which routes into the mountains run on time
- How often a connection fails at the major US hubs
Direction matters. LAX to ASE and ASE to LAX are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
Embed LAX to ASE’s on-time badge on your site
Paste this into a web page. The badge shows the current on-time rate, cancellation rate and grade, and updates every month. Preview it, or build a badge for another route or airport.
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.