Route reliability record
SBA→DEN
Santa Barbara to Denver
- Flights
- 1,097
- Period
- July 2025 to June 2026
- Distance
- 916 mi
- Carriers
- 2
This route lands a B, 6 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 1,097 SBA to DEN flights, with a median arrival 9 minutes early.
Best time to fly SBA to DEN: a 5am–8am departure, ideally on a Wednesday. Flights in that window arrived on time 94.0% of the time and Wednesday flights 89.7%, against 83.6% for the route overall.
Set against the rest of the country, this route's record is 6 points better than the US average of 77.6%. That gap is worth roughly 60 fewer late arrivals for every thousand flights.
Key figures
On time
83.6%
Arrivals under 15 minutes late, of 1,082 completed flights
Avg delay
64 min
Across delayed arrivals only, not all flights
Cancelled
1.19%
National rate is 1.81%
Best carrier
United
84.4% on time across 827 flights
These figures cover 1,097 flights between July 2025 and June 2026. The median arrival is 9 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
Carrier by carrier
Which airline is most reliable on SBA to DEN
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 |
|---|---|---|---|---|---|
| United Airlines | 827 | 84.4% | 68 min | 1.33% | B |
| Southwest Airlinesthin sample | 270 | 81.3% | 54 min | 0.74% | B+ |
Departure window
The best time of day to leave
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 31 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am469 flights94.0%
- 8am–11am15 flights—
- 11am–2pm461 flights77.8%
- 2pm–5pm62 flights62.9%
- 5pm–8pm90 flights73.6%
- 8pm–5am—
Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 94.0% of the time, against 62.9% for the afternoon window. That is 31 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 469 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 20 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.
August is the worst month at 71.7% on time, 20 points below April, the best at 91.9%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. July was the busiest month here, with 112 flights.
Across the week, Wednesday is the strongest day at 89.7% on time and Friday the weakest at 80.4%. 9 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
One category carries most of the weight here. National Airspace System accounts for 46% of the 11,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 46%National Airspace System
- 25%Carrier
- 23%Late-arriving aircraft
- 7%Extreme weather
46% 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 5,208 minutes out of 11,000, against a national NAS share of 21%. The split is drawn from 11,390 reported delay minutes.
Cancellations sit at 1.19% against a national 1.81%, which is ordinary. Diversions add another 0.18%.
Connections and stage length
What a delay here actually costs
5.8% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
The 916 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg is a different operation and performs like one: it runs 74.4% on time across 1,097 flights, 9 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 9 points of difference.
The sample behind these figures is 1,097 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 DEN 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. April runs 91.9% on time and August 71.7%, a swing of 20 points. If the dates move at all, move them out of August before you think about anything else. 1,082 completed flights over 12 months sit behind that.
Common questions
SBA to DEN questions
How often is SBA to DEN delayed?
About one flight in six arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 16.4% of the 1,097 flights in this analysis, against 22.4% nationally. Delayed flights are late by about an hour on average.
How reliable is SBA to DEN compared with the rest of the country?
83.6% of flights arrive on time here against a national 77.6%, a difference of 6 points in its favour. That is worth a B on this site's grading scale.
What time of day has the fewest delays on SBA to DEN?
The 5am–8am departure window is the strongest at 94.0% on time. The 2pm–5pm window is the weakest at 62.9%, 31 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 August delays on SBA to DEN?
August is the weakest month at 71.7% on time, compared with 91.9% in April. Across the year that is 20 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
- DEN to SBA — the return legseparate record
- Denver International (DEN) delay statistics
- United Airlines on SBA to DEN84.4%
- Southwest Airlines on SBA to DEN81.3%
- SBA to SFO, a related route62.9%
- PHX to DEN, a related route77.2%
- SBA to PHX, a related route84.4%
- United Airlines on-time record84.4%
- Southwest Airlines on-time record81.3%
- The best time of day to fly, according to 7.04 million flight records
- Worst months to fly in the US, ranked by the data
Direction matters. SBA to DEN and DEN to SBA are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.