Route reliability record
DEN→SBA
Denver to Santa Barbara
- Flights
- 1,097
- Period
- July 2025 to June 2026
- Distance
- 916 mi
- Carriers
- 2
This route sits in the middle of the pack with a C+. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 1,097 DEN to SBA flights, with a median arrival 1 minute early.
Best time to fly DEN to SBA: a 11am–2pm departure, ideally on a Tuesday. Flights in that window arrived on time 81.5% of the time and Tuesday flights 81.7%, against 74.4% for the route overall.
The US average over the same twelve months is 77.6%, 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
74.4%
Arrivals under 15 minutes late, of 1,084 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
0.55%
National rate is 1.81%
Best carrier
United
76.0% on time across 827 flights
These figures cover 1,097 flights between July 2025 and June 2026. On-time means an arrival less than 15 minutes after the scheduled gate time, the same threshold the Department of Transportation uses in its own reports. Cancelled and diverted flights are excluded from the on-time rate and counted separately, which is why the cancellation column matters on its own.
Carrier by carrier
Which airline is most reliable on DEN to SBA
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 | 76.0% | 56 min | 0.73% | B+ |
| Southwest Airlinesthin sample | 270 | 69.8% | 54 min | 0.00% | C+ |
Flight by flight
Flights on DEN to SBA
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.
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 25 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–8am—
- 8am–11am38 flights78.4%
- 11am–2pm420 flights81.5%
- 2pm–5pm169 flights78.3%
- 5pm–8pm345 flights69.9%
- 8pm–5am125 flights56.6%
Scale runs 50% to 85%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 56.6% on time, against 81.5% for the 11am–2pm slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 11am–2pm window is the busiest, with 420 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 33 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.
June is the worst month at 54.7% on time, 33 points below February, the best at 88.0%. 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, Tuesday is the strongest day at 81.7% on time and Monday the weakest at 70.8%. 11 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. Late-arriving aircraft accounts for 52% of the 15,000 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.
- 52%Late-arriving aircraft
- 31%Carrier
- 15%National Airspace System
- 1%Extreme weather
52% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 15,000 reported delay minutes here, that single category outweighs weather by 52 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 15,261 reported delay minutes.
Cancellations are rare at 0.55%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here actually costs
7.2% 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 83.6% on time across 1,097 flights, 9 points above 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 SBA 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. February runs 88.0% on time and June 54.7%, a swing of 33 points. If the dates move at all, move them out of June before you think about anything else. 1,084 completed flights over 12 months sit behind that.
Common questions
DEN to SBA questions
How often is DEN to SBA delayed?
About one flight in four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 25.6% 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 DEN to SBA compared with the rest of the country?
74.4% of flights arrive on time here against a national 77.6%, a difference of 3 points against it. That is worth a C+ on this site's grading scale.
What time of day has the fewest delays on DEN to SBA?
The 11am–2pm departure window is the strongest at 81.5% on time. The 8pm–5am window is the weakest at 56.6%, 25 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 June delays on DEN to SBA?
June is the weakest month at 54.7% on time, compared with 88.0% in February. Across the year that is 33 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
- SBA to DEN — the return legseparate record
- Denver International (DEN) delay statistics
- United Airlines on DEN to SBA76.0%
- Southwest Airlines on DEN to SBA69.8%
- DEN to PHX, a related route75.7%
- SFO to SBA, a related route80.1%
- DEN to SLC, a related route77.5%
- United Airlines on-time record76.0%
- Southwest Airlines on-time record69.8%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
Direction matters. DEN to SBA and SBA to DEN 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.