Carrier route record
WNDEN→BUR
Southwest Airlines · Denver to Burbank
- Flights
- 1,297
- Period
- July 2025 to June 2026
- Share of route
- 58%
- Carriers
- 4
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Southwest Airlines.
Southwest on DEN to BUR sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 1,297 flights, with a median arrival right on schedule.
The national on-time rate over the same period is 77.6%, so Southwest on DEN to BUR runs 6 points behind the country as a whole. Across a thousand flights that is about 63 extra late arrivals.
Key figures
On time
71.3%
Arrivals under 15 minutes late, of 1,286 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
0.46%
National rate is 1.81%
Whole route
73.2%
Every carrier on DEN to BUR, 2,222 flights
These figures cover 1,297 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
Southwest against every carrier on DEN to BUR
Southwest flew 1,297 of the 2,222 flights on DEN to BUR, most of the route. Its 71.3% on time is 2 points worse than the route as a whole, which runs 73.2%. Ranked by on-time rate it is last of four carriers on the route, where the range runs from SkyWest at 100.0% to Southwest at 71.3%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
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 Airlinesthin sample | 1 | 100.0% | — | 0.00% | A+ |
| Frontier Airlinesthin sample | 43 | 79.1% | 30 min | 0.00% | B+ |
| United Airlines | 881 | 75.7% | 62 min | 0.23% | B+ |
| Southwest Airlines (this page) | 1,297 | 71.3% | 55 min | 0.46% | C+ |
Departure window
When Southwest runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 40 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–8am64 flights87.5%
- 8am–11am326 flights93.2%
- 11am–2pm251 flights72.3%
- 2pm–5pm164 flights69.3%
- 5pm–8pm213 flights56.3%
- 8pm–5am279 flights53.6%
Scale runs 45% to 100%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 53.6% on time, against 93.2% for the 8am–11am 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 8am–11am window is the busiest, with 326 flights scheduled in it.
Across the year
Southwest on DEN to BUR through the year
Delays peak in October, when the on-time rate falls to 61.0%. January is the strongest month at 84.9%. Moving a flexible trip across that boundary buys 24 points. July was the busiest month here, with 124 flights.
Across the week, Tuesday is the strongest day at 77.8% on time and Friday the weakest at 63.1%. 15 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Southwest runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 55% of the 20,000 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.
- 55%Late-arriving aircraft
- 36%Carrier
- 9%National Airspace System
- 1%Extreme weather
- 0%Security
55% 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 20,000 reported delay minutes here, that single category outweighs weather by 55 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 20,420 reported delay minutes.
The largest share of delay minutes, 36%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 7,272 of the 20,000 delay minutes reported here.
Cancellations are rare at 0.46%, 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 costs
7.9% 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 850 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 82.9% on time across 1,294 flights, 12 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 12 points of difference.
The sample behind these figures is 1,297 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.
What to do with this
Booking Southwest on DEN to BUR
Put together: the calendar is the biggest lever here, not the carrier or the hour. January runs 84.9% on time and October 61.0%, a swing of 24 points. If the dates move at all, move them out of October before you think about anything else. 1,286 completed flights over 12 months sit behind that.
Related
Where to go next
- DEN to BUR, every carrier
- Southwest on BUR to DEN, the return leg
- United Airlines on DEN to BUR75.7%
- Southwest Airlines network-wide record
- Denver International (DEN) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
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.