Carrier route record
WNSTS→BUR
Southwest Airlines · Santa Rosa to Burbank
- Flights
- 128
- Period
- September 2025 to August 2026
- Share of route
- 17%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Southwest Airlines.
Southwest on STS to BUR lands a B+, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by roughly 55 minutes on average. That rests on 128 flights, with a median arrival 8 minutes early.
Set against the rest of the country, Southwest's STS to BUR record is 6 points better than the US average of 77.3%. That gap is worth roughly 55 fewer late arrivals for every thousand flights.
Key figures
On time
82.8%
Arrivals under 15 minutes late, of 128 completed flights
Avg delay
54 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
Whole route
82.2%
Every carrier on STS to BUR, 741 flights
These figures cover 128 flights between September 2025 and August 2026. The median arrival is 8 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.
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Carrier by carrier
Southwest against every carrier on STS to BUR
Southwest flew 128 of the 741 flights on STS to BUR, about 17% of it. Its 82.8% on time is about level with the route as a whole at 82.2%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Southwest at 82.8% to SkyWest at 82.1%.
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 |
|---|---|---|---|---|---|
| Southwest Airlines (this page)thin sample | 128 | 82.8% | 54 min | 0.00% | B+ |
| SkyWest Airlines | 613 | 82.1% | 56 min | 2.77% | B |
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 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 35 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am8 flights—
- 11am–2pm79 flights93.7%
- 2pm–5pm41 flights58.5%
- 5pm–8pm—
- 8pm–5am—
Scale runs 50% to 100%. Rows with fewer than 30 flights show a dash.
The best window here is not the first bank but the 11am–2pm slot at 93.7% on time, ahead of 2pm–5pm at 58.5%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 11am–2pm window is the busiest, with 79 flights scheduled in it.
Across the year
Southwest on STS to BUR through the year
- Apr–Jun 202667 flights79.1%
- Jul–Sep 202661 flights86.9%
Scale runs 70% to 90%.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 82.8% on time across 128 flights.
Split by quarter, Southwest on STS to BUR logged 67 flights in Apr–Jun 2026 and 61 flights in Jul–Sep 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 82.8% annual figure is the one to use.
Arrival by arrival
How late Southwest on STS to BUR runs when it is late
Southwest on STS to BUR often beats the schedule: 44 of 128 completed flights, 34%, arrived 15 minutes or more early. The 22 late arrivals split 10 under half an hour, 8 between 30 and 60 minutes, and 4 an hour or more.
- 15+ min early44 flights34.4%
- Within 15 min62 flights48.4%
- 15–29 min late10 flights7.8%
- 30–59 min late8 flights6.3%
- 1–2 hours late2 flights1.6%
- 2+ hours late2 flights1.6%
Scale runs 0% to 100%.
Share of 128 completed flights by arrival against schedule.
A late pushback is often recovered here: of 32 departures that left 15 minutes late or more, 10 still arrived on time. No flight that left on time arrived late.
The worst days
Worst days for Southwest on STS to BUR
The latest arrival of the period was on 20 April 2026, 4 hours 42 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on five of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 20 April 2026 | 4 hours 42 minutes | Late-arriving aircraft |
| 25 May 2026 | 2 hours 45 minutes | Late-arriving aircraft |
| 24 June 2026 | 1 hour 51 minutes | Late-arriving aircraft |
| 19 July 2026 | 1 hour 42 minutes | Late-arriving aircraft |
| 24 April 2026 | 45 minutes | Late-arriving aircraft |
Delay causes
Why Southwest runs late on this route
Late-arriving aircraft accounts for 83% of the 1,178 delay minutes carriers reported here, and the remaining four split what is left.
- 83%Late-arriving aircraft
- 17%Carrier
83% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 1,178 reported delay minutes here, that single category outweighs weather by 83 to one. The split is drawn from 1,178 reported delay minutes.
Cancellations are rare at 0.00%, below the national 1.89% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and stage length
What a delay here costs
Badly late arrivals are rare here: only 3.1% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
At 387 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 11am–2pm window matters as much as it does.
The return leg is a different operation and performs like one: it runs 65.4% on time across 128 flights, 17 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 17 points of difference.
One caution: this is a thin sample. 128 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 Southwest on STS to BUR
Put together: treat all of this as provisional. 128 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 82.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 128 completed flights over 12 months sit behind that.
Related
Where to go next
- STS to BUR, every carrier
- Southwest on BUR to STS, the return leg
- SkyWest Airlines on STS to BUR82.1%
- Southwest Airlines network-wide record
- Hollywood Burbank (BUR) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
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.