Carrier route record
WNLAS→TUL
Southwest Airlines · Las Vegas to Tulsa
- Flights
- 635
- Period
- July 2025 to June 2026
- Share of route
- 85%
- Carriers
- 2
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Southwest Airlines.
Southwest on LAS to TUL sits in the middle of the pack with a B. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.6%. The late ones land roughly 55 minutes behind schedule. That rests on 635 flights, with a median arrival 2 minutes early.
The US average over the same twelve months is 77.6%, so there is little to separate Southwest on LAS to TUL from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
75.6%
Arrivals under 15 minutes late, of 626 completed flights
Avg delay
53 min
Across delayed arrivals only, not all flights
Cancelled
1.10%
National rate is 1.81%
Whole route
76.8%
Every carrier on LAS to TUL, 744 flights
These figures cover 635 flights between July 2025 and June 2026. The median arrival is 2 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
Southwest against every carrier on LAS to TUL
Southwest flew 635 of the 744 flights on LAS to TUL, most of the route. Its 75.6% on time is about level with the route as a whole at 76.8%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from Allegiant at 84.1% to Southwest at 75.6%. One 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 |
|---|---|---|---|---|---|
| Allegiant Airthin sample | 109 | 84.1% | 81 min | 1.83% | B |
| Southwest Airlines (this page) | 635 | 75.6% | 53 min | 1.10% | B |
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 54 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–8am47 flights97.9%
- 8am–11am178 flights84.3%
- 11am–2pm72 flights81.7%
- 2pm–5pm30 flights—
- 5pm–8pm242 flights71.8%
- 8pm–5am66 flights43.8%
Scale runs 35% to 100%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 43.8% on time, against 97.9% for the 5am–8am 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 5pm–8pm window is the busiest, with 242 flights scheduled in it.
Across the year
Southwest on LAS to TUL through the year
Delays peak in March, when the on-time rate falls to 63.6%. December is the strongest month at 87.1%. Moving a flexible trip across that boundary buys 23 points. July was the busiest month here, with 62 flights.
Across the week, Tuesday is the strongest day at 84.1% on time and Sunday the weakest at 65.6%. 19 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 58% of the 8,177 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.
- 58%Late-arriving aircraft
- 36%Carrier
- 5%National Airspace System
- 1%Security
- 0%Extreme weather
58% 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 8,177 reported delay minutes here, that single category outweighs weather by 58 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 8,177 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 2,933 of the 8,177 delay minutes reported here.
Cancellations sit at 1.10% against a national 1.81%, which is ordinary. Diversions add another 0.31%.
Connections and stage length
What a delay here costs
7.5% 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 roughly 55 minutes, which a normal layover absorbs.
The 1,076 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 83.4% on time across 635 flights, 8 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 8 points of difference.
One caution: this is a thin sample. 635 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 LAS to TUL
Put together: treat all of this as provisional. 635 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 75.6% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 626 completed flights over 12 months sit behind that.
Related
Where to go next
- LAS to TUL, every carrier
- Southwest on TUL to LAS, the return leg
- Allegiant Air on LAS to TUL84.1%
- Southwest Airlines network-wide record
- Harry Reid International (LAS) 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.