Flight profile · Southwest Airlines
WN34
Houston (HOU) to Dallas (DAL) · scheduled 2:30 PM – 3:40 PM
How WN34 performs
722 operations, July 2023 – August 2026.
Between its first and last recorded date on HOU → DAL, WN34 averaged about 4 operations a week (722 in 1,154 days, cancelled ones included).
WN34 arrived on time 77.7% of the time, against 81.4% for all HOU → DAL flights, so this departure is 3.7 percentage points worse than the route as a whole. Against Southwest Airlines’ own flights on this route it is 3.7 points worse.
Source: US DOT Bureau of Transportation Statistics · 722 operations, July 2023 – August 2026 · If WN34 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where WN34 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| WN34 | 77.7% | 1.66% | -4 min | 8.5% | 722 |
| Southwest Airlines on HOU → DAL | 81.4% | 2.02% | -8 min | 6.1% | 13,009 |
| All HOU → DAL flights | 81.4% | 2.02% | -8 min | 6.1% | 13,009 |
WN34 cancelled 12 of 722 operations (1.66%), close to the 2.02% for HOU → DAL.
8.5% of WN34’s arrivals were an hour or more late, against 6.1% across HOU → DAL, so the long delays are more common on this number than on the route.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026
Why WN34 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
crew, maintenance, boarding and fueling, all within the carrier’s control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for WN34 on HOU → DAL. Only delays of 15 minutes or more are attributed. What the five causes mean
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – August 2026
Does a late aircraft delay this flight?
How often the plane that flies WN34 comes in late, and what that does to the departure.
The aircraft flying WN34 came in 15 or more minutes late on 13% of the departures where its previous flight is known. There are not enough departures in both groups to say how the flight left after a late one and after an on-time one.
Matched by tail number to the aircraft’s previous flight into HOU: 676 of 710 departures. Unknown, cancelled or diverted inbounds and gaps over 12 hours are left out.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late |
|---|---|
| WN34 | 13% |
| Network, same turn | 18% |
45 scheduled minutes is enough to clean and board when the aircraft is on time, with little to spare when it is not.
The network row is every flight with a scheduled turn of 45 to 59 minutes. How often WN34’s aircraft landed 15 or more minutes late is lower than the network’s. There are not enough departures in both groups to compare how it left.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – August 2026
From pushback to gate
When it leaves HOU late, does that still matter by the time it reaches DAL?
WN34 pushes back an average of 15.2 minutes late and reaches the gate at DAL an average of 9.4 minutes late. The 5.7 minutes between those two figures are slack the published schedule already carries, so a late pushback is partly, not fully, made up before the gate. Its 13.2 minutes on the taxiways at HOU is about what any departure from the airport in that hour spends.
On arrival at DAL, WN34 spends 4.9 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is about what any arrival at DAL spends on the ground before reaching the gate.
Taxi-out is gate to wheels up and sits inside the scheduled block; the hourly comparison is 11,510 HOU departures. Taxi-in is landing to gate, set against 229,763 arrivals at DAL. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026
The hour it leaves HOU
WN34 has one departure time, 2:30 PM, so this is what that hour at HOU is worth.
On-time arrival rate. 11,510 departures from HOU are scheduled in the 2 PM–3 PM hour over the period, against 176,550 across the whole day.
WN34 is scheduled out of HOU at 2:30 PM, in the 2 PM–3 PM bank. Departures from HOU in that hour arrive on time 71.1% of the time against 78.7% across the airport’s whole day — the slot alone is worth 7.7 points worse before anything about this particular flight is considered.
Both airport figures cover every destination from HOU, so they describe the slot, not this journey; the route comparison is above. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026 · Hours below 120 departures are not scored.
Other routes WN34 has flown
Carriers reassign flight numbers. WN34 also served these 40 other city pairs in the period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| CRP→HOU Corpus Christi to Houston | February 13, 2025 – August 29, 2026 | 71 | — |
| DAL→BWI Dallas to Baltimore | August 8–29, 2026 | 4 | — |
| SNA→SMF Santa Ana to Sacramento | July 7–29, 2026 | 8 | — |
| DAL→TUS Dallas to Tucson | February 12, 2026 – March 1, 2026 | 8 | — |
| TUS→LAX Tucson to Los Angeles | February 12, 2026 – March 1, 2026 | 8 | — |
| DAL→LIT Dallas to Little Rock | November 2, 2025 – January 5, 2026 | 17 | — |
| LIT→STL Little Rock to St. Louis | November 2, 2025 – January 5, 2026 | 17 | — |
| DAL→PHX Dallas to Phoenix | August 10, 2025 – November 1, 2025 | 12 | — |
| DAL→CLT Dallas to Charlotte | April 11, 2024 – October 30, 2025 | 61 | — |
| PHX→BUR Phoenix to Burbank | August 10, 2025 – September 28, 2025 | 7 | — |
| DAL→LBB Dallas to Lubbock | April 14, 2024 – August 31, 2025 | 8 | — |
| DAL→TPA Dallas to Tampa | June 5, 2025 – August 4, 2025 | 26 | — |
| DAL→ATL Dallas to Atlanta | April 10, 2025 – June 2, 2025 | 24 | — |
| DAL→SAN Dallas to San Diego | August 10, 2024 – June 1, 2025 | 15 | — |
| SAN→SJC San Diego to San Jose | April 13, 2025 – June 1, 2025 | 7 | — |
| DAL→MDW Dallas to Chicago | May 25, 2025 | 1 | — |
| DAL→SRQ Dallas to Sarasota/Bradenton | March 6, 2025 – April 7, 2025 | 15 | — |
| DAL→MCO Dallas to Orlando | March 8, 2025 – April 5, 2025 | 5 | — |
| DAL→SAV Dallas to Savannah | March 11, 2025 – April 2, 2025 | 8 | — |
| DAL→STL Dallas to St. Louis | November 26, 2024 – January 5, 2025 | 12 | — |
| DAL→TUL Dallas to Tulsa | November 3, 2024 – January 3, 2025 | 15 | — |
| TUL→STL Tulsa to St. Louis | November 3, 2024 – January 3, 2025 | 15 | — |
| SAN→RNO San Diego to Reno | August 10, 2024 – September 28, 2024 | 8 | — |
| BUR→PHX Burbank to Phoenix | June 6, 2024 – August 2, 2024 | 24 | — |
| PHX→HOU Phoenix to Houston | June 6, 2024 – August 2, 2024 | 24 | — |
| DAL→MCI Dallas to Kansas City | March 7, 2024 – April 8, 2024 | 15 | — |
| MDW→MSY Chicago to New Orleans | January 9, 2024 – March 6, 2024 | 18 | — |
| MSY→HOU New Orleans to Houston | January 9, 2024 – March 6, 2024 | 18 | — |
| COS→DEN Colorado Springs to Denver | November 21, 2023 – January 2, 2024 | 11 | — |
| DAL→COS Dallas to Colorado Springs | November 21, 2023 – January 2, 2024 | 11 | — |
| LGB→HOU Long Beach to Houston | November 21, 2023 – January 2, 2024 | 11 | — |
| OAK→LGB Oakland to Long Beach | November 21, 2023 – January 2, 2024 | 11 | — |
| OMA→HOU Omaha to Houston | October 5, 2023 – November 3, 2023 | 14 | — |
| ATL→JAX Atlanta to Jacksonville | September 7, 2023 – October 2, 2023 | 12 | — |
| JAX→HOU Jacksonville to Houston | September 7, 2023 – October 2, 2023 | 12 | — |
| MEM→ATL Memphis to Atlanta | September 7, 2023 – October 2, 2023 | 12 | — |
| LGA→MDW New York to Chicago | July 11, 2023 – August 14, 2023 | 25 | — |
| MDW→TPA Chicago to Tampa | July 11, 2023 – August 14, 2023 | 25 | — |
| TPA→HOU Tampa to Houston | July 11, 2023 – August 14, 2023 | 25 | — |
| MDW→HOU Chicago to Houston | July 4–10, 2023 | 5 | — |
The figures above describe only HOU → DAL, the route WN34 flies now.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
51 min late
against a median of 4 min early
Percentiles over 722 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – August 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| WN4 | Southwest Airlines | 95.2% | 12 min early | 680 |
| WN1636 | Southwest Airlines | 94.6% | 11 min early | 910 |
| WN34 this flight | Southwest Airlines | 77.7% | 4 min early | 722 |
| WN52 | Southwest Airlines | 73.5% | 5 min early | 740 |
| WN54 | Southwest Airlines | 72.7% | 4 min early | 640 |
Among all 5 departures on this route with at least 600 operations, WN34 has the 3rd highest on-time rate, 17.5 points behind the best. Every departure here has at least 600 operations; the other rows are the most punctual on the route, not all of them.
Data and methodology
Calculated by FlyerIntel from 722 records of WN34 operating HOU → DAL, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule; cancelled and diverted flights are reported separately, not in the on-time rate.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
Analysis last recomputed