Route reliability record
DAL→HOU
Dallas to Houston
- Flights
- 4,044
- Period
- September 2025 to August 2026
- Distance
- 239 mi
- Carriers
- 1
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 77.3%. The late ones land roughly 55 minutes behind schedule. That rests on 4,044 DAL to HOU flights, with a median arrival 5 minutes early.
Best time to fly DAL to HOU: a 5am–8am departure, ideally on a Tuesday. Flights in that window arrived on time 93.0% of the time and Tuesday flights 81.6%, against 74.8% for the route overall.
The US average over the same twelve months is 77.3%, 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
74.8%
Arrivals under 15 minutes late, of 3,962 completed flights
Avg delay
54 min
Across delayed arrivals only, not all flights
Cancelled
1.95%
National rate is 1.89%
Best carrier
Southwest
74.8% on time across 4,044 flights
These figures cover 4,044 flights between September 2025 and August 2026. The median arrival is 5 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
Which airline is most reliable on DAL to HOU
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 | 4,044 | 74.8% | 54 min | 1.95% | C |
Flight by flight
Flights on DAL to HOU
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.
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Best ways to make this trip
The most reliable ways to fly Dallas to Houston
Every airline on this route and on the routes between nearby airports, ranked by how often a scheduled flight actually operated and arrived on time. 4 of the top 5 use a different airport at one end.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. DFW → HOUDallas-Fort Worth to Houston | Envoy Air | 80.4% | 82.8% | 2.86% | 11am–2pm, Tue | — |
| 2. DFW → IAHDallas-Fort Worth to Houston | United Airlines | 77.7% | 79.1% | 1.71% | 11am–2pm, Tue | UA 2260 05:15 |
| 3. DFW → IAHDallas-Fort Worth to Houston | Envoy Air | 76.1% | 78.0% | 2.39% | 5pm–8pm, Tue | — |
| 4. DAL → HOUDallas to Houston | Southwest Airlines | 73.3% | 74.8% | 1.95% | 5am–8am, Tue | WN 1628 06:00 |
| 5. DFW → HOUDallas-Fort Worth to Houston | SkyWest Airlines | 72.3% | 74.6% | 3.12% | 5am–8am, Tue | — |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
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 36 points, against half a point between the best and worst carrier.
- 5am–8am651 flights93.0%
- 8am–11am733 flights86.0%
- 11am–2pm689 flights75.7%
- 2pm–5pm807 flights69.9%
- 5pm–8pm688 flights62.4%
- 8pm–5am476 flights57.4%
Scale runs 50% to 100%.
The 8pm–5am window is where this operation falls apart: 57.4% on time, against 93.0% 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 2pm–5pm window is the busiest, with 807 flights scheduled in it.
Explore
Filter DAL to HOU by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On DAL to HOU, the best departure window is 5am–8am at 93.0% on time and the worst is 8pm–5am at 57.4%, a wide gap of 35.6 points. All US flights leaving 5am–8am ran 89.3%.
- 5–8am93.0%
- 8–11am86.0%
- 11am–2pm75.7%
- 2–5pm69.9%
- 5–8pm62.4%
- 8pm–5am57.4%
best all US flightsScale 50% to 95%.
Across the year
When delays peak on this route
This route's year swings by 26 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.
Delays peak in March, when the on-time rate falls to 61.3%. January is the strongest month at 87.0%. Moving a flexible trip across that boundary buys 26 points. March was the busiest month here, with 364 flights.
Across the week, Tuesday is the strongest day at 81.6% on time and Sunday the weakest at 67.2%, a spread of 14 points.
Delay causes
Why this route gets delayed
Late-arriving aircraft accounts for 47% of the 54,000 delay minutes carriers reported here, and the remaining four split what is left.
- 47%Late-arriving aircraft
- 27%Carrier
- 23%National Airspace System
- 3%Extreme weather
47% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 54,000 reported delay minutes here, that single category outweighs weather by 15 to one. The split is drawn from 53,819 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 93.0% on time here.
Cancellations sit at 1.95% against a national 1.89%, which is ordinary. Diversions add another 0.07%.
Connections and stage length
What a delay here actually costs
7.1% of arrivals land an hour or more late, close to the national 8.3%, so 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.
At 239 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 5am–8am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 81.6% on time across 4,039 flights, 7 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 7 points of difference.
The sample behind these figures is 4,044 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 HOU 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. January runs 87.0% on time and March 61.3%, a swing of 26 points. If the dates move at all, move them out of March before you think about anything else. 3,962 completed flights over 12 months sit behind that.
Common questions
DAL to HOU questions
How often is DAL to HOU 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 25.2% of the 4,044 flights in this analysis, against 22.7% nationally. Delayed flights are late by roughly 55 minutes on average.
How reliable is DAL to HOU compared with the rest of the country?
74.8% of flights arrive on time here against a national 77.3%, 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 DAL to HOU?
The 5am–8am departure window is the strongest at 93.0% on time. The 8pm–5am window is the weakest at 57.4%, 36 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 March delays on DAL to HOU?
March is the weakest month at 61.3% on time, compared with 87.0% in January. Across the year that is 26 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
- HOU to DAL — the return legseparate record
- Dallas Love Field (DAL) delay statistics
- William P. Hobby (HOU) delay statistics
- DAL to ATL, a related route78.1%
- ATL to HOU, a related route80.0%
- DAL to DEN, a related route70.2%
- Southwest Airlines on-time record74.8%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.05 million flight records
Direction matters. DAL to HOU and HOU to DAL 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.