Route reliability record
SHV→IAH
Shreveport to Houston
- Flights
- 1,205
- Period
- July 2025 to June 2026
- Distance
- 192 mi
- Carriers
- 1
This route lands a B, 2 points worse than the national rate of 77.6%. About one flight in four arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 1,205 SHV to IAH flights, with a median arrival 6 minutes early.
Best time to fly SHV to IAH: a 5am–8am departure, ideally on a Tuesday. Flights in that window arrived on time 82.7% of the time and Tuesday flights 81.7%, against 76.1% for the route overall.
The US average over the same twelve months is 77.6%, 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
76.1%
Arrivals under 15 minutes late, of 1,189 completed flights
Avg delay
88 min
Across delayed arrivals only, not all flights
Cancelled
1.24%
National rate is 1.81%
Best carrier
SkyWest
76.1% on time across 1,205 flights
These figures cover 1,205 flights between July 2025 and June 2026. Beyond the headline rate, 9.0% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
Which airline is most reliable on SHV to IAH
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 Airlines | 1,205 | 76.1% | 88 min | 1.24% | B |
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 18 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–8am648 flights82.7%
- 8am–11am121 flights77.6%
- 11am–2pm117 flights65.5%
- 2pm–5pm211 flights66.7%
- 5pm–8pm108 flights65.1%
- 8pm–5am—
Scale runs 55% to 90%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 82.7% of the time, against 65.1% for the evening window. That is 18 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 648 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 23 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 65.0%. February is the strongest month at 87.7%. Moving a flexible trip across that boundary buys 23 points. July was the busiest month here, with 150 flights.
Across the week, Tuesday is the strongest day at 81.7% on time and Friday the weakest at 72.6%. 9 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
One category carries most of the weight here. Carrier accounts for 57% of the 25,000 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.
- 57%Carrier
- 21%Late-arriving aircraft
- 15%National Airspace System
- 7%Extreme weather
The largest share of delay minutes, 57%, 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 14,000 of the 25,000 delay minutes reported here. The split is drawn from 25,107 reported delay minutes.
Cancellations sit at 1.24% against a national 1.81%, which is ordinary. Diversions add another 0.08%.
Connections and stage length
What a delay here actually costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.0% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
At 192 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 runs 74.6% on time across 1,206 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 1,205 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 IAH 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. February runs 87.7% on time and March 65.0%, a swing of 23 points. If the dates move at all, move them out of March before you think about anything else. 1,189 completed flights over 12 months sit behind that.
Common questions
SHV to IAH questions
How often is SHV to IAH 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 23.9% of the 1,205 flights in this analysis, against 22.4% nationally. Delayed flights are late by an hour and a half on average.
How reliable is SHV to IAH compared with the rest of the country?
76.1% of flights arrive on time here against a national 77.6%, a difference of 2 points against it. That is worth a B on this site's grading scale.
What time of day has the fewest delays on SHV to IAH?
The 5am–8am departure window is the strongest at 82.7% on time. The 5pm–8pm window is the weakest at 65.1%, 18 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 SHV to IAH?
March is the weakest month at 65.0% on time, compared with 87.7% in February. Across the year that is 23 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
- IAH to SHV — the return legseparate record
- George Bush Intercontinental (IAH) delay statistics
- SHV to DFW, a related route75.3%
- ORD to IAH, a related route75.0%
- SHV to ATL, a related route83.5%
- SkyWest Airlines on-time record76.1%
- The best time of day to fly, according to 7.04 million flight records
- How often a connection fails at the major US hubs
Direction matters. SHV to IAH and IAH to SHV 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.