Route reliability record
IAH→SHV
Houston to Shreveport
- Flights
- 1,206
- Period
- July 2025 to June 2026
- Distance
- 192 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 77.6%. The late ones land a little over an hour behind schedule. That rests on 1,206 IAH to SHV flights, with a median arrival 5 minutes early.
Best time to fly IAH to SHV: a 8pm–5am departure, ideally on a Tuesday. Flights in that window arrived on time 77.4% of the time and Tuesday flights 82.5%, against 74.6% 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
74.6%
Arrivals under 15 minutes late, of 1,190 completed flights
Avg delay
81 min
Across delayed arrivals only, not all flights
Cancelled
1.33%
National rate is 1.81%
Best carrier
SkyWest
74.6% on time across 1,206 flights
These figures cover 1,206 flights between July 2025 and June 2026. Beyond the headline rate, 9.4% 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 IAH to SHV
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 | 1,206 | 74.6% | 81 min | 1.33% | C |
Departure window
The best time of day to leave
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 1,206 flights.
- 5am–8am—
- 8am–11am117 flights73.5%
- 11am–2pm1 flights—
- 2pm–5pm464 flights73.9%
- 5pm–8pm223 flights71.7%
- 8pm–5am401 flights77.4%
Scale runs 65% to 85%. Rows with fewer than 30 flights show a dash.
The overnight block holds up unusually well at 77.4% on time across 401 flights. Red-eyes fly into empty airspace and empty gates, and they are the first rotation of the aircraft's day rather than the last. The 2pm–5pm window is the busiest, with 464 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 20 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.
June is the worst month at 65.2% on time, 20 points below November, the best at 85.2%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. July was the busiest month here, with 150 flights.
Across the week, Tuesday is the strongest day at 82.5% on time and Sunday the weakest at 68.6%. 14 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 46% of the 24,000 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.
- 46%Carrier
- 30%Late-arriving aircraft
- 15%National Airspace System
- 8%Extreme weather
The largest share of delay minutes, 46%, 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 11,000 of the 24,000 delay minutes reported here. The split is drawn from 24,474 reported delay minutes.
Cancellations sit at 1.33% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
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. 9.4% 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 8pm–5am window matters as much as it does.
The return leg runs 76.1% on time across 1,205 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 1,206 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 SHV 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. November runs 85.2% on time and June 65.2%, a swing of 20 points. If the dates move at all, move them out of June before you think about anything else. 1,190 completed flights over 12 months sit behind that.
Common questions
IAH to SHV questions
How often is IAH to SHV 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 25.4% of the 1,206 flights in this analysis, against 22.4% nationally. Delayed flights are late by a little over an hour on average.
How reliable is IAH to SHV compared with the rest of the country?
74.6% of flights arrive on time here against a national 77.6%, 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 IAH to SHV?
The 8pm–5am departure window is the strongest at 77.4% on time. The 5pm–8pm window is the weakest at 71.7%, 6 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 June delays on IAH to SHV?
June is the weakest month at 65.2% on time, compared with 85.2% in November. Across the year that is 20 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
- SHV to IAH — the return legseparate record
- George Bush Intercontinental (IAH) delay statistics
- IAH to ORD, a related route74.8%
- DFW to SHV, a related route76.0%
- IAH to DFW, a related route75.0%
- SkyWest Airlines on-time record74.6%
- How often a connection fails at the major US hubs
- Connecting flights: how much buffer the data says you need
Direction matters. IAH to SHV and SHV to IAH 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.