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Route · HSV → IAH · 2020–2025 BTS data

Huntsville to Houston

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), HSV to IAH (Huntsville to Houston) ranks #4808 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

87.4%
On-time
+8.4 pts
vs US avg
80 min
Delay when late
603
Flights
#4808 of 4927
Corpus placement

Cancelled

4.6%

Best Month

May 2020 95%

Worst Month

Feb 2020 78%

Distance

595 mi

Carriers

8

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2022 31 4 0 0 OO
Sep 2020 54 7 0 0 EV,OO
Aug 2020 54 3 4 0 EV
Jul 2020 60 10 0 0 EV
Jun 2020 48 9 0 0 EV,YV
May 2020 57 3 3 0 EV,YV
Apr 2020 38 2 6 0 OO,EV,YV
Mar 2020 91 7 13 0 EV,YV,YX,OO
Feb 2020 82 18 1 0 YV,EV,OO,YX
Jan 2020 88 13 1 1 YV,OO,YX

HSV–IAH seasonal on-time pattern

Best: April (94.7%) · weakest: February (78.0%)

75%80%85%90%95%100% JanFebMarAprMayJunJulAugSepDec 87.1%

Strongest calendar month

April

94.7% on-time · ~38 flights/mo

Busiest calendar month

March

~91 flights/mo avg

Weakest calendar month

February

78.0% on-time · ~82 flights/mo

Cancellation Rate

4.6%

28 of 603 flights

Diversion Rate

0.2%

1 of 603 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

HSV - Huntsville

Full on-time, delay-cause, and seasonal performance for Huntsville, AL.

HSV on-time profile

IAH - Houston

Full on-time, delay-cause, and seasonal performance for Houston, TX.

IAH on-time profile

Compare the two airports

See HSV and IAH side by side on delays, cancellations, and reliability.

Compare HSV vs IAH

Origin-hub reliability standing

Among HSV's stronger departures

HSV → IAH posts a 87.4% on-time rate, landing in the ≥85% band with 2 of 7 BTS-tracked routes leaving Huntsville. The same hub also shows 5 mid-band and 0 challenged departures · fleet-wide on-time rank #534 of 4927 (highest on-time = #1).

What the Data Says About HSV to IAH

Huntsville to Houston (HSV to IAH) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 87.4% on-time rate across 603 flights, with delays that do happen averaging 79.8 minutes. The corridor runs roughly 595 miles and is served by 8 carriers. Over the most recent 24 months, 28 of 603 flights were cancelled (4.6%) and 1 diverted (0.2%).

The monthly split is wide on this route: May 2020 posted the strongest performance at 95% on-time, while Feb 2020 came in at just 78% - a 17-point swing worth factoring into travel timing.

On the multi-year calendar, HSV–IAH peaks in April at 94.7% on-time while March carries the heaviest traffic (~91 flights per month) ; the softest month is February at 78.0%, a 16.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does HSV to IAH rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, HSV to IAH ranks #4808 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from HSV to IAH? ▼
Flights from Huntsville to Houston have a 87.4% on-time rate based on 603 flights. The average delay is 79.8 minutes. The best recent month was May 2020 with 95% on-time.
What is the cancellation rate for HSV to IAH? ▼
Over the last 24 months, 4.6% of flights on this route were cancelled (28 of 603 flights) and 0.2% were diverted.
How far is the flight from HSV to IAH? ▼
The flight distance from Huntsville (HSV) to Houston (IAH) is approximately 595 miles. This route is served by 8 carriers.
When is the best time to fly from HSV to IAH? ▼
The best recent month for on-time performance was May 2020 (95% on-time). The worst was Feb 2020 (78% on-time). Consider booking during months with historically better performance.

Airports on this route

HSV Airport

Huntsville
IAH Airport

Houston
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using HSV–IAH data

HSV–IAH runs 8.4 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare HSV and IAH airport profiles: delay causes and top routes differ even on the same corridor. HSV airport
  • If your dates flex, April (94.7% on-time) beats February (78.0%) on this corridor. Seasonal chart
  • 4 other routes post a similar 87.4% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.