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Route · IAH → HSV · 2020–2025 BTS data

Houston to Huntsville

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), IAH to HSV (Houston to Huntsville) ranks #4807 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

87.7%
On-time
+8.7 pts
vs US avg
69 min
Delay when late
604
Flights
#4807 of 4927
Corpus placement

Cancelled

6.0%

Best Month

Aug 2020 98%

Worst Month

Jan 2020 78%

Distance

595 mi

Carriers

9

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2022 31 7 0 0 OO
Sep 2020 53 6 0 0 EV,OO
Aug 2020 54 1 4 0 EV
Jul 2020 60 6 0 0 EV
Jun 2020 48 3 0 0 EV,YV
May 2020 59 6 3 0 EV,OO,YV
Apr 2020 37 1 8 0 OO,EV
Mar 2020 92 9 19 0 EV,YV,YX,OO
Feb 2020 82 16 0 1 YV,EV,OO
Jan 2020 88 19 2 0 YV,OO,EV

IAH–HSV seasonal on-time pattern

Best: August (98.1%) · weakest: December (77.4%)

75%80%85%90%95%100% JanFebMarAprMayJunJulAugSepDec 77.4%

Strongest calendar month

August

98.1% on-time · ~54 flights/mo

Busiest calendar month

March

~92 flights/mo avg

Weakest calendar month

December

77.4% on-time · ~31 flights/mo

Cancellation Rate

6.0%

36 of 604 flights

Diversion Rate

0.2%

1 of 604 flights

Explore origin & destination

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

IAH - Houston

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

IAH on-time profile

HSV - Huntsville

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

HSV on-time profile

Compare the two airports

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

Compare IAH vs HSV

Origin-hub reliability standing

Among IAH's stronger departures

IAH → HSV posts a 87.7% on-time rate, landing in the ≥85% band with 17 of 102 BTS-tracked routes leaving Houston. The same hub also shows 79 mid-band and 6 challenged departures · fleet-wide on-time rank #478 of 4927 (highest on-time = #1).

What the Data Says About IAH to HSV

Houston to Huntsville (IAH to HSV) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 87.7% on-time rate across 604 flights, with delays that do happen averaging 68.9 minutes. The corridor runs roughly 595 miles and is served by 9 carriers. Over the most recent 24 months, 36 of 604 flights were cancelled (6.0%) and 1 diverted (0.2%).

The monthly split is wide on this route: Aug 2020 posted the strongest performance at 98% on-time, while Jan 2020 came in at just 78% - a 20-point swing worth factoring into travel timing.

On the multi-year calendar, IAH–HSV peaks in August at 98.1% on-time while March carries the heaviest traffic (~92 flights per month) ; the softest month is December at 77.4%, a 20.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does IAH to HSV rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, IAH to HSV ranks #4807 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 IAH to HSV? ▼
Flights from Houston to Huntsville have a 87.7% on-time rate based on 604 flights. The average delay is 68.9 minutes. The best recent month was Aug 2020 with 98% on-time.
What is the cancellation rate for IAH to HSV? ▼
Over the last 24 months, 6.0% of flights on this route were cancelled (36 of 604 flights) and 0.2% were diverted.
How far is the flight from IAH to HSV? ▼
The flight distance from Houston (IAH) to Huntsville (HSV) is approximately 595 miles. This route is served by 9 carriers.
When is the best time to fly from IAH to HSV? ▼
The best recent month for on-time performance was Aug 2020 (98% on-time). The worst was Jan 2020 (78% on-time). Consider booking during months with historically better performance.

Airports on this route

IAH Airport

Houston
HSV Airport

Huntsville
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 IAH–HSV data

IAH–HSV runs 8.7 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare IAH and HSV airport profiles: delay causes and top routes differ even on the same corridor. IAH airport
  • If your dates flex, August (98.1% on-time) beats December (77.4%) on this corridor. Seasonal chart
  • 4 other routes post a similar 87.7% 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.