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Route · TYS → IAH · 2020–2025 BTS data

Knoxville to Houston

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), TYS to IAH (Knoxville to Houston) ranks #4847 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

92.3%
On-time
+13.3 pts
vs US avg
71 min
Delay when late
561
Flights
#4847 of 4927
Corpus placement

Cancelled

4.8%

Best Month

Mar 2020 97%

Worst Month

Jan 2020 87%

Distance

771 mi

Carriers

4

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Oct 2020 31 4 0 1 YV,OO
Sep 2020 86 5 0 0 EV
Aug 2020 59 2 3 0 EV
Jul 2020 31 3 0 0 EV
Jun 2020 30 4 0 0 EV
May 2020 31 4 0 0 EV
Apr 2020 36 2 8 0 EV
Mar 2020 89 3 15 0 EV,YV
Feb 2020 81 5 0 1 YV,EV
Jan 2020 87 11 1 1 EV,YV

TYS–IAH seasonal on-time pattern

Best: March (96.6%) · weakest: June (86.7%)

85%90%95%100% JanFebMarAprMayJunJulAugSepOct 87.1%

Strongest calendar month

March

96.6% on-time · ~89 flights/mo

Busiest calendar month

March

~89 flights/mo avg

Weakest calendar month

June

86.7% on-time · ~30 flights/mo

Cancellation Rate

4.8%

27 of 561 flights

Diversion Rate

0.5%

3 of 561 flights

Explore origin & destination

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

TYS - Knoxville

Full on-time, delay-cause, and seasonal performance for Knoxville, TN.

TYS 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 TYS and IAH side by side on delays, cancellations, and reliability.

Compare TYS vs IAH

Origin-hub reliability standing

Among TYS's stronger departures

TYS → IAH posts a 92.3% on-time rate, landing in the ≥85% band with 6 of 14 BTS-tracked routes leaving Knoxville. The same hub also shows 6 mid-band and 2 challenged departures · fleet-wide on-time rank #38 of 4927 (highest on-time = #1).

What the Data Says About TYS to IAH

Knoxville to Houston (TYS to IAH) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 92.3% on-time rate across 561 flights, with delays that do happen averaging 70.9 minutes. The corridor runs roughly 771 miles and is served by 4 carriers. Over the most recent 24 months, 27 of 561 flights were cancelled (4.8%) and 3 diverted (0.5%).

Monthly performance varies moderately here: Mar 2020 was the strongest month at 97% on-time versus Jan 2020 at 87%, a 9-point difference.

On the multi-year calendar, TYS–IAH peaks in March at 96.6% on-time ; the softest month is June at 86.7%, a 9.9-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does TYS to IAH rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, TYS to IAH ranks #4847 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 TYS to IAH? ▼
Flights from Knoxville to Houston have a 92.3% on-time rate based on 561 flights. The average delay is 70.9 minutes. The best recent month was Mar 2020 with 97% on-time.
What is the cancellation rate for TYS to IAH? ▼
Over the last 24 months, 4.8% of flights on this route were cancelled (27 of 561 flights) and 0.5% were diverted.
How far is the flight from TYS to IAH? ▼
The flight distance from Knoxville (TYS) to Houston (IAH) is approximately 771 miles. This route is served by 4 carriers.
When is the best time to fly from TYS to IAH? ▼
The best recent month for on-time performance was Mar 2020 (97% on-time). The worst was Jan 2020 (87% on-time). Consider booking during months with historically better performance.

Airports on this route

TYS Airport

Knoxville
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 TYS–IAH data

TYS–IAH runs 13.3 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare TYS and IAH airport profiles: delay causes and top routes differ even on the same corridor. TYS airport
  • If your dates flex, March (96.6% on-time) beats June (86.7%) on this corridor. Seasonal chart
  • 4 other routes post a similar 92.3% 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.