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Route · SLC → IAH · 2020–2025 BTS data

Salt Lake City to Houston

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SLC to IAH (Salt Lake City to Houston) ranks #822 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

82.7%
On-time
+3.7 pts
vs US avg
77 min
Delay when late
12,780
Flights
#822 of 4927
Corpus placement

Cancelled

1.1%

Best Month

Feb 2024 94%

Worst Month

Jul 2025 71%

Distance

1,195 mi

Carriers

20

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 184 21 2 0 DL,UA
Nov 2025 137 19 0 0 OO,UA,DL
Oct 2025 146 16 1 0 OO,UA,DL
Sep 2025 161 14 0 0 UA,DL
Aug 2025 160 36 1 1 OO,UA,DL
Jul 2025 154 44 1 3 DL,OO,UA
Jun 2025 150 28 2 1 DL,OO,UA
May 2025 149 33 0 1 DL,UA
Apr 2025 176 29 0 0 DL,UA
Mar 2025 207 32 0 0 DL,OO,UA
Feb 2025 174 30 0 0 OO,UA,DL
Jan 2025 179 26 8 1 OO,UA,DL
Dec 2024 172 38 1 2 DL,OO,UA
Nov 2024 136 25 1 1 OO,UA,DL
Oct 2024 170 16 0 1 UA,OO,DL
Sep 2024 173 21 1 0 UA,DL
Aug 2024 160 25 3 0 DL,OO,UA
Jul 2024 152 34 12 0 DL,OO,UA
Jun 2024 152 35 1 1 DL,OO,UA
May 2024 151 35 5 2 DL,OO,UA
Apr 2024 150 32 0 1 DL,OO,UA
Mar 2024 210 38 1 0 DL,OO,UA
Feb 2024 177 11 0 0 DL,OO,UA
Jan 2024 185 40 5 2 DL,OO,UA

SLC–IAH seasonal on-time pattern

Best: September (88.5%) · weakest: July (77.2%)

75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 79.8%

Strongest calendar month

September

88.5% on-time · ~177 flights/mo

Busiest calendar month

March

~223 flights/mo avg

Weakest calendar month

July

77.2% on-time · ~180 flights/mo

Cancellation Rate

1.1%

45 of 3,965 flights

Diversion Rate

0.4%

17 of 3,965 flights

Explore origin & destination

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

SLC - Salt Lake City

Full on-time, delay-cause, and seasonal performance for Salt Lake City, UT.

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

Compare SLC vs IAH

Origin-hub reliability standing

Mid-pack among SLC departures

From SLC, this corridor sits with 31 other 75–85% on-time routes out of 85 tracked departures, not the hub's reliability leaders (54 at ≥85%) and not the softest ( 0 below 75%). Destination: Houston · fleet on-time rank #2088 of 4927.

What the Data Says About SLC to IAH

Bureau of Transportation Statistics records show Salt Lake City to Houston (SLC to IAH) running a 82.7% on-time rate over 12,780 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 77.3 minutes. The 1,195-mile corridor is served by 20 carriers, and over the last 24 months 1.1% of 3,965 flights were cancelled, 0.4% diverted.

The monthly split is wide on this route: Feb 2024 posted the strongest performance at 94% on-time, while Jul 2025 came in at just 71% - a 22-point swing worth factoring into travel timing.

On the multi-year calendar, SLC–IAH peaks in September at 88.5% on-time while March carries the heaviest traffic (~223 flights per month) ; the softest month is July at 77.2%, a 11.3-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SLC to IAH rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SLC to IAH ranks #822 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 SLC to IAH? ▼
Flights from Salt Lake City to Houston have a 82.7% on-time rate based on 12,780 flights. The average delay is 77.3 minutes. The best recent month was Feb 2024 with 94% on-time.
What is the cancellation rate for SLC to IAH? ▼
Over the last 24 months, 1.1% of flights on this route were cancelled (45 of 3,965 flights) and 0.4% were diverted.
How far is the flight from SLC to IAH? ▼
The flight distance from Salt Lake City (SLC) to Houston (IAH) is approximately 1,195 miles. This route is served by 20 carriers.
When is the best time to fly from SLC to IAH? ▼
The best recent month for on-time performance was Feb 2024 (94% on-time). The worst was Jul 2025 (71% on-time). Consider booking during months with historically better performance.

Airports on this route

SLC Airport

Salt Lake City
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 SLC–IAH data

SLC–IAH runs 3.7 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare SLC and IAH airport profiles: delay causes and top routes differ even on the same corridor. SLC airport
  • If your dates flex, September (88.5% on-time) beats July (77.2%) on this corridor. Seasonal chart
  • 4 other routes post a similar 82.7% 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.