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Route · SLC → SAT · 2020–2025 BTS data

Salt Lake City to San Antonio

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SLC to SAT (Salt Lake City to San Antonio) ranks #2086 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

84.1%
On-time
+5.1 pts
vs US avg
66 min
Delay when late
5,968
Flights
#2086 of 4927
Corpus placement

Cancelled

0.7%

Best Month

Oct 2025 93%

Worst Month

Jul 2024 68%

Distance

1,087 mi

Carriers

4

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 87 12 3 0 DL
Nov 2025 78 13 1 0 DL
Oct 2025 84 6 0 0 DL
Sep 2025 77 12 1 0 DL
Aug 2025 82 11 0 0 DL
Jul 2025 88 24 0 0 DL
Jun 2025 86 13 1 2 OO,DL
May 2025 87 13 0 0 DL
Apr 2025 86 21 0 0 DL
Mar 2025 88 10 0 0 DL
Feb 2025 74 13 0 0 DL
Jan 2025 82 15 2 0 DL
Dec 2024 88 22 0 0 DL
Nov 2024 78 11 0 1 DL
Oct 2024 83 9 0 1 DL
Sep 2024 80 9 0 0 DL
Aug 2024 92 18 1 0 DL
Jul 2024 91 29 5 0 DL
Jun 2024 89 18 0 0 DL
May 2024 88 19 0 0 DL
Apr 2024 87 12 0 0 DL
Mar 2024 88 18 0 1 DL
Feb 2024 78 14 0 1 DL
Jan 2024 87 15 0 0 DL

SLC–SAT seasonal on-time pattern

Best: September (87.8%) · weakest: July (77.1%)

75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 79.7%

Strongest calendar month

September

87.8% on-time · ~83 flights/mo

Busiest calendar month

August

~90 flights/mo avg

Weakest calendar month

July

77.1% on-time · ~85 flights/mo

Cancellation Rate

0.7%

14 of 2,028 flights

Diversion Rate

0.3%

6 of 2,028 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

SAT - San Antonio

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

SAT on-time profile

Compare the two airports

See SLC and SAT side by side on delays, cancellations, and reliability.

Compare SLC vs SAT

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: San Antonio · fleet on-time rank #1556 of 4927.

What the Data Says About SLC to SAT

Bureau of Transportation Statistics records show Salt Lake City to San Antonio (SLC to SAT) running a 84.1% on-time rate over 5,968 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 65.6 minutes. The 1,087-mile corridor is served by 4 carriers, and over the last 24 months 0.7% of 2,028 flights were cancelled, 0.3% diverted.

The monthly split is wide on this route: Oct 2025 posted the strongest performance at 93% on-time, while Jul 2024 came in at just 68% - a 25-point swing worth factoring into travel timing.

On the multi-year calendar, SLC–SAT peaks in September at 87.8% on-time while August carries the heaviest traffic (~90 flights per month) ; the softest month is July at 77.1%, a 10.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SLC to SAT rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SLC to SAT ranks #2086 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 SAT? ▼
Flights from Salt Lake City to San Antonio have a 84.1% on-time rate based on 5,968 flights. The average delay is 65.6 minutes. The best recent month was Oct 2025 with 93% on-time.
What is the cancellation rate for SLC to SAT? ▼
Over the last 24 months, 0.7% of flights on this route were cancelled (14 of 2,028 flights) and 0.3% were diverted.
How far is the flight from SLC to SAT? ▼
The flight distance from Salt Lake City (SLC) to San Antonio (SAT) is approximately 1,087 miles. This route is served by 4 carriers.
When is the best time to fly from SLC to SAT? ▼
The best recent month for on-time performance was Oct 2025 (93% on-time). The worst was Jul 2024 (68% on-time). Consider booking during months with historically better performance.

Airports on this route

SLC Airport

Salt Lake City
SAT Airport

San Antonio
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–SAT data

SLC–SAT runs 5.1 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 SAT airport profiles: delay causes and top routes differ even on the same corridor. SLC airport
  • If your dates flex, September (87.8% on-time) beats July (77.1%) on this corridor. Seasonal chart
  • 4 other routes post a similar 84.1% 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.