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Route · DEN → SAT · 2020–2025 BTS data

Denver to San Antonio

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), DEN to SAT (Denver to San Antonio) ranks #520 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

78.2%
On-time
-0.8 pts
vs US avg
62 min
Delay when late
16,430
Flights
#520 of 4927
Corpus placement

Cancelled

0.7%

Best Month

Dec 2024 90%

Worst Month

Jul 2025 58%

Distance

794 mi

Carriers

19

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 282 67 1 0 WN,F9,UA,OO
Nov 2025 243 30 1 0 UA,F9,WN
Oct 2025 252 42 0 0 UA,WN,F9
Sep 2025 220 40 0 0 UA,WN,F9
Aug 2025 239 58 2 2 WN,F9,UA
Jul 2025 278 118 0 0 UA,WN,F9
Jun 2025 267 101 1 4 UA,WN,F9
May 2025 273 70 4 1 OO,UA,WN,F9
Apr 2025 236 62 0 0 F9,UA,WN
Mar 2025 268 40 0 1 UA,WN,F9
Feb 2025 198 35 0 1 UA,WN,F9
Jan 2025 226 63 3 0 UA,WN,F9
Dec 2024 264 27 0 0 F9,UA,WN
Nov 2024 264 52 0 0 UA,WN,F9
Oct 2024 276 35 0 0 UA,WN,F9
Sep 2024 257 34 0 0 WN,UA,F9
Aug 2024 272 82 3 0 F9,WN,UA
Jul 2024 302 83 3 3 F9,UA,WN
Jun 2024 291 76 3 0 F9,UA,WN
May 2024 276 68 2 0 F9,UA,WN
Apr 2024 269 60 0 1 F9,UA,WN
Mar 2024 273 64 4 1 F9,UA,WN
Feb 2024 229 49 0 1 F9,UA,WN
Jan 2024 251 59 16 0 F9,WN,UA

DEN–SAT seasonal on-time pattern

Best: November (84.7%) · weakest: July (67.7%)

65%70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 79.1%

Strongest calendar month

November

84.7% on-time · ~237 flights/mo

Busiest calendar month

July

~246 flights/mo avg

Weakest calendar month

July

67.7% on-time · ~246 flights/mo

Cancellation Rate

0.7%

43 of 6,206 flights

Diversion Rate

0.2%

15 of 6,206 flights

Explore origin & destination

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

DEN - Denver

Full on-time, delay-cause, and seasonal performance for Denver, CO.

DEN 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 DEN and SAT side by side on delays, cancellations, and reliability.

Compare DEN vs SAT

Origin-hub reliability standing

Mid-pack among DEN departures

From DEN, this corridor sits with 133 other 75–85% on-time routes out of 168 tracked departures, not the hub's reliability leaders (8 at ≥85%) and not the softest ( 27 below 75%). Destination: San Antonio · fleet on-time rank #3773 of 4927.

What the Data Says About DEN to SAT

The Denver to San Antonio corridor (DEN to SAT) posts a 78.2% on-time rate on the lower edge of the average band, based on 16,430 tracked flights. Late flights run 62.1 minutes behind on average. 19 carriers cover the 794-mile route; over the last 24 months, 43 of 6,206 flights were cancelled (0.7%) and 0.2% diverted.

The monthly split is wide on this route: Dec 2024 posted the strongest performance at 90% on-time, while Jul 2025 came in at just 58% - a 32-point swing worth factoring into travel timing.

On the multi-year calendar, DEN–SAT peaks in November at 84.7% on-time while July carries the heaviest traffic (~246 flights per month) ; the softest month is July at 67.7%, a 17.0-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does DEN to SAT rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, DEN to SAT ranks #520 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 DEN to SAT? ▼
Flights from Denver to San Antonio have a 78.2% on-time rate based on 16,430 flights. The average delay is 62.1 minutes. The best recent month was Dec 2024 with 90% on-time.
What is the cancellation rate for DEN to SAT? ▼
Over the last 24 months, 0.7% of flights on this route were cancelled (43 of 6,206 flights) and 0.2% were diverted.
How far is the flight from DEN to SAT? ▼
The flight distance from Denver (DEN) to San Antonio (SAT) is approximately 794 miles. This route is served by 19 carriers.
When is the best time to fly from DEN to SAT? ▼
The best recent month for on-time performance was Dec 2024 (90% on-time). The worst was Jul 2025 (58% on-time). Consider booking during months with historically better performance.

Airports on this route

DEN Airport

Denver
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 DEN–SAT data

DEN–SAT is mid-pack at 78.2% on-time; month and carrier mix move more than the corridor headline.

  • Compare DEN and SAT airport profiles: delay causes and top routes differ even on the same corridor. DEN airport
  • If your dates flex, November (84.7% on-time) beats July (67.7%) on this corridor. Seasonal chart
  • 4 other routes post a similar 78.2% 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.