Carrier route record

F9LAS→SAT

Frontier Airlines · Las Vegas to San Antonio

Flights: 304
Period: September 2025 to August 2026
Share of route: 15%
Carriers: 3

Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Frontier Airlines.

Frontier on LAS to SAT lands a B+, 4 points better than the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 304 flights, with a median arrival 9 minutes early.

Set against the rest of the country, Frontier's LAS to SAT record is 4 points better than the US average of 77.3%. That gap is worth roughly 42 fewer late arrivals for every thousand flights.

On time

81.5%

Arrivals under 15 minutes late, of 302 completed flights

Avg delay

62 min

Across delayed arrivals only, not all flights

Cancelled

0.66%

National rate is 1.89%

Whole route

74.4%

Every carrier on LAS to SAT, 2,032 flights

These figures cover 304 flights between September 2025 and August 2026. The median arrival is 9 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

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Carrier by carrier

Frontier against every carrier on LAS to SAT

Frontier flew 304 of the 2,032 flights on LAS to SAT, about 15% of it. Its 81.5% on time is 7 points better than the route as a whole, which runs 74.4%. Ranked by on-time rate it is number two of three carriers on the route, where the range runs from Spirit at 83.5% to Southwest at 72.1%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on LAS to SAT
Airline	Flights	On time	Avg delay	Cancelled	Grade
Spirit Airlinesthin sample	159	83.5%	96 min	0.63%	B+
Frontier Airlines (this page)thin sample	304	81.5%	62 min	0.66%	B+
Southwest Airlines	1,569	72.1%	49 min	0.25%	C+

Flight by flight

Frontier flight numbers on LAS to SAT

F9 341815:4382.8% · 269 flights

Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.

Departure window

When Frontier runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 24 points, against half a point between the best and worst carrier.

5am–8am52 flights94.1%
8am–11am82 flights91.5%
11am–2pm9 flights—
2pm–5pm152 flights70.2%
5pm–8pm9 flights—
8pm–5am—

Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 94.1% of the time, against 70.2% for the afternoon window. That is 24 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 2pm–5pm window is the busiest, with 152 flights scheduled in it.

Across the year

Frontier on LAS to SAT through the year

Jul–Sep 202529 flights—
Oct–Dec 202572 flights91.7%
Jan–Mar 202662 flights79.0%
Apr–Jun 202679 flights77.9%
Jul–Sep 202662 flights71.0%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 81.5% on time across 304 flights.

Frontier on LAS to SAT did not run the same all year. Its best quarter was Oct–Dec 2025 at 91.7% on time and its weakest Jul–Sep 2026 at 71.0%, a swing of 21 points on roughly 76 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Across the week, Saturday is the strongest day at 94.1% on time and Monday the weakest at 75.0%, a spread of 19 points.

Arrival by arrival

How late Frontier on LAS to SAT runs when it is late

Frontier on LAS to SAT often beats the schedule: 97 of 302 completed flights, 32%, arrived 15 minutes or more early. The 56 late arrivals split 14 under half an hour, 21 between 30 and 60 minutes, and 21 an hour or more.

15+ min early97 flights32.1%
Within 15 min149 flights49.3%
15–29 min late14 flights4.6%
30–59 min late21 flights7.0%
1–2 hours late13 flights4.3%
2+ hours late8 flights2.6%

Scale runs 0% to 100%.

Share of 302 completed flights by arrival against schedule.

Time lost at the gate mostly stays lost. Of 51 departures that left 15 minutes late or more, only 5 made it up before arrival. 10 flights left on time and still arrived late.

The worst days

Worst days for Frontier on LAS to SAT

The latest arrival of the period was on 28 June 2026, 4 hours 13 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on four of the five worst days.

The latest arrivals of Frontier on LAS to SAT in the period
Date	Arrived late by	Largest filed cause
28 June 2026	4 hours 13 minutes	Late-arriving aircraft
31 July 2026	3 hours 33 minutes	Late-arriving aircraft
23 July 2026	2 hours 52 minutes	Late-arriving aircraft
21 June 2026	2 hours 27 minutes	Late-arriving aircraft
26 January 2026	2 hours 18 minutes	Carrier

Delay causes

Why Frontier runs late on this route

Late-arriving aircraft accounts for 48% of the 3,480 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
48%
Carrier
35%
National Airspace System
15%
Extreme weather
1%

48% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 3,480 reported delay minutes here, that single category outweighs weather by 33 to one. The split is drawn from 3,480 reported delay minutes.

The largest share of delay minutes, 35%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,234 of the 3,480 delay minutes reported here.

Cancellations are rare at 0.66%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and stage length

What a delay here costs

7.0% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

The 1,069 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.

The return leg is a different operation and performs like one: it runs 74.8% on time across 305 flights, 7 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 7 points of difference.

One caution: this is a thin sample. 304 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking Frontier on LAS to SAT

Put together: treat all of this as provisional. 304 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 81.5% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 302 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures