Carrier route record

F9DFW→SLC

Frontier Airlines · Dallas-Fort Worth to Salt Lake City

Flights: 201
Period: September 2025 to August 2026
Share of route: 5%
Carriers: 4

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

Frontier on DFW to SLC earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 201 flights. The strongest carrier on the route with a full sample, Delta Air Lines, flew 1,459 at 83.1% on time.

Set against the rest of the country, Frontier's DFW to SLC record is 8 points better than the US average of 77.3%. That gap is worth roughly 75 fewer late arrivals for every thousand flights.

On time

84.8%

Arrivals under 15 minutes late, of 197 completed flights

Avg delay

70 min

Across delayed arrivals only, not all flights

Cancelled

1.99%

National rate is 1.89%

Whole route

71.1%

Every carrier on DFW to SLC, 3,872 flights

These figures cover 201 flights between September 2025 and August 2026. The median arrival is 11 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 DFW to SLC

Frontier flew 201 of the 3,872 flights on DFW to SLC, about 5% of it. Its 84.8% on time is 14 points better than the route as a whole, which runs 71.1%. Ranked by on-time rate it is first of four carriers on the route, where the range runs from Frontier at 84.8% to Envoy at 55.6%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 83.1% of the time; American Airlines manages 61.7%. Sample sizes sit next to every figure, because a two-point gap across 2,203 flights means less than a ten-point one.

On-time performance by carrier on DFW to SLC
Airline	Flights	On time	Avg delay	Cancelled	Grade
Frontier Airlines (this page)thin sample	201	84.8%	70 min	1.99%	B
Delta Air Lines	1,459	83.1%	87 min	1.44%	B
American Airlines	2,203	61.7%	65 min	2.68%	D
Envoy Airthin sample	9	55.6%	37 min	0.00%	D+

The spread between Delta and American is 21 points, wide enough that it should decide the booking. On a hundred trips that is 21 more arrivals inside the on-time window.

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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 13 points, against 21 points between the best and worst carrier.

5am–8am27 flights—
8am–11am26 flights—
11am–2pm30 flights76.7%
2pm–5pm47 flights89.4%
5pm–8pm71 flights78.3%
8pm–5am—

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

The weak window here is the middle of the day, not the evening: 11am–2pm runs 76.7% on time against 89.4% for 2pm–5pm. That shape usually means a departure bank rather than an accumulating delay, so the recovery later in the afternoon is real rather than noise. The 5pm–8pm window is the busiest, with 71 flights scheduled in it.

Across the year

Frontier on DFW to SLC through the year

Jul–Sep 20258 flights—
Oct–Dec 202541 flights87.2%
Jan–Mar 202654 flights88.9%
Apr–Jun 202665 flights85.9%
Jul–Sep 202633 flights71.9%

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 84.8% on time across 201 flights.

Frontier on DFW to SLC did not run the same all year. Its best quarter was Jan–Mar 2026 at 88.9% on time and its weakest Jul–Sep 2026 at 71.9%, a swing of 17 points on roughly 50 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.

Arrival by arrival

How late Frontier on DFW to SLC runs when it is late

Frontier on DFW to SLC often beats the schedule: 78 of 197 completed flights, 40%, arrived 15 minutes or more early. The 30 late arrivals split 8 under half an hour, 9 between 30 and 60 minutes, and 13 an hour or more.

15+ min early78 flights39.6%
Within 15 min89 flights45.2%
15–29 min late8 flights4.1%
30–59 min late9 flights4.6%
1–2 hours late8 flights4.1%
2+ hours late5 flights2.5%

Scale runs 0% to 100%.

Share of 197 completed flights by arrival against schedule.

A late pushback is often recovered here: of 38 departures that left 15 minutes late or more, 12 still arrived on time. 4 flights left on time and still arrived late.

The worst days

Worst days for Frontier on DFW to SLC

The latest arrival of the period was on 24 August 2026, 3 hours 8 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 DFW to SLC in the period
Date	Arrived late by	Largest filed cause
24 August 2026	3 hours 8 minutes	Late-arriving aircraft
13 November 2025	2 hours 51 minutes	Late-arriving aircraft
19 June 2026	2 hours 31 minutes	Late-arriving aircraft
14 August 2026	2 hours 16 minutes	Late-arriving aircraft
25 January 2026	2 hours 7 minutes	National Airspace System

Delay causes

Why Frontier runs late on this route

Late-arriving aircraft accounts for 59% of the 2,099 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
59%
National Airspace System
24%
Carrier
15%
Extreme weather
2%

59% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,099 reported delay minutes here, that single category outweighs weather by 24 to one. The split is drawn from 2,099 reported delay minutes.

Cancellations sit at 1.99% against a national 1.89%, which is ordinary. Diversions add another 0.00%.

Connections and stage length

What a delay here costs

6.6% 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 a little over an hour, which a normal layover absorbs.

The 989 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 78.1% on time across 201 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. 201 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 DFW to SLC

Put together: treat all of this as provisional. 201 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 84.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 197 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