Carrier route record
DLSLC→DFW
Delta Air Lines · Salt Lake City to Dallas-Fort Worth
- Flights
- 1,458
- Period
- September 2025 to August 2026
- Share of route
- 38%
- Carriers
- 4
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on SLC to DFW 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 1,458 flights, with a median arrival 7 minutes early.
Set against the rest of the country, Delta's SLC to DFW record is 4 points better than the US average of 77.3%. That gap is worth roughly 43 fewer late arrivals for every thousand flights.
Key figures
On time
81.6%
Arrivals under 15 minutes late, of 1,424 completed flights
Avg delay
64 min
Across delayed arrivals only, not all flights
Cancelled
1.23%
National rate is 1.89%
Whole route
79.8%
Every carrier on SLC to DFW, 3,870 flights
These figures cover 1,458 flights between September 2025 and August 2026. The median arrival is 7 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
Delta against every carrier on SLC to DFW
Delta flew 1,458 of the 3,870 flights on SLC to DFW, about 38% of it. Its 81.6% on time is 2 points better than the route as a whole, which runs 79.8%. Ranked by on-time rate it is first of four carriers on the route, where the range runs from Delta at 81.6% to Envoy at 77.8%. Two 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.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines (this page) | 1,458 | 81.6% | 64 min | 1.23% | B |
| American Airlines | 2,202 | 78.7% | 105 min | 2.82% | B |
| Frontier Airlinesthin sample | 201 | 78.1% | 67 min | 2.49% | B |
| Envoy Airthin sample | 9 | 77.8% | 46 min | 0.00% | B+ |
Flight by flight
Delta flight numbers on SLC to DFW
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 Delta 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 half a point between the best and worst carrier.
- 5am–8am209 flights85.2%
- 8am–11am464 flights86.0%
- 11am–2pm268 flights81.2%
- 2pm–5pm152 flights73.0%
- 5pm–8pm365 flights77.9%
- 8pm–5am—
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 86.0% of the time, against 73.0% for the afternoon window. That is 13 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 464 flights scheduled in it.
Across the year
Delta on SLC to DFW through the year
July is the worst month at 71.3% on time, 20 points below February, the best at 91.0%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. March was the busiest month here, with 124 flights.
Across the week, Wednesday is the strongest day at 90.8% on time and Sunday the weakest at 72.9%, a spread of 18 points.
Arrival by arrival
How late Delta on SLC to DFW runs when it is late
Delta on SLC to DFW often beats the schedule: 407 of 1,424 completed flights, 29%, arrived 15 minutes or more early. The 262 late arrivals split 106 under half an hour, 75 between 30 and 60 minutes, and 81 an hour or more.
- 15+ min early407 flights28.6%
- Within 15 min755 flights53.0%
- 15–29 min late106 flights7.4%
- 30–59 min late75 flights5.3%
- 1–2 hours late47 flights3.3%
- 2+ hours late34 flights2.4%
Scale runs 0% to 100%.
Share of 1,424 completed flights by arrival against schedule.
42 of 239 late departures made up the time and arrived on time, 18% of them. 65 flights left on time and still arrived late.
The worst days
Worst days for Delta on SLC to DFW
The latest arrival of the period was on 19 May 2026, 17 hours 58 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 19 May 2026 | 17 hours 58 minutes | National Airspace System |
| 18 February 2026 | 5 hours 20 minutes | Late-arriving aircraft |
| 2 April 2026 | 5 hours 1 minute | Late-arriving aircraft |
| 19 April 2026 | 4 hours 49 minutes | Carrier |
| 13 February 2026 | 4 hours 45 minutes | Late-arriving aircraft |
Delay causes
Why Delta runs late on this route
Carrier accounts for 45% of the 17,000 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Carrier
- 26%National Airspace System
- 26%Late-arriving aircraft
- 3%Extreme weather
The largest share of delay minutes, 45%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 7,588 of the 17,000 delay minutes reported here. The split is drawn from 16,824 reported delay minutes.
Cancellations sit at 1.23% against a national 1.89%, which is ordinary. Diversions add another 1.10%.
Connections and stage length
What a delay here costs
5.7% 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 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 runs 83.1% on time across 1,459 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.
The sample behind these figures is 1,458 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking Delta on SLC to DFW
Put together: the calendar is the biggest lever here, not the carrier or the hour. February runs 91.0% on time and July 71.3%, a swing of 20 points. If the dates move at all, move them out of July before you think about anything else. 1,424 completed flights over 12 months sit behind that.
Related
Where to go next
- SLC to DFW, every carrier
- Delta on DFW to SLC, the return leg
- American Airlines on SLC to DFW78.7%
- Frontier Airlines on SLC to DFW78.1%
- Delta Air Lines network-wide record
- Salt Lake City International (SLC) delay statistics
- Dallas/Fort Worth International (DFW) delay statistics
- The best time of day to fly, according to 7.05 million flight records
- Worst months to fly in the US, ranked by the data
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.