Carrier route record
DLSLC→BNA
Delta Air Lines · Salt Lake City to Nashville
- Flights
- 933
- Period
- September 2025 to August 2026
- Share of route
- 77%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on SLC to BNA earns an A+. 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 about 55 minutes. That rests on 933 flights, with a median arrival 8 minutes early.
Set against the rest of the country, Delta's SLC to BNA record is 8 points better than the US average of 77.3%. That gap is worth roughly 77 fewer late arrivals for every thousand flights.
Key figures
On time
85.0%
Arrivals under 15 minutes late, of 925 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
0.54%
National rate is 1.89%
Whole route
85.0%
Every carrier on SLC to BNA, 1,205 flights
These figures cover 933 flights between September 2025 and August 2026. The median arrival is 8 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.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
Delta against every carrier on SLC to BNA
Delta flew 933 of the 1,205 flights on SLC to BNA, most of the route. Its 85.0% on time is about level with the route as a whole at 85.0%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from Southwest at 85.2% to Delta at 85.0%. 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.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Southwest Airlinesthin sample | 272 | 85.2% | 41 min | 0.74% | A+ |
| Delta Air Lines (this page) | 933 | 85.0% | 55 min | 0.54% | A+ |
Flight by flight
Delta flight numbers on SLC to BNA
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 is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 933 flights.
- 5am–8am—
- 8am–11am357 flights89.5%
- 11am–2pm107 flights81.1%
- 2pm–5pm106 flights86.7%
- 5pm–8pm363 flights81.2%
- 8pm–5am—
Scale runs 75% 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 81.1% on time against 89.5% for 8am–11am. 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 363 flights scheduled in it.
Across the year
Delta on SLC to BNA through the year
July is the worst month at 75.6% on time, 17 points below November, the best at 92.9%. 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. May was the busiest month here, with 87 flights.
Across the week, Thursday is the strongest day at 87.8% on time and Friday the weakest at 82.7%, a spread of 5 points.
Arrival by arrival
How late Delta on SLC to BNA runs when it is late
Delta on SLC to BNA often beats the schedule: 283 of 925 completed flights, 31%, arrived 15 minutes or more early. The 139 late arrivals split 48 under half an hour, 50 between 30 and 60 minutes, and 41 an hour or more.
- 15+ min early283 flights30.6%
- Within 15 min503 flights54.4%
- 15–29 min late48 flights5.2%
- 30–59 min late50 flights5.4%
- 1–2 hours late27 flights2.9%
- 2+ hours late14 flights1.5%
Scale runs 0% to 100%.
Share of 925 completed flights by arrival against schedule.
35 of 139 late departures made up the time and arrived on time, 25% of them. 35 flights left on time and still arrived late.
The worst days
Worst days for Delta on SLC to BNA
The latest arrival of the period was on 14 December 2025, 3 hours 32 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 December 2025 | 3 hours 32 minutes | Carrier |
| 15 March 2026 | 3 hours 24 minutes | National Airspace System |
| 17 March 2026 | 3 hours 7 minutes | Late-arriving aircraft |
| 18 February 2026 | 2 hours 51 minutes | Carrier |
| 28 August 2026 | 2 hours 42 minutes | Carrier |
Delay causes
Why Delta runs late on this route
Carrier accounts for 51% of the 7,626 delay minutes carriers reported here, and the remaining four split what is left.
- 51%Carrier
- 24%Late-arriving aircraft
- 22%National Airspace System
- 3%Extreme weather
The largest share of delay minutes, 51%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,890 of the 7,626 delay minutes reported here. The split is drawn from 7,626 reported delay minutes.
Cancellations are rare at 0.54%, 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
Badly late arrivals are rare here: only 4.4% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
The 1,404 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 87.1% on time across 933 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.
One caution: this is a thin sample. 933 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 Delta on SLC to BNA
Put together: treat all of this as provisional. 933 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 85.0% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 925 completed flights over 12 months sit behind that.
Related
Where to go next
- SLC to BNA, every carrier
- Delta on BNA to SLC, the return leg
- Southwest Airlines on SLC to BNA85.2%
- Delta Air Lines network-wide record
- Salt Lake City International (SLC) delay statistics
- Nashville International (BNA) 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.