Carrier route record
DLBNA→SLC
Delta Air Lines · Nashville to Salt Lake City
- 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 BNA to SLC earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 10 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 933 flights, with a median arrival 7 minutes early.
Set against the rest of the country, Delta's BNA to SLC record is 10 points better than the US average of 77.3%. That gap is worth roughly 98 fewer late arrivals for every thousand flights.
Key figures
On time
87.1%
Arrivals under 15 minutes late, of 925 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
0.64%
National rate is 1.89%
Whole route
83.5%
Every carrier on BNA to SLC, 1,205 flights
These figures cover 933 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 BNA to SLC
Delta flew 933 of the 1,205 flights on BNA to SLC, most of the route. Its 87.1% on time is 4 points better than the route as a whole, which runs 83.5%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Delta at 87.1% to Southwest at 71.1%. 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.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines (this page) | 933 | 87.1% | 61 min | 0.64% | A+ |
| Southwest Airlinesthin sample | 272 | 71.1% | 50 min | 0.74% | C+ |
Flight by flight
Delta flight numbers on BNA to SLC
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–8am362 flights88.9%
- 8am–11am—
- 11am–2pm26 flights—
- 2pm–5pm198 flights86.3%
- 5pm–8pm347 flights85.4%
- 8pm–5am—
Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.
The 5am–8am window is the strongest at 88.9% on time. The full set of windows spans 4 points.
Across the year
Delta on BNA to SLC through the year
September is the best month on the calendar at 93.2% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. May was the busiest month here, with 87 flights.
Across the week, Wednesday is the strongest day at 90.4% on time and Sunday the weakest at 85.0%, a spread of 5 points.
Arrival by arrival
How late Delta on BNA to SLC runs when it is late
Delta on BNA to SLC often beats the schedule: 247 of 925 completed flights, 27%, arrived 15 minutes or more early. The 119 late arrivals split 48 under half an hour, 36 between 30 and 60 minutes, and 35 an hour or more.
- 15+ min early247 flights26.7%
- Within 15 min559 flights60.4%
- 15–29 min late48 flights5.2%
- 30–59 min late36 flights3.9%
- 1–2 hours late20 flights2.2%
- 2+ hours late15 flights1.6%
Scale runs 0% to 100%.
Share of 925 completed flights by arrival against schedule.
31 of 118 late departures made up the time and arrived on time, 26% of them. 32 flights left on time and still arrived late.
The worst days
Worst days for Delta on BNA to SLC
The latest arrival of the period was on 12 March 2026, 6 hours 57 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). Three of the five worst days fell in March 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 12 March 2026 | 6 hours 57 minutes | Carrier |
| 5 January 2026 | 4 hours 37 minutes | Carrier |
| 18 March 2026 | 4 hours 17 minutes | Carrier |
| 17 March 2026 | 4 hours 13 minutes | Carrier |
| 20 September 2025 | 3 hours 52 minutes | Carrier |
Delay causes
Why Delta runs late on this route
Carrier accounts for 46% of the 7,196 delay minutes carriers reported here, and the remaining four split what is left.
- 46%Carrier
- 35%Late-arriving aircraft
- 15%National Airspace System
- 4%Extreme weather
35% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,196 reported delay minutes here, that single category outweighs weather by 9 to one. The split is drawn from 7,196 reported delay minutes.
The largest share of delay minutes, 46%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,322 of the 7,196 delay minutes reported here.
Cancellations are rare at 0.64%, 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 3.8% 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 85.0% 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 BNA to SLC
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 87.1% 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
- BNA to SLC, every carrier
- Delta on SLC to BNA, the return leg
- Southwest Airlines on BNA to SLC71.1%
- Delta Air Lines network-wide record
- Nashville International (BNA) delay statistics
- Salt Lake City International (SLC) delay statistics
- Why the first flight of the morning is statistically safest
- 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.