Route profile
BNA→SLC
Flight reliability, delays and best times to fly from Nashville to Salt Lake City, 1,404 miles.
Right now
Aviation weather is not currently a factor.
Aviation weather is not currently a factor.
Route reliability
July 2023 – July 2026
Better than 93% of comparable major US routes (4,598 compared)
Calculated from 3,381 flights. How this is calculated
BNA → SLC arrives on time 86.6% of the time; the return trip, SLC → BNA, arrives on time 85.7% of the time.
BNA → SLC spends 23.2 minutes on the ground on a 1,404-mile trip: 15.8 minutes from pushback to wheels-up at BNA and 7.4 minutes from touchdown to gate at SLC.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
What stands out
Every day of the week performs about the same on this route, steadier than 99% of 4,467 comparable routes.
87.9% on time on the best day (Wednesday) against 84.9% on the worst (Saturday).
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Ranked against every other route with the same kind of figure and at least 4,467 in the comparison.
What sets this route apart
Where BNA to SLC differs most from similar routes by hour, weekday, month and airline, July 2023 – July 2026.
BNA to SLC is at its best against routes of similar length for flights scheduled at 7 PM: 84.4% arrive on time, 17.8 points ahead of the 66.6% those routes manage at that hour. Against all other routes the gap is 16.6 points.
BNA to SLC holds up on Fridays better than routes of similar length do: 87.7% on time to their 76.7%, a 11 points lead. Against all other routes the gap is 11.5 points.
August is kinder to BNA to SLC than to routes of similar length: 90.0% on time against 76.6%, 13.4 points better. Against all other routes the gap is 13.5 points.
Delta Air Lines does better on BNA to SLC than on its routes of similar length: 88.9% on time here, 82.7% there, 6.2 points apart. Against all other routes the gap is 7.4 points.
BNA to SLC against comparable routes
July 2023 – July 2026| Measure | This route | Compared with | Them | Gap | Flights behind it |
|---|---|---|---|---|---|
| Hour: 7 PM departures | 84.4% | routes of similar length | 66.6% | +17.8 pts | 597 here, 79,923 there |
| Weekday: Friday | 87.7% | routes of similar length | 76.7% | +11.0 pts | 487 here, 249,775 there |
| Month: August | 90.0% | routes of similar length | 76.6% | +13.4 pts | 281 here, 138,781 there |
| Airline: Delta Air Lines | 88.9% | routes of similar length | 82.7% | +6.2 pts | 2,846 here, 335,064 there |
Each comparison pools the flights of other routes, with this route’s own left out. Similar length means within 15% of this route’s 1,404 miles, with at least 5 such routes. A bucket is set against the most comparable group that has enough flights: similar length, then the same origin (at least 3 routes), then all other routes. Hours, weekdays and months appear only where both sides have 120 completed flights, and airlines where both have 600. The gap must be at least 2 points and 2 standard errors, and only the largest gap each way is kept per measure. These are differences in the flights counted, not causes.
When it goes wrong
July 2023 – July 2026
24 min late
against a median of 8 min early
Percentiles over 3,381 operations; cancelled and diverted flights are counted separately.
Will your connection be tight enough?
Layovers at SLC after arriving from BNA.
| Connection time | Chance of missing | Reads as |
|---|---|---|
| 30 min | 29% | High risk |
| 45 min | 13% | Some risk |
| 60 min | 8.0% | Some risk |
| 90 min | 4.0% | Low risk |
| 120 min | 2.5% | Low risk |
This is one leg of a connection. Gate changes and the next flight's own schedule matter too. And a connection can fail before delay is even the question — this route cancels 0.56% of the time and diverts 0.03% of the time, which a late arrival never shows up in.
Chance of missing is the share of 3,361 arrivals on this route that landed later than the connection time less 30 minutes to reach the next gate.
The worst tenth of arrivals on this route land at least 24 minutes late (90th-percentile gate arrival delay), over 3,381 operations.
Any other layover length: connection checker.
Best time to fly
BNA → SLC flights departing 5–9 AM arrived on time 92.1% of the time, against 83.4% for 6–9 PM departures, a gap of 8.7 percentage points.
By departure window
By departure hour
- 12 AM to 6 AM: too few flights to score
- 7 AM: 91.6% on time from 1,069 flights
- 8 AM to 12 PM: too few flights to score
- 1 PM: 86.8% on time from 402 flights
- 2 PM: 84.3% on time from 455 flights
- 3 PM: too few flights to score
- 4 PM: 82.9% on time from 256 flights
- 5 PM: 86.9% on time from 207 flights
- 6 PM: too few flights to score
- 7 PM: 84.4% on time from 599 flights
- 8 PM to 11 PM: too few flights to score
Departure windows with fewer than 120 flights are not scored.
Why BNA → SLC runs late
July 2023 – July 2026
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for BNA → SLC. Only delays of 15 minutes or more are attributed.
Airlines on this route
Carriers with at least 200 flights, by the airline that operated each one.
| Carrier | Flights | On time | Cancelled | Median delay | Severe |
|---|---|---|---|---|---|
| Delta Air Lines | 2,863 | 88.9% | 0.56% | -10 min | 3.5% |
| Southwest Airlines | 516 | 73.9% | 0.58% | 2 min | 6.8% |
Delta Air Lines flew 84.7% of the 3,379 flights listed.
Delta Air Lines arrived on time 15.0 percentage points more often than Southwest Airlines on this route.
Flights on this route
Flight numbers with at least 600 operations here and still on the schedule.
| Flight | Scheduled | Operations | On time |
|---|---|---|---|
| DL1068 Delta Air Lines | 7:20 AM | 929 | 92.6% |
Weekly and seasonal patterns
By day of week
Wednesday is historically the most reliable day and Saturday the least, a gap of 3.0 percentage points.
By month
- Jan: 89.6%
- Feb: 89.1%
- Mar: 86.3%
- Apr: 88.1%
- May: 86.0%
- Jun: 75.9%
- Jul: 82.8%
- Aug: 90.0%
- Sep: 89.8%
- Oct: 89.3%
- Nov: 91.5%
- Dec: 86.7%
June is historically the weakest month and November the strongest, a spread of 15.6 percentage points.
Reliability over time
July 2023 – July 2026
Over the most recent 12 months (2025-08 to 2026-07), on-time arrivals averaged 84.1% against 86.2% in the 12 months before — declining by 2.1 percentage points.
Data and methodology
Calculated by FlyerIntel from 3,381 BNA → SLC flight records from the US DOT Bureau of Transportation Statistics, covering July 2023 – July 2026. Late means 15 or more minutes past scheduled arrival; cancelled and diverted flights are left out of on-time rates.
Full methodology · Data sources · Report a problem
Related research: How Long a Layover Needs to Be · Two Airlines on One Route · Best Time of Day to Fly From Major US Airports
Analysis last recomputed