Carrier route record
DLBZN→SLC
Delta Air Lines · Bozeman to Salt Lake City
- Flights
- 659
- Period
- September 2025 to August 2026
- Share of route
- 57%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on BZN 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 15 points better than the national rate of 77.3%. When something does go wrong the average delay runs an hour and a half. That rests on 659 flights, with a median arrival 13 minutes early.
Set against the rest of the country, Delta's BZN to SLC record is 15 points better than the US average of 77.3%. That gap is worth roughly 151 fewer late arrivals for every thousand flights.
Key figures
On time
92.4%
Arrivals under 15 minutes late, of 657 completed flights
Avg delay
87 min
Across delayed arrivals only, not all flights
Cancelled
0.30%
National rate is 1.89%
Whole route
89.7%
Every carrier on BZN to SLC, 1,160 flights
These figures cover 659 flights between September 2025 and August 2026. The median arrival is 13 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 BZN to SLC
Delta flew 659 of the 1,160 flights on BZN to SLC, most of the route. Its 92.4% on time is 3 points better than the route as a whole, which runs 89.7%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Delta at 92.4% to SkyWest at 86.1%.
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) | 659 | 92.4% | 87 min | 0.30% | A+ |
| SkyWest Airlines | 501 | 86.1% | 94 min | 0.80% | A+ |
Flight by flight
Delta flight numbers on BZN 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 659 flights.
- 5am–8am365 flights94.2%
- 8am–11am—
- 11am–2pm294 flights90.1%
- 2pm–5pm—
- 5pm–8pm—
- 8pm–5am—
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
The early departures do better, though not dramatically: 94.2% on time for the 5am–8am window against 90.1% for 11am–2pm. Worth taking if the schedule allows, not worth an extra connection. The 5am–8am window is the busiest, with 365 flights scheduled in it.
Across the year
Delta on BZN to SLC through the year
September is the best month on the calendar at 98.1% 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 62 flights.
Across the week, Sunday is the strongest day at 94.8% on time and Monday the weakest at 89.5%, a spread of 5 points.
Arrival by arrival
How late Delta on BZN to SLC runs when it is late
Delta on BZN to SLC often beats the schedule: 296 of 657 completed flights, 45%, arrived 15 minutes or more early. The 50 late arrivals split 21 under half an hour, 10 between 30 and 60 minutes, and 19 an hour or more.
- 15+ min early296 flights45.1%
- Within 15 min311 flights47.3%
- 15–29 min late21 flights3.2%
- 30–59 min late10 flights1.5%
- 1–2 hours late9 flights1.4%
- 2+ hours late10 flights1.5%
Scale runs 0% to 100%.
Share of 657 completed flights by arrival against schedule.
11 of 50 late departures made up the time and arrived on time, 22% of them. Only 11 left on time and still arrived late.
The worst days
Worst days for Delta on BZN to SLC
The latest arrival of the period was on 16 April 2026, 10 hours 8 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 16 April 2026 | 10 hours 8 minutes | Late-arriving aircraft |
| 23 March 2026 | 6 hours 43 minutes | Carrier |
| 14 July 2026 | 6 hours 7 minutes | Carrier |
| 22 April 2026 | 5 hours 10 minutes | Late-arriving aircraft |
| 24 November 2025 | 3 hours 56 minutes | Late-arriving aircraft |
Delay causes
Why Delta runs late on this route
Late-arriving aircraft accounts for 50% of the 4,324 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Late-arriving aircraft
- 42%Carrier
- 8%National Airspace System
- 0%Extreme weather
50% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 4,324 reported delay minutes here, that single category outweighs weather by 50 to one. The split is drawn from 4,324 reported delay minutes.
The largest share of delay minutes, 42%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,801 of the 4,324 delay minutes reported here.
Cancellations are rare at 0.30%, 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 2.9% 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.
At 347 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5am–8am window matters as much as it does.
The return leg runs 90.1% on time across 659 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. 659 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 BZN to SLC
Put together: treat all of this as provisional. 659 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 92.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 657 completed flights over 12 months sit behind that.
Related
Where to go next
- BZN to SLC, every carrier
- Delta on SLC to BZN, the return leg
- SkyWest Airlines on BZN to SLC86.1%
- Delta Air Lines network-wide record
- Salt Lake City International (SLC) delay statistics
- Flying to ski country: which routes into the mountains run on time
- Why the first flight of the morning is statistically safest
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.