Route reliability record
SLC→BZN
Salt Lake City to Bozeman
- Flights
- 1,160
- Period
- September 2025 to August 2026
- Distance
- 347 mi
- Carriers
- 2
This route 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 11 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 50 minutes. That rests on 1,160 SLC to BZN flights, of which Delta Air Lines flew 659 at 90.1% on time.
Best time to fly SLC to BZN: a 8am–11am departure, ideally on a Wednesday. Flights in that window arrived on time 91.1% of the time and Wednesday flights 93.8%, against 88.5% for the route overall.
Set against the rest of the country, this route's record is 11 points better than the US average of 77.3%. That gap is worth roughly 112 fewer late arrivals for every thousand flights.
Key figures
On time
88.5%
Arrivals under 15 minutes late, of 1,148 completed flights
Avg delay
52 min
Across delayed arrivals only, not all flights
Cancelled
0.52%
National rate is 1.89%
Best carrier
Delta
90.1% on time across 659 flights
These figures cover 1,160 flights between September 2025 and August 2026. The median arrival is 9 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
Which airline is most reliable on SLC to BZN
The two carriers here are closely matched: 4 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 659 | 90.1% | 57 min | 0.30% | A+ |
| SkyWest Airlines | 501 | 86.4% | 47 min | 0.80% | A+ |
No carrier stands out. Delta tops the table at 90.1%, 4 points clear of the bottom, which is inside the range this kind of sample moves year to year.
Flight by flight
Flights on SLC to BZN
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
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Best ways to make this trip
The most reliable ways to fly Salt Lake City to Bozeman
Every airline on this route, ranked by how often a scheduled flight actually operated and arrived on time, with its best departure time and most punctual flight number. No nearby airport pair beat these.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. SLC → BZNSalt Lake City to Bozeman | Delta Air Lines | 89.8% | 90.1% | 0.30% | 8am–11am, Wed | — |
| 2. SLC → BZNSalt Lake City to Bozeman | SkyWest Airlines | 85.7% | 86.4% | 0.80% | 8am–11am, Wed | OO 3676 17:20 |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
Departure window
The best time of day to leave
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 1,160 flights.
- 5am–8am—
- 8am–11am362 flights91.1%
- 11am–2pm50 flights84.0%
- 2pm–5pm317 flights85.9%
- 5pm–8pm66 flights89.4%
- 8pm–5am365 flights88.7%
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 84.0% on time against 91.1% 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 8pm–5am window is the busiest, with 365 flights scheduled in it.
Explore
Filter SLC to BZN by airline, time, month and day
Pick a breakdown and a carrier. The dashed mark on each row is the same slice for every US flight.
On SLC to BZN, the best departure window is 8am–11am at 91.1% on time and the worst is 11am–2pm at 84.0%, a real gap of 7.1 points. All US flights leaving 8am–11am ran 83.9%.
- 5–8am—
- 8–11am91.1%
- 11am–2pm84.0%
- 2–5pm85.9%
- 5–8pm89.4%
- 8pm–5am88.7%
best all US flightsScale 60% to 95%. Cells under 30 flights show a dash.
Across the year
When delays peak on this route
Twelve months, one bar each, drawn from the same 1,160 flights. The strip shows how much of this route's record is set by the calendar rather than by the operation.
September is the best month on the calendar at 94.4% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. July was the busiest month here, with 123 flights.
Across the week, Wednesday is the strongest day at 93.8% on time and Monday the weakest at 85.3%, a spread of 9 points.
Delay causes
Why this route gets delayed
Carrier accounts for 68% of the 6,853 delay minutes carriers reported here, and the remaining four split what is left.
- 68%Carrier
- 14%Extreme weather
- 10%Late-arriving aircraft
- 8%National Airspace System
Extreme weather accounts for 14% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.4 times the usual weather exposure. The split is drawn from 6,853 reported delay minutes.
The largest share of delay minutes, 68%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 4,665 of the 6,853 delay minutes reported here.
Cancellations are rare at 0.52%, 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 actually costs
Badly late arrivals are rare here: only 2.5% 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 8am–11am window matters as much as it does.
The return leg runs 89.7% on time across 1,160 flights, within about a point 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 1,160 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.
Work out the risk of missing a connection in BZN after this flight
What to do with this
Booking this route
Put together: take the 8am–11am departure, avoid March if the dates are flexible, and if two carriers are within a few dollars of each other, Delta is the one with the record behind it. None of that guarantees an on-time arrival; it moves the odds by 7 points, which is the most any booking decision can do. 1,148 completed flights over 12 months sit behind that.
Common questions
SLC to BZN questions
How often is SLC to BZN delayed?
About one flight in nine arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 11.5% of the 1,160 flights in this analysis, against 22.7% nationally. Delayed flights are late by roughly 50 minutes on average.
Which airline is most reliable on SLC to BZN?
Delta Air Lines leads at 90.1% on time across 659 flights. SkyWest Airlines is at the other end on 86.4%, a gap of 4 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on SLC to BZN?
The 8am–11am departure window is the strongest at 91.1% on time. The 11am–2pm window is the weakest at 84.0%, 7 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are March delays on SLC to BZN?
March is the weakest month at 83.7% on time, compared with 94.4% in September. Across the year that is 11 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
- BZN to SLC — the return legseparate record
- Salt Lake City International (SLC) delay statistics
- Delta Air Lines on SLC to BZN90.1%
- SkyWest Airlines on SLC to BZN86.4%
- SLC to DEN, a related route79.0%
- DEN to BZN, a related route78.1%
- SLC to PHX, a related route83.5%
- Delta Air Lines on-time record90.1%
- SkyWest Airlines on-time record86.4%
- Flying to ski country: which routes into the mountains run on time
- The most punctual routes in the US, and the least
Direction matters. SLC to BZN and BZN to SLC are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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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.