Route reliability record
SLC→BZN
Salt Lake City to Bozeman
- Flights
- 1,158
- Period
- July 2025 to June 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 10 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 50 minutes. That rests on 1,158 SLC to BZN flights, of which Delta Air Lines flew 654 at 87.8% on time.
Best time to fly SLC to BZN: a 11am–2pm departure, ideally on a Wednesday. Flights in that window arrived on time 93.5% of the time and Wednesday flights 92.6%, against 87.7% for the route overall.
Set against the rest of the country, this route's record is 10 points better than the US average of 77.6%. That gap is worth roughly 101 fewer late arrivals for every thousand flights.
Key figures
On time
87.7%
Arrivals under 15 minutes late, of 1,145 completed flights
Avg delay
51 min
Across delayed arrivals only, not all flights
Cancelled
0.60%
National rate is 1.81%
Best carrier
Delta
87.8% on time across 654 flights
These figures cover 1,158 flights between July 2025 and June 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.
Carrier by carrier
Which airline is most reliable on SLC to BZN
The two carriers here are closely matched: half a point 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 | 654 | 87.8% | 52 min | 0.46% | A+ |
| SkyWest Airlines | 504 | 87.5% | 50 min | 0.79% | A+ |
No carrier stands out. Delta tops the table at 87.8%, half a point 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.
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 | 87.4% | 87.8% | 0.46% | 8am–11am, Wed | — |
| 2. SLC → BZNSalt Lake City to Bozeman | SkyWest Airlines | 86.8% | 87.5% | 0.79% | 11am–2pm, Wed | OO 3676 16:15 |
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 1,158 flights.
- 5am–8am—
- 8am–11am362 flights88.5%
- 11am–2pm78 flights93.5%
- 2pm–5pm285 flights86.1%
- 5pm–8pm73 flights87.7%
- 8pm–5am360 flights86.9%
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
The best window here is not the first bank but the 11am–2pm slot at 93.5% on time, ahead of 2pm–5pm at 86.1%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 8am–11am window is the busiest, with 362 flights scheduled in it.
Across the year
When delays peak on this route
Twelve months, one bar each, drawn from the same 1,158 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 119 flights.
Across the week, Wednesday is the strongest day at 92.6% on time and Sunday the weakest at 83.3%. 9 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
One category carries most of the weight here. Carrier accounts for 71% of the 7,237 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 71%Carrier
- 14%Extreme weather
- 8%National Airspace System
- 7%Late-arriving aircraft
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 2.2 times the usual weather exposure. The split is drawn from 7,237 reported delay minutes.
The largest share of delay minutes, 71%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 5,117 of the 7,237 delay minutes reported here.
Cancellations are rare at 0.60%, below the national 1.81% 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 8.1% 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 11am–2pm window matters as much as it does.
The return leg runs 90.4% on time across 1,158 flights, within 3 points 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 1,158 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: this route's record is 87.7% on time with 0.60% cancelled, worth an A+. The largest single lever is the 11am–2pm departure window, and the numbers below the table are where the reasoning behind that lives. 1,145 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 eight arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 12.3% of the 1,158 flights in this analysis, against 22.4% 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 87.8% on time across 654 flights. SkyWest Airlines is at the other end on 87.5%, a gap of half a point. 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 11am–2pm departure window is the strongest at 93.5% on time. The 2pm–5pm window is the weakest at 86.1%, 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 BZN87.8%
- SkyWest Airlines on SLC to BZN87.5%
- SLC to DEN, a related route77.8%
- DEN to BZN, a related route78.1%
- SLC to PHX, a related route83.9%
- Delta Air Lines on-time record87.8%
- SkyWest Airlines on-time record87.5%
- Worst months to fly in the US, ranked by the data
- Late aircraft, weather, or the airline: what actually causes US flight delays
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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.