Carrier route record
DLFCA→SLC
Delta Air Lines · Kalispell to Salt Lake City
- Flights
- 412
- Period
- July 2025 to June 2026
- Share of route
- 36%
- Carriers
- 2
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on FCA 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 77.6%. When something does go wrong the average delay runs about 2.3 hours. That rests on 412 flights, with a median arrival 8 minutes early.
Set against the rest of the country, Delta's FCA to SLC record is 10 points better than the US average of 77.6%. That gap is worth roughly 102 fewer late arrivals for every thousand flights.
Key figures
On time
87.8%
Arrivals under 15 minutes late, of 410 completed flights
Avg delay
137 min
Across delayed arrivals only, not all flights
Cancelled
0.49%
National rate is 1.81%
Whole route
91.6%
Every carrier on FCA to SLC, 1,159 flights
These figures cover 412 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
Delta against every carrier on FCA to SLC
Delta flew 412 of the 1,159 flights on FCA to SLC, about 36% of it. Its 87.8% on time is 4 points worse than the route as a whole, which runs 91.6%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from SkyWest at 93.8% to Delta at 87.8%.
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 |
|---|---|---|---|---|---|
| SkyWest Airlines | 747 | 93.8% | 84 min | 1.07% | A |
| Delta Air Lines (this page) | 412 | 87.8% | 137 min | 0.49% | A+ |
Flight by flight
Delta flight numbers on FCA to SLC
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 412 flights.
- 5am–8am365 flights87.6%
- 8am–11am—
- 11am–2pm47 flights89.4%
- 2pm–5pm—
- 5pm–8pm—
- 8pm–5am—
Scale runs 80% to 95%. Rows with fewer than 30 flights show a dash.
The 11am–2pm window is the strongest at 89.4% on time. The full set of windows spans 2 points.
Across the year
Delta on FCA to SLC through the year
January is the weak month at 77.4% on time, against 96.8% in July. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. June was the busiest month here, with 60 flights.
Across the week, Saturday is the strongest day at 95.2% on time and Friday the weakest at 82.8%. 12 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Delta runs late on this route
One category carries most of the weight here. Carrier accounts for 84% of the 6,824 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.
- 84%Carrier
- 8%National Airspace System
- 7%Extreme weather
- 2%Late-arriving aircraft
The largest share of delay minutes, 84%, 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 5,703 of the 6,824 delay minutes reported here. The split is drawn from 6,824 reported delay minutes.
Cancellations are rare at 0.49%, 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 costs
Badly late arrivals are rare here: only 4.4% 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.
The 532 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg runs 86.3% on time across 412 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. 412 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 FCA to SLC
Put together: treat all of this as provisional. 412 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 87.8% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 410 completed flights over 12 months sit behind that.
Related
Where to go next
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.