Carrier route record
DLSLC→FCA
Delta Air Lines · Salt Lake City to Kalispell
- Flights
- 447
- Period
- September 2025 to August 2026
- Share of route
- 40%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Delta Air Lines.
Delta on SLC to FCA earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 447 flights, with a median arrival 8 minutes early.
Set against the rest of the country, Delta's SLC to FCA record is 8 points better than the US average of 77.3%. That gap is worth roughly 76 fewer late arrivals for every thousand flights.
Key figures
On time
84.9%
Arrivals under 15 minutes late, of 443 completed flights
Avg delay
76 min
Across delayed arrivals only, not all flights
Cancelled
0.45%
National rate is 1.89%
Whole route
88.6%
Every carrier on SLC to FCA, 1,125 flights
These figures cover 447 flights between September 2025 and August 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.
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Carrier by carrier
Delta against every carrier on SLC to FCA
Delta flew 447 of the 1,125 flights on SLC to FCA, about 40% of it. Its 84.9% on time is 4 points worse than the route as a whole, which runs 88.6%. Ranked by on-time rate it is last of two carriers on the route, where the range runs from SkyWest at 91.0% to Delta at 84.9%.
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 | 678 | 91.0% | 59 min | 0.88% | A+ |
| Delta Air Lines (this page) | 447 | 84.9% | 76 min | 0.45% | B+ |
Flight by flight
Delta flight numbers on SLC to FCA
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Departure window
When Delta runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 12 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am96 flights93.8%
- 11am–2pm1 flights—
- 2pm–5pm1 flights—
- 5pm–8pm—
- 8pm–5am349 flights82.3%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 93.8% of the time, against 82.3% for the overnight window. That is 12 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 349 flights scheduled in it.
Across the year
Delta on SLC to FCA through the year
December is the weak month at 66.7% on time, against 97.6% in May. 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. August was the busiest month here, with 62 flights.
Across the week, Tuesday is the strongest day at 91.4% on time and Friday the weakest at 78.5%, a spread of 13 points.
Arrival by arrival
How late Delta on SLC to FCA runs when it is late
Delta on SLC to FCA often beats the schedule: 118 of 443 completed flights, 27%, arrived 15 minutes or more early. The 67 late arrivals split 28 under half an hour, 17 between 30 and 60 minutes, and 22 an hour or more.
- 15+ min early118 flights26.6%
- Within 15 min258 flights58.2%
- 15–29 min late28 flights6.3%
- 30–59 min late17 flights3.8%
- 1–2 hours late13 flights2.9%
- 2+ hours late9 flights2.0%
Scale runs 0% to 100%.
Share of 443 completed flights by arrival against schedule.
18 of 75 late departures made up the time and arrived on time, 24% of them. 10 flights left on time and still arrived late.
The worst days
Worst days for Delta on SLC to FCA
The latest arrival of the period was on 14 January 2026, 15 hours 36 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across January, November, March and October, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 January 2026 | 15 hours 36 minutes | Extreme weather |
| 12 November 2025 | 12 hours 55 minutes | Extreme weather |
| 10 January 2026 | 3 hours 17 minutes | Late-arriving aircraft |
| 15 March 2026 | 2 hours 49 minutes | Carrier |
| 6 October 2025 | 2 hours 35 minutes | Late-arriving aircraft |
Delay causes
Why Delta runs late on this route
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 5,067 reported delay minutes.
- 36%Carrier
- 33%Extreme weather
- 25%Late-arriving aircraft
- 6%National Airspace System
Extreme weather accounts for 33% 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 5.4 times the usual weather exposure. The split is drawn from 5,067 reported delay minutes.
The largest share of delay minutes, 36%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,822 of the 5,067 delay minutes reported here.
Cancellations are rare at 0.45%, 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
5.0% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
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.
The return leg runs 86.7% on time across 447 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. 447 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 SLC to FCA
Put together: treat all of this as provisional. 447 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 84.9% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 443 completed flights over 12 months sit behind that.
Related
Where to go next
- SLC to FCA, every carrier
- Delta on FCA to SLC, the return leg
- SkyWest Airlines on SLC to FCA91.0%
- 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
- The best time of day to fly, according to 7.05 million flight records
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.