DEN to SLC flight delays & on-time performance
Nonstop flights from Denver International Airport to Salt Lake City International Airport · 391 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at DEN or SLC right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Denver (DEN) to Salt Lake City (SLC) arrived on time 79% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.4% were cancelled, and 6% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (83% on time); Southwest Airlines was the least (73%).
- Departures scheduled around 7am did best (93% on time); around 7pm did worst (66%).
- Tuesday was the most reliable day to fly (83% on time) and Sunday the least (75%).
- The largest source of delay minutes was late-arriving aircraft (46%).
Which airline is most on time from DEN to SLC?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Delta Air Lines | 83% | 0.4% | 14 min | 6.5% | 1,696 |
| Frontier Airlines | 82% | 0.3% | 11 min | 5.6% | 1,023 |
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 80% | 0.6% | 14 min | 6.6% | 1,399 |
| United Airlines | 79% | 0.2% | 13 min | 5.8% | 1,308 |
| Southwest Airlines | 73% | 0.4% | 15 min | 6.7% | 2,307 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am87%267 flights
- 6am93%229 flights
- 7am93%474 flights
- 8am90%657 flights
- 9am83%272 flights
- 10am83%312 flights
- 11am80%600 flights
- 12pm82%454 flights
- 1pm82%586 flights
- 2pm78%192 flights
- 3pm81%809 flights
- 4pm75%265 flights
- 5pm69%449 flights
- 6pm69%495 flights
- 7pm66%519 flights
- 8pm69%515 flights
- 9pm70%342 flights
- 10pm68%294 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday78%0.3% cancelled
- Tuesday83%0.4% cancelled
- Wednesday78%0.4% cancelled
- Thursday79%0.2% cancelled
- Friday76%0.7% cancelled
- Saturday82%0.4% cancelled
- Sunday75%0.4% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft46%
- Airline (crew, maintenance, cleaning, fueling)38%
- Air traffic control & airport congestion12%
- Extreme weather4%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Air traffic control & airport congestion38%
- Airline (crew, maintenance, cleaning, fueling)34%
- Extreme weather28%
- Security0%
DEN to SLC: common questions
- How often are DEN to SLC flights on time?
- 79% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Denver to Salt Lake City cancelled?
- 0.4% of scheduled flights were cancelled (29 of 7,733).
- How long are typical delays?
- Across all flights the average arrival delay was 14 min (early arrivals count as zero). Flights that were late arrived 60 min behind schedule on average, and 6.3% of flights were an hour or more late.
- How long is taxi time at DEN?
- Flights on this route spent 19 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SLC to DEN — 79% on time
More flights from Denver
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: DEN → SLC, nonstop flights by US airlines that report to the DOT. How we calculate this.