SLC to DEN flight delays & on-time performance
Nonstop flights from Salt Lake City International Airport to Denver International Airport · 391 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SLC or DEN right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Salt Lake City (SLC) to Denver (DEN) arrived on time 79% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.5% were cancelled, and 6% arrived an hour or more late.
- SkyWest Airlines was the most punctual airline here (85% on time); Southwest Airlines was the least (73%).
- Departures scheduled around 5am did best (96% on time); around 4pm did worst (61%).
- Saturday was the most reliable day to fly (84% on time) and Friday the least (74%).
- The largest source of delay minutes was air traffic control & airport congestion (34%).
Which airline is most on time from SLC to DEN?
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 |
|---|---|---|---|---|---|
| SkyWest AirlinesRegional airline operating flights for United Express, Delta Connection, American Eagle and Alaska. | 85% | 0.6% | 11 min | 4.6% | 1,394 |
| Delta Air Lines | 81% | 0.2% | 14 min | 7.1% | 1,696 |
| United Airlines | 81% | 0.4% | 13 min | 5.7% | 1,309 |
| Frontier Airlines | 79% | 0.8% | 17 min | 7.2% | 1,023 |
| Southwest Airlines | 73% | 0.6% | 14 min | 6.2% | 2,306 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am96%454 flights
- 6am93%241 flights
- 7am88%1,065 flights
- 8am74%584 flights
- 9am87%175 flights
- 10am79%893 flights
- 11am83%205 flights
- 12pm86%260 flights
- 1pm85%779 flights
- 2pm73%537 flights
- 3pm61%185 flights
- 4pm61%526 flights
- 5pm71%456 flights
- 6pm73%579 flights
- 7pm74%121 flights
- 8pm71%256 flights
- 9pm80%330 flights
- 10pm78%82 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday78%0.3% cancelled
- Tuesday82%0.6% cancelled
- Wednesday78%0.5% cancelled
- Thursday78%0.3% cancelled
- Friday74%0.7% cancelled
- Saturday84%1.0% cancelled
- Sunday81%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.
- Air traffic control & airport congestion34%
- Airline (crew, maintenance, cleaning, fueling)33%
- Late-arriving aircraft31%
- Extreme weather2%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Air traffic control & airport congestion37%
- Airline (crew, maintenance, cleaning, fueling)34%
- Extreme weather29%
- Security0%
SLC to DEN: common questions
- How often are SLC to DEN 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 Salt Lake City to Denver cancelled?
- 0.5% of scheduled flights were cancelled (38 of 7,728).
- 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 6.1% of flights were an hour or more late.
- How long is taxi time at SLC?
- Flights on this route spent 21 min taxiing from the gate to takeoff on average.
Related routes
Return trip: DEN to SLC — 79% on time
More flights from Salt Lake City
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SLC → DEN, nonstop flights by US airlines that report to the DOT. How we calculate this.