Route on-time record
SLC to DEN: most on-time flights and the best time to fly
Salt Lake City (Salt Lake City International Airport) to Denver (Denver International Airport). 7,763 nonstop flights in Jun 2025 to May 2026, 77% arrived within 15 minutes and 0.6% were cancelled. The most reliable flight number was SkyWest 5683 at 5:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
SLC → DEN
Salt Lake City to Denver: 7,763 nonstop flights a year
On time (12 months)
77%
Cancelled
0.6%
avg delay 15 min
Best time to leave
Before 9 AM
84% on time vs 66% 3 to 6 PM
Most reliable airline
SkyWest
83% chance on time
Lowest nonstop fare seen in the next two months: $156 (United 1955 on 2026-10-19). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · SkyWest 5683 · sold as United Express, Delta Connection, American Eagle or Alaska
5:00 AM → 6:48 AM1h 48m nonstop
Local times, typical schedule. Last flown 2026-05-31.
95%
chance on time
- On time (history)
- 95%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 95% of the time (264 flights, Jun 2025 to May 2026).
- Never cancelled in 264 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 3 to 6 PM: 66%).
Strong track record · 264 flights
Find 5:00 AM flight fares Opens this date on Aviasales#2 · United 1232
7:00 AM → 8:40 AM1h 40m nonstop
Local times, typical schedule. Last flown 2026-05-31.
91%
chance on time
- On time (history)
- 95%
- Cancelled
- 0.9%
- Avg arrival delay
- 3 min
- Arrived on time 95% of the time (107 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 3 to 6 PM: 66%).
Moderate track record · 107 flights
Find United 1232 fares Opens this date on Aviasales#3 · SkyWest 4720 · sold as United Express, Delta Connection, American Eagle or Alaska
1:12 PM → 2:55 PM1h 43m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.4%
- Avg arrival delay
- 11 min
- Arrived on time 90% of the time (282 flights, Jun 2025 to May 2026).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
Strong track record · 282 flights
Find 1:12 PM flight fares Opens this date on Aviasales#4 · Delta 1317
7:45 AM → 9:22 AM1h 37m nonstop
Local times, typical schedule. Last flown 2026-05-31.
86%
chance on time
- On time (history)
- 92%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 92% of the time (25 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 3 to 6 PM: 66%).
- Short track record (25 flights), so its score leans on the airline's record at this hour.
Limited track record · 25 flights
Find Delta 1317 fares Opens this date on Aviasales#5 · SkyWest 5858 · sold as United Express, Delta Connection, American Eagle or Alaska
10:50 AM → 12:38 PM1h 48m nonstop
Local times, typical schedule. Last flown 2026-04-29.
86%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 91% of the time (32 flights, Jun 2025 to May 2026).
- Never cancelled in 32 scheduled flights.
- Short track record (32 flights), so its score leans on the airline's record at this hour.
Limited track record · 32 flights
Find 10:50 AM flight fares Opens this date on Aviasales#6 · Delta 952
9:55 AM → 11:33 AM1h 38m nonstop
Local times, typical schedule. Last flown 2026-04-12.
86%
chance on time
- On time (history)
- 89%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 89% of the time (36 flights, Jun 2025 to May 2026).
- Never cancelled in 36 scheduled flights.
- Short track record (36 flights), so its score leans on the airline's record at this hour.
Limited track record · 36 flights
Find Delta 952 fares Opens this date on Aviasales#7 · SkyWest 5626 · sold as United Express, Delta Connection, American Eagle or Alaska
10:44 AM → 12:31 PM1h 47m nonstop
Local times, typical schedule. Last flown 2026-05-20.
84%
chance on time
- On time (history)
- 86%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 86% of the time (14 flights, Jun 2025 to May 2026).
- Short track record (14 flights), so its score leans on the airline's record at this hour.
Limited track record · 14 flights
Find 10:44 AM flight fares Opens this date on Aviasales#8 · Southwest 4467
7:55 AM → 9:35 AM1h 40m nonstop
Local times, typical schedule. Last flown 2026-04-06.
83%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 91% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 84% on time; 3 to 6 PM: 66%).
- Short track record (33 flights), so its score leans on the airline's record at this hour.
Limited track record · 33 flights
Find Southwest 4467 fares Opens this date on Aviasales#9 · Delta 1553
10:10 AM → 11:45 AM1h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.3%
- Avg arrival delay
- 8 min
- Arrived on time 82% of the time (323 flights, Jun 2025 to May 2026).
Strong track record · 323 flights
Find Delta 1553 fares Opens this date on Aviasales#10 · Southwest 3584
1:10 PM → 2:40 PM1h 30m nonstop
Local times, typical schedule. Last flown 2026-05-30.
82%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 3584 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)83%
1,377 flights · 84% on time as flown · 0.6% cancel
- Delta Air Lines78%
1,690 flights · 78% on time as flown · 0.3% cancel
- Frontier Airlines76%
996 flights · 77% on time as flown · 0.8% cancel
- United Airlines76%
1,354 flights · 76% on time as flown · 0.5% cancel
- Southwest Airlines72%
2,346 flights · 72% on time as flown · 0.7% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM84%
2,311 flights · avg delay 11 min
- 9 AM to noon80%
1,311 flights · avg delay 10 min
- Noon to 3 PM77%
1,641 flights · avg delay 15 min
- 3 to 6 PM66%
1,048 flights · avg delay 22 min
- 6 to 9 PM66%
1,161 flights · avg delay 26 min
- After 9 PM83%
291 flights · avg delay 12 min
Best day: Tuesday (79%). Worst: Friday (74%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Air traffic control and airport volume37%
- Airline (crew, maintenance, boarding)32%
- Late-arriving aircraft29%
- Severe weather2%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
SLC to DEN questions
- What time of day is best to fly SLC to DEN?
- Before 9 AM: 84% of flights arrived on time, against 66% for departures 3 to 6 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from SLC to DEN?
- SkyWest, with a season-adjusted 83% chance of operating and arriving on time over 1,377 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on SLC to DEN?
- July (68% on time); the best was November (85%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from SLC
- DEN to SLC (return)
- SLC to PHX 84%
- SLC to SEA 79%
- SLC to LAX 86%
- SLC to DFW 78%
- SLC to LAS 78%
- SLC to SFO 72%
- SLC to ORD 75%
- SLC to ATL 86%
- SLC to SAN 84%
- SLC to PDX 88%
- SLC to SMF 86%
- SLC to IAH 85%
Live status: FAA delays and ground stops