Route on-time record
SJC to DEN: most on-time flights and the best time to fly
San Jose (Norman Y. Mineta San Jose International Airport) to Denver (Denver International Airport). 2,594 nonstop flights in Jun 2025 to May 2026, 81% arrived within 15 minutes and 0.4% were cancelled. The most reliable flight number was United 586 at 8:45 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
SJC → DEN
San Jose to Denver: 2,594 nonstop flights a year
On time (12 months)
81%
Cancelled
0.4%
avg delay 12 min
Best time to leave
Before 9 AM
94% on time vs 72% 3 to 6 PM
Most reliable airline
United
87% chance on time
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 · United 586
8:45 AM → 12:23 PM2h 38m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 1134, 272; its record covers all of them.
97%
chance on time
- On time (history)
- 99%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 99% of the time (88 flights, Jun 2025 to May 2026).
- Never cancelled in 88 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 94% on time; 3 to 6 PM: 72%).
Moderate track record · 88 flights
Find United 586 fares Opens this date on Aviasales#2 · Southwest 104
6:00 AM → 9:35 AM2h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 2023; its record covers all of them.
94%
chance on time
- On time (history)
- 98%
- Cancelled
- 1.6%
- Avg arrival delay
- 10 min
- Arrived on time 98% of the time (63 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 94% on time; 3 to 6 PM: 72%).
Moderate track record · 63 flights
Find Southwest 104 fares Opens this date on Aviasales#3 · United 1035
6:19 PM → 9:58 PM2h 39m nonstop
Local times, typical schedule. Last flown 2026-05-31.
90%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 88% of the time (25 flights, Jun 2025 to May 2026).
- Short track record (25 flights), so its score leans on the airline's record at this hour.
Limited track record · 25 flights
Find United 1035 fares Opens this date on Aviasales#4 · Southwest 2933
6:35 AM → 10:05 AM2h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 88% of the time (32 flights, Jun 2025 to May 2026).
- Never cancelled in 32 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 94% on time; 3 to 6 PM: 72%).
- Short track record (32 flights), so its score leans on the airline's record at this hour.
Limited track record · 32 flights
Find Southwest 2933 fares Opens this date on Aviasales#5 · Southwest 4112
8:55 AM → 12:25 PM2h 30m nonstop
Local times, typical schedule. Last flown 2026-05-30. Same departure also flew as Southwest 3658; its record covers all of them.
86%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 85% of the time (41 flights, Jun 2025 to May 2026).
- Never cancelled in 41 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 94% on time; 3 to 6 PM: 72%).
- Short track record (41 flights), so its score leans on the airline's record at this hour.
Limited track record · 41 flights
Find Southwest 4112 fares Opens this date on Aviasales#6 · United 667
3:45 PM → 7:24 PM2h 39m nonstop
Local times, typical schedule. Last flown 2026-05-20.
85%
chance on time
- On time (history)
- 89%
- Cancelled
- 0.9%
- Avg arrival delay
- 10 min
- Arrived on time 89% of the time (113 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 72% on time; Before 9 AM: 94%).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
Moderate track record · 113 flights
Find United 667 fares Opens this date on Aviasales#7 · Southwest 1065
10:50 AM → 2:20 PM2h 30m nonstop
Local times, typical schedule. Last flown 2026-05-29. Same departure also flew as Southwest 872; its record covers all of them.
77%
chance on time
- On time (history)
- 76%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 76% of the time (38 flights, Jun 2025 to May 2026).
- Never cancelled in 38 scheduled flights.
- 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 (38 flights), so its score leans on the airline's record at this hour.
Limited track record · 38 flights
Find Southwest 1065 fares Opens this date on Aviasales#8 · United 663
2:32 PM → 6:10 PM2h 38m nonstop
Local times, typical schedule. Last flown 2026-05-31.
76%
chance on time
- On time (history)
- 70%
- Cancelled
- 0.0%
- Avg arrival delay
- 23 min
- Arrived on time 70% of the time (10 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.
- 83% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (10 flights), so its score leans on the airline's record at this hour.
Limited track record · 10 flights
Find United 663 fares Opens this date on Aviasales#9 · Southwest 856
1:45 PM → 5:10 PM2h 25m nonstop
Local times, typical schedule. Last flown 2026-04-01.
74%
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 856 fares Opens this date on Aviasales#10 · Southwest 1681
7:40 PM → 11:05 PM2h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31.
65%
chance on time
- On time (history)
- 63%
- Cancelled
- 0.0%
- Avg arrival delay
- 18 min
- Arrived on time 63% of the time (46 flights, Jun 2025 to May 2026).
- Never cancelled in 46 scheduled flights.
- 81% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (46 flights), so its score leans on the airline's record at this hour.
Limited track record · 46 flights
Find Southwest 1681 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines87%
1,006 flights · 88% on time as flown · 0.4% cancel
- Frontier Airlines81%
63 flights · 78% on time as flown · 0.3% cancel
- Southwest Airlines77%
1,524 flights · 77% on time as flown · 0.5% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM94%
914 flights · avg delay 4 min
- 9 AM to noon83%
167 flights · avg delay 9 min
- Noon to 3 PM73%
734 flights · avg delay 17 min
- 3 to 6 PM72%
470 flights · avg delay 18 min
- 6 to 9 PM78%
308 flights · avg delay 13 min
Best day: Saturday (88%). Worst: Friday (81%).
Smarter routing
Nearby airports that run more on time
MRY → DEN 93% chance on time
Monterey Regional Airport to Denver International Airport · 729 flights a year · 54 mi from your airports · yours: 81%
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 volume44%
- Late-arriving aircraft32%
- Airline (crew, maintenance, boarding)22%
- 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
SJC to DEN questions
- What time of day is best to fly SJC to DEN?
- Before 9 AM: 94% of flights arrived on time, against 72% 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 SJC to DEN?
- United, with a season-adjusted 87% chance of operating and arriving on time over 1,006 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 SJC to DEN?
- June (74% on time); the best was November (91%), 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 SJC
- DEN to SJC (return)
- SJC to SAN 74%
- SJC to LAX 87%
- SJC to SEA 83%
- SJC to LAS 80%
- SJC to PHX 83%
- SJC to SNA 87%
- SJC to BUR 84%
- SJC to SLC 92%
- SJC to PDX 85%
- SJC to ONT 84%
- SJC to LGB 86%
- SJC to DFW 81%
Live status: FAA delays and ground stops