Route on-time record
DEN to PHX: most on-time flights and the best time to fly
Denver (Denver International Airport) to Phoenix (Phoenix Sky Harbor International Airport). 8,894 nonstop flights in Jun 2025 to May 2026, 75% arrived within 15 minutes and 0.9% were cancelled. The most reliable flight number was Southwest 1880 at 6:40 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
DEN → PHX
Denver to Phoenix: 8,894 nonstop flights a year
On time (12 months)
75%
Cancelled
0.9%
avg delay 17 min
Best time to leave
Before 9 AM
87% on time vs 61% after 9 PM
Most reliable airline
United
79% chance on time
Lowest nonstop fare seen in the next two months: $110 (Frontier 4765 on 2026-10-28). 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 · Southwest 1880
6:40 AM → 7:40 AM2h 00m nonstop
Local times, typical schedule. Last flown 2026-05-31.
93%
chance on time
- On time (history)
- 100%
- Cancelled
- 2.2%
- Avg arrival delay
- 1 min
- Arrived on time 100% of the time (45 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 87% on time; After 9 PM: 61%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Short track record (45 flights), so its score leans on the airline's record at this hour.
Limited track record · 45 flights
Find Southwest 1880 fares Opens this date on Aviasales#2 · United 1593
9:44 AM → 10:48 AM2h 04m nonstop
Local times, typical schedule. Last flown 2026-05-20.
89%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 91% of the time (116 flights, Jun 2025 to May 2026).
- Never cancelled in 116 scheduled flights.
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Moderate track record · 116 flights
Find United 1593 fares Opens this date on Aviasales#3 · Southwest 2590
9:00 AM → 10:00 AM2h 00m nonstop
Local times, typical schedule. Last flown 2026-04-06.
89%
chance on time
- On time (history)
- 93%
- Cancelled
- 1.3%
- Avg arrival delay
- 5 min
- Arrived on time 93% of the time (74 flights, Jun 2025 to May 2026).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Moderate track record · 74 flights
Find Southwest 2590 fares Opens this date on Aviasales#4 · Southwest 4600
5:30 AM → 6:35 AM2h 05m nonstop
Local times, typical schedule. Last flown 2026-04-06.
89%
chance on time
- On time (history)
- 96%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 96% of the time (25 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 87% on time; After 9 PM: 61%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Short track record (25 flights), so its score leans on the airline's record at this hour.
Limited track record · 25 flights
Find Southwest 4600 fares Opens this date on Aviasales#5 · Southwest 2006
7:40 AM → 8:40 AM2h 00m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 96%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 96% of the time (54 flights, Jun 2025 to May 2026).
- Never cancelled in 54 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 87% on time; After 9 PM: 61%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Limited track record · 54 flights
Find Southwest 2006 fares Opens this date on Aviasales#6 · Southwest 3252
5:50 AM → 6:50 AM2h 00m nonstop
Local times, typical schedule. Last flown 2026-05-30.
88%
chance on time
- On time (history)
- 94%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 94% of the time (31 flights, Jun 2025 to May 2026).
- Never cancelled in 31 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 87% on time; After 9 PM: 61%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Limited track record · 31 flights
Find Southwest 3252 fares Opens this date on Aviasales#7 · Southwest 285
7:00 AM → 8:10 AM2h 10m nonstop
Local times, typical schedule. Last flown 2026-04-06.
86%
chance on time
- On time (history)
- 94%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 94% 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: 87% on time; After 9 PM: 61%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Limited track record · 32 flights
Find Southwest 285 fares Opens this date on Aviasales#8 · United 631
1:25 PM → 2:28 PM2h 03m nonstop
Local times, typical schedule. Last flown 2026-05-20.
85%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.5%
- Avg arrival delay
- 7 min
- Arrived on time 88% of the time (204 flights, Jun 2025 to May 2026).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Lands inside PHX's trouble window: 43% of its 46 ground stops and delay programs started between 2 PM and 8 PM.
Strong track record · 204 flights
Find United 631 fares Opens this date on Aviasales#9 · Frontier 1375
6:30 AM → 7:36 AM2h 06m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
- On time (history)
- 84%
- Cancelled
- 1.0%
- Avg arrival delay
- 13 min
- Arrived on time 84% of the time (309 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 87% on time; After 9 PM: 61%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Strong track record · 309 flights
Find Frontier 1375 fares Opens this date on Aviasales#10 · United 1481
7:45 AM → 8:48 AM2h 03m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
- On time (history)
- 84%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 84% of the time (314 flights, Jun 2025 to May 2026).
- Never cancelled in 314 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 87% on time; After 9 PM: 61%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Strong track record · 314 flights
Find United 1481 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines79%
2,378 flights · 80% on time as flown · 0.4% cancel
- American Airlines77%
959 flights · 77% on time as flown · 0.8% cancel
- Frontier Airlines75%
1,401 flights · 77% on time as flown · 0.7% cancel
- Southwest Airlines72%
3,935 flights · 72% on time as flown · 1.3% cancel
- Envoy Air (sold as American Eagle)69%
203 flights · 69% on time as flown · 0.7% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM87%
1,949 flights · avg delay 12 min
- 9 AM to noon83%
1,538 flights · avg delay 10 min
- Noon to 3 PM78%
1,545 flights · avg delay 16 min
- 3 to 6 PM70%
1,490 flights · avg delay 19 min
- 6 to 9 PM63%
1,663 flights · avg delay 28 min
- After 9 PM61%
709 flights · avg delay 25 min
Best day: Tuesday (80%). Worst: Thursday (73%).
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
- Late-arriving aircraft48%
- Airline (crew, maintenance, boarding)36%
- Air traffic control and airport volume15%
- Severe weather1%
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
DEN to PHX questions
- What time of day is best to fly DEN to PHX?
- Before 9 AM: 87% of flights arrived on time, against 61% for departures after 9 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 DEN to PHX?
- United, with a season-adjusted 79% chance of operating and arriving on time over 2,378 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 DEN to PHX?
- June (65% on time); the best was December (82%), 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 DEN
- PHX to DEN (return)
- DEN to SLC 77%
- DEN to LAX 79%
- DEN to LAS 75%
- DEN to SEA 73%
- DEN to ORD 70%
- DEN to DFW 75%
- DEN to SAN 76%
- DEN to MSP 78%
- DEN to ATL 80%
- DEN to SFO 68%
- DEN to AUS 76%
- DEN to COS 75%
Live status: FAA delays and ground stops