Route on-time record
PHX to COS: most on-time flights and the best time to fly
Phoenix (Phoenix Sky Harbor International Airport) to Colorado Springs (City of Colorado Springs Municipal Airport). 993 nonstop flights in Jun 2025 to May 2026, 74% arrived within 15 minutes and 0.1% were cancelled. The most reliable flight number was Southwest 3403 at 7:40 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
PHX → COS
Phoenix to Colorado Springs: 993 nonstop flights a year
On time (12 months)
74%
Cancelled
0.1%
avg delay 14 min
Best time to leave
Before 9 AM
90% on time vs 60% 6 to 9 PM
Most reliable airline
Southwest
74% chance on time
Lowest nonstop fare seen in the next two months: $401 (Southwest 2829 on 2026-10-23). 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 3403
7:40 AM → 10:30 AM1h 50m nonstop
Local times, typical schedule. Last flown 2026-04-06.
90%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 100% 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: 90% on time; 6 to 9 PM: 60%).
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
Limited track record · 33 flights
Find Southwest 3403 fares Opens this date on Aviasales#2 · Southwest 1438
9:45 AM → 12:35 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-30.
79%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 88% of the time (8 flights, Jun 2025 to May 2026).
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 1438 fares Opens this date on Aviasales#3 · Southwest 1197
1:30 PM → 4:10 PM1h 40m nonstop
Local times, typical schedule. Last flown 2026-05-27.
75%
chance on time
- On time (history)
- 81%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 81% of the time (16 flights, Jun 2025 to May 2026).
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
- Short track record (16 flights), so its score leans on the airline's record at this hour.
Limited track record · 16 flights
Find Southwest 1197 fares Opens this date on Aviasales#4 · Southwest 3477
8:50 AM → 11:35 AM1h 45m nonstop
Local times, typical schedule. Last flown 2026-05-29.
75%
chance on time
- On time (history)
- 61%
- Cancelled
- 0.0%
- Avg arrival delay
- 16 min
- Arrived on time 61% of the time (23 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 6 to 9 PM: 60%).
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
- Short track record (23 flights), so its score leans on the airline's record at this hour.
Limited track record · 23 flights
Find Southwest 3477 fares Opens this date on Aviasales#5 · Southwest 4396
9:20 AM → 12:05 PM1h 45m nonstop
Local times, typical schedule. Last flown 2026-05-27.
75%
chance on time
- On time (history)
- 69%
- Cancelled
- 0.0%
- Avg arrival delay
- 18 min
- Arrived on time 69% of the time (16 flights, Jun 2025 to May 2026).
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
- Short track record (16 flights), so its score leans on the airline's record at this hour.
Limited track record · 16 flights
Find Southwest 4396 fares Opens this date on Aviasales#6 · Southwest 2008
9:15 PM → 11:55 PM1h 40m nonstop
Local times, typical schedule. Last flown 2026-04-06.
74%
chance on time
- On time (history)
- 80%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 80% of the time (15 flights, Jun 2025 to May 2026).
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
- 87% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (15 flights), so its score leans on the airline's record at this hour.
Limited track record · 15 flights
Find Southwest 2008 fares Opens this date on Aviasales#7 · Southwest 1139
3:35 PM → 6:15 PM1h 40m nonstop
Local times, typical schedule. Last flown 2026-04-05.
73%
chance on time
- On time (history)
- 78%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 78% of the time (18 flights, Jun 2025 to May 2026).
- Departs inside PHX's trouble window: 43% of its 46 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (18 flights), so its score leans on the airline's record at this hour.
Limited track record · 18 flights
Find Southwest 1139 fares Opens this date on Aviasales#8 · Southwest 351
6:40 PM → 9:20 PM1h 40m nonstop
Local times, typical schedule. Last flown 2026-04-01.
72%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.0%
- Avg arrival delay
- 7 min
- Arrived on time 75% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 60% on time; Before 9 AM: 90%).
- Departs inside PHX's trouble window: 43% of its 46 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 351 fares Opens this date on Aviasales#9 · Southwest 1530
9:25 PM → 12:05 AM1h 40m nonstop
Local times, typical schedule. Last flown 2026-05-31.
72%
chance on time
- On time (history)
- 70%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 70% of the time (30 flights, Jun 2025 to May 2026).
- Never cancelled in 30 scheduled flights.
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
- Short track record (30 flights), so its score leans on the airline's record at this hour.
Limited track record · 30 flights
Find Southwest 1530 fares Opens this date on Aviasales#10 · Southwest 3110
1:55 PM → 4:35 PM1h 40m nonstop
Local times, typical schedule. Last flown 2026-04-06.
72%
chance on time
- On time (history)
- 73%
- Cancelled
- 0.0%
- Avg arrival delay
- 21 min
- Arrived on time 73% of the time (15 flights, Jun 2025 to May 2026).
- Departs outside PHX's trouble window (2 PM to 8 PM, when 43% of its 46 ground stops and delay programs started).
- Short track record (15 flights), so its score leans on the airline's record at this hour.
Limited track record · 15 flights
Find Southwest 3110 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines74%
993 flights · 74% on time as flown · 0.1% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM90%
217 flights · avg delay 6 min
- 9 AM to noon80%
92 flights · avg delay 8 min
- Noon to 3 PM77%
222 flights · avg delay 12 min
- 3 to 6 PM68%
131 flights · avg delay 16 min
- 6 to 9 PM60%
244 flights · avg delay 23 min
- After 9 PM71%
87 flights · avg delay 12 min
Best day: Wednesday (81%). Worst: Monday (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
- Late-arriving aircraft56%
- Airline (crew, maintenance, boarding)35%
- Air traffic control and airport volume8%
- 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
PHX to COS questions
- What time of day is best to fly PHX to COS?
- Before 9 AM: 90% of flights arrived on time, against 60% for departures 6 to 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 PHX to COS?
- Southwest, with a season-adjusted 74% chance of operating and arriving on time over 993 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 PHX to COS?
- June (67% on time); the best was February (90%), 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 PHX
- COS to PHX (return)
- PHX to DEN 77%
- PHX to LAX 83%
- PHX to SEA 83%
- PHX to LAS 79%
- PHX to SAN 74%
- PHX to SLC 83%
- PHX to ORD 77%
- PHX to DFW 80%
- PHX to SFO 71%
- PHX to SNA 80%
- PHX to ATL 82%
- PHX to PDX 79%
Live status: FAA delays and ground stops