Chicago (ORD) to Phoenix (PHX): On-Time Performance
Data through May 2026
Chicago (ORD) to Phoenix (PHX) effectively runs on two schedules. In October 2024, 89% of arrivals were on time; in July 2025 that fell to 64% — a 25-point seasonal swing. Across the full period the route averages 77% on-time against a national 78%. Morning departures also hold up better than evening ones (84% vs 68%), which matters most in the rough months.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 18 min
- completed flights
- Cancelled
- 1.1%
- Flights/day
- 15
- last 12 months
- Duration
- 3h 56m
- scheduled
- Distance
- 1,440 mi
Best airline from ORD to PHX
4 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 82% | 12 min | 0.5% | 3,919 |
| American Airlines | 77% | 20 min | 1.4% | 5,967 |
| Southwest Airlines | 68% | 22 min | 1.1% | 923 |
| Frontier Airlines | 64% | 33 min | 3.3% | 482 |
Monthly on-time trend
Best time to fly from ORD to PHX
Aim for departures around 6 a.m. (92% on-time); avoid 10 p.m. departures (60%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 21 min |
| Tuesdaybest | 82% | 17 min |
| Wednesday | 79% | 16 min |
| Thursday | 77% | 17 min |
| Friday | 74% | 21 min |
| Saturday | 80% | 14 min |
| Sunday | 75% | 18 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft47%
- Airline operations33%
- National airspace system15%
- Weather5%
Frequently asked questions
- How often are flights from ORD to PHX delayed?
- 23% of ORD–PHX flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 18 minutes.
- Which airline is most reliable from ORD to PHX?
- United Airlines has the best on-time record on this route at 82%, based on 3,919 flights. 4 airlines flew ORD–PHX frequently enough to compare in this period.
- What is the best time of day to fly from ORD to PHX?
- Departures around 6 a.m. have the best record (92% on-time), while departures around 10 p.m. have the worst (60%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ORD to PHX?
- The scheduled ORD–PHX flight time averages 3h 56m over 1,440 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are ORD to PHX flights cancelled?
- 1.1% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from ORD to PHX?
- July 2025 was the roughest month in this dataset, with only 64% of arrivals on time. The best was October 2024 at 89%. If your dates are flexible, that 25-point gap is worth planning around.
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Based on 11,291 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.