Santa Ana (SNA) to Chicago (ORD): On-Time Performance
Data through May 2026
When you fly SNA to ORD matters as much as anything else about the booking: the route swung from 87% on-time in October 2024 to just 68% in March 2026. Across the full period the route averages 79% on-time against a national 78%.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 16 min
- completed flights
- Cancelled
- 0.7%
- Flights/day
- 6.1
- last 12 months
- Duration
- 4h 10m
- scheduled
- Distance
- 1,726 mi
Best airline from SNA to ORD
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 82% | 12 min | 0.3% | 2,158 |
| American Airlines | 77% | 20 min | 1.1% | 2,168 |
Monthly on-time trend
Best time to fly from SNA to ORD
Aim for departures around 7 a.m. (91% on-time); avoid 3 p.m. departures (65%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 78% | 19 min |
| Tuesdaybest | 85% | 12 min |
| Wednesday | 82% | 13 min |
| Thursday | 78% | 17 min |
| Friday | 77% | 18 min |
| Saturday | 83% | 16 min |
| Sunday | 70% | 19 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft38%
- Airline operations30%
- National airspace system28%
- Weather5%
Frequently asked questions
- How often are flights from SNA to ORD delayed?
- 21% of SNA–ORD 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 16 minutes.
- Which airline is most reliable from SNA to ORD?
- United Airlines has the best on-time record on this route at 82%, based on 2,158 flights. 2 airlines flew SNA–ORD frequently enough to compare in this period.
- What is the best time of day to fly from SNA to ORD?
- Departures around 7 a.m. have the best record (91% on-time), while departures around 3 p.m. have the worst (65%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SNA to ORD?
- The scheduled SNA–ORD flight time averages 4h 10m over 1,726 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are SNA to ORD flights cancelled?
- 0.7% 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 SNA to ORD?
- March 2026 was the roughest month in this dataset, with only 68% of arrivals on time. The best was October 2024 at 87%. If your dates are flexible, that 19-point gap is worth planning around.
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Based on 4,326 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.