Route Reliability
San Diego → Chicago
SAN–ORD · 1,723 miles · San Diego International Airport to Chicago O'Hare International Airport
- 79%
- Arrive within 15 minutes
- 8 min
- Average arrival delay
- 1.3%
- Cancelled
- 3,742
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines83%1,675 flights
- 2.American Airlines78%1,382 flights
- 3.Alaska Airlines76%605 flights
Not enough history to rank: Frontier Airlines (80 flights). We rank airlines only after 100 flights on the route.
What the data says
The late departure is the smart one here.
SAN–ORD flights departing between 9 PM–12 AM arrived on time 95% of the time, versus 66% between 12–3 PM.
Sunday scaries are real for this one.
SAN–ORD flights arrived on time 85% of the time on Tuesdays. On Sundays: 72%.
United Airlines runs this route best.
United Airlines arrived on time 83% of the time on this route; Alaska Airlines managed 76%.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon78%(535 flights)
- Tue85%(499 flights)
- Wed81%(499 flights)
- Thu79%(544 flights)
- Fri77%(544 flights)
- Sat80%(487 flights)
- Sun72%(555 flights)
- 6–9 AM86%(930 flights)
- 9 AM–12 PM82%(527 flights)
- 12–3 PM66%(971 flights)
- 3–6 PM74%(756 flights)
- 9 PM–12 AM95%(479 flights)
Jun 76% → May 84% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 76% | 314 |
| July 2025 | 72% | 328 |
| August 2025 | 72% | 312 |
| September 2025 | 84% | 268 |
| October 2025 | 84% | 353 |
| November 2025 | 74% | 305 |
| December 2025 | 78% | 301 |
| January 2026 | 78% | 242 |
| February 2026 | 87% | 241 |
| March 2026 | 75% | 313 |
| April 2026 | 80% | 327 |
| May 2026 | 84% | 359 |
Same trip, other airports
Keep nerding
Based on 3,742 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.