Route Reliability
San Francisco → Chicago
SFO–ORD · 1,846 miles · San Francisco International Airport to Chicago O'Hare International Airport
- 78%
- Arrive within 15 minutes
- 9 min
- Average arrival delay
- 1.3%
- Cancelled
- 5,609
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines80%3,774 flights
- 2.American Airlines74%1,755 flights
Not enough history to rank: Alaska Airlines (80 flights). We rank airlines only after 100 flights on the route.
What the data says
Morning flights do better here.
SFO–ORD flights departing between 3–6 AM arrived on time 95% of the time, versus 61% between 12–3 PM.
Monday is the weak spot.
SFO–ORD flights arrived on time 83% of the time on Tuesdays. On Mondays: 73%.
United Airlines has a slight edge here.
United Airlines arrived on time 80% of the time on this route; American Airlines managed 74%.
Slipping a little lately.
SFO–ORD flights arrived on time 74% of the time over the last three months in the data, compared with 80% in the three months before that.
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
- Mon73%(798 flights)
- Tue83%(766 flights)
- Wed78%(769 flights)
- Thu78%(804 flights)
- Fri76%(801 flights)
- Sat80%(751 flights)
- Sun75%(814 flights)
- 12–3 AM83%(71 flights)
- 3–6 AM95%(240 flights)
- 6–9 AM89%(1344 flights)
- 9 AM–12 PM72%(722 flights)
- 12–3 PM61%(1107 flights)
- 3–6 PM76%(680 flights)
- 6–9 PM83%(241 flights)
- 9 PM–12 AM79%(1098 flights)
Jun 75% → May 74% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 75% | 501 |
| July 2025 | 72% | 514 |
| August 2025 | 77% | 505 |
| September 2025 | 84% | 485 |
| October 2025 | 82% | 522 |
| November 2025 | 79% | 401 |
| December 2025 | 81% | 387 |
| January 2026 | 75% | 327 |
| February 2026 | 86% | 357 |
| March 2026 | 77% | 443 |
| April 2026 | 73% | 506 |
| May 2026 | 74% | 555 |
Same trip, other airports
Keep nerding
Based on 5,609 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.