Route Reliability
Chicago → San Francisco
ORD–SFO · 1,846 miles · Chicago O'Hare International Airport to San Francisco International Airport
- 71%
- Arrive within 15 minutes
- 14 min
- Average arrival delay
- 1.3%
- Cancelled
- 5,607
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines73%3,772 flights
- 2.American Airlines67%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.
ORD–SFO flights departing between 6–9 AM arrived on time 84% of the time, versus 56% between 6–9 PM.
Sunday scaries are real for this one.
ORD–SFO flights arrived on time 76% of the time on Tuesdays. On Sundays: 66%.
United Airlines has a slight edge here.
United Airlines arrived on time 73% of the time on this route; American Airlines managed 67%.
Slipping a little lately.
ORD–SFO flights arrived on time 67% of the time over the last three months in the data, compared with 72% 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
- Mon67%(809 flights)
- Tue76%(773 flights)
- Wed70%(774 flights)
- Thu73%(807 flights)
- Fri69%(815 flights)
- Sat75%(737 flights)
- Sun66%(815 flights)
- 6–9 AM84%(1312 flights)
- 9 AM–12 PM70%(923 flights)
- 12–3 PM75%(811 flights)
- 3–6 PM69%(1005 flights)
- 6–9 PM56%(1148 flights)
- 9 PM–12 AM67%(331 flights)
Jun 78% → May 61% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 78% | 502 |
| July 2025 | 66% | 519 |
| August 2025 | 74% | 508 |
| September 2025 | 78% | 490 |
| October 2025 | 72% | 520 |
| November 2025 | 70% | 401 |
| December 2025 | 67% | 390 |
| January 2026 | 75% | 325 |
| February 2026 | 74% | 355 |
| March 2026 | 75% | 447 |
| April 2026 | 66% | 516 |
| May 2026 | 61% | 557 |
Same trip, other airports
Keep nerding
Based on 5,607 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.