Route Reliability
St. Louis → San Francisco
STL–SFO · 1,735 miles · St. Louis Lambert International Airport to San Francisco International Airport
- 68%
- Arrive within 15 minutes
- 18 min
- Average arrival delay
- 0.9%
- Cancelled
- 804
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines68%462 flights
- 2.Southwest Airlines67%342 flights
What the data says
Morning flights do better here.
STL–SFO flights departing between 9 AM–12 PM arrived on time 78% of the time, versus 36% between 6–9 PM.
Sunday scaries are real for this one.
STL–SFO flights arrived on time 76% of the time on Tuesdays. On Sundays: 62%.
Not much between United Airlines and Southwest Airlines.
On this route they all land within 67% to 68% on time. Pick on schedule and price.
Recent months have been rougher.
STL–SFO flights arrived on time 56% of the time over the last three months in the data, compared with 78% in the three months before that.
Flights on this route
The breakdown
- Mon65%(125 flights)
- Tue76%(105 flights)
- Wed67%(116 flights)
- Thu66%(119 flights)
- Fri69%(123 flights)
- Sat70%(84 flights)
- Sun62%(125 flights)
- 6–9 AM62%(233 flights)
- 9 AM–12 PM78%(189 flights)
- 12–3 PM61%(59 flights)
- 3–6 PM77%(237 flights)
- 6–9 PM36%(78 flights)
- 9 PM–12 AM—(1 flights)
Jun 65% → May 32% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 65% | 82 |
| July 2025 | 61% | 82 |
| August 2025 | 77% | 62 |
| September 2025 | 80% | 60 |
| October 2025 | 61% | 62 |
| November 2025 | 79% | 57 |
| December 2025 | 73% | 60 |
| January 2026 | 90% | 67 |
| February 2026 | 70% | 60 |
| March 2026 | 86% | 59 |
| April 2026 | 48% | 75 |
| May 2026 | 32% | 71 |
Same trip, other airports
Keep nerding
Based on 804 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.