Route
SFO → STL
San Francisco International Airport St. Louis Lambert International Airport
Alerts at SFO and STL
How punctual is this route?
- On-time arrivals
- 60.6%
- Less than 15 minutes late
- Cancelled
- 0.9%
- Of scheduled flights
- Average delay when late
- 67 min
- Flights arriving 15+ minutes late
- Flights tracked
- 754
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 58%
- Airline (crew, maintenance, cleaning) 26%
- Air traffic control & airport 16%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 71.7% | 60 |
| October 2025 | 72.1% | 62 |
| November 2025 | 53.6% | 57 |
| December 2025 | 60.7% | 61 |
| January 2026 | 90.9% | 69 |
| February 2026 | 69.5% | 59 |
| March 2026 | 81.0% | 60 |
| April 2026 | 54.7% | 77 |
| May 2026 | 46.5% | 71 |
| June 2026 | 50.0% | 60 |
| July 2026 | 43.3% | 62 |
| August 2026 | 32.7% | 56 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Southwest Airlines | 342 | 40.2% | 0.3% | 63 min |
| SkyWest Airlines | 235 | 77.6% | 2.6% | 89 min |
| United Airlines | 177 | 77.8% | 0.0% | 58 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
UA2090
23% late · 82 flights
-
UA336
13% late · 77 flights
-
OO5736
9% late · 55 flights
-
OO6046
31% late · 53 flights
-
WN570
25% late · 53 flights
-
WN4219
88% late · 50 flights
-
WN2957
67% late · 42 flights
-
OO5739
28% late · 37 flights
-
WN575
38% late · 30 flights
-
WN3564
85% late · 28 flights
-
WN368
29% late · 28 flights
-
WN1417
78% late · 27 flights
-
WN3322
52% late · 27 flights
-
OO5460
20% late · 25 flights
-
OO5304
14% late · 24 flights
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