Route · SFO → STL · 2020–2025 BTS data
San Francisco to St. Louis
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SFO to STL (San Francisco to St. Louis) ranks #4213 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 74.8%
- On-time
- -4.2 pts
- vs US avg
- 57 min
- Delay when late
- 1,411
- Flights
- #4213 of 4927
- Corpus placement
Cancelled
1.1%
Best Month
Mar 2020 95%
Worst Month
Nov 2025 54%
Distance
1,735 mi
Carriers
8
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 61 | 24 | 0 | 0 | WN,UA,OO |
| Nov 2025 | 57 | 26 | 0 | 1 | UA,WN |
| Oct 2025 | 62 | 17 | 0 | 1 | OO,UA,WN |
| Sep 2025 | 60 | 17 | 0 | 0 | UA,WN,OO |
| Aug 2025 | 62 | 14 | 0 | 0 | WN,UA |
| Jul 2025 | 83 | 29 | 1 | 0 | UA,WN |
| Jun 2025 | 82 | 17 | 0 | 0 | UA,WN |
| May 2025 | 82 | 23 | 0 | 1 | UA,WN |
| Apr 2025 | 60 | 16 | 0 | 1 | UA,WN |
| Mar 2025 | 62 | 12 | 0 | 0 | UA,WN |
| Feb 2025 | 54 | 17 | 0 | 1 | UA,WN |
| Jan 2025 | 59 | 13 | 3 | 0 | UA,WN |
| Dec 2024 | 64 | 22 | 1 | 0 | UA,WN |
| Nov 2024 | 77 | 24 | 0 | 0 | UA,WN |
| Oct 2024 | 79 | 15 | 0 | 1 | UA,WN |
| Sep 2024 | 80 | 24 | 0 | 0 | WN,OO,UA |
| Aug 2024 | 53 | 13 | 0 | 1 | WN,UA |
| Jul 2024 | 31 | 5 | 0 | 0 | WN |
| Jun 2024 | 30 | 8 | 0 | 0 | WN |
| May 2024 | 31 | 6 | 0 | 0 | WN |
| Mar 2020 | 58 | 3 | 6 | 0 | WN,OO,UA |
| Feb 2020 | 58 | 4 | 1 | 0 | WN,OO |
| Jan 2020 | 66 | 7 | 3 | 0 | WN,OO,UA |
SFO–STL seasonal on-time pattern
Best: March (87.5%) · weakest: November (62.7%)
Strongest calendar month
March
87.5% on-time · ~60 flights/mo
Busiest calendar month
October
~71 flights/mo avg
Weakest calendar month
November
62.7% on-time · ~67 flights/mo
Cancellation Rate
1.1%
15 of 1,411 flights
Diversion Rate
0.5%
7 of 1,411 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SFO - San Francisco
Full on-time, delay-cause, and seasonal performance for San Francisco, CA.
SFO on-time profileSTL - St. Louis
Full on-time, delay-cause, and seasonal performance for St. Louis, MO.
STL on-time profileCompare the two airports
See SFO and STL side by side on delays, cancellations, and reliability.
Compare SFO vs STLOrigin-hub reliability standing
Softer reliability from SFO
Among 73 routes leaving SFO, only 3 (including this one) clear below 75% on-time, while 20 stay ≥85% and 50 sit mid-band. Travelers comparing SFO options should weigh this 74.8% print against those peers · fleet on-time rank #4514 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to SFO–STL.
Routes with a similar on-time rate
What the Data Says About SFO to STL
On-time performance on the SFO to STL pairing (San Francisco to St. Louis) trails a chunk of the network: 74.8% of 1,411 tracked flights arrived on schedule, with a 56.8-minute average delay on the ones that ran late. The route spans about 1,735 miles across 8 carriers. Cancellations over the trailing 24 months hit 1.1% (15 of 1,411 flights), with 0.5% diverted.
The monthly split is wide on this route: Mar 2020 posted the strongest performance at 95% on-time, while Nov 2025 came in at just 54% - a 40-point swing worth factoring into travel timing.
On the multi-year calendar, SFO–STL peaks in March at 87.5% on-time while October carries the heaviest traffic (~71 flights per month) ; the softest month is November at 62.7%, a 24.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does SFO to STL rank among US routes by traffic? ▼
How often are flights delayed from SFO to STL? ▼
What is the cancellation rate for SFO to STL? ▼
How far is the flight from SFO to STL? ▼
When is the best time to fly from SFO to STL? ▼
Airports on this route
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Using SFO–STL data
SFO–STL sits 4.2 pts below the national 79% average; check the seasonal chart and airport profiles before treating the headline as typical.
- Compare SFO and STL airport profiles: delay causes and top routes differ even on the same corridor. SFO airport
- If your dates flex, March (87.5% on-time) beats November (62.7%) on this corridor. Seasonal chart
- 4 other routes post a similar 74.8% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.