SAN to STL flight delays & on-time performance
Nonstop flights from San Diego International Airport to St. Louis Lambert International Airport · 1,557 miles · Aug 2025 – Jul 2026
- SAN: Airport closed. Closed, expected to reopen Oct 11 at 13:00 UTC.
On-time arrivals
75%
arrived < 15 min late
Cancelled
0.2%
1 flights
Avg arrival delay
13 min
48 min when late
Airlines
1
473 flights tracked
Key facts
- Flights from San Diego (SAN) to St. Louis (STL) arrived on time 75% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.2% were cancelled, and 7% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 6am did best (93% on time); around 1pm did worst (50%).
- Saturday was the most reliable day to fly (87% on time) and Friday the least (62%).
- The largest source of delay minutes was late-arriving aircraft (61%).
Which airline is most on time from SAN to STL?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Southwest Airlines | 75% | 0.2% | 13 min | 7.5% | 473 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am93%41 flights
- 7am86%65 flights
- 8am87%46 flights
- 9am84%19 flights
- 10am88%44 flights
- 11am75%52 flights
- 12pm79%29 flights
- 1pm50%115 flights
- 6pm69%45 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday65%0.0% cancelled
- Tuesday81%0.0% cancelled
- Wednesday86%0.0% cancelled
- Thursday70%1.6% cancelled
- Friday62%0.0% cancelled
- Saturday87%0.0% cancelled
- Sunday73%0.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft61%
- Airline (crew, maintenance, cleaning, fueling)29%
- Air traffic control & airport congestion10%
- Extreme weather0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather100%
- Airline (crew, maintenance, cleaning, fueling)0%
- Air traffic control & airport congestion0%
- Security0%
SAN to STL: common questions
- How often are SAN to STL flights on time?
- 75% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from San Diego to St. Louis cancelled?
- 0.2% of scheduled flights were cancelled (1 of 473).
- How long are typical delays?
- Across all flights the average arrival delay was 13 min (early arrivals count as zero). Flights that were late arrived 48 min behind schedule on average, and 7.5% of flights were an hour or more late.
- How long is taxi time at SAN?
- Flights on this route spent 18 min taxiing from the gate to takeoff on average.
Related routes
Return trip: STL to SAN — 77% on time
More flights from San Diego
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SAN → STL, nonstop flights by US airlines that report to the DOT. How we calculate this.