BWI to SAT flight delays & on-time performance
Nonstop flights from Baltimore/Washington International Thurgood Marshall Airport to San Antonio International Airport · 1,407 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at BWI or SAT right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Baltimore (BWI) to San Antonio (SAT) arrived on time 77% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.6% 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 10am did best (93% on time); around 3pm did worst (60%).
- Tuesday was the most reliable day to fly (82% on time) and Saturday the least (64%).
- The largest source of delay minutes was late-arriving aircraft (49%).
Which airline is most on time from BWI to SAT?
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 | 77% | 1.6% | 14 min | 6.8% | 732 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 8am90%125 flights
- 9am82%78 flights
- 10am93%61 flights
- 11am89%18 flights
- 12pm88%24 flights
- 1pm75%44 flights
- 2pm73%30 flights
- 3pm60%35 flights
- 5pm66%37 flights
- 6pm71%71 flights
- 7pm69%80 flights
- 8pm69%102 flights
- 9pm50%18 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday76%2.5% cancelled
- Tuesday82%1.9% cancelled
- Wednesday82%1.0% cancelled
- Thursday80%0.8% cancelled
- Friday77%0.8% cancelled
- Saturday64%1.5% cancelled
- Sunday71%3.4% 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 aircraft49%
- Airline (crew, maintenance, cleaning, fueling)31%
- Air traffic control & airport congestion16%
- Extreme weather3%
- Security1%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather83%
- Airline (crew, maintenance, cleaning, fueling)17%
- Air traffic control & airport congestion0%
- Security0%
BWI to SAT: common questions
- How often are BWI to SAT flights on time?
- 77% 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 Baltimore to San Antonio cancelled?
- 1.6% of scheduled flights were cancelled (12 of 732).
- How long are typical delays?
- Across all flights the average arrival delay was 14 min (early arrivals count as zero). Flights that were late arrived 55 min behind schedule on average, and 6.8% of flights were an hour or more late.
- How long is taxi time at BWI?
- Flights on this route spent 15 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SAT to BWI — 81% on time
More flights from Baltimore
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: BWI → SAT, nonstop flights by US airlines that report to the DOT. How we calculate this.