Route Reliability
Baltimore → San Antonio
BWI–SAT · 1,407 miles · Baltimore/Washington International Thurgood Marshall Airport to San Antonio International Airport
- 77%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 1.3%
- Cancelled
- 748
- Flights in the data
Data through May 2026.
Airlines on this route
- Southwest Airlines78% on time · 738 flights
- Spirit Airlines50% on time · 10 flights
Too little history on this route to call a winner. We rank airlines only after 100 flights each.
What the data says
Morning-you made the right choice.
BWI–SAT flights departing between 6–9 AM arrived on time 91% of the time, versus 56% between 9 PM–12 AM.
Saturdays have been rough.
BWI–SAT flights arrived on time 86% of the time on Tuesdays and just 70% on Saturdays. That gap is worth planning around.
Recent months have been rougher.
BWI–SAT flights arrived on time 74% of the time over the last three months in the data, compared with 81% in the three months before that.
Flights on this route
The breakdown
- Mon80%(125 flights)
- Tue86%(106 flights)
- Wed80%(102 flights)
- Thu76%(117 flights)
- Fri75%(126 flights)
- Sat70%(74 flights)
- Sun71%(87 flights)
- 6–9 AM91%(161 flights)
- 9 AM–12 PM88%(136 flights)
- 12–3 PM82%(72 flights)
- 3–6 PM65%(94 flights)
- 6–9 PM69%(247 flights)
- 9 PM–12 AM56%(27 flights)
Jun 59% → May 60% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 59% | 86 |
| July 2025 | 75% | 83 |
| August 2025 | 84% | 70 |
| September 2025 | 86% | 69 |
| October 2025 | 83% | 75 |
| November 2025 | 88% | 60 |
| December 2025 | 76% | 70 |
| January 2026 | 76% | 37 |
| February 2026 | 91% | 32 |
| March 2026 | 82% | 51 |
| April 2026 | 79% | 52 |
| May 2026 | 60% | 52 |
Same trip, other airports
Keep nerding
Based on 748 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.