San Antonio (SAT) to Newark (EWR): On-Time Performance
Data through July 2026
When you fly SAT to EWR matters as much as anything else about the booking: the route swung from 98% on-time in April 2026 to just 55% in May 2025. Across the full period the route averages 82% on-time against a national 78%.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 19 min
- completed flights
- Cancelled
- 1.5%
- Flights/day
- 1.6
- last 12 months
- Duration
- 3h 48m
- scheduled
- Distance
- 1,569 mi
Best airline from SAT to EWR
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlinesmost reliable | 84% | 16 min | 1.2% | 1,151 |
| Spirit Airlines | 69% | 38 min | 3.6% | 138 |
Monthly on-time trend
Best time to fly from SAT to EWR
Aim for departures around 6 a.m. (94% on-time); avoid 1 p.m. departures (66%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 82% | 17 min |
| Tuesdaybest | 88% | 18 min |
| Wednesday | 87% | 15 min |
| Thursday | 76% | 17 min |
| Friday | 79% | 21 min |
| Saturday | 84% | 25 min |
| Sunday | 82% | 19 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft15%
- Airline operations32%
- National airspace system52%
- Weather1%
Frequently asked questions
- How often are flights from SAT to EWR delayed?
- 18% of SAT–EWR flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 19 minutes.
- Which airline is most reliable from SAT to EWR?
- United Airlines has the best on-time record on this route at 84%, based on 1,151 flights. 2 airlines flew SAT–EWR frequently enough to compare in this period.
- What is the best time of day to fly from SAT to EWR?
- Departures around 6 a.m. have the best record (94% on-time), while departures around 1 p.m. have the worst (66%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SAT to EWR?
- The scheduled SAT–EWR flight time averages 3h 48m over 1,569 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are SAT to EWR flights cancelled?
- 1.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from SAT to EWR?
- May 2025 was the roughest month in this dataset, with only 55% of arrivals on time. The best was April 2026 at 98%. If your dates are flexible, that 43-point gap is worth planning around.
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Based on 1,289 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.