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Ranking & search details
1 nonstop, 41 with 1 connection, 6 with 2 · ranked by overall best · 5 hidden by your Most reliable time setting (they leave at other times of day) · showing the top 3
Most reliable time: morning departures (5–11 AM), the window with the best on-time odds for this trip. Turn off “Most reliable” under Departure time in Advanced settings to see every time.
Fares seen on this date: nonstop from 258 · any route from 185 (recent searches, one way, per person; each card opens the live price)
43 matching trips
Why this is our top pick
- This morning flight leaves in the most reliable time of day on this route: its best departures have a 79% reliability rating vs 54% for afternoon departures.
- Compared with the next-best option (United 469 + United 512 on the Boeing 737-800 or Airbus A319), it arrives on time 2 points more often.
- Legroom was comparable across the flights we compared (30–31 in), so it didn't set them apart.
5:00 AM11:35 AMSAT → DCA
United · UA 469 / UA 512
5h 35m1 stop
1h 23m in IAH
One ticket
86%arrive on time93% connections madeCheck fares
5:10 AM11:34 AMSAT → DCA
Delta · DL 2497 / DL 2476
5h 25m1 stop
53m in DTW
One ticket
79%arrive on time90% connections madeCheck fares
Aircraft and legroom reflect the planes each flight has flown recently. Airlines can swap planes and seat maps change, so check the airline’s seat map when you book.
SAT → DCA
San Antonio to Washington: 352 nonstop flights a year
On time (12 months)
90%
Cancelled
2.0%
avg delay 16 min
Best time to leave
No clear winner
Most reliable airline
American
88% chance on time
Lowest nonstop fare seen in the next two months: $258 (American 1718 on 2026-11-29). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- American Airlines88%
352 flights · 90% on time as flown · 2.0% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM90%
352 flights · avg delay 16 min
Best day: Friday (97%). Worst: Tuesday (86%).
Smarter routing
Nearby airports that run more on time
SAT → IAD 93% chance on time
San Antonio International Airport to Washington Dulles International Airport · 636 flights a year · 23 mi from your airports · yours: 88%
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure