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10 nonstop, 33 with 1 connection, 6 with 2 · ranked by overall best · 25 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 250 · any route from 155 (recent searches, one way, per person; each card opens the live price)
24 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 an 82% reliability rating vs 70% for midday departures.
- United trips we compared arrive on time 84% of the time on average, 2 points more often than American (82%).
- Compared with the next-best option (United 1849 on the Boeing 787-9), it arrives on time 13 points more often.
6:15 AM5:32 PMSFO → IAD
United · UA 1233 / UA 2853
8h 17m1 stop
2h 06m in DEN
One ticket
87%arrive on time97% 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.
SFO → IAD
San Francisco to Dulles: 2,829 nonstop flights a year
On time (12 months)
82%
Cancelled
0.7%
avg delay 12 min
Best time to leave
Before 9 AM
86% on time vs 75% 9 AM to noon
Most reliable airline
United
83% chance on time
Lowest nonstop fare seen in the next two months: $250 (United 1531 on 2026-11-22). 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.
- United Airlines83%
2,671 flights · 84% on time as flown · 0.7% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM86%
527 flights · avg delay 11 min
- 9 AM to noon75%
445 flights · avg delay 16 min
- Noon to 3 PM76%
424 flights · avg delay 21 min
- 3 to 6 PM85%
303 flights · avg delay 9 min
- After 9 PM84%
1,130 flights · avg delay 9 min
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