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Ranking & search details
10 nonstop, 35 with 1 connection, 6 with 2 · ranked by overall best · 50 hidden by your Most reliable time setting (they leave at other times of day)
Most reliable time: afternoon departures (2–6 PM), 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 160 · any route from 115 (recent searches, one way, per person; each card opens the live price)
1 matching trip
Why this is our top pick
- This afternoon flight leaves in the most reliable time of day on this route: its best departures have an 88% reliability rating vs 78% for midday departures.
- United trips we compared arrive on time 84% of the time on average, 3 points more often than American and Delta (82%).
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.
IAD → LAX
Dulles to Los Angeles: 2,427 nonstop flights a year
On time (12 months)
80%
Cancelled
0.8%
avg delay 14 min
Best time to leave
Noon to 3 PM
89% on time vs 72% 6 to 9 PM
Most reliable airline
United
81% chance on time
Lowest nonstop fare seen in the next two months: $160 (United 1689 on 2026-11-13). 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 Airlines81%
2,293 flights · 82% on time as flown · 0.9% cancel
- American Airlines72%
54 flights · 69% on time as flown · 0.6% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM87%
570 flights · avg delay 8 min
- Noon to 3 PM89%
365 flights · avg delay 4 min
- 3 to 6 PM73%
452 flights · avg delay 27 min
- 6 to 9 PM72%
641 flights · avg delay 18 min
- After 9 PM82%
337 flights · avg delay 9 min
Best day: Tuesday (85%). Worst: Saturday (79%).
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