Route on-time record
MSY to IAD: most on-time flights and the best time to fly
New Orleans (Louis Armstrong New Orleans International Airport) to Dulles (Washington Dulles International Airport). 649 nonstop flights in Jun 2025 to May 2026, 91% arrived within 15 minutes and 0.6% were cancelled. The most reliable flight number was United 1392 at 8:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
MSY → IAD
New Orleans to Dulles: 649 nonstop flights a year
On time (12 months)
91%
Cancelled
0.6%
avg delay 7 min
Best time to leave
No clear winner
Most reliable airline
United
91% chance on time
Lowest nonstop fare seen in the next two months: $356 (United 2497 on 2026-10-19). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · United 1392
8:00 AM → 11:32 AM2h 32m nonstop
Local times, typical schedule. Last flown 2026-05-31.
92%
chance on time
- On time (history)
- 92%
- Cancelled
- 0.7%
- Avg arrival delay
- 5 min
- Arrived on time 92% of the time (305 flights, Jun 2025 to May 2026).
Strong track record · 305 flights
Find United 1392 fares Opens this date on Aviasales#2 · United 2497
12:44 PM → 4:16 PM2h 32m nonstop
Local times, typical schedule. Last flown 2026-05-29.
91%
chance on time
- On time (history)
- 92%
- Cancelled
- 0.8%
- Avg arrival delay
- 5 min
- Arrived on time 92% of the time (128 flights, Jun 2025 to May 2026).
- Lands inside IAD's trouble window: 75% of its 63 ground stops and delay programs started between 1 PM and 7 PM.
Moderate track record · 128 flights
Find United 2497 fares Opens this date on Aviasales#3 · United 2265
5:32 PM → 9:01 PM2h 29m nonstop
Local times, typical schedule. Last flown 2026-05-20.
83%
chance on time
- On time (history)
- 71%
- Cancelled
- 0.0%
- Avg arrival delay
- 16 min
- Arrived on time 71% of the time (21 flights, Jun 2025 to May 2026).
- Short track record (21 flights), so its score leans on the airline's record at this hour.
Limited track record · 21 flights
Find United 2265 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines91%
631 flights · 91% on time as flown · 0.6% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM93%
310 flights · avg delay 5 min
- Noon to 3 PM91%
311 flights · avg delay 7 min
Best day: Tuesday (92%). Worst: Monday (86%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Airline (crew, maintenance, boarding)51%
- Air traffic control and airport volume29%
- Late-arriving aircraft15%
- Severe weather6%
Share of delay minutes by the cause airlines report to the US DOT.
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
MSY to IAD questions
- Which airline is most on time from MSY to IAD?
- United, with a season-adjusted 91% chance of operating and arriving on time over 631 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on MSY to IAD?
- May (83% on time); the best was August (94%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from MSY
- IAD to MSY (return)
- MSY to ATL 82%
- MSY to IAH 82%
- MSY to DFW 72%
- MSY to ORD 79%
- MSY to MCO 77%
- MSY to DAL 78%
- MSY to HOU 76%
- MSY to DEN 80%
- MSY to AUS 78%
- MSY to DCA 71%
- MSY to CLT 83%
- MSY to MIA 79%
Live status: FAA delays and ground stops