Route on-time record
LGA to IAD: most on-time flights and the best time to fly
New York (LaGuardia Airport) to Dulles (Washington Dulles International Airport). 979 nonstop flights in Jun 2025 to May 2026, 74% arrived within 15 minutes and 7.0% were cancelled. The most reliable flight number was Republic 3656 at 6:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
LGA → IAD
New York to Dulles: 979 nonstop flights a year
On time (12 months)
74%
Cancelled
7.0%
avg delay 22 min
Best time to leave
Before 9 AM
92% on time vs 59% noon to 3 PM
Most reliable airline
Republic
69% chance on time
Lowest nonstop fare seen in the next two months: $129 (United 6285 on 2026-11-26). 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 · Republic 3656 · sold as American Eagle, Delta Connection or United Express
6:00 AM → 7:27 AM1h 27m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Republic 3413; its record covers all of them.
86%
chance on time
- On time (history)
- 92%
- Cancelled
- 5.1%
- Avg arrival delay
- 8 min
- Arrived on time 92% of the time (224 flights, Jun 2025 to May 2026).
- Cancelled 5.1% of the time (12 of 236).
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; Noon to 3 PM: 59%).
- Departs outside LGA's trouble window (noon to 6 PM, when 54% of its 285 ground stops and delay programs started).
Strong track record · 224 flights
Find 6:00 AM flight fares Opens this date on Aviasales#2 · Republic 3516 · sold as American Eagle, Delta Connection or United Express
10:27 AM → 11:53 AM1h 28m nonstop
Local times, typical schedule. Last flown 2026-05-18.
73%
chance on time
- On time (history)
- 80%
- Cancelled
- 9.1%
- Avg arrival delay
- 6 min
- Arrived on time 80% of the time (30 flights, Jun 2025 to May 2026).
- Cancelled 9.1% of the time (3 of 33).
- Departs outside LGA's trouble window (noon to 6 PM, when 54% of its 285 ground stops and delay programs started).
- Short track record (30 flights), so its score leans on the airline's record at this hour.
Limited track record · 30 flights
Find 10:27 AM flight fares Opens this date on Aviasales#3 · Republic 3535 · sold as American Eagle, Delta Connection or United Express
7:29 PM → 9:00 PM1h 31m nonstop
Local times, typical schedule. Last flown 2026-05-20. Same departure also flew as Republic 3540; its record covers all of them.
67%
chance on time
- On time (history)
- 73%
- Cancelled
- 9.1%
- Avg arrival delay
- 26 min
- Arrived on time 73% of the time (199 flights, Jun 2025 to May 2026).
- Cancelled 9.1% of the time (20 of 219).
- Departs outside LGA's trouble window (noon to 6 PM, when 54% of its 285 ground stops and delay programs started).
- 70% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 199 flights
Find 7:29 PM flight fares Opens this date on Aviasales#4 · Republic 3688 · sold as American Eagle, Delta Connection or United Express
2:59 PM → 4:28 PM1h 29m nonstop
Local times, typical schedule. Last flown 2026-05-31.
56%
chance on time
- On time (history)
- 60%
- Cancelled
- 6.6%
- Avg arrival delay
- 34 min
- Arrived on time 60% of the time (271 flights, Jun 2025 to May 2026).
- Cancelled 6.6% of the time (19 of 290).
- Leaves in this route's least on-time window (Noon to 3 PM: 59% on time; Before 9 AM: 92%).
- Departs inside LGA's trouble window: 54% of its 285 ground stops and delay programs started between noon and 6 PM.
Strong track record · 271 flights
Find 2:59 PM flight fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Republic Airways (sold as American Eagle, Delta Connection or United Express)69%
976 flights · 75% on time as flown · 7.1% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM92%
267 flights · avg delay 9 min
- 9 AM to noon82%
127 flights · avg delay 13 min
- Noon to 3 PM59%
331 flights · avg delay 34 min
- 6 to 9 PM73%
251 flights · avg delay 26 min
Best day: Saturday (86%). Worst: Friday (76%).
Smarter routing
Nearby airports that run more on time
ISP → BWI 83% chance on time
Long Island MacArthur Airport to Baltimore/Washington International Thurgood Marshall Airport · 1,201 flights a year · 85 mi from your airports · yours: 69%
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
- Late-arriving aircraft52%
- Air traffic control and airport volume28%
- Airline (crew, maintenance, boarding)17%
- Severe weather3%
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
LGA to IAD questions
- What time of day is best to fly LGA to IAD?
- Before 9 AM: 92% of flights arrived on time, against 59% for departures noon to 3 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from LGA to IAD?
- Republic, with a season-adjusted 69% chance of operating and arriving on time over 976 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 LGA to IAD?
- July (71% on time); the best was February (89%), 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 LGA
- IAD to LGA (return)
- LGA to ORD 67%
- LGA to ATL 76%
- LGA to BOS 73%
- LGA to DFW 70%
- LGA to MIA 70%
- LGA to MCO 69%
- LGA to DCA 68%
- LGA to DEN 71%
- LGA to FLL 68%
- LGA to CLT 77%
- LGA to IAH 76%
- LGA to DTW 78%
Live status: FAA delays and ground stops