Route on-time record
IAD to EWR: most on-time flights and the best time to fly
Dulles (Washington Dulles International Airport) to Newark (Newark Liberty International Airport). 1,473 nonstop flights in Jun 2025 to May 2026, 73% arrived within 15 minutes and 2.2% were cancelled. The most reliable flight number was United 2669 at 6:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
IAD → EWR
Dulles to Newark: 1,473 nonstop flights a year
On time (12 months)
73%
Cancelled
2.2%
avg delay 26 min
Best time to leave
Before 9 AM
85% on time vs 51% 3 to 6 PM
Most reliable airline
United
72% chance on time
Lowest nonstop fare seen in the next two months: $114 (United 1998 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 2669
6:00 AM → 7:17 AM1h 17m nonstop
Local times, typical schedule. Last flown 2026-05-31.
93%
chance on time
- On time (history)
- 96%
- Cancelled
- 2.3%
- Avg arrival delay
- 6 min
- Arrived on time 96% of the time (293 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 85% on time; 3 to 6 PM: 51%).
- Departs outside IAD's trouble window (1 PM to 7 PM, when 75% of its 63 ground stops and delay programs started).
Strong track record · 293 flights
Find United 2669 fares Opens this date on Aviasales#2 · United 2396
8:23 AM → 9:59 AM1h 36m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 93% of the time (84 flights, Jun 2025 to May 2026).
- Never cancelled in 84 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 85% on time; 3 to 6 PM: 51%).
- Departs outside IAD's trouble window (1 PM to 7 PM, when 75% of its 63 ground stops and delay programs started).
Moderate track record · 84 flights
Find United 2396 fares Opens this date on Aviasales#3 · United 1997
10:30 PM → 11:56 PM1h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31.
72%
chance on time
- On time (history)
- 73%
- Cancelled
- 2.9%
- Avg arrival delay
- 22 min
- Arrived on time 73% of the time (267 flights, Jun 2025 to May 2026).
- Departs outside IAD's trouble window (1 PM to 7 PM, when 75% of its 63 ground stops and delay programs started).
Strong track record · 267 flights
Find United 1997 fares Opens this date on Aviasales#4 · United 1498
12:35 PM → 2:01 PM1h 26m nonstop
Local times, typical schedule. Last flown 2026-05-31.
69%
chance on time
- On time (history)
- 73%
- Cancelled
- 0.0%
- Avg arrival delay
- 20 min
- Arrived on time 73% of the time (11 flights, Jun 2025 to May 2026).
- Departs outside IAD's trouble window (1 PM to 7 PM, when 75% of its 63 ground stops and delay programs started).
- Lands inside EWR's trouble window: 65% of its 259 ground stops and delay programs started between 1 PM and 7 PM.
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find United 1498 fares Opens this date on Aviasales#5 · United 1831
5:42 PM → 7:10 PM1h 29m nonstop
Local times, typical schedule. Last flown 2026-05-31.
54%
chance on time
- On time (history)
- 64%
- Cancelled
- 2.5%
- Avg arrival delay
- 38 min
- Arrived on time 64% of the time (118 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 51% on time; Before 9 AM: 85%).
- Departs inside IAD's trouble window: 75% of its 63 ground stops and delay programs started between 1 PM and 7 PM.
Moderate track record · 118 flights
Find United 1831 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines72%
1,440 flights · 73% on time as flown · 2.2% cancel
- Republic Airways (sold as American Eagle, Delta Connection or United Express)71%
33 flights · 71% on time as flown · 2.9% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM85%
678 flights · avg delay 16 min
- 3 to 6 PM51%
384 flights · avg delay 53 min
- After 9 PM75%
366 flights · avg delay 18 min
Best day: Wednesday (76%). Worst: Thursday (70%).
Smarter routing
Nearby airports that run more on time
DCA → EWR 87% chance on time
Ronald Reagan Washington National Airport to Newark Liberty International Airport · 333 flights a year · 23 mi from your airports · yours: 72%
BWI → ISP 75% chance on time
Baltimore/Washington International Thurgood Marshall Airport to Long Island MacArthur Airport · 1,203 flights a year · 101 mi from your airports · yours: 72%
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
- Air traffic control and airport volume39%
- Late-arriving aircraft28%
- Airline (crew, maintenance, boarding)18%
- Severe weather14%
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
IAD to EWR questions
- What time of day is best to fly IAD to EWR?
- Before 9 AM: 85% of flights arrived on time, against 51% for departures 3 to 6 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 IAD to EWR?
- United, with a season-adjusted 72% chance of operating and arriving on time over 1,440 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 IAD to EWR?
- July (58% on time); the best was February (84%), 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 IAD
- EWR to IAD (return)
- IAD to ATL 78%
- IAD to DEN 81%
- IAD to SFO 79%
- IAD to LAX 80%
- IAD to MCO 81%
- IAD to CLT 83%
- IAD to ORD 75%
- IAD to SEA 76%
- IAD to DFW 77%
- IAD to IAH 83%
- IAD to BOS 75%
- IAD to TPA 79%
Live status: FAA delays and ground stops