Newark (EWR) to Washington (IAD): On-Time Performance
Data through July 2026
Newark (EWR) to Washington (IAD) effectively runs on two schedules. In May 2026, 87% of arrivals were on time; in July 2025 that fell to 48% — a 39-point seasonal swing. Across the full period the route averages 72% on-time against a national 78%. Morning departures also hold up better than evening ones (94% vs 63%), which matters most in the rough months.
- On-time
- 72%
- arrived <15 min late
- Avg delay
- 22 min
- completed flights
- Cancelled
- 2.5%
- Flights/day
- 4.2
- last 12 months
- Duration
- 1h 23m
- scheduled
- Distance
- 212 mi
Best airline from EWR to IAD
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 76% | 16 min | 6.9% | 144 |
| United Airlines | 72% | 23 min | 2.3% | 2,981 |
Monthly on-time trend
Best time to fly from EWR to IAD
Aim for departures around 5 a.m. (97% on-time); avoid 2 p.m. departures (54%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 21 min |
| Tuesdaybest | 78% | 17 min |
| Wednesday | 74% | 22 min |
| Thursday | 68% | 24 min |
| Friday | 71% | 24 min |
| Saturday | 75% | 21 min |
| Sunday | 65% | 27 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft43%
- Airline operations25%
- National airspace system25%
- Weather7%
Frequently asked questions
- How often are flights from EWR to IAD delayed?
- 28% of EWR–IAD flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 22 minutes.
- Which airline is most reliable from EWR to IAD?
- Republic Airways has the best on-time record on this route at 76%, based on 144 flights. 2 airlines flew EWR–IAD frequently enough to compare in this period.
- What is the best time of day to fly from EWR to IAD?
- Departures around 5 a.m. have the best record (97% on-time), while departures around 2 p.m. have the worst (54%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from EWR to IAD?
- The scheduled EWR–IAD flight time averages 1h 23m over 212 miles. Actual arrival times vary — flights on this route land 15+ minutes late 28% of the time.
- How often are EWR to IAD flights cancelled?
- 2.5% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from EWR to IAD?
- July 2025 was the roughest month in this dataset, with only 48% of arrivals on time. The best was May 2026 at 87%. If your dates are flexible, that 39-point gap is worth planning around.
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Based on 3,125 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.