Houston (IAH) to Newark (EWR): On-Time Performance
Data through July 2026
When you fly IAH to EWR matters as much as anything else about the booking: the route swung from 88% on-time in January 2025 to just 48% in July 2024. Across the full period the route averages 73% on-time against a national 78%. Morning departures also hold up better than evening ones (83% vs 68%), which matters most in the rough months.
- On-time
- 73%
- arrived <15 min late
- Avg delay
- 22 min
- completed flights
- Cancelled
- 1.9%
- Flights/day
- 10
- last 12 months
- Duration
- 3h 34m
- scheduled
- Distance
- 1,400 mi
Best airline from IAH to EWR
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Spirit Airlinesmost reliable | 78% | 16 min | 4.6% | 611 |
| United Airlines | 73% | 22 min | 1.7% | 7,249 |
Monthly on-time trend
Best time to fly from IAH to EWR
Aim for departures around 5 a.m. (92% on-time); avoid 3 p.m. departures (48%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 19 min |
| Tuesdaybest | 79% | 18 min |
| Wednesday | 76% | 17 min |
| Thursday | 70% | 23 min |
| Friday | 71% | 22 min |
| Saturday | 72% | 25 min |
| Sunday | 70% | 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 aircraft22%
- Airline operations22%
- National airspace system48%
- Weather8%
Frequently asked questions
- How often are flights from IAH to EWR delayed?
- 27% of IAH–EWR 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 IAH to EWR?
- Spirit Airlines has the best on-time record on this route at 78%, based on 611 flights. 2 airlines flew IAH–EWR frequently enough to compare in this period.
- What is the best time of day to fly from IAH to EWR?
- Departures around 5 a.m. have the best record (92% on-time), while departures around 3 p.m. have the worst (48%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from IAH to EWR?
- The scheduled IAH–EWR flight time averages 3h 34m over 1,400 miles. Actual arrival times vary — flights on this route land 15+ minutes late 27% of the time.
- How often are IAH to EWR flights cancelled?
- 1.9% 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 IAH to EWR?
- July 2024 was the roughest month in this dataset, with only 48% of arrivals on time. The best was January 2025 at 88%. If your dates are flexible, that 40-point gap is worth planning around.
Explore related pages
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Based on 7,860 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.