Carrier route record
UAEWR→IAH
United Airlines · Newark to Houston
- Flights
- 3,534
- Period
- July 2025 to June 2026
- Share of route
- 93%
- Carriers
- 2
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with United Airlines.
United on EWR to IAH lands a B, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 3,534 flights, with a median arrival 11 minutes early.
The US average over the same twelve months is 77.6%, so there is little to separate United on EWR to IAH from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
80.4%
Arrivals under 15 minutes late, of 3,469 completed flights
Avg delay
74 min
Across delayed arrivals only, not all flights
Cancelled
1.64%
National rate is 1.81%
Whole route
79.6%
Every carrier on EWR to IAH, 3,798 flights
These figures cover 3,534 flights between July 2025 and June 2026. Beyond the headline rate, 8.0% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
United against every carrier on EWR to IAH
United flew 3,534 of the 3,798 flights on EWR to IAH, most of the route. Its 80.4% on time is about level with the route as a whole at 79.6%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from United at 80.4% to Spirit at 67.8%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlines (this page) | 3,534 | 80.4% | 74 min | 1.64% | B |
| Spirit Airlinesthin sample | 264 | 67.8% | 88 min | 7.95% | C− |
Flight by flight
United flight numbers on EWR to IAH
Departure window
When United runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 20 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am701 flights92.2%
- 8am–11am613 flights82.8%
- 11am–2pm401 flights84.9%
- 2pm–5pm730 flights74.3%
- 5pm–8pm725 flights74.4%
- 8pm–5am364 flights72.7%
Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 92.2% of the time, against 72.7% for the overnight window. That is 20 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 2pm–5pm window is the busiest, with 730 flights scheduled in it.
Across the year
United on EWR to IAH through the year
July is the worst month at 68.6% on time, 19 points below April, the best at 87.7%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. December was the busiest month here, with 311 flights.
Across the week, Monday is the strongest day at 84.4% on time and Sunday the weakest at 77.9%. 7 points is a smaller lever than departure hour, but it is free.
Delay causes
Why United runs late on this route
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 50,000 reported delay minutes.
- 40%Late-arriving aircraft
- 28%Carrier
- 28%National Airspace System
- 4%Extreme weather
40% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 50,000 reported delay minutes here, that single category outweighs weather by 9 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 50,160 reported delay minutes.
The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 92.2% on time here.
Cancellations sit at 1.64% against a national 1.81%, which is ordinary. Diversions add another 0.20%.
Connections and stage length
What a delay here costs
8.0% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.
The 1,400 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg is a different operation and performs like one: it runs 74.5% on time across 3,534 flights, 6 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 6 points of difference.
The sample behind these figures is 3,534 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
What to do with this
Booking United on EWR to IAH
Put together: the calendar is the biggest lever here, not the carrier or the hour. April runs 87.7% on time and July 68.6%, a swing of 19 points. If the dates move at all, move them out of July before you think about anything else. 3,469 completed flights over 12 months sit behind that.
Related
Where to go next
- EWR to IAH, every carrier
- United on IAH to EWR, the return leg
- Spirit Airlines on EWR to IAH67.8%
- United Airlines network-wide record
- Newark Liberty International (EWR) delay statistics
- George Bush Intercontinental (IAH) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.