EWR to IAH flight delays
Newark, NJ (EWR) Houston, TX (IAH) · 1,400 miles
3,798 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
79.57%
Arrived on time
Within 15 minutes of schedule
2.08%
Cancelled
Share of scheduled flights
75 min
When late, late by
Average across delayed arrivals
16 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Which airline you fly changes the odds here. United Airlines arrived on time 12.6 points more often than Spirit Airlines over the same period on the same route — same airports, same weather, same air traffic control. A gap that survives all of that is about how the two airlines are run.
The shape of the lateness matters here. Flights on this route are not late often, but when they are late they are late by about 75 minutes — long enough to lose a connection or an evening. The on-time percentage looks reassuring and understates the consequence of being on the wrong flight.
The season swings this route hard. In September it ran 19.7 points more punctual than in July — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The two directions do not behave alike. IAH to EWR arrives on time 5 points less often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
Which airline should you fly on this route?
Over January 2025 – August 2026, United Airlines arrived on time most often on EWR to IAH. Spirit Airlines was late most often. Flights ran closest to schedule in September and worst in July.
Every airline on EWR to IAH
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| United Airlines | 3,534 | 80.4% | 1.64% | 74 min | C |
| Spirit Airlines | 264 | 67.77% | 7.95% | 88 min | F |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
IAH to EWR Houston back to Newark 74.57% on time DOther routes from Newark
- EWR → MCO · Orlando D
- EWR → ATL · Atlanta D
- EWR → ORD · Chicago F
- EWR → LAX · Los Angeles D
- EWR → FLL · Fort Lauderdale D
- EWR → SFO · San Francisco D
- EWR → MIA · Miami D
- EWR → BOS · Boston F
- EWR → DTW · Detroit D
- EWR → CLT · Charlotte D
- EWR → PBI · West Palm Beach/Palm Beach D
- EWR → DFW · Dallas/Fort Worth D
Common questions
Are flights from Newark to Houston usually delayed?
79.57% of flights on the EWR to IAH route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is about the same as the average route in this record.
Which airline is most on time from Newark to Houston?
United Airlines, at 80.4% on time across 3,534 flights. The least punctual on the route was Spirit Airlines at 67.77%.
How often are EWR to IAH flights cancelled?
2.08% of scheduled flights did not operate — about 21 in every thousand. That is in the normal range.
What is the best month to fly Newark to Houston?
September, when 87.5% of flights arrived on time. The worst was July at 67.8%.
When EWR to IAH flights are late, how late are they?
About 75 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on EWR to IAH during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →