Houston, TX · Airport profile
IAH
George Bush Intercontinental Airport
IAH right now
Current operating conditions, from live sources only.
Aviation weather is not currently a factor. FAA operational data — ground stops, ground delay programs and closures — is not currently available to FlyerIntel.
FAA operational data is not currently available to FlyerIntel. Why
Minimal operational impact. Conditions are not a notable factor for operations right now.
Forecast issued 23:20Z.
UpdatedSecurity wait data is not currently available for IAH. Why
Parking data is not currently available for IAH. Why
FlyerIntel shows live values only where a permitted source provides them. Sections without data are left empty rather than estimated.
Airport reliability
Departures from IAH, July 2023 – June 2026.
Better than 24% of major US airports covered by FlyerIntel (58 compared)
Calculated from 349,206 flights. How this is calculated
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – June 2026
Best time to fly from IAH
On-time arrival rate by scheduled local departure time.
Flights departing 5–9 AM arrived on time 88.0% of the time, against 71.0% for 6–9 PM departures — a gap of 16.9 percentage points.
By departure window
By departure hour
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026 · Buckets with fewer than 120 flights are not scored.
What to expect at IAH
How busy the airport is through the day, from scheduled departure volume.
Scheduled departures by hour
The busiest hour is 6 PM, with about 41 departures a day, against roughly 6 at 3 PM.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026 · Taxi-out is the time between leaving the gate and lifting off, averaged across departures and weighted by hour.
Weekly and seasonal patterns
By day of week
Tuesday is historically the most reliable day and Sunday the least, a gap of 6.5 percentage points.
By month
July is historically the weakest month and February the strongest, a spread of 17.7 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026
Airlines at IAH
Departure performance by operating carrier. Regional flights are reported by the carrier that operated them, not by the mainline brand.
| Carrier | Departures | On time | Cancelled | Median delay |
|---|---|---|---|---|
| United Airlines UA | 212,194 | 78.1% | 1.17% | -5 min |
| SkyWest Airlines OO | 40,081 | 77.2% | 1.78% | -5 min |
| Delta Air Lines DL | 24,255 | 81.9% | 1.35% | -9 min |
| Spirit Airlines NK | 22,948 | 75.8% | 2.05% | -6 min |
| American Airlines AA | 21,767 | 76.3% | 2.49% | -6 min |
| Frontier Airlines F9 | 10,944 | 65.7% | 2.31% | 0 min |
| Southwest Airlines WN | 5,853 | 82.9% | 1.13% | -6 min |
| Envoy Air MQ | 4,239 | 77.9% | 2.57% | -8 min |
| Alaska Airlines AS | 3,027 | 78.5% | 1.42% | -5 min |
| JetBlue B6 | 2,114 | 61.7% | 2.03% | 4 min |
| Republic Airways YX | 1,294 | 74.9% | 4.17% | -8 min |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026 · Carriers with fewer than 500 departures are not listed.
Routes from IAH
Ranked by FlyerIntel Route Reliability Score.
Most reliable
Busiest routes
| Destination | Flights | On time | Score |
|---|---|---|---|
| IAH → DFW Dallas–Fort Worth | 16,462 | 73.3% | 41 |
| IAH → ORD Chicago | 16,460 | 77.1% | 59 |
| IAH → LAX Los Angeles | 16,077 | 82.8% | 74 |
| IAH → DEN Denver | 14,513 | 79.3% | 67 |
| IAH → ATL Atlanta | 13,924 | 77.0% | 59 |
| IAH → LGA New York | 12,046 | 75.7% | 52 |
| IAH → LAS Las Vegas | 11,636 | 79.9% | 68 |
| IAH → EWR Newark | 11,224 | 75.6% | 53 |
| IAH → MCO Orlando | 11,088 | 77.9% | 59 |
| IAH → MIA Miami | 10,563 | 75.6% | 53 |
| IAH → SFO San Francisco | 10,034 | 77.3% | 65 |
| IAH → MSY New Orleans | 8,825 | 80.3% | 66 |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026 · Only routes with at least 750 flights are ranked.
Reliability over time
On-time arrival rate for departures, by month.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – June 2026
Data and sources
Historical statistics
Every historical figure on this page is calculated by FlyerIntel from US DOT Bureau of Transportation Statistics on-time performance records covering July 2023 – June 2026, comprising 349,206 departures from IAH. A flight counts as delayed when it arrives 15 or more minutes after schedule.
Live conditions
Aviation weather comes from the NOAA Aviation Weather Center. Operational events come from the FAA where available. FlyerIntel shows the age of every live value and does not display data it cannot currently retrieve.
Latest observation for IAH: METAR KIAH 292353Z 12010KT 10SM FEW065 FEW250 34/22 A2995 RMK AO2 SLP140 T03390217 10361 20328 55008 $ (issued ).