My trip
Plan a trip
Tell FlyerIntel where and when you are flying. It will show how that route actually performs at that time of day and on that day of the week, what both airports are doing right now, and when to get to the airport.
ORD → IAH
Chicago to Houston · departing 9:15 PM
ORD → IAH flights departing 9 PM–5 AM arrive on time 67.4% of the time, against 77.0% across the whole day — your departure window is 9.6 points worse than average for this route.
Your slot
Add a date above to see how that hour has done on your day of the week, and what a nearby slot would change.
Other times on ORD → IAH
Time of day
On ORD → IAH, flights leaving 5–9 AM arrived on time 87.3% of the time, against 67.4% for those leaving 9 PM–5 AM: 19.9 points more often.
- 5–9 AM87.3%
- 9 AM–12 PM81.5%
- 12–3 PM76.8%
- 3–6 PM71.3%
- 6–9 PM66.0%
- 9 PM–5 AM67.4%
Day of week
- Monday76.8%
- Tuesday80.2%
- Wednesday79.3%
- Thursday76.1%
- Friday73.8%
- Saturday77.6%
- Sunday75.5%
Bars start below the lowest figure so a real gap is visible; read the percentage, not the bar length. A time with too few flights to score is left unscored rather than guessed at.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · History describes what has happened on this route. It is not a prediction about your flight. Full route profile →
Which flight
Flights on ORD → IAH, the ones scheduled closest to 9:15 PM first.
Within 90 minutes of 9:15 PM, UA2665 (usually 9:15 PM) has the best record: 71.8% on time and 1.46% cancelled over 889 flights, against 77.0% on time for ORD → IAH as a whole.
| Flight | Usually departs | On time | Cancelled |
|---|---|---|---|
| UA2665United AirlinesLive map | 9:15 PM | 71.8% | 1.46% |
| AA3144American AirlinesLive map | 8:22 PM53 min away | 51.8% | 4.74% |
| UA1475United AirlinesLive map | 6:40 PM155 min away | 60.8% | 0.67% |
| UA714United AirlinesLive map | 4:05 PM310 min away | 74.1% | 0.00% |
| UA1448United AirlinesLive map | 12:40 PM515 min away | 87.9% | 0.80% |
| F93135Frontier AirlinesLive map | 6:30 AM555 min away | 74.4% | 3.35% |
| UA1231United AirlinesLive map | 7:35 AM620 min away | 90.7% | 1.26% |
| UA2638United AirlinesLive map | 10:35 AM640 min away | 86.8% | 0.00% |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · “Usually departs” is the scheduled time each flight number most often had over the period; airlines retime flights, so confirm the time on your booking. Flight numbers with fewer than 90 operations on this route are left out. This is history, not a forecast for your flight.
When to get to the airport
A starting point for ORD, not a promise about your day.
1h 45m before your 9:15 PM departure
How this was worked out
- FlyerIntel cannot currently obtain live security wait times for ORD, so this figure does not account for the queue on the day.
- It does not include your journey to the airport, parking, or a shuttle from a remote lot.
- International departures, and travel with children, checked pets or special assistance, need more time.
Both airports right now
Aviation weather is not currently a factor.
Minimal operational impact. Conditions are not a notable factor for operations right now.
UpdatedAviation weather is not currently a factor.
Minimal operational impact. Conditions are not a notable factor for operations right now.
UpdatedSource: NOAA Aviation Weather Center · Conditions describe the airfield, not your flight, and change quickly.
Other ways to make this journey
Airport pairings serving Chicago to Houston.
Who flies this route
Performance by the carrier that actually operates the flight.
| Carrier | Flights | On time | Cancelled | Median delay |
|---|---|---|---|---|
| United Airlines | 11,764 | 79.8% | 0.91% | -7 min |
| American Airlines | 2,171 | 67.3% | 1.98% | -3 min |
| Spirit Airlines | 1,318 | 70.7% | 2.58% | -4 min |
| Envoy Air | 686 | 75.9% | 1.31% | -9 min |
| Republic Airways | 581 | 74.9% | 2.58% | -8 min |
| Frontier Airlines | 490 | 73.8% | 3.27% | -4 min |