Route on-time record
IAH to RDU: most on-time flights and the best time to fly
Houston (George Bush Intercontinental Airport) to Raleigh/Durham (Raleigh-Durham International Airport). 910 nonstop flights in Jun 2025 to May 2026, 82% arrived within 15 minutes and 1.2% were cancelled. The most reliable flight number was United 2196 at 12:12 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
IAH → RDU
Houston to Raleigh/Durham: 910 nonstop flights a year
On time (12 months)
82%
Cancelled
1.2%
avg delay 14 min
Best time to leave
Before 9 AM
90% on time vs 75% 3 to 6 PM
Most reliable airline
United
83% chance on time
Lowest nonstop fare seen in the next two months: $144 (Frontier 1742 on 2026-11-24). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · United 2196
12:12 PM → 3:55 PM2h 43m nonstop
Local times, typical schedule. Last flown 2026-05-20.
89%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 90% of the time (21 flights, Jun 2025 to May 2026).
- Departs inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
- Lands inside RDU's trouble window: 57% of its 14 ground stops and delay programs started between 11 AM and 5 PM.
- 81% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 21 flights
Find United 2196 fares Opens this date on Aviasales#2 · United 2498
6:40 PM → 10:27 PM2h 43m nonstop
Local times, typical schedule. Last flown 2026-05-31.
78%
chance on time
- On time (history)
- 80%
- Cancelled
- 0.8%
- Avg arrival delay
- 14 min
- Arrived on time 80% of the time (241 flights, Jun 2025 to May 2026).
- Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).
- 52% of its delay minutes came from the plane arriving late from an earlier flight.
Strong track record · 241 flights
Find United 2498 fares Opens this date on Aviasales#3 · Frontier 1742
9:45 AM → 1:37 PM2h 43m nonstop
Local times, typical schedule. Last flown 2026-05-31.
76%
chance on time
- On time (history)
- 80%
- Cancelled
- 2.4%
- Avg arrival delay
- 19 min
- Arrived on time 80% of the time (79 flights, Jun 2025 to May 2026).
- Departs outside IAH's trouble window (noon to 6 PM, when 60% of its 92 ground stops and delay programs started).
- Lands inside RDU's trouble window: 57% of its 14 ground stops and delay programs started between 11 AM and 5 PM.
Moderate track record · 79 flights
Find Frontier 1742 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines83%
719 flights · 84% on time as flown · 0.9% cancel
- Frontier Airlines74%
184 flights · 75% on time as flown · 2.0% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM90%
31 flights · avg delay 5 min
- 9 AM to noon88%
66 flights · avg delay 12 min
- Noon to 3 PM86%
371 flights · avg delay 12 min
- 3 to 6 PM75%
86 flights · avg delay 19 min
- 6 to 9 PM77%
356 flights · avg delay 17 min
Best day: Wednesday (82%). Worst: Monday (76%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft47%
- Airline (crew, maintenance, boarding)34%
- Air traffic control and airport volume12%
- Severe weather7%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
IAH to RDU questions
- What time of day is best to fly IAH to RDU?
- Before 9 AM: 90% of flights arrived on time, against 75% for departures 3 to 6 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from IAH to RDU?
- United, with a season-adjusted 83% chance of operating and arriving on time over 719 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on IAH to RDU?
- July (62% on time); the best was February (89%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from IAH
- RDU to IAH (return)
- IAH to ORD 75%
- IAH to DFW 75%
- IAH to LAX 83%
- IAH to ATL 77%
- IAH to DEN 81%
- IAH to LGA 72%
- IAH to EWR 74%
- IAH to MIA 78%
- IAH to MCO 81%
- IAH to SFO 79%
- IAH to LAS 82%
- IAH to DCA 75%
Most on-time flights from IAH on every route →
Live status: FAA delays and ground stops