Route on-time record
TPA to IAH: most on-time flights and the best time to fly
Tampa (Tampa International Airport) to Houston (George Bush Intercontinental Airport). 1,717 nonstop flights in Jun 2025 to May 2026, 84% arrived within 15 minutes and 0.7% were cancelled. The most reliable flight number was United 2491 at 7:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
TPA → IAH
Tampa to Houston: 1,717 nonstop flights a year
On time (12 months)
84%
Cancelled
0.7%
avg delay 15 min
Best time to leave
Before 9 AM
92% on time vs 73% 3 to 6 PM
Most reliable airline
United
86% chance on time
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 2491
7:00 AM → 8:36 AM2h 36m nonstop
Local times, typical schedule. Last flown 2026-05-31.
93%
chance on time
- On time (history)
- 94%
- Cancelled
- 0.7%
- Avg arrival delay
- 7 min
- Arrived on time 94% of the time (144 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; 3 to 6 PM: 73%).
- Departs outside TPA's trouble window (noon to 6 PM, when 76% of its 25 ground stops and delay programs started).
Moderate track record · 144 flights
Find United 2491 fares Opens this date on Aviasales#2 · United 2319
9:05 AM → 10:41 AM2h 36m nonstop
Local times, typical schedule. Last flown 2026-05-31.
91%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 93% of the time (107 flights, Jun 2025 to May 2026).
- Never cancelled in 107 scheduled flights.
- Departs outside TPA's trouble window (noon to 6 PM, when 76% of its 25 ground stops and delay programs started).
Moderate track record · 107 flights
Find United 2319 fares Opens this date on Aviasales#3 · United 1971
11:30 AM → 1:06 PM2h 36m nonstop
Local times, typical schedule. Last flown 2026-05-20.
91%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.0%
- Avg arrival delay
- 10 min
- Arrived on time 90% of the time (20 flights, Jun 2025 to May 2026).
- Departs outside TPA's trouble window (noon to 6 PM, when 76% of its 25 ground stops and delay programs started).
- Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
Limited track record · 20 flights
Find United 1971 fares Opens this date on Aviasales#4 · United 699
11:55 AM → 1:22 PM2h 27m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 17 min
- Arrived on time 82% of the time (11 flights, Jun 2025 to May 2026).
- Departs outside TPA's trouble window (noon to 6 PM, when 76% of its 25 ground stops and delay programs started).
- Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
Limited track record · 11 flights
Find United 699 fares Opens this date on Aviasales#5 · United 1834
5:05 PM → 6:47 PM2h 36m nonstop
Local times, typical schedule. Last flown 2026-05-31.
70%
chance on time
- On time (history)
- 63%
- Cancelled
- 0.0%
- Avg arrival delay
- 38 min
- Arrived on time 63% of the time (132 flights, Jun 2025 to May 2026).
- Never cancelled in 132 scheduled flights.
- Leaves in this route's least on-time window (3 to 6 PM: 73% on time; Before 9 AM: 92%).
- Departs inside TPA's trouble window: 76% of its 25 ground stops and delay programs started between noon and 6 PM.
Moderate track record · 132 flights
Find United 1834 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines86%
1,375 flights · 87% on time as flown · 0.4% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM92%
431 flights · avg delay 7 min
- 9 AM to noon88%
713 flights · avg delay 9 min
- Noon to 3 PM82%
110 flights · avg delay 14 min
- 3 to 6 PM73%
410 flights · avg delay 26 min
Best day: Wednesday (85%). Worst: Sunday (79%).
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
- Air traffic control and airport volume37%
- Late-arriving aircraft29%
- Airline (crew, maintenance, boarding)28%
- Severe weather5%
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
TPA to IAH questions
- What time of day is best to fly TPA to IAH?
- Before 9 AM: 92% of flights arrived on time, against 73% 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 TPA to IAH?
- United, with a season-adjusted 86% chance of operating and arriving on time over 1,375 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 TPA to IAH?
- June (72% on time); the best was September (92%), 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 TPA
- IAH to TPA (return)
- TPA to ATL 79%
- TPA to CLT 82%
- TPA to ORD 72%
- TPA to DEN 81%
- TPA to MIA 77%
- TPA to DFW 75%
- TPA to LGA 71%
- TPA to BOS 74%
- TPA to BWI 79%
- TPA to EWR 75%
- TPA to PHL 75%
- TPA to BNA 74%
Most on-time flights from TPA on every route →
Live status: FAA delays and ground stops