Route on-time record
SLC to IAH: most on-time flights and the best time to fly
Salt Lake City (Salt Lake City International Airport) to Houston (George Bush Intercontinental Airport). 1,965 nonstop flights in Jun 2025 to May 2026, 85% arrived within 15 minutes and 0.8% were cancelled. The most reliable flight number was United 2366 at 7:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
SLC → IAH
Salt Lake City to Houston: 1,965 nonstop flights a year
On time (12 months)
85%
Cancelled
0.8%
avg delay 13 min
Best time to leave
Before 9 AM
92% on time vs 80% noon to 3 PM
Most reliable airline
United
86% chance on time
Lowest nonstop fare seen in the next two months: $361 (United 497 on 2026-10-29). 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 2366
7:00 AM → 11:07 AM3h 08m nonstop
Local times, typical schedule. Last flown 2026-05-31.
92%
chance on time
- On time (history)
- 94%
- Cancelled
- 1.6%
- Avg arrival delay
- 7 min
- Arrived on time 94% of the time (254 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; Noon to 3 PM: 80%).
Strong track record · 254 flights
Find United 2366 fares Opens this date on Aviasales#2 · Delta 2502
7:45 AM → 11:50 AM3h 04m nonstop
Local times, typical schedule. Last flown 2026-05-31.
89%
chance on time
- On time (history)
- 89%
- Cancelled
- 0.3%
- Avg arrival delay
- 7 min
- Arrived on time 89% of the time (364 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; Noon to 3 PM: 80%).
Strong track record · 364 flights
Find Delta 2502 fares Opens this date on Aviasales#3 · United 2198
4:43 PM → 8:50 PM3h 07m nonstop
Local times, typical schedule. Last flown 2026-03-28.
85%
chance on time
- On time (history)
- 88%
- Cancelled
- 1.7%
- Avg arrival delay
- 11 min
- Arrived on time 88% of the time (117 flights, Jun 2025 to May 2026).
Moderate track record · 117 flights
Find United 2198 fares Opens this date on Aviasales#4 · SkyWest 5699 · sold as United Express, Delta Connection, American Eagle or Alaska
9:15 AM → 1:38 PM3h 23m nonstop
Local times, typical schedule. Last flown 2026-03-28.
85%
chance on time
- On time (history)
- 86%
- Cancelled
- 2.2%
- Avg arrival delay
- 9 min
- Arrived on time 86% of the time (43 flights, Jun 2025 to May 2026).
- Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
- Short track record (43 flights), so its score leans on the airline's record at this hour.
Limited track record · 43 flights
Find 9:15 AM flight fares Opens this date on Aviasales#5 · Delta 2376
1:20 PM → 5:19 PM2h 59m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Delta 2445; its record covers all of them.
83%
chance on time
- On time (history)
- 86%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 86% of the time (139 flights, Jun 2025 to May 2026).
- Never cancelled in 140 scheduled flights.
- Leaves in this route's least on-time window (Noon to 3 PM: 80% on time; Before 9 AM: 92%).
- Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
Moderate track record · 139 flights
Find Delta 2376 fares Opens this date on Aviasales#6 · United 497
1:03 PM → 5:10 PM3h 07m nonstop
Local times, typical schedule. Last flown 2026-05-31.
80%
chance on time
- On time (history)
- 81%
- Cancelled
- 0.7%
- Avg arrival delay
- 17 min
- Arrived on time 81% of the time (133 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (Noon to 3 PM: 80% on time; Before 9 AM: 92%).
- Lands inside IAH's trouble window: 60% of its 92 ground stops and delay programs started between noon and 6 PM.
Moderate track record · 133 flights
Find United 497 fares Opens this date on Aviasales#7 · Delta 2514
5:35 PM → 9:36 PM3h 01m nonstop
Local times, typical schedule. Last flown 2026-05-31.
77%
chance on time
- On time (history)
- 77%
- Cancelled
- 0.3%
- Avg arrival delay
- 28 min
- Arrived on time 77% of the time (363 flights, Jun 2025 to May 2026).
Strong track record · 363 flights
Find Delta 2514 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines86%
885 flights · 87% on time as flown · 1.4% cancel
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)85%
69 flights · 88% on time as flown · 1.0% cancel
- Delta Air Lines82%
1,011 flights · 82% on time as flown · 0.3% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM92%
714 flights · avg delay 6 min
- 9 AM to noon89%
111 flights · avg delay 6 min
- Noon to 3 PM80%
614 flights · avg delay 13 min
- 3 to 6 PM80%
495 flights · avg delay 22 min
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
- Airline (crew, maintenance, boarding)52%
- Air traffic control and airport volume26%
- Late-arriving aircraft18%
- 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
SLC to IAH questions
- What time of day is best to fly SLC to IAH?
- Before 9 AM: 92% of flights arrived on time, against 80% for departures noon to 3 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 SLC to IAH?
- United, with a season-adjusted 86% chance of operating and arriving on time over 885 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 SLC to IAH?
- July (76% 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 SLC
- IAH to SLC (return)
- SLC to DEN 77%
- SLC to PHX 84%
- SLC to SEA 79%
- SLC to LAX 86%
- SLC to DFW 78%
- SLC to LAS 78%
- SLC to SFO 72%
- SLC to ORD 75%
- SLC to ATL 86%
- SLC to SAN 84%
- SLC to PDX 88%
- SLC to SMF 86%
Live status: FAA delays and ground stops