Route on-time record

DEN to HOU: most on-time flights and the best time to fly

Denver (Denver International Airport) to Houston (William P. Hobby Airport). 2,344 nonstop flights in Jun 2025 to May 2026, 73% arrived within 15 minutes and 0.4% were cancelled. The most reliable flight number was Southwest 2166 at 6:00 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

DEN → HOU

Denver to Houston: 2,344 nonstop flights a year

On time (12 months)

73%

Cancelled

0.4%

avg delay 16 min

Best time to leave

Before 9 AM

94% on time vs 52% 6 to 9 PM

Most reliable airline

Southwest

73% chance on time

Check DEN to HOU fares

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 · Southwest 2166
6:00 AM → 9:30 AM2h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 2366; its record covers all of them.
93%
chance on time
On time (history)
96%
Cancelled
1.4%
Avg arrival delay
1 min
- Arrived on time 96% of the time (71 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 94% on time; 6 to 9 PM: 52%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Moderate track record · 71 flights
Find Southwest 2166 fares Opens this date on Aviasales
#2 · Southwest 1746
7:20 AM → 10:50 AM2h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
90%
chance on time
On time (history)
93%
Cancelled
0.0%
Avg arrival delay
6 min
- Arrived on time 93% of the time (45 flights, Jun 2025 to May 2026).
- Never cancelled in 46 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 94% on time; 6 to 9 PM: 52%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Limited track record · 45 flights
Find Southwest 1746 fares Opens this date on Aviasales
#3 · Southwest 3157
6:45 AM → 10:10 AM2h 25m nonstop
Local times, typical schedule. Last flown 2026-04-01.
89%
chance on time
On time (history)
88%
Cancelled
0.0%
Avg arrival delay
2 min
- Arrived on time 88% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 94% on time; 6 to 9 PM: 52%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 3157 fares Opens this date on Aviasales
#4 · Southwest 126
7:45 AM → 11:15 AM2h 30m nonstop
Local times, typical schedule. Last flown 2026-04-06.
87%
chance on time
On time (history)
93%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 93% of the time (15 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 94% on time; 6 to 9 PM: 52%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Short track record (15 flights), so its score leans on the airline's record at this hour.
Limited track record · 15 flights
Find Southwest 126 fares Opens this date on Aviasales
#5 · Southwest 1375
12:15 PM → 3:45 PM2h 30m nonstop
Local times, typical schedule. Last flown 2026-05-30.
75%
chance on time
On time (history)
77%
Cancelled
0.0%
Avg arrival delay
10 min
- Arrived on time 77% of the time (31 flights, Jun 2025 to May 2026).
- Never cancelled in 31 scheduled flights.
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Lands inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
Limited track record · 31 flights
Find Southwest 1375 fares Opens this date on Aviasales
#6 · Southwest 492
10:55 AM → 2:25 PM2h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 3371; its record covers all of them.
74%
chance on time
On time (history)
72%
Cancelled
0.0%
Avg arrival delay
13 min
- Arrived on time 72% of the time (88 flights, Jun 2025 to May 2026).
- Never cancelled in 88 scheduled flights.
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Lands inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
Moderate track record · 88 flights
Find Southwest 492 fares Opens this date on Aviasales
#7 · Southwest 834
3:00 PM → 6:35 PM2h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
68%
chance on time
On time (history)
66%
Cancelled
0.0%
Avg arrival delay
18 min
- Arrived on time 66% of the time (47 flights, Jun 2025 to May 2026).
- Never cancelled in 47 scheduled flights.
- Departs inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
- 55% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 47 flights
Find Southwest 834 fares Opens this date on Aviasales
#8 · Southwest 4658
1:25 PM → 4:50 PM2h 25m nonstop
Local times, typical schedule. Last flown 2026-04-06.
68%
chance on time
On time (history)
58%
Cancelled
3.7%
Avg arrival delay
23 min
- Arrived on time 58% of the time (26 flights, Jun 2025 to May 2026).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Lands inside HOU's trouble window: 80% of its 40 ground stops and delay programs started between noon and 6 PM.
- Short track record (26 flights), so its score leans on the airline's record at this hour.
Limited track record · 26 flights
Find Southwest 4658 fares Opens this date on Aviasales
#9 · Southwest 174
4:00 PM → 7:30 PM2h 30m nonstop
Local times, typical schedule. Last flown 2026-04-06.
65%
chance on time
On time (history)
60%
Cancelled
0.0%
Avg arrival delay
27 min
- Arrived on time 60% of the time (15 flights, Jun 2025 to May 2026).
- Departs inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
- 63% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (15 flights), so its score leans on the airline's record at this hour.
Limited track record · 15 flights
Find Southwest 174 fares Opens this date on Aviasales
#10 · Southwest 2730
8:55 PM → 12:25 AM2h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
56%
chance on time
On time (history)
51%
Cancelled
0.0%
Avg arrival delay
28 min
- Arrived on time 51% of the time (47 flights, Jun 2025 to May 2026).
- Never cancelled in 47 scheduled flights.
- Leaves in this route's least on-time window (6 to 9 PM: 52% on time; Before 9 AM: 94%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
Limited track record · 47 flights
Find Southwest 2730 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

Southwest Airlines73%
2,344 flights · 73% on time as flown · 0.4% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

Before 9 AM94%
658 flights · avg delay 3 min
9 AM to noon80%
399 flights · avg delay 10 min
Noon to 3 PM71%
367 flights · avg delay 16 min
3 to 6 PM61%
362 flights · avg delay 24 min
6 to 9 PM52%
532 flights · avg delay 32 min

Best day: Wednesday (79%). Worst: Friday (70%).

Smarter routing

Nearby airports that run more on time

DEN → IAH 78% chance on time
Denver International Airport to George Bush Intercontinental Airport · 4,632 flights a year · 24 mi from your airports · yours: 73%
Rank flights Fares

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 aircraft52%
Airline (crew, maintenance, boarding)33%
Air traffic control and airport volume14%

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

DEN to HOU questions

What time of day is best to fly DEN to HOU?: Before 9 AM: 94% of flights arrived on time, against 52% for departures 6 to 9 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 DEN to HOU?: Southwest, with a season-adjusted 73% chance of operating and arriving on time over 2,344 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 DEN to HOU?: July (62% on time); the best was September (82%), 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.

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Live status: FAA delays and ground stops

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