Route on-time record

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

Dallas (Dallas Love Field) to Denver (Denver International Airport). 3,017 nonstop flights in Jun 2025 to May 2026, 69% arrived within 15 minutes and 1.3% were cancelled. The most reliable flight number was Southwest 1511 at 6:45 AM.

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

DAL → DEN

Dallas to Denver: 3,017 nonstop flights a year

On time (12 months)

69%

Cancelled

1.3%

avg delay 19 min

Best time to leave

Before 9 AM

85% on time vs 55% 3 to 6 PM

Most reliable airline

Southwest

68% chance on time

Check DAL to DEN fares

Lowest nonstop fare seen in the next two months: $81 (Southwest 1363 on 2026-11-07). 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 1511
6:45 AM → 7:45 AM2h 00m nonstop
Local times, typical schedule. Last flown 2026-05-31.
92%
chance on time
On time (history)
98%
Cancelled
1.8%
Avg arrival delay
1 min
- Arrived on time 98% of the time (54 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 85% on time; 3 to 6 PM: 55%).
- Departs outside DAL's trouble window (10 AM to 4 PM, when 67% of its 42 ground stops and delay programs started).
- Short track record (54 flights), so its score leans on the airline's record at this hour.
Limited track record · 54 flights
Find Southwest 1511 fares Opens this date on Aviasales
#2 · Southwest 2121
6:00 AM → 7:05 AM2h 05m nonstop
Local times, typical schedule. Last flown 2026-04-06.
87%
chance on time
On time (history)
91%
Cancelled
0.0%
Avg arrival delay
4 min
- Arrived on time 91% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 85% on time; 3 to 6 PM: 55%).
- Departs outside DAL's trouble window (10 AM to 4 PM, when 67% of its 42 ground stops and delay programs started).
Limited track record · 33 flights
Find Southwest 2121 fares Opens this date on Aviasales
#3 · Southwest 1107
7:15 AM → 8:20 AM2h 05m nonstop
Local times, typical schedule. Last flown 2026-04-06.
82%
chance on time
On time (history)
87%
Cancelled
0.0%
Avg arrival delay
7 min
- Arrived on time 87% of the time (15 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 85% on time; 3 to 6 PM: 55%).
- Departs outside DAL's trouble window (10 AM to 4 PM, when 67% of its 42 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 1107 fares Opens this date on Aviasales
#4 · Southwest 2369
9:05 AM → 10:15 AM2h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31.
81%
chance on time
On time (history)
84%
Cancelled
0.0%
Avg arrival delay
9 min
- Arrived on time 84% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Departs outside DAL's trouble window (10 AM to 4 PM, when 67% of its 42 ground stops and delay programs started).
- Short track record (55 flights), so its score leans on the airline's record at this hour.
Limited track record · 55 flights
Find Southwest 2369 fares Opens this date on Aviasales
#5 · Southwest 4499
12:50 PM → 1:55 PM2h 05m nonstop
Local times, typical schedule. Last flown 2026-04-05.
76%
chance on time
On time (history)
83%
Cancelled
0.0%
Avg arrival delay
16 min
- Arrived on time 83% of the time (18 flights, Jun 2025 to May 2026).
- Departs inside DAL's trouble window: 67% of its 42 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (18 flights), so its score leans on the airline's record at this hour.
Limited track record · 18 flights
Find Southwest 4499 fares Opens this date on Aviasales
#6 · Southwest 3318
10:15 AM → 11:20 AM2h 05m nonstop
Local times, typical schedule. Last flown 2026-04-06.
75%
chance on time
On time (history)
82%
Cancelled
0.0%
Avg arrival delay
11 min
- Arrived on time 82% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Departs inside DAL's trouble window: 67% of its 42 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (33 flights), so its score leans on the airline's record at this hour.
Limited track record · 33 flights
Find Southwest 3318 fares Opens this date on Aviasales
#7 · Southwest 2941
12:40 PM → 1:45 PM2h 05m nonstop
Local times, typical schedule. Last flown 2026-04-06.
73%
chance on time
On time (history)
73%
Cancelled
0.0%
Avg arrival delay
36 min
- Arrived on time 73% of the time (15 flights, Jun 2025 to May 2026).
- Departs inside DAL's trouble window: 67% of its 42 ground stops and delay programs started between 10 AM and 4 PM.
- 59% 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 2941 fares Opens this date on Aviasales
#8 · Southwest 1515
10:55 AM → 12:00 PM2h 05m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 573; its record covers all of them.
72%
chance on time
On time (history)
70%
Cancelled
0.0%
Avg arrival delay
12 min
- Arrived on time 70% of the time (47 flights, Jun 2025 to May 2026).
- Never cancelled in 47 scheduled flights.
- Departs inside DAL's trouble window: 67% of its 42 ground stops and delay programs started between 10 AM and 4 PM.
- Short track record (47 flights), so its score leans on the airline's record at this hour.
Limited track record · 47 flights
Find Southwest 1515 fares Opens this date on Aviasales
#9 · Southwest 2345
8:40 AM → 9:45 AM2h 05m nonstop
Local times, typical schedule. Last flown 2026-04-04.
72%
chance on time
On time (history)
77%
Cancelled
0.0%
Avg arrival delay
10 min
- Arrived on time 77% of the time (13 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 85% on time; 3 to 6 PM: 55%).
- Departs outside DAL's trouble window (10 AM to 4 PM, when 67% of its 42 ground stops and delay programs started).
- Short track record (13 flights), so its score leans on the airline's record at this hour.
Limited track record · 13 flights
Find Southwest 2345 fares Opens this date on Aviasales
#10 · Southwest 3968
1:30 PM → 2:35 PM2h 05m nonstop
Local times, typical schedule. Last flown 2026-05-29.
68%
chance on time
On time (history)
73%
Cancelled
0.0%
Avg arrival delay
9 min
- Arrived on time 73% of the time (22 flights, Jun 2025 to May 2026).
- Departs inside DAL's trouble window: 67% of its 42 ground stops and delay programs started between 10 AM and 4 PM.
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (22 flights), so its score leans on the airline's record at this hour.
Limited track record · 22 flights
Find Southwest 3968 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

Southwest Airlines68%
3,017 flights · 69% on time as flown · 1.3% cancel

On time by departure time

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

Before 9 AM85%
655 flights · avg delay 7 min
9 AM to noon78%
475 flights · avg delay 12 min
Noon to 3 PM71%
672 flights · avg delay 18 min
3 to 6 PM55%
531 flights · avg delay 33 min
6 to 9 PM56%
471 flights · avg delay 29 min
After 9 PM57%
213 flights · avg delay 25 min

Best day: Tuesday (78%). Worst: Thursday (70%).

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 aircraft43%
Airline (crew, maintenance, boarding)26%
Air traffic control and airport volume25%
Severe weather6%

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

DAL to DEN questions

What time of day is best to fly DAL to DEN?: Before 9 AM: 85% of flights arrived on time, against 55% 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 DAL to DEN?: Southwest, with a season-adjusted 68% chance of operating and arriving on time over 3,017 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 DAL to DEN?: May (60% on time); the best was January (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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