Route on-time record

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

Denver (Denver International Airport) to New York (LaGuardia Airport). 4,673 nonstop flights in Jun 2025 to May 2026, 72% arrived within 15 minutes and 2.8% were cancelled. The most reliable flight number was Southwest 4532 at 6:10 AM.

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

DEN → LGA

Denver to New York: 4,673 nonstop flights a year

On time (12 months)

72%

Cancelled

2.8%

avg delay 21 min

Best time to leave

Before 9 AM

89% on time vs 61% 3 to 6 PM

Most reliable airline

Delta

75% chance on time

Check DEN to LGA 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 4532
6:10 AM → 11:50 AM3h 40m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 2572; its record covers all of them.
87%
chance on time
On time (history)
93%
Cancelled
4.0%
Avg arrival delay
3 min
- Arrived on time 93% of the time (72 flights, Jun 2025 to May 2026).
- Cancelled 4.0% of the time (3 of 75).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 3 to 6 PM: 61%).
- 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 · 72 flights
Find Southwest 4532 fares Opens this date on Aviasales
#2 · United 1442
8:08 AM → 1:57 PM3h 51m nonstop
Local times, typical schedule. Last flown 2026-05-31.
86%
chance on time
On time (history)
90%
Cancelled
2.9%
Avg arrival delay
9 min
- Arrived on time 90% of the time (200 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 3 to 6 PM: 61%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Lands inside LGA's trouble window: 54% of its 285 ground stops and delay programs started between noon and 6 PM.
Strong track record · 200 flights
Find United 1442 fares Opens this date on Aviasales
#3 · Delta 398
7:10 AM → 12:51 PM3h 44m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
On time (history)
87%
Cancelled
2.0%
Avg arrival delay
14 min
- Arrived on time 87% of the time (245 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 3 to 6 PM: 61%).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Lands inside LGA's trouble window: 54% of its 285 ground stops and delay programs started between noon and 6 PM.
Strong track record · 245 flights
Find Delta 398 fares Opens this date on Aviasales
#4 · Delta 447
7:30 AM → 1:16 PM3h 46m nonstop
Local times, typical schedule. Last flown 2026-04-12.
81%
chance on time
On time (history)
84%
Cancelled
11.1%
Avg arrival delay
5 min
- Arrived on time 84% of the time (32 flights, Jun 2025 to May 2026).
- Cancelled 11.1% of the time (4 of 36).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 3 to 6 PM: 61%).
- 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 · 32 flights
Find Delta 447 fares Opens this date on Aviasales
#5 · United 2446
9:49 AM → 3:47 PM3h 56m nonstop
Local times, typical schedule. Last flown 2026-05-31.
79%
chance on time
On time (history)
82%
Cancelled
1.3%
Avg arrival delay
12 min
- Arrived on time 82% of the time (295 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 LGA's trouble window: 54% of its 285 ground stops and delay programs started between noon and 6 PM.
Strong track record · 295 flights
Find United 2446 fares Opens this date on Aviasales
#6 · Delta 751
11:38 AM → 5:30 PM3h 43m nonstop
Local times, typical schedule. Last flown 2026-05-31.
76%
chance on time
On time (history)
79%
Cancelled
3.9%
Avg arrival delay
16 min
- Arrived on time 79% of the time (345 flights, Jun 2025 to May 2026).
- Cancelled 3.9% of the time (14 of 363).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Lands inside LGA's trouble window: 54% of its 285 ground stops and delay programs started between noon and 6 PM.
Strong track record · 345 flights
Find Delta 751 fares Opens this date on Aviasales
#7 · Southwest 360
9:20 AM → 3:00 PM3h 40m nonstop
Local times, typical schedule. Last flown 2026-05-29. Same departure also flew as Southwest 3771; its record covers all of them.
72%
chance on time
On time (history)
77%
Cancelled
3.0%
Avg arrival delay
12 min
- Arrived on time 77% of the time (65 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 LGA's trouble window: 54% of its 285 ground stops and delay programs started between noon and 6 PM.
Moderate track record · 65 flights
Find Southwest 360 fares Opens this date on Aviasales
#8 · United 1579
2:10 PM → 7:59 PM3h 49m nonstop
Local times, typical schedule. Last flown 2026-05-31.
70%
chance on time
On time (history)
74%
Cancelled
2.1%
Avg arrival delay
24 min
- Arrived on time 74% of the time (275 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.
Strong track record · 275 flights
Find United 1579 fares Opens this date on Aviasales
#9 · United 598
11:30 AM → 5:23 PM3h 53m nonstop
Local times, typical schedule. Last flown 2026-05-31.
69%
chance on time
On time (history)
69%
Cancelled
3.1%
Avg arrival delay
18 min
- Arrived on time 69% of the time (245 flights, Jun 2025 to May 2026).
- Cancelled 3.1% of the time (8 of 258).
- Departs outside DEN's trouble window (2 PM to 8 PM, when 79% of its 174 ground stops and delay programs started).
- Lands inside LGA's trouble window: 54% of its 285 ground stops and delay programs started between noon and 6 PM.
Strong track record · 245 flights
Find United 598 fares Opens this date on Aviasales
#10 · United 2168
4:05 PM → 9:54 PM3h 49m nonstop
Local times, typical schedule. Last flown 2026-05-31.
66%
chance on time
On time (history)
69%
Cancelled
1.9%
Avg arrival delay
25 min
- Arrived on time 69% of the time (253 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 61% on time; Before 9 AM: 89%).
- Departs inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
Strong track record · 253 flights
Find United 2168 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

Delta Air Lines75%
1,038 flights · 79% on time as flown · 4.4% cancel
United Airlines72%
2,013 flights · 74% on time as flown · 2.0% cancel
Southwest Airlines63%
1,441 flights · 64% on time as flown · 2.7% cancel
Frontier Airlines63%
181 flights · 61% on time as flown · 4.0% cancel

On time by departure time

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

Before 9 AM89%
1,055 flights · avg delay 9 min
9 AM to noon73%
1,414 flights · avg delay 17 min
Noon to 3 PM66%
688 flights · avg delay 27 min
3 to 6 PM61%
1,516 flights · avg delay 29 min

Best day: Saturday (79%). Worst: Friday (72%).

Smarter routing

Nearby airports that run more on time

DEN → JFK 77% chance on time
Denver International Airport to John F. Kennedy International Airport · 1,578 flights a year · 11 mi from your airports · yours: 70%
Rank flights Fares
DEN → EWR 75% chance on time
Denver International Airport to Newark Liberty International Airport · 3,293 flights a year · 17 mi from your airports · yours: 70%
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

Air traffic control and airport volume44%
Late-arriving aircraft28%
Airline (crew, maintenance, boarding)25%
Severe weather3%

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 LGA questions

What time of day is best to fly DEN to LGA?: Before 9 AM: 89% of flights arrived on time, against 61% 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 DEN to LGA?: Delta, with a season-adjusted 75% chance of operating and arriving on time over 1,038 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 LGA?: July (62% on time); the best was April (81%), 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 DEN

Live status: FAA delays and ground stops

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