Route on-time record

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

Memphis (Memphis International Airport) to Denver (Denver International Airport). 1,304 nonstop flights in Jun 2025 to May 2026, 79% arrived within 15 minutes and 1.0% were cancelled. The most reliable flight number was Southwest 3406 at 6:10 AM.

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

MEM → DEN

Memphis to Denver: 1,304 nonstop flights a year

On time (12 months)

79%

Cancelled

1.0%

avg delay 17 min

Best time to leave

Before 9 AM

87% on time vs 67% 6 to 9 PM

Most reliable airline

United

79% chance on time

Check MEM to DEN 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 3406
6:10 AM → 7:40 AM2h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 2797; its record covers all of them.
88%
chance on time
On time (history)
90%
Cancelled
0.0%
Avg arrival delay
10 min
- Arrived on time 90% of the time (79 flights, Jun 2025 to May 2026).
- Never cancelled in 79 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 87% on time; 6 to 9 PM: 67%).
Moderate track record · 79 flights
Find Southwest 3406 fares Opens this date on Aviasales
#2 · United 472
8:40 AM → 10:26 AM2h 47m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
On time (history)
87%
Cancelled
2.1%
Avg arrival delay
13 min
- Arrived on time 87% of the time (143 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 87% on time; 6 to 9 PM: 67%).
Moderate track record · 143 flights
Find United 472 fares Opens this date on Aviasales
#3 · United 778
4:05 PM → 5:56 PM2h 51m nonstop
Local times, typical schedule. Last flown 2026-03-28.
81%
chance on time
On time (history)
86%
Cancelled
3.7%
Avg arrival delay
14 min
- Arrived on time 86% of the time (79 flights, Jun 2025 to May 2026).
- Cancelled 3.7% of the time (3 of 82).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
Moderate track record · 79 flights
Find United 778 fares Opens this date on Aviasales
#4 · United 1712
3:58 PM → 5:45 PM2h 47m nonstop
Local times, typical schedule. Last flown 2026-04-29.
78%
chance on time
On time (history)
84%
Cancelled
0.0%
Avg arrival delay
40 min
- Arrived on time 84% of the time (32 flights, Jun 2025 to May 2026).
- Never cancelled in 32 scheduled flights.
- 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 (32 flights), so its score leans on the airline's record at this hour.
Limited track record · 32 flights
Find United 1712 fares Opens this date on Aviasales
#5 · United 498
3:23 PM → 5:10 PM2h 47m nonstop
Local times, typical schedule. Last flown 2026-05-31.
78%
chance on time
On time (history)
84%
Cancelled
3.1%
Avg arrival delay
16 min
- Arrived on time 84% of the time (31 flights, Jun 2025 to May 2026).
- Cancelled 3.1% of the time (1 of 32).
- 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 (31 flights), so its score leans on the airline's record at this hour.
Limited track record · 31 flights
Find United 498 fares Opens this date on Aviasales
#6 · Frontier 4625
7:54 PM → 9:44 PM2h 44m nonstop
Local times, typical schedule. Last flown 2026-05-29.
69%
chance on time
On time (history)
71%
Cancelled
0.8%
Avg arrival delay
20 min
- Arrived on time 71% of the time (128 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 67% on time; Before 9 AM: 87%).
Moderate track record · 128 flights
Find Frontier 4625 fares Opens this date on Aviasales
#7 · Southwest 2730
5:00 PM → 6:35 PM2h 35m nonstop
Local times, typical schedule. Last flown 2026-04-01.
68%
chance on time
On time (history)
50%
Cancelled
0.0%
Avg arrival delay
40 min
- Arrived on time 50% of the time (8 flights, Jun 2025 to May 2026).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
- 91% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 2730 fares Opens this date on Aviasales
#8 · Southwest 2585
6:20 PM → 7:50 PM2h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 2596; its record covers all of them.
62%
chance on time
On time (history)
58%
Cancelled
0.0%
Avg arrival delay
26 min
- Arrived on time 58% of the time (74 flights, Jun 2025 to May 2026).
- Never cancelled in 74 scheduled flights.
- Leaves in this route's least on-time window (6 to 9 PM: 67% on time; Before 9 AM: 87%).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
Moderate track record · 74 flights
Find Southwest 2585 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

United Airlines79%
728 flights · 80% on time as flown · 1.2% cancel
Southwest Airlines79%
439 flights · 79% on time as flown · 0.8% cancel
Frontier Airlines72%
136 flights · 70% on time as flown · 0.9% cancel

On time by departure time

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

Before 9 AM87%
537 flights · avg delay 9 min
9 AM to noon84%
148 flights · avg delay 10 min
3 to 6 PM72%
432 flights · avg delay 25 min
6 to 9 PM67%
157 flights · avg delay 27 min

Best day: Wednesday (83%). Worst: Thursday (78%).

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)32%
Air traffic control and airport volume32%
Late-arriving aircraft27%
Severe weather8%

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

MEM to DEN questions

What time of day is best to fly MEM to DEN?: Before 9 AM: 87% of flights arrived on time, against 67% 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 MEM to DEN?: United, with a season-adjusted 79% chance of operating and arriving on time over 728 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 MEM to DEN?: June (66% on time); the best was October (88%), 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 MEM

Live status: FAA delays and ground stops

All Products

Aviation Intelligence

Alerts & Airspace

Free Pilot Tools & Widgets

RC Aviation

Games & Learning

Weather Research & More

Pilot Resources

My Airports

Ask ATIS