Route on-time record
MKE to DEN: most on-time flights and the best time to fly
Milwaukee (General Mitchell International Airport) to Denver (Denver International Airport). 2,340 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 0.5% were cancelled. The most reliable flight number was Southwest 2431 at 5:40 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
MKE → DEN
Milwaukee to Denver: 2,340 nonstop flights a year
On time (12 months)
78%
Cancelled
0.5%
avg delay 15 min
Best time to leave
Before 9 AM
89% on time vs 60% 6 to 9 PM
Most reliable airline
Southwest
79% chance on time
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 2431
5:40 AM → 7:30 AM2h 50m nonstop
Local times, typical schedule. Last flown 2026-04-06.
94%
chance on time
- On time (history)
- 97%
- Cancelled
- 3.0%
- Avg arrival delay
- 3 min
- Arrived on time 97% of the time (32 flights, Jun 2025 to May 2026).
- Cancelled 3.0% of the time (1 of 33).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 60%).
- Short track record (32 flights), so its score leans on the airline's record at this hour.
Limited track record · 32 flights
Find Southwest 2431 fares Opens this date on Aviasales#2 · Southwest 2910
6:10 AM → 7:45 AM2h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
93%
chance on time
- On time (history)
- 98%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 98% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 60%).
- Short track record (55 flights), so its score leans on the airline's record at this hour.
Limited track record · 55 flights
Find Southwest 2910 fares Opens this date on Aviasales#3 · Southwest 3152
10:20 AM → 12:00 PM2h 40m nonstop
Local times, typical schedule. Last flown 2026-04-06.
84%
chance on time
- On time (history)
- 85%
- Cancelled
- 3.6%
- Avg arrival delay
- 7 min
- Arrived on time 85% of the time (27 flights, Jun 2025 to May 2026).
- Short track record (27 flights), so its score leans on the airline's record at this hour.
Limited track record · 27 flights
Find Southwest 3152 fares Opens this date on Aviasales#4 · SkyWest 5536 · sold as United Express, Delta Connection, American Eagle or Alaska
10:44 AM → 12:33 PM2h 49m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 82% of the time (11 flights, Jun 2025 to May 2026).
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find 10:44 AM flight fares Opens this date on Aviasales#5 · United 1204
8:15 AM → 10:02 AM2h 47m nonstop
Local times, typical schedule. Last flown 2026-05-20.
82%
chance on time
- On time (history)
- 84%
- Cancelled
- 0.0%
- Avg arrival delay
- 10 min
- Arrived on time 84% of the time (77 flights, Jun 2025 to May 2026).
- Never cancelled in 77 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 60%).
Moderate track record · 77 flights
Find United 1204 fares Opens this date on Aviasales#6 · SkyWest 5558 · sold as United Express, Delta Connection, American Eagle or Alaska
8:16 AM → 10:05 AM2h 49m nonstop
Local times, typical schedule. Last flown 2026-05-31.
81%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 7 min
- Arrived on time 82% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; 6 to 9 PM: 60%).
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find 8:16 AM flight fares Opens this date on Aviasales#7 · United 2822
2:35 PM → 4:21 PM2h 46m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 696; its record covers all of them.
78%
chance on time
- On time (history)
- 78%
- Cancelled
- 0.0%
- Avg arrival delay
- 23 min
- Arrived on time 78% 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 2822 fares Opens this date on Aviasales#8 · Southwest 2657
12:50 PM → 2:25 PM2h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
74%
chance on time
- On time (history)
- 71%
- Cancelled
- 0.0%
- Avg arrival delay
- 10 min
- Arrived on time 71% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 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 (55 flights), so its score leans on the airline's record at this hour.
Limited track record · 55 flights
Find Southwest 2657 fares Opens this date on Aviasales#9 · United 2218
4:13 PM → 6:00 PM2h 47m nonstop
Local times, typical schedule. Last flown 2026-04-29. Same departure also flew as United 1267; its record covers all of them.
73%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.0%
- Avg arrival delay
- 17 min
- Arrived on time 75% of the time (52 flights, Jun 2025 to May 2026).
- Never cancelled in 52 scheduled flights.
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
- 50% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 52 flights
Find United 2218 fares Opens this date on Aviasales#10 · SkyWest 5445 · sold as United Express, Delta Connection, American Eagle or Alaska
5:53 PM → 7:50 PM2h 57m nonstop
Local times, typical schedule. Last flown 2026-05-20.
69%
chance on time
- On time (history)
- 72%
- Cancelled
- 0.0%
- Avg arrival delay
- 10 min
- Arrived on time 72% of the time (18 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.
- Short track record (18 flights), so its score leans on the airline's record at this hour.
Limited track record · 18 flights
Find 5:53 PM flight fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines79%
1,261 flights · 80% on time as flown · 0.8% cancel
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)79%
239 flights · 78% on time as flown · 0.2% cancel
- United Airlines76%
771 flights · 77% on time as flown · 0.2% cancel
- Frontier Airlines74%
69 flights · 71% on time as flown · 0.3% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM89%
800 flights · avg delay 8 min
- 9 AM to noon85%
395 flights · avg delay 10 min
- Noon to 3 PM79%
327 flights · avg delay 12 min
- 3 to 6 PM68%
452 flights · avg delay 25 min
- 6 to 9 PM60%
366 flights · avg delay 26 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
- Air traffic control and airport volume38%
- Late-arriving aircraft30%
- Airline (crew, maintenance, boarding)29%
- 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
MKE to DEN questions
- What time of day is best to fly MKE to DEN?
- Before 9 AM: 89% of flights arrived on time, against 60% 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 MKE to DEN?
- Southwest, with a season-adjusted 79% chance of operating and arriving on time over 1,261 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 MKE to DEN?
- July (73% on time); the best was November (87%), 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 MKE
- DEN to MKE (return)
- MKE to ORD 67%
- MKE to ATL 89%
- MKE to DTW 81%
- MKE to PHX 79%
- MKE to MSP 82%
- MKE to MCO 76%
- MKE to DCA 75%
- MKE to LAS 82%
- MKE to DFW 74%
- MKE to BNA 82%
- MKE to CLT 79%
- MKE to BWI 85%
Live status: FAA delays and ground stops