Route on-time record

MDW to PHX: most on-time flights and the best time to fly

Chicago (Chicago Midway International Airport) to Phoenix (Phoenix Sky Harbor International Airport). 2,820 nonstop flights in Jun 2025 to May 2026, 76% arrived within 15 minutes and 1.6% were cancelled. The most reliable flight number was Southwest 1522 at 5:05 AM.

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

MDW → PHX

Chicago to Phoenix: 2,820 nonstop flights a year

On time (12 months)

76%

Cancelled

1.6%

avg delay 15 min

Best time to leave

Before 9 AM

89% on time vs 52% after 9 PM

Most reliable airline

Southwest

75% chance on time

Check MDW to PHX 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 1522
5:05 AM → 7:00 AM3h 55m nonstop
Local times, typical schedule. Last flown 2026-04-06.
90%
chance on time
On time (history)
95%
Cancelled
4.5%
Avg arrival delay
2 min
- Arrived on time 95% of the time (21 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; After 9 PM: 52%).
- Departs outside MDW's trouble window (7 AM to 1 PM, when 50% of its 30 ground stops and delay programs started).
- Short track record (21 flights), so its score leans on the airline's record at this hour.
Limited track record · 21 flights
Find Southwest 1522 fares Opens this date on Aviasales
#2 · Southwest 3340
5:25 AM → 7:10 AM3h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31.
90%
chance on time
On time (history)
91%
Cancelled
0.0%
Avg arrival delay
6 min
- Arrived on time 91% of the time (54 flights, Jun 2025 to May 2026).
- Never cancelled in 54 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; After 9 PM: 52%).
- Departs outside MDW's trouble window (7 AM to 1 PM, when 50% of its 30 ground stops and delay programs started).
Limited track record · 54 flights
Find Southwest 3340 fares Opens this date on Aviasales
#3 · Southwest 1763
8:35 AM → 10:30 AM3h 55m nonstop
Local times, typical schedule. Last flown 2026-05-29.
87%
chance on time
On time (history)
96%
Cancelled
0.0%
Avg arrival delay
2 min
- Arrived on time 96% of the time (23 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; After 9 PM: 52%).
- Departs inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
- Short track record (23 flights), so its score leans on the airline's record at this hour.
Limited track record · 23 flights
Find Southwest 1763 fares Opens this date on Aviasales
#4 · Southwest 4631
6:55 AM → 8:45 AM3h 50m nonstop
Local times, typical schedule. Last flown 2026-05-31.
86%
chance on time
On time (history)
93%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 93% of the time (30 flights, Jun 2025 to May 2026).
- Never cancelled in 30 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; After 9 PM: 52%).
- Departs outside MDW's trouble window (7 AM to 1 PM, when 50% of its 30 ground stops and delay programs started).
Limited track record · 30 flights
Find Southwest 4631 fares Opens this date on Aviasales
#5 · Southwest 3165
9:10 AM → 11:00 AM3h 50m nonstop
Local times, typical schedule. Last flown 2026-05-30.
84%
chance on time
On time (history)
92%
Cancelled
0.0%
Avg arrival delay
3 min
- Arrived on time 92% of the time (24 flights, Jun 2025 to May 2026).
- Departs inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
- Short track record (24 flights), so its score leans on the airline's record at this hour.
Limited track record · 24 flights
Find Southwest 3165 fares Opens this date on Aviasales
#6 · Southwest 3293
9:25 AM → 11:20 AM3h 55m nonstop
Local times, typical schedule. Last flown 2026-04-06.
84%
chance on time
On time (history)
93%
Cancelled
3.6%
Avg arrival delay
12 min
- Arrived on time 93% of the time (27 flights, Jun 2025 to May 2026).
- Departs inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
- Short track record (27 flights), so its score leans on the airline's record at this hour.
Limited track record · 27 flights
Find Southwest 3293 fares Opens this date on Aviasales
#7 · Southwest 873
7:20 AM → 9:15 AM3h 55m nonstop
Local times, typical schedule. Last flown 2026-04-06.
83%
chance on time
On time (history)
93%
Cancelled
3.6%
Avg arrival delay
3 min
- Arrived on time 93% of the time (27 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; After 9 PM: 52%).
- Departs inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
- Short track record (27 flights), so its score leans on the airline's record at this hour.
Limited track record · 27 flights
Find Southwest 873 fares Opens this date on Aviasales
#8 · Southwest 3465
7:30 AM → 9:20 AM3h 50m nonstop
Local times, typical schedule. Last flown 2026-05-27.
80%
chance on time
On time (history)
81%
Cancelled
0.0%
Avg arrival delay
7 min
- Arrived on time 81% of the time (16 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; After 9 PM: 52%).
- Departs inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
- Short track record (16 flights), so its score leans on the airline's record at this hour.
Limited track record · 16 flights
Find Southwest 3465 fares Opens this date on Aviasales
#9 · Southwest 3425
12:20 PM → 2:15 PM3h 55m nonstop
Local times, typical schedule. Last flown 2026-04-06.
77%
chance on time
On time (history)
77%
Cancelled
6.1%
Avg arrival delay
9 min
- Arrived on time 77% of the time (31 flights, Jun 2025 to May 2026).
- Cancelled 6.1% of the time (2 of 33).
- Departs inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
- Lands inside PHX's trouble window: 43% of its 46 ground stops and delay programs started between 2 PM and 8 PM.
Limited track record · 31 flights
Find Southwest 3425 fares Opens this date on Aviasales
#10 · Southwest 3607
3:15 PM → 5:00 PM3h 45m nonstop
Local times, typical schedule. Last flown 2026-05-30.
75%
chance on time
On time (history)
88%
Cancelled
0.0%
Avg arrival delay
8 min
- Arrived on time 88% of the time (8 flights, Jun 2025 to May 2026).
- Departs outside MDW's trouble window (7 AM to 1 PM, when 50% of its 30 ground stops and delay programs started).
- Lands inside PHX's trouble window: 43% of its 46 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 3607 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

Southwest Airlines75%
2,684 flights · 76% on time as flown · 1.6% cancel
Frontier Airlines74%
136 flights · 75% on time as flown · 1.5% cancel

On time by departure time

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

Before 9 AM89%
786 flights · avg delay 7 min
9 AM to noon82%
455 flights · avg delay 10 min
Noon to 3 PM78%
461 flights · avg delay 16 min
3 to 6 PM70%
491 flights · avg delay 19 min
6 to 9 PM63%
459 flights · avg delay 24 min
After 9 PM52%
168 flights · avg delay 28 min

Best day: Saturday (80%). Worst: Thursday (73%).

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 aircraft44%
Airline (crew, maintenance, boarding)37%
Air traffic control and airport volume15%
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

MDW to PHX questions

What time of day is best to fly MDW to PHX?: Before 9 AM: 89% of flights arrived on time, against 52% for departures after 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 MDW to PHX?: Southwest, with a season-adjusted 75% chance of operating and arriving on time over 2,684 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 MDW to PHX?: July (64% on time); the best was November (84%), 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 MDW

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