Route on-time record
MDW to SLC: most on-time flights and the best time to fly
Chicago (Chicago Midway International Airport) to Salt Lake City (Salt Lake City International Airport). 617 nonstop flights in Jun 2025 to May 2026, 71% arrived within 15 minutes and 1.9% were cancelled. The most reliable flight number was Southwest 416 at 10:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
MDW → SLC
Chicago to Salt Lake City: 617 nonstop flights a year
On time (12 months)
71%
Cancelled
1.9%
avg delay 15 min
Best time to leave
Before 9 AM
78% on time vs 55% after 9 PM
Most reliable airline
Southwest
69% chance on time
Lowest nonstop fare seen in the next two months: $307 (Southwest 4435 on 2026-10-27). 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 416
10:00 AM → 12:30 PM3h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 744; its record covers all of them.
73%
chance on time
- On time (history)
- 72%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 72% of the time (87 flights, Jun 2025 to May 2026).
- Never cancelled in 87 scheduled flights.
- Departs inside MDW's trouble window: 50% of its 30 ground stops and delay programs started between 7 AM and 1 PM.
Moderate track record · 87 flights
Find Southwest 416 fares Opens this date on Aviasales#2 · Southwest 2081
9:45 PM → 12:10 AM3h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31.
57%
chance on time
- On time (history)
- 52%
- Cancelled
- 0.0%
- Avg arrival delay
- 27 min
- Arrived on time 52% of the time (46 flights, Jun 2025 to May 2026).
- Never cancelled in 46 scheduled flights.
- Leaves in this route's least on-time window (After 9 PM: 55% on time; Before 9 AM: 78%).
- 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 · 46 flights
Find Southwest 2081 fares Opens this date on Aviasales#3 · Southwest 866
9:25 PM → 11:55 PM3h 30m nonstop
Local times, typical schedule. Last flown 2026-04-06.
57%
chance on time
- On time (history)
- 52%
- Cancelled
- 18.2%
- Avg arrival delay
- 23 min
- Arrived on time 52% of the time (27 flights, Jun 2025 to May 2026).
- Cancelled 18.2% of the time (6 of 33).
- Leaves in this route's least on-time window (After 9 PM: 55% on time; Before 9 AM: 78%).
- 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 · 27 flights
Find Southwest 866 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines69%
617 flights · 71% on time as flown · 1.9% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM78%
194 flights · avg delay 9 min
- 9 AM to noon75%
131 flights · avg delay 9 min
- Noon to 3 PM77%
35 flights · avg delay 14 min
- 6 to 9 PM70%
94 flights · avg delay 19 min
- After 9 PM55%
150 flights · avg delay 25 min
Best day: Saturday (80%). Worst: Sunday (75%).
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 aircraft47%
- Airline (crew, maintenance, boarding)31%
- Air traffic control and airport volume19%
- 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 SLC questions
- What time of day is best to fly MDW to SLC?
- Before 9 AM: 78% of flights arrived on time, against 55% 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 SLC?
- Southwest, with a season-adjusted 69% chance of operating and arriving on time over 617 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 SLC?
- July (64% on time); the best was September (86%), 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
- SLC to MDW (return)
- MDW to ATL 80%
- MDW to PHX 76%
- MDW to MCO 77%
- MDW to MSP 78%
- MDW to LAS 77%
- MDW to DEN 73%
- MDW to LGA 69%
- MDW to DAL 77%
- MDW to DCA 69%
- MDW to MCI 79%
- MDW to BNA 80%
- MDW to BWI 79%
Live status: FAA delays and ground stops