Route on-time record
MDW to JAX: most on-time flights and the best time to fly
Chicago (Chicago Midway International Airport) to Jacksonville (Jacksonville International Airport). 382 nonstop flights in Jun 2025 to May 2026, 75% arrived within 15 minutes and 0.8% were cancelled. The most reliable flight number was Southwest 1913 at 6:50 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
MDW → JAX
Chicago to Jacksonville: 382 nonstop flights a year
On time (12 months)
75%
Cancelled
0.8%
avg delay 16 min
Best time to leave
9 AM to noon
84% on time vs 63% 6 to 9 PM
Most reliable airline
Southwest
75% chance on time
Lowest nonstop fare seen in the next two months: $247 (Southwest 2946 on 2026-11-30). 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 1913
6:50 PM → 10:05 PM2h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 1864; its record covers all of them.
66%
chance on time
- On time (history)
- 63%
- Cancelled
- 1.1%
- Avg arrival delay
- 29 min
- Arrived on time 63% of the time (87 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 63% on time; 9 AM to noon: 84%).
- Departs outside MDW's trouble window (7 AM to 1 PM, when 50% of its 30 ground stops and delay programs started).
Moderate track record · 87 flights
Find Southwest 1913 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines75%
382 flights · 75% on time as flown · 0.8% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- 9 AM to noon84%
94 flights · avg delay 7 min
- Noon to 3 PM79%
139 flights · avg delay 11 min
- 3 to 6 PM70%
40 flights · avg delay 22 min
- 6 to 9 PM63%
96 flights · avg delay 27 min
Best day: Monday (86%). Worst: Friday (72%).
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 aircraft52%
- Airline (crew, maintenance, boarding)31%
- Air traffic control and airport volume12%
- Severe weather4%
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 JAX questions
- What time of day is best to fly MDW to JAX?
- 9 AM to noon: 84% of flights arrived on time, against 63% for departures 6 to 9 PM.
- Which airline is most on time from MDW to JAX?
- Southwest, with a season-adjusted 75% chance of operating and arriving on time over 382 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 JAX?
- July (65% on time); the best was October (91%), 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
- JAX 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