ON TIMEBOARD
MDW Chicago / JAX Jacksonville

MDW → JAX on time

Chicago Midway (Chicago, IL) to Jacksonville (Jacksonville, FL). Every scheduled flight, September 2025 to August 2026.

On time
70%
arrived < 15 min late
Cancelled
1.0%
417 flights
Typical arrival
−1 min
median vs schedule
When late
+52 min
average delay
Flights / day
1
1 airline

70% of flights from Chicago to Jacksonville arrived on time over the past 12 months. That is worse than the typical U.S. route. 9% of flights arrived more than an hour late or not at all.

How late?

The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for MDW → JAX: when a flight was late, it was under 45 minutes late 64% of the time. About 1 in 12 flights landed an hour or more late, and 1 in 139 three hours or more; 1.0% were cancelled outright.

Share of all 417 scheduled flights, past 12 months, by arrival time against schedule.

By airline

AirlineFlightsOn timeCancelledTypical arrival1h+ lateAvg when lateOperated by
Southwest Airlines41770%1.0%−1 min8.2%+52 minSouthwest Airlines

Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.

Best time of day to fly

On-time rate by scheduled departure hour (local time at MDW). Delays build through the day as late planes knock on, so early flights usually do best.

40%70%100%8 a.m. departures: too few flights (30 flights)8a9 a.m. departures: too few flights (1 flights)9a10 a.m. departures: too few flights (36 flights)10a11 a.m. departures: too few flights (32 flights)11anoon departures: too few flights (24 flights)12p1 p.m. departures: too few flights (91 flights)1p2 p.m. departures: too few flights (8 flights)2p3 p.m. departures: too few flights (16 flights)3p4 p.m. departures: too few flights4p5 p.m. departures: too few flights (18 flights)5p6 p.m. departures: 54% on time (114 flights)546p7 p.m. departures: too few flights (33 flights)7p
MDW → JAX, share of flights arriving on time, by departure hour. Hours with under 100 flights are greyed out.
82%+ on time76–82%68–76%under 68%too few flights

By month

Each calendar month pooled over 2023–2026. Best: October (91%). Worst: July (63%).

40%70%100%Jan: too few flights (78 flights)JanFeb: too few flights (74 flights)FebMar: 76% on time (104 flights)76MarApr: too few flights (90 flights)AprMay: too few flights (90 flights)MayJun: 65% on time (139 flights)65JunJul: 63% on time (150 flights)63JulAug: 71% on time (110 flights)71AugSep: 89% on time (102 flights)89SepOct: 91% on time (105 flights)91OctNov: too few flights (90 flights)NovDec: too few flights (93 flights)Dec

By day of week

DayFlightsOn timeCancelled
Monday62——
Tuesday60——
Wednesday60——
Thursday60——
Friday61——
Saturday52——
Sunday62——

Why flights were late

Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.

Late inbound plane 59%Airline (crew, maintenance, ops) 29%Air traffic & airport (NAS) 8%Severe weather 3%Security 1%

Cancellations: weather 2 · air traffic/airport 2

Month by month

Not enough months with data to draw a trend.

Nearby airport alternatives

Other ways to make the same trip, using airports within 60 miles of Chicago or Jacksonville. None has been clearly more reliable than MDW → JAX.

RouteFlightsOn timeCancelled
MDW → JAX (this route)41770%1.0%
ORD → JAX Chicago O'Hare to Jacksonville2,17272%1.3%

Questions

How often are flights from MDW to JAX on time?

70% of 417 scheduled flights from Chicago, IL to Jacksonville, FL arrived within 15 minutes of schedule between September 2025 and August 2026. 1.0% were cancelled.

What month has the most delays from MDW to JAX?

July (63% on time). The best month is October (91%), over 2023–2026.

Related

Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.