SLC to MDW flight delays & on-time performance
Nonstop flights from Salt Lake City International Airport to Chicago Midway International Airport · 1,259 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SLC or MDW right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Salt Lake City (SLC) to Chicago (MDW) arrived on time 84% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.6% were cancelled, and 1% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 8am did best (97% on time); around 2pm did worst (65%).
- Sunday was the most reliable day to fly (89% on time) and Monday the least (79%).
- The largest source of delay minutes was late-arriving aircraft (43%).
Which airline is most on time from SLC to MDW?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Southwest Airlines | 84% | 0.6% | 6 min | 1.3% | 619 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am95%94 flights
- 6am96%71 flights
- 7am92%101 flights
- 8am97%87 flights
- 12pm93%27 flights
- 1pm66%107 flights
- 2pm65%102 flights
- 3pm68%19 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday79%2.1% cancelled
- Tuesday80%0.0% cancelled
- Wednesday87%0.0% cancelled
- Thursday86%1.1% cancelled
- Friday84%0.0% cancelled
- Saturday81%0.0% cancelled
- Sunday89%1.1% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft43%
- Airline (crew, maintenance, cleaning, fueling)29%
- Air traffic control & airport congestion26%
- Extreme weather1%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather100%
- Airline (crew, maintenance, cleaning, fueling)0%
- Air traffic control & airport congestion0%
- Security0%
SLC to MDW: common questions
- How often are SLC to MDW flights on time?
- 84% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Salt Lake City to Chicago cancelled?
- 0.6% of scheduled flights were cancelled (4 of 619).
- How long are typical delays?
- Across all flights the average arrival delay was 6 min (early arrivals count as zero). Flights that were late arrived 33 min behind schedule on average, and 1.3% of flights were an hour or more late.
- How long is taxi time at SLC?
- Flights on this route spent 15 min taxiing from the gate to takeoff on average.
Related routes
Return trip: MDW to SLC — 70% on time
More flights from Salt Lake City
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SLC → MDW, nonstop flights by US airlines that report to the DOT. How we calculate this.