MDW to SLC flight delays & on-time performance
Nonstop flights from Chicago Midway International Airport to Salt Lake City International Airport · 1,259 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at MDW or SLC right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Chicago (MDW) to Salt Lake City (SLC) arrived on time 70% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.9% were cancelled, and 6% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 8am did best (79% on time); around 10pm did worst (47%).
- Thursday was the most reliable day to fly (73% on time) and Friday the least (66%).
- The largest source of delay minutes was late-arriving aircraft (49%).
Which airline is most on time from MDW to SLC?
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 | 70% | 1.9% | 14 min | 5.6% | 619 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am72%84 flights
- 8am79%75 flights
- 9am64%11 flights
- 10am76%148 flights
- 2pm78%32 flights
- 4pm69%13 flights
- 8pm79%74 flights
- 9pm56%121 flights
- 10pm47%39 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday71%3.2% cancelled
- Tuesday70%2.2% cancelled
- Wednesday71%0.0% cancelled
- Thursday73%2.2% cancelled
- Friday66%2.1% cancelled
- Saturday70%1.4% cancelled
- Sunday68%2.2% 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 aircraft49%
- Airline (crew, maintenance, cleaning, fueling)25%
- Air traffic control & airport congestion23%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather75%
- Airline (crew, maintenance, cleaning, fueling)17%
- Air traffic control & airport congestion8%
- Security0%
MDW to SLC: common questions
- How often are MDW to SLC flights on time?
- 70% 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 Chicago to Salt Lake City cancelled?
- 1.9% of scheduled flights were cancelled (12 of 619).
- How long are typical delays?
- Across all flights the average arrival delay was 14 min (early arrivals count as zero). Flights that were late arrived 42 min behind schedule on average, and 5.6% of flights were an hour or more late.
- How long is taxi time at MDW?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SLC to MDW — 84% on time
More flights from Chicago
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: MDW → SLC, nonstop flights by US airlines that report to the DOT. How we calculate this.