LAS to MDW flight delays & on-time performance
Nonstop flights from Harry Reid International Airport to Chicago Midway International Airport · 1,521 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at LAS or MDW right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Las Vegas (LAS) to Chicago (MDW) arrived on time 76% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.7% were cancelled, and 5% arrived an hour or more late.
- Departures scheduled around 6am did best (98% on time); around 6pm did worst (49%).
- Wednesday was the most reliable day to fly (82% on time) and Friday the least (71%).
- The largest source of delay minutes was late-arriving aircraft (45%).
Which airline is most on time from LAS 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 | 76% | 0.7% | 12 min | 5.2% | 2,298 |
| Allegiant Air | 50% | 0.0% | 74 min | 50.0% | 2 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am95%179 flights
- 6am98%173 flights
- 7am92%144 flights
- 8am79%172 flights
- 9am76%59 flights
- 10am84%103 flights
- 11am75%227 flights
- 12pm58%97 flights
- 1pm67%78 flights
- 2pm73%120 flights
- 3pm58%136 flights
- 4pm68%157 flights
- 5pm61%94 flights
- 6pm49%145 flights
- 7pm23%44 flights
- 11pm86%364 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday73%0.6% cancelled
- Tuesday81%0.0% cancelled
- Wednesday82%0.3% cancelled
- Thursday72%0.3% cancelled
- Friday71%1.4% cancelled
- Saturday81%1.1% cancelled
- Sunday74%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 aircraft45%
- Airline (crew, maintenance, cleaning, fueling)41%
- Air traffic control & airport congestion13%
- Extreme weather1%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather75%
- Airline (crew, maintenance, cleaning, fueling)19%
- Air traffic control & airport congestion6%
- Security0%
LAS to MDW: common questions
- How often are LAS to MDW flights on time?
- 76% 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 Las Vegas to Chicago cancelled?
- 0.7% of scheduled flights were cancelled (16 of 2,300).
- How long are typical delays?
- Across all flights the average arrival delay was 12 min (early arrivals count as zero). Flights that were late arrived 46 min behind schedule on average, and 5.2% of flights were an hour or more late.
- How long is taxi time at LAS?
- Flights on this route spent 16 min taxiing from the gate to takeoff on average.
Related routes
Return trip: MDW to LAS — 77% on time
More flights from Las Vegas
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: LAS → MDW, nonstop flights by US airlines that report to the DOT. How we calculate this.