LAS to ORD flight delays & on-time performance
Nonstop flights from Harry Reid International Airport to Chicago O'Hare International Airport · 1,514 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at LAS or ORD 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 (ORD) arrived on time 77% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.3% were cancelled, and 8% arrived an hour or more late.
- United Airlines was the most punctual airline here (80% on time); Southwest Airlines was the least (68%).
- Departures scheduled around 6am did best (92% on time); around 12pm did worst (62%).
- Tuesday was the most reliable day to fly (84% on time) and Friday the least (71%).
- The largest source of delay minutes was late-arriving aircraft (42%).
Which airline is most on time from LAS to ORD?
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 |
|---|---|---|---|---|---|
| Spirit Airlines | 85% | 2.0% | 10 min | 4.6% | 199 |
| United Airlines | 80% | 0.5% | 16 min | 6.7% | 2,337 |
| American Airlines | 76% | 2.3% | 27 min | 9.8% | 1,889 |
| Southwest Airlines | 68% | 0.3% | 20 min | 9.4% | 608 |
| Frontier Airlines | 67% | 3.9% | 32 min | 15.4% | 204 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 12am74%172 flights
- 6am92%210 flights
- 7am88%566 flights
- 8am78%283 flights
- 9am84%369 flights
- 10am84%440 flights
- 11am79%202 flights
- 12pm62%499 flights
- 1pm66%101 flights
- 2pm66%428 flights
- 3pm64%408 flights
- 4pm74%258 flights
- 5pm74%381 flights
- 7pm82%69 flights
- 11pm82%805 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday72%2.0% cancelled
- Tuesday84%1.0% cancelled
- Wednesday79%0.9% cancelled
- Thursday78%0.9% cancelled
- Friday71%1.2% cancelled
- Saturday79%1.2% cancelled
- Sunday76%1.8% 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 aircraft42%
- Air traffic control & airport congestion28%
- Airline (crew, maintenance, cleaning, fueling)28%
- Extreme weather1%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather76%
- Airline (crew, maintenance, cleaning, fueling)15%
- Air traffic control & airport congestion9%
- Security0%
LAS to ORD: common questions
- How often are LAS to ORD flights on time?
- 77% 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?
- 1.3% of scheduled flights were cancelled (68 of 5,237).
- How long are typical delays?
- Across all flights the average arrival delay was 21 min (early arrivals count as zero). Flights that were late arrived 85 min behind schedule on average, and 8.4% of flights were an hour or more late.
- How long is taxi time at LAS?
- Flights on this route spent 18 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ORD to LAS — 74% 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 → ORD, nonstop flights by US airlines that report to the DOT. How we calculate this.