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Route Reliability

Las Vegas → Chicago

LAS–ORD · 1,514 miles · Harry Reid International Airport to Chicago O'Hare International Airport

78
Usually Fine
WanderNerd Reliability Score
77%
Arrive within 15 minutes
8 min
Average arrival delay
1.1%
Cancelled
5,368
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.Spirit Airlines84%324 flights
  2. 2.United Airlines81%2,332 flights
  3. 3.American Airlines76%1,817 flights
  4. 4.Frontier Airlines69%172 flights
  5. 5.Southwest Airlines69%723 flights

What the data says

Morning flights do better here.

LAS–ORD flights departing between 3–6 AM arrived on time 89% of the time, versus 63% between 12–3 PM.

Monday is the weak spot.

LAS–ORD flights arrived on time 82% of the time on Tuesdays. On Mondays: 73%.

Spirit Airlines has a clear lead on this route.

Spirit Airlines arrived on time 84% of the time on this route; Southwest Airlines managed 69%.

Slipping a little lately.

LAS–ORD flights arrived on time 76% of the time over the last three months in the data, compared with 81% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon73%(797 flights)
  • Tue82%(704 flights)
  • Wed81%(696 flights)
  • Thu78%(765 flights)
  • Fri74%(806 flights)
  • Sat80%(685 flights)
  • Sun76%(816 flights)
On-time by departure window
  • 12–3 AM75%(169 flights)
  • 3–6 AM89%(37 flights)
  • 6–9 AM88%(1067 flights)
  • 9 AM–12 PM83%(1085 flights)
  • 12–3 PM63%(1053 flights)
  • 3–6 PM70%(1091 flights)
  • 6–9 PM80%(90 flights)
  • 9 PM–12 AM85%(677 flights)
On-time trend by month
79%
May

Jun 78% → May 79% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202578%460
July 202572%469
August 202579%472
September 202578%478
October 202578%482
November 202575%378
December 202577%355
January 202680%352
February 202685%394
March 202672%464
April 202677%485
May 202679%480

Same trip, other airports

Keep nerding

Based on 5,368 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.