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Flight Reliability

DL 504 · Delta Air Lines

Orlando → Los Angeles (MCO–LAX)

91
Nerd Approved
WanderNerd Reliability Score
91%
Arrive within 15 minutes
5 min early
Average arrival delay
1.1%
Cancelled
12 min early
Median arrival delay

Based on 365 historical flights. Data through May 2026.

What the data says

Thursday is the weak spot.

DL 504 arrived on time 96% of the time on Tuesdays. On Thursdays: 83%.

Better than the MCO–LAX route average.

DL 504 arrived on time 91% of the time, versus 80% across the MCO–LAX route.

Better than the Delta Air Lines network average.

DL 504 arrived on time 91% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon84%(49 flights)
  • Tue96%(52 flights)
  • Wed96%(52 flights)
  • Thu83%(52 flights)
  • Fri90%(51 flights)
  • Sat94%(51 flights)
  • Sun90%(51 flights)
On-time trend by month
94%
May

Jun 93% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202593%30
July 202581%31
August 202581%31
September 202590%30
October 202584%31
November 202597%30
December 202596%28
January 202687%30
February 202696%27
March 202697%31
April 202693%28
May 202694%31
Departures on time
92%
Diverted
0.8%
Flights flown
358
Months covered
12

Same route, other flights

Keep nerding

Based on 365 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.