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Flight Reliability

DL 700 · Delta Air Lines

Detroit → San Diego (DTW–SAN)99% of its flights flew this route. The rest (MIA–BOS) are included in these numbers.

62
A Little Dicey
WanderNerd Reliability Score
66%
Arrive within 15 minutes
20 min
Average arrival delay
1.1%
Cancelled
5 min
Median arrival delay

Based on 283 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

DL 700 departing between 9 PM–12 AM arrived on time 76% of the time, versus 65% between 6–9 PM.

Sunday scaries are real for this one.

DL 700 arrived on time 77% of the time on Wednesdays and just 52% on Sundays. That gap is worth planning around.

Lagging the DTW–SAN route.

DL 700 arrived on time 66% of the time, versus 77% across the DTW–SAN route.

Well behind the Delta Air Lines network.

DL 700 arrived on time 66% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon62%(47 flights)
  • Tue76%(38 flights)
  • Wed77%(34 flights)
  • Thu65%(43 flights)
  • Fri67%(46 flights)
  • Sat64%(22 flights)
  • Sun52%(48 flights)
On-time by departure window
  • 6–9 PM65%(257 flights)
  • 9 PM–12 AM76%(21 flights)
On-time trend by month
63%
May

Jun 52% → May 63% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202552%23
July 202552%21
August 202561%23
September 202559%17
October 202570%23
November 202553%17
December 202547%19
January 202653%30
February 202682%28
March 202687%30
April 202686%28
May 202663%19
Departures on time
66%
Diverted
0.7%
Flights flown
278
Months covered
12

Same route, other flights

Keep nerding

Based on 283 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.