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Flight Reliability

DL 998 · Delta Air Lines

San Antonio → Atlanta (SAT–ATL)81% of its flights flew this route. The rest (MIA–BOS, BOS–MIA) are included in these numbers.

89
Pretty Reliable
WanderNerd Reliability Score
89%
Arrive within 15 minutes
2 min early
Average arrival delay
1.7%
Cancelled
10 min early
Median arrival delay

Based on 350 historical flights. Data through May 2026.

What the data says

The 6–9 AM departure wins.

DL 998 departing between 6–9 AM arrived on time 92% of the time, versus 75% between 9 AM–12 PM.

Skip Saturday if you can.

DL 998 arrived on time 94% of the time on Fridays. On Saturdays: 84%.

A bit ahead of the SAT–ATL route.

DL 998 arrived on time 89% of the time, versus 86% across the SAT–ATL route.

Better than the Delta Air Lines network average.

DL 998 arrived on time 89% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon90%(49 flights)
  • Tue92%(49 flights)
  • Wed90%(50 flights)
  • Thu85%(48 flights)
  • Fri94%(49 flights)
  • Sat84%(50 flights)
  • Sun90%(48 flights)
On-time by departure window
  • 6–9 AM92%(284 flights)
  • 9 AM–12 PM75%(47 flights)
  • 12–3 PM83%(12 flights)
On-time trend by month
83%
May

Jun 90% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%29
July 202584%31
August 202597%30
September 202597%30
October 202597%31
November 2025100%29
December 202594%17
January 202681%26
February 202668%28
March 202688%32
April 202693%30
May 202683%30
Departures on time
91%
Diverted
0.3%
Flights flown
343
Months covered
12

Same route, other flights

Keep nerding

Based on 350 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.