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Flight Reliability

DL 545 · Delta Air Lines

Atlanta → San Francisco (ATL–SFO)88% of its flights flew this route. The rest (LAS–ATL, MSP–ATL) are included in these numbers.

70
Usually Fine
WanderNerd Reliability Score
68%
Arrive within 15 minutes
17 min
Average arrival delay
0.7%
Cancelled
1 min early
Median arrival delay

Based on 299 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

DL 545 departing between 12–3 PM arrived on time 92% of the time, versus 66% between 6–9 PM.

Sunday scaries are real for this one.

DL 545 arrived on time 76% of the time on Thursdays and just 54% on Sundays. That gap is worth planning around.

A bit behind the ATL–SFO route.

DL 545 arrived on time 68% of the time, versus 73% across the ATL–SFO route.

Lagging the Delta Air Lines network.

DL 545 arrived on time 68% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon64%(50 flights)
  • Tue68%(38 flights)
  • Wed74%(34 flights)
  • Thu76%(42 flights)
  • Fri76%(42 flights)
  • Sat69%(45 flights)
  • Sun54%(46 flights)
On-time by departure window
  • 6–9 AM69%(13 flights)
  • 9 AM–12 PM—(5 flights)
  • 12–3 PM92%(25 flights)
  • 6–9 PM66%(230 flights)
  • 9 PM–12 AM67%(24 flights)
On-time trend by month
36%
May

Jun 59% → May 36% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202559%29
July 202571%28
August 202565%31
September 202580%30
October 202570%23
November 202574%27
December 202562%13
February 2026100%19
March 202681%31
April 202669%29
May 202636%31
Departures on time
71%
Diverted
0%
Flights flown
297
Months covered
12

Same route, other flights

Keep nerding

Based on 299 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.