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Flight Reliability

DL 1045 · Delta Air Lines

Los Angeles → Seattle (LAX–SEA)93% of its flights flew this route. The rest (BOS–PHX, SDF–DTW) are included in these numbers.

93
Nerd Approved
WanderNerd Reliability Score
88%
Arrive within 15 minutes
6 min early
Average arrival delay
0.9%
Cancelled
16 min early
Median arrival delay

Based on 349 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

DL 1045 departing between 3–6 PM arrived on time 92% of the time, versus 67% between 6–9 PM.

Skip Saturday if you can.

DL 1045 arrived on time 96% of the time on Thursdays. On Saturdays: 81%.

Better than the Delta Air Lines network average.

DL 1045 arrived on time 88% of the time, versus 81% across the Delta Air Lines network.

Ticking up lately.

DL 1045 arrived on time 91% of the time over the last three months in the data, compared with 88% in the three months before that.

The breakdown

On-time by weekday
  • Mon86%(49 flights)
  • Tue94%(49 flights)
  • Wed85%(47 flights)
  • Thu96%(50 flights)
  • Fri82%(51 flights)
  • Sat81%(48 flights)
  • Sun94%(52 flights)
On-time by departure window
  • 9 AM–12 PM89%(272 flights)
  • 12–3 PM92%(49 flights)
  • 3–6 PM92%(13 flights)
  • 6–9 PM67%(12 flights)
On-time trend by month
87%
May

Jun 70% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202570%30
July 202594%31
August 202587%31
September 202597%30
October 202587%31
November 202590%30
December 202593%27
January 202689%26
February 202682%22
March 202685%27
April 2026100%30
May 202687%31
Departures on time
84%
Diverted
0%
Flights flown
346
Months covered
12

Same route, other flights

Keep nerding

Based on 349 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.