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Flight Reliability

DL 324 · Delta Air Lines

Boston → Seattle (BOS–SEA)

59
A Little Dicey
WanderNerd Reliability Score
64%
Arrive within 15 minutes
16 min
Average arrival delay
2.5%
Cancelled
5 min
Median arrival delay

Based on 363 historical flights. Data through May 2026.

What the data says

Sunday scaries are real for this one.

DL 324 arrived on time 68% of the time on Fridays. On Sundays: 57%.

Lagging the BOS–SEA route.

DL 324 arrived on time 64% of the time, versus 71% across the BOS–SEA route.

Well behind the Delta Air Lines network.

DL 324 arrived on time 64% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon67%(51 flights)
  • Tue60%(52 flights)
  • Wed65%(51 flights)
  • Thu65%(51 flights)
  • Fri68%(50 flights)
  • Sat68%(50 flights)
  • Sun57%(49 flights)
On-time by departure window
  • 3–6 PM67%(21 flights)
  • 6–9 PM64%(333 flights)
On-time trend by month
73%
May

Jun 55% → May 73% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202555%29
July 202555%29
August 202587%31
September 202580%30
October 202571%31
November 202568%28
December 202530%30
January 202669%29
February 202674%27
March 202636%31
April 202672%29
May 202673%30
Departures on time
73%
Diverted
0%
Flights flown
354
Months covered
12

Same route, other flights

Keep nerding

Based on 363 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.