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Flight Reliability

DL 684 · Delta Air Lines

New York → Portland (JFK–PDX)

55
A Little Dicey
WanderNerd Reliability Score
64%
Arrive within 15 minutes
18 min
Average arrival delay
3.0%
Cancelled
3 min
Median arrival delay

Based on 364 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

DL 684 departing between 3–6 PM arrived on time 68% of the time, versus 59% between 6–9 PM.

Sunday scaries are real for this one.

DL 684 arrived on time 69% of the time on Saturdays. On Sundays: 59%.

A bit behind the JFK–PDX route.

DL 684 arrived on time 64% of the time, versus 71% across the JFK–PDX route.

Well behind the Delta Air Lines network.

DL 684 arrived on time 64% of the time, versus 81% across the Delta Air Lines network.

The breakdown

On-time by weekday
  • Mon68%(50 flights)
  • Tue65%(49 flights)
  • Wed67%(51 flights)
  • Thu59%(49 flights)
  • Fri59%(51 flights)
  • Sat69%(51 flights)
  • Sun59%(51 flights)
On-time by departure window
  • 3–6 PM68%(181 flights)
  • 6–9 PM59%(171 flights)
On-time trend by month
69%
May

Jun 48% → May 69% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202548%29
July 202548%29
August 202587%31
September 202577%30
October 202570%30
November 202559%29
December 202553%30
January 202677%30
February 202668%25
March 202647%30
April 202660%30
May 202669%29
Departures on time
76%
Diverted
0.3%
Flights flown
352
Months covered
12

Same route, other flights

Keep nerding

Based on 364 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.