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Flight Reliability

DL 2108 · Delta Air Lines

Seattle → Chicago (SEA–ORD)

73
Usually Fine
WanderNerd Reliability Score
77%
Arrive within 15 minutes
13 min
Average arrival delay
1.4%
Cancelled
5 min early
Median arrival delay

Based on 363 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

DL 2108 departing between 3–6 PM arrived on time 78% of the time, versus 69% between 6–9 PM.

Mondays have been rough.

DL 2108 arrived on time 87% of the time on Wednesdays and just 70% on Mondays. That gap is worth planning around.

A bit behind the Delta Air Lines network.

DL 2108 arrived on time 77% of the time, versus 81% across the Delta Air Lines network.

Trending in the right direction.

DL 2108 arrived on time 78% of the time over the last three months in the data, compared with 68% in the three months before that.

The breakdown

On-time by weekday
  • Mon70%(50 flights)
  • Tue71%(51 flights)
  • Wed87%(52 flights)
  • Thu75%(51 flights)
  • Fri80%(50 flights)
  • Sat78%(49 flights)
  • Sun78%(51 flights)
On-time by departure window
  • 3–6 PM78%(325 flights)
  • 6–9 PM69%(29 flights)
On-time trend by month
87%
May

Jun 83% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%30
July 202577%30
August 202583%30
September 202593%30
October 202587%31
November 202558%26
December 202542%31
January 202671%31
February 202692%26
March 202666%29
April 202683%29
May 202687%31
Departures on time
74%
Diverted
1.1%
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.