Flight Reliability
DL 2055 · Delta Air Lines
Seattle → Chicago (SEA–ORD)81% of its flights flew this route. The rest (ORD–SEA) are included in these numbers.
- 83%
- Arrive within 15 minutes
- 4 min
- Average arrival delay
- 0.5%
- Cancelled
- 5 min early
- Median arrival delay
Based on 370 historical flights. Data through May 2026.
What the data says
Morning-you made the right choice.
DL 2055 departing between 6–9 AM arrived on time 87% of the time, versus 67% between 12–3 PM.
Sunday scaries are real for this one.
DL 2055 arrived on time 95% of the time on Wednesdays and just 74% on Sundays. That gap is worth planning around.
Better than the SEA–ORD route average.
DL 2055 arrived on time 83% of the time, versus 76% across the SEA–ORD route.
Trending in the right direction.
DL 2055 arrived on time 87% of the time over the last three months in the data, compared with 73% in the three months before that.
The breakdown
- Mon76%(59 flights)
- Tue83%(58 flights)
- Wed95%(59 flights)
- Thu85%(58 flights)
- Fri85%(58 flights)
- Sat81%(21 flights)
- Sun74%(53 flights)
- 6–9 AM87%(286 flights)
- 9 AM–12 PM80%(10 flights)
- 12–3 PM67%(70 flights)
Jun 91% → May 90% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 91% | 35 |
| July 2025 | 97% | 31 |
| August 2025 | 85% | 27 |
| September 2025 | 89% | 26 |
| October 2025 | 89% | 27 |
| November 2025 | 76% | 25 |
| December 2025 | 66% | 38 |
| January 2026 | 67% | 52 |
| February 2026 | 87% | 45 |
| March 2026 | 83% | 12 |
| April 2026 | 88% | 17 |
| May 2026 | 90% | 31 |
- Departures on time
- 85%
- Diverted
- 0.5%
- Flights flown
- 366
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 370 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.