Flight DL1238
Delta Air Lines flight DL1238
Looking for DL1238 in the air…
Portland (PDX) to Salt Lake City (SLC)
Historically, this flight arrives 15+ minutes late 11% of the time, and when it is late the delay averages 130 minutes. It was cancelled 5.4% of the time.
- On-time arrivals
- 89.3%
- Less than 15 minutes late
- Cancelled
- 5.4%
- Of scheduled flights
- Average delay when late
- 130 min
- Flights arriving 15+ minutes late
- Flights tracked
- 148
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 61%
- Airline (crew, maintenance, cleaning) 38%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Salt Lake City (SLC) to Portland (PDX)
Historically, this flight arrives 15+ minutes late 17% of the time, and when it is late the delay averages 74 minutes. It was cancelled 5.4% of the time.
- On-time arrivals
- 82.9%
- Less than 15 minutes late
- Cancelled
- 5.4%
- Of scheduled flights
- Average delay when late
- 74 min
- Flights arriving 15+ minutes late
- Flights tracked
- 148
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 52%
- Late-arriving aircraft 39%
- Air traffic control & airport 7%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Boston (BOS) to Minneapolis (MSP)
Historically, this flight arrives 15+ minutes late 9% of the time, and when it is late the delay averages 57 minutes. It was cancelled 0.0% of the time.
- On-time arrivals
- 90.7%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 57 min
- Flights arriving 15+ minutes late
- Flights tracked
- 108
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 58%
- Airline (crew, maintenance, cleaning) 42%
- Late-arriving aircraft 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Chattanooga (CHA) to Atlanta (ATL)
Historically, this flight arrives 15+ minutes late 7% of the time, and when it is late the delay averages 144 minutes. It was cancelled 3.3% of the time.
- On-time arrivals
- 93.1%
- Less than 15 minutes late
- Cancelled
- 3.3%
- Of scheduled flights
- Average delay when late
- 144 min
- Flights arriving 15+ minutes late
- Flights tracked
- 30
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 92%
- Late-arriving aircraft 8%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Seattle (SEA) to Salt Lake City (SLC)
Only 5 flights on record, which is too few for reliable odds.
- On-time arrivals
- 80.0%
- Less than 15 minutes late
- Cancelled
- 0.0%
- Of scheduled flights
- Average delay when late
- 59 min
- Flights arriving 15+ minutes late
- Flights tracked
- 5
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 100%
- Late-arriving aircraft 0%
- Air traffic control & airport 0%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
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Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 93.3% | 30 |
| October 2025 | 93.3% | 30 |
| November 2025 | 89.7% | 29 |
| December 2025 | 78.8% | 37 |
| January 2026 | 84.6% | 27 |
| February 2026 | 92.3% | 13 |
| March 2026 | 89.7% | 43 |
| April 2026 | 98.1% | 52 |
| May 2026 | 89.6% | 50 |
| June 2026 | 88.6% | 46 |
| July 2026 | 84.1% | 48 |
| August 2026 | 67.6% | 34 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data