| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Dec 19 | SLC | BOI | 22:27 | 23:24 |
Delayed
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| Dec 18 | SLC | BOI | 20:59 | 21:53 |
Landed
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| Dec 17 | SLC | BOI | 21:15 | 22:14 |
Landed
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| Dec 16 | SLC | BOI | 20:56 | 21:48 |
Landed
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| Dec 15 | SLC | BOI | 20:59 | 21:50 |
Landed
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| Dec 14 | SLC | BOI | 20:55 | 21:44 |
Landed
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| Dec 13 | SLC | BOI | 21:40 | 22:28 |
Landed
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| Dec 12 | SLC | BOI | 20:54 | 21:44 |
Landed
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| Dec 11 | SLC | BOI | 20:55 | 21:44 |
Landed
|
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| Dec 10 | SLC | BOI | 20:53 | 21:46 |
Landed
|
Track > |
Delta Air Lines Flight DL4021 connects Salt Lake City, United States to Boise, United States, taking off from Salt Lake City International Airport SLC and landing at Boise Airport BOI.
How long is the DL4021 flight from Salt Lake City to Boise?
The average flight time from Salt Lake City to Boise is 52 minutes. The flight distance is 466 km / 290 miles and the average flight speed is 538 km/h / 334 mph.
What is the On-Time Performance (OTP) of Delta Air Lines Flight DL4021 Salt Lake City to Boise?
The Airportia On-Time Performance Rating for Delta Air Lines Flight DL4021 is 4.9/5 stars. This metric is calculated using data from the past 10 flights.
When was the latest DL4021 flight?
The latest flight took off on Saturday, December 20th, 2025 with the flight status being En-Route on 23:24.
How else can the flight DL4021 be referenced as?
This Delta Air Lines flight can also be referenced as DAL4021, DL 4021, DAL 4021.
How often is flight DL4021 delayed?
On average, 20% of all DL4021 flights are delayed. The average delay is 38 minutes.
Can I get compensation for my delayed or cancelled DL4021 flight or baggage issues?
If your DL4021 flight was cancelled, delayed, or if you experienced baggage issues such as delayed, damaged, or lost bags, you may be entitled to compensation. Compensation amounts and eligibility depend on various regulations, including EC 261/2004, UK261, CA Montreal Convention, US GoodWill, BR-ANAC, SA-GACA and TK-SHY.
See our DL4021 Flight Tracker above for more details.
Flight DL4021 is code-shared by 2 airlines using the flight numbers AM3971, LA6264
Other flights departing from Salt Lake City SLC: DL3518, DL3540, DL3542, WN3276
Other flights arriving at Boise BOI: AA6277, DL3504, G478, WN3125
All flights connecting Salt Lake City SLC to Boise BOI.
