| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jan 05 | ONT | DEN | 16:23 | 18:59 |
Landed
|
Track > |
| Dec 18 | ONT | DEN | 16:28 | 19:21 |
Landed
|
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| Dec 14 | ONT | DEN | 16:20 | 19:10 |
Landed
|
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| Dec 12 | ONT | DEN | 16:43 | 19:37 |
Landed
|
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| Dec 07 | ONT | DEN | 16:32 | 19:21 |
Landed
|
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| Nov 28 | ONT | DEN | 16:40 | 19:26 |
Landed
|
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| Nov 24 | ONT | DEN | 16:35 | 19:22 |
Landed
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| Nov 23 | ONT | DEN | 16:54 | 19:47 |
Landed Late
|
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| Nov 21 | ONT | DEN | 17:14 | 20:04 |
Landed Late
|
Track > |
| Nov 16 | ONT | DEN | 16:32 | 19:42 |
Landed Late
|
Track > |
Southwest Airlines Flight WN3978 connects Ontario, United States to Denver, United States, taking off from Ontario International Airport ONT and landing at Denver International Airport DEN.
How long is the WN3978 flight from Ontario to Denver?
The average flight time from Ontario to Denver is 1 hour and 50 minutes. The flight distance is 1316 km / 818 miles and the average flight speed is 716 km/h / 445 mph.
What is the On-Time Performance (OTP) of Southwest Airlines Flight WN3978 Ontario to Denver?
The Airportia On-Time Performance Rating for Southwest Airlines Flight WN3978 is 4.8/5 stars. This metric is calculated using data from the past 10 flights.
When was the latest WN3978 flight?
The latest flight took off on Tuesday, January 6th, 2026 with the flight status being Landed on 18:59.
How else can the flight WN3978 be referenced as?
This Southwest Airlines flight can also be referenced as SWA3978, WN 3978, SWA 3978.
How often is flight WN3978 delayed?
On average, 50% of all WN3978 flights are delayed. The average delay is 18 minutes.
Can I get compensation for my delayed or cancelled WN3978 flight or baggage issues?
If your WN3978 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 WN3978 Flight Tracker above for more details.
Other flights departing from Ontario ONT: WN1242, WN4540, WN719, GB3113
Other flights arriving at Denver DEN: WN3470, WN2068, WN2068, UA5030
All flights connecting Ontario ONT to Denver DEN.