| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jul 19 | DEN | SEA | 21:51 | 23:11 |
En-Route
|
Track > |
| Jul 18 | DEN | SEA | 22:51 | 00:07 |
Landed
|
Track > |
| Jul 17 | DEN | SEA | 22:34 | 23:47 |
Landed Late
|
Track > |
| Jul 16 | DEN | SEA | 22:25 | 23:54 |
Landed Late
|
Track > |
| Jul 15 | DEN | SEA | 21:51 | 23:05 |
Landed
|
Track > |
| Jul 14 | DEN | SEA | 21:50 | 22:59 |
Landed
|
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| Jul 13 | DEN | SEA | 21:41 | 22:53 |
Landed
|
Track > |
| Jul 12 | DEN | SEA | 21:34 | 22:47 |
Landed
|
Track > |
| Jul 11 | DEN | SEA | 23:32 | 00:52 |
Landed Late
|
Track > |
| Jul 10 | DEN | SEA | 23:28 | 00:47 |
Delayed
|
Track > |
Southwest Airlines Flight WN3856 connects Denver, United States to Seattle, United States, taking off from Denver International Airport DEN and landing at Seattle Tacoma International Airport SEA.
How long is the WN3856 flight from Denver to Seattle?
The average flight time from Denver to Seattle is 2 hours and 16 minutes. The flight distance is 1645 km / 1022 miles and the average flight speed is 724 km/h / 450 mph.
How many WN3856 flights are operated per week?
7 flights per week. The flight WN3856 is operated on Monday, Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday.
What is the On-Time Performance (OTP) of Southwest Airlines Flight WN3856 Denver to Seattle?
The Airportia On-Time Performance Rating for Southwest Airlines Flight WN3856 is 4.6/5 stars. This metric is calculated using data from the past 10 flights.
When was the latest WN3856 flight?
The latest flight took off on Monday, July 20th, 2026 with the flight status being En-Route on 23:11.
How else can the flight WN3856 be referenced as?
This Southwest Airlines flight can also be referenced as SWA3856, WN 3856, SWA 3856.
How often is flight WN3856 delayed?
On average, 50% of all WN3856 flights are delayed. The average delay is 43 minutes.
Can I get compensation for my delayed or cancelled WN3856 flight or baggage issues?
If your WN3856 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 WN3856 Flight Tracker above for more details.
Other flights departing from Denver DEN: UA4650, WN1265, WN1704, WN4440
Other flights arriving at Seattle SEA: AS493, UA2651, UA1007, DL3991
All flights connecting Denver DEN to Seattle SEA.