| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Aug 03 | DEN | SEA | 00:16 | 01:34 |
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| Aug 02 | DEN | SEA | 21:27 | 22:54 |
Landed
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| Aug 01 | DEN | SEA | 00:10 | 01:38 |
Delayed
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| Jul 31 | DEN | SEA | 22:22 | 23:49 |
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| Jul 30 | DEN | SEA | 21:45 | 23:03 |
Landed
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| Jul 29 | DEN | SEA | 23:56 | 01:14 |
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| Jul 28 | DEN | SEA | 23:39 | 00:51 |
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| Jul 27 | DEN | SEA | 22:55 | 00:17 |
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| Jul 26 | DEN | SEA | 21:30 | 22:51 |
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| Jul 25 | DEN | SEA | 22:20 | 23:44 |
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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 21 minutes. The flight distance is 1645 km / 1022 miles and the average flight speed is 698 km/h / 434 mph.
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 4.2/5 stars. This metric is calculated using data from the past 10 flights.
When was the latest WN3856 flight?
The latest flight took off on Tuesday, August 4th, 2026 with the flight status being En-Route on 01:34.
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, 60% of all WN3856 flights are delayed. The average delay is 84 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.
Claim compensation for your flight delay or cancellation!
Flight delays happen, but that doesn’t mean you have to accept them. You may be entitled to as much as 600€ in compensation if your flight has been delayed, cancelled or overbooked within the last three years. Claim Compensation Now >
Other flights departing from Denver DEN: UA1253, WN1684, WN3110, UA4650
Other flights arriving at Seattle SEA: AA3259, UA2820, AS7098, WN3082
All flights connecting Denver DEN to Seattle SEA.