WN 3991 San Diego to Seattle Flight Status

Southwest Airlines Flight WN3991 from San Diego International Airport SAN to Seattle Tacoma International Airport SEA is not scheduled for today June 4th, 2026.
The last time the flight was scheduled was on May 24th, 2026.
Check the table below for WN3991's most recent flight history:

WN 3991 Flight Status & Schedule

Date Departure Arrival Status
May 24 16:09 18:32
Landed
Track >

Southwest Airlines WN 3991 San Diego to Seattle Flight Information

Southwest Airlines Flight WN3991 connects San Diego, United States to Seattle, United States, taking off from San Diego International Airport SAN and landing at Seattle Tacoma International Airport SEA.

How long is the WN3991 flight from San Diego to Seattle?

The average flight time from San Diego to Seattle is 2 hours and 23 minutes. The flight distance is 1692 km / 1051 miles and the average flight speed is 710 km/h / 441 mph.

What is the On-Time Performance (OTP) of Southwest Airlines Flight WN3991 San Diego to Seattle?

The Airportia On-Time Performance Rating for Southwest Airlines Flight WN3991 is 5/5 stars. This metric is calculated using data from the past 10 flights.

When was the latest WN3991 flight?

The latest flight took off on Monday, May 25th, 2026 with the flight status being Landed on 18:32.

How else can the flight WN3991 be referenced as?

This Southwest Airlines flight can also be referenced as SWA3991, WN 3991, SWA 3991.

How often is flight WN3991 delayed?

On average, 0% of all WN3991 flights are delayed. The average delay is 0 minutes.

Can I get compensation for my delayed or cancelled WN3991 flight or baggage issues?

If your WN3991 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 WN3991 Flight Tracker above for more details.

WN3991 and San Diego SAN to Seattle SEA Flights

Other flights departing from San Diego SAN: AS622, AS2027, AS1339, WN998

Other flights arriving at Seattle SEA: AS280, AS698, AS226, AS1391

All flights connecting San Diego SAN to Seattle SEA.

WN3991 Southwest Airlines Flight: San Diego to Seattle Route Map

Flight Delay Compensation up to 600€/$: Claim for delay, cancellation, or baggage issues >
Flight-schedule data supplied by Aviation Edge Real-time Flight Schedules API.