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WN3999 Flight Status Southwest Airlines: Sacramento to San Diego (SWA3999)

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WN 3999 Sacramento to San Diego Flight Status

Southwest Airlines Flight WN3999 from Sacramento International Airport SMF to San Diego International Airport SAN is not scheduled for today June 3rd, 2026.
The last time the flight was scheduled was on October 1st, 2025.
Check the table below for WN3999's most recent flight history:

WN 3999 Flight Status & Schedule

Date Departure Arrival Status
Oct 01 13:10 14:20
Landed
 Track >
Sep 30 13:11 14:22
Landed
 Track >
Sep 29 13:11 14:27
Landed
 Track >
Sep 27 13:41 14:49
Landed
 Track >
Sep 26 13:21 14:29
Landed
 Track >
< All SMF Departures All SAN Arrivals >

Southwest Airlines WN 3999 Sacramento to San Diego Flight Information

Southwest Airlines Flight WN3999 connects Sacramento, United States to San Diego, United States, taking off from Sacramento International Airport SMF and landing at San Diego International Airport SAN.

How long is the WN3999 flight from Sacramento to San Diego?

The average flight time from Sacramento to San Diego is 1 hour and 11 minutes. The flight distance is 773 km / 480 miles and the average flight speed is 650 km/h / 404 mph.

What is the On-Time Performance (OTP) of Southwest Airlines Flight WN3999 Sacramento to San Diego?

The Airportia On-Time Performance Rating for Southwest Airlines Flight WN3999 is 5/5 stars. This metric is calculated using data from the past 10 flights.

Which terminal is the flight WN3999 arriving at?

Flight WN3999 arrives at San Diego International Airport (SAN) Terminal 1.

When was the latest WN3999 flight?

The latest flight took off on Wednesday, October 1st, 2025 with the flight status being Landed on 14:20.

How else can the flight WN3999 be referenced as?

This Southwest Airlines flight can also be referenced as SWA3999, WN 3999, SWA 3999.

How often is flight WN3999 delayed?

On average, 10% of all WN3999 flights are delayed. The average delay is 30 minutes.

Can I get compensation for my delayed or cancelled WN3999 flight or baggage issues?

If your WN3999 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 WN3999 Flight Tracker above for more details.

WN3999 and Sacramento SMF to San Diego SAN Flights

Other flights departing from Sacramento SMF: AS3014, WN3956, WN1905, WN1364

Other flights arriving at San Diego SAN: AA1939, AS3405, WN3303, WN1110

All flights connecting Sacramento SMF to San Diego SAN.

WN3999 Southwest Airlines Flight: Sacramento to San Diego Route Map

WN3999 Southwest Airlines Flight Map: Sacramento to San Diego
Flight Delay Compensation up to 600€/$: Claim for delay, cancellation, or baggage issues >
New Flights: MS6108 W63207 OO3465 RV1989 BI4225 YV4030 KJ5487 WR8997 BY6397 JA1150
See Also: Flight Tracker Airports Airlines News Flights Monitor Delay Compensation
Flight-schedule data supplied by Aviation Edge Real-time Flight Schedules API.