Informational Guide to San Francisco Airport (SFO) - NON OFFICIAL

UA5579 United Airlines - Flight Status

Codeshare Flights
The flight NZ9401 from Air New Zealand (NZ) is a codeshare flight operated by United Airlines (UA) under the flight number UA5579. Check this page for details about flight UA5579.

Below, you can find details about United Airlines flight UA5579, which currently operates between the airports of San Francisco - San Francisco International Airport (Airport Code SFO) and Seattle - Seattle-Tacoma International Airport (Airport Code SEA).
This flight data pertains specifically to the flight's details for Wednesday, February 04, 2026.

UA5579 On Time performance:
94
We have calculated the percentage of flights that arrived within 15 minutes of their scheduled time, or earlier, based on real flight data from the last 3 months. More about punctuality and delays

Flight Status

UA5579 United Airlines to Seattle

Scheduled - On-time
Flight Status for Wednesday February 04, 2026
This flight is also scheduled for Today (February 03, 2026). See it here

Airline information

United Airlines
United Airlines
Equipment: Embraer 175 (Enhanced Winglets)

Departure

San Francisco (SFO)
February 04, 2026
San Francisco International Airport
Estimated Departure Time:
10:35 pm
Terminal:
3
Gate:
-
Scheduled Departure Time: 10:35 pm

Arrival

Seattle (SEA)
February 05, 2026
Seattle-Tacoma International Airport
Estimated Arrival Time:
12:59 am
Terminal:
-
Gate:
B7A
Scheduled Arrival Time: 12:59 am
Baggage: 3
Disclaimer
The information displayed on this website is gathered from third-party providers with a wide reputation on the sector, which in turn obtain the information from the airlines. This data is provided only for informative purposes. www.airport-sfo.com assumes no responsibility for loss or damage as a result of relying on information posted here. Please contact your airline to verify flight status.

Codeshare Flights

This flight is shared with other airlines, this means that these other flights are the same:

- NZ9401 - Air New Zealand

- VA8287 - Virgin Australia

Additional Information

Which is the frequency of flight UA5579?
The flight UA5579 is scheduled to flight on Monday, Tuesday, Wednesday, Thursday, Friday, Sunday on a weekly basis.

Which is the distance of flight UA5579?
The distance between the two airports is 679 miles.

Which is the flight time of flight UA5579?
The scheduled flight time gate to gate is: 02:24 hours.
The real flight time gate to gate on average is: 02:07 hours.

Are the departure airport and arrival airport at the same Time Zone?
Yes, both airports are in the same timezone.

Alternative Flights

The following airlines serves the same route between San Francisco and Seattle:

Alaska Airlines
- Flight Number: AS1327. (On Time performance: 71 - Average Delay: 15 minutes)
- Flight Number: AS1342. (On Time performance: 84 - Average Delay: 12 minutes)
- Flight Number: AS416. (On Time performance: 93 - Average Delay: 8 minutes)
- Flight Number: AS580. (On Time performance: 83 - Average Delay: 12 minutes)
- Flight Number: AS591. (On Time performance: 66 - Average Delay: 22 minutes)
- Flight Number: AS656. (On Time performance: 78 - Average Delay: 20 minutes)
- Flight Number: AS68. (On Time performance: 80 - Average Delay: 19 minutes)
- Flight Number: AS758. (On Time performance: 77 - Average Delay: 11 minutes)

Delta Air Lines
- Flight Number: DL1412. (On Time performance: 78 - Average Delay: 30 minutes)
- Flight Number: DL2721. (On Time performance: 93 - Average Delay: 12 minutes)
- Flight Number: DL3707. (On Time performance: 79 - Average Delay: 13 minutes)
- Flight Number: DL3991. (On Time performance: 72 - Average Delay: 11 minutes)
- Flight Number: DL976. (On Time performance: 88 - Average Delay: 13 minutes)

United Airlines
- Flight Number: UA1008. (On Time performance: 82 - Average Delay: 12 minutes)
- Flight Number: UA2019. (On Time performance: 82 - Average Delay: 17 minutes)
- Flight Number: UA2279. (On Time performance: 79 - Average Delay: 24 minutes)
- Flight Number: UA2340. (On Time performance: 86 - Average Delay: 7 minutes)
- Flight Number: UA292.

Punctuality and delays

We have gathered data from recent months and present below an analysis of how timely the flights have been.

In terms of On-Time Performance, by analyzing the flight data from the last three months, spanning from January 06, 2026 to January 29, 2026, we have obtained these figures.
Total number of flights: 17
On Time: 16 ( 94 % )
Moderate Delay: 0 ( 0 % )
Significant Delay: 0 ( 0 % )
Major Delay: 1 ( 6 % )
Canceled: 0 ( 0 % )
Diverted: 0 ( 0 % )

Average Delay: 8 minutes.
Delays analyzed by Weekday: We have gathered available data from last six months, spanning from January 06, 2026 to January 29, 2026. Next, you can observe the results broken down by day of the week: number of flights analyzed, on-time performance per day, and average delay per day.

Note: We have excluded some days from the graph, since the quantity and quality of the data is not representative enough.

Delays analyzed by Month: It is not possible to calculate the On-Time Performance for this flight accurately by month due to insufficient or non-representative data, as doing so could lead to misleading conclusions

Last Past Flights UA5579

Date
Departure
Arrival
Duration
Aircraft
Status
Monday
02 February
10:32 pm
San Francisco (SFO)
12:43 am
Seattle (SEA)
02h 11min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Saturday
31 January
10:41 pm
San Francisco (SFO)
12:41 am
Seattle (SEA)
02h 00min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Friday
30 January
10:32 pm
San Francisco (SFO)
12:32 am
Seattle (SEA)
02h 00min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Wednesday
28 January
10:31 pm
San Francisco (SFO)
12:31 am
Seattle (SEA)
02h 00min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Monday
26 January
10:35 pm
San Francisco (SFO)
12:59 am
Seattle (SEA)
02h 24min
Embraer 175 (E
Embraer 175 (E
Saturday
24 January
10:36 pm
San Francisco (SFO)
01:04 am
Seattle (SEA)
02h 28min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Friday
23 January
12:42 am
San Francisco (SFO)
03:07 am
Seattle (SEA)
02h 25min
Embraer 175 (E
Embraer 175 (E
Landed - Delayed
Thursday
22 January
10:28 pm
San Francisco (SFO)
12:28 am
Seattle (SEA)
02h 00min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Wednesday
21 January
10:31 pm
San Francisco (SFO)
12:34 am
Seattle (SEA)
02h 03min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Tuesday
20 January
10:28 pm
San Francisco (SFO)
12:31 am
Seattle (SEA)
02h 03min
Embraer 175 (E
Embraer 175 (E
Landed - On-time