Informational Guide to LAX Airport - NON OFFICIAL

UA5403 United Airlines - Flight Status

Below, you can find details about United Airlines flight UA5403, which currently operates between the airports of Los Angeles - Los Angeles International Airport (Airport Code LAX) and Seattle - Seattle-Tacoma International Airport (Airport Code SEA).
This flight data pertains specifically to the flight's details for Friday, January 09, 2026.

UA5403 On Time performance:
n/a
It is not possible to calculate the On-Time Performance for this flight accurately due to insufficient or non-representative data, as doing so could lead to misleading conclusions.

Flight Status

UA5403 United Airlines to Seattle

Landed - On-time
Flight Status for Friday January 09, 2026
This flight is also scheduled for Today (January 10, 2026). See it here
This flight is also scheduled for Tomorrow (January 11, 2026). See it here

Airline information

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

Departure

Los Angeles (LAX)
January 09, 2026
Los Angeles International Airport
Departed at:
01:10 pm
Terminal:
8
Gate:
80
Scheduled Departure Time: 01:15 pm

Arrival

Seattle (SEA)
January 09, 2026
Seattle-Tacoma International Airport
Arrived at:
03:55 pm
Terminal:
-
Gate:
B11
Scheduled Arrival Time: 04:29 pm
Baggage: 9
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.los-angeles-airport.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:

- CM2084 - Copa Airlines

Additional Information

Which is the frequency of flight UA5403?
The flight UA5403 is scheduled to flight on Tuesday, Wednesday, Thursday, Friday, Saturday on a weekly basis.

Which is the distance of flight UA5403?
The distance between the two airports is 955 miles.

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 Los Angeles and Seattle:

American Airlines
- Flight Number: AA6444. (On Time performance: 75 - Average Delay: 34 minutes)
- Flight Number: AA6481. (On Time performance: 73 - Average Delay: 39 minutes)

Alaska Airlines
- Flight Number: AS1301. (On Time performance: 95 - Average Delay: 7 minutes)
- Flight Number: AS1305. (On Time performance: 92 - Average Delay: 6 minutes)
- Flight Number: AS1309. (On Time performance: 94 - Average Delay: 2 minutes)
- Flight Number: AS504. (On Time performance: 85 - Average Delay: 6 minutes)
- Flight Number: AS532. (On Time performance: 86 - Average Delay: 8 minutes)
- Flight Number: AS585. (On Time performance: 80 - Average Delay: 15 minutes)
- Flight Number: AS614. (On Time performance: 84 - Average Delay: 9 minutes)
- Flight Number: AS698. (On Time performance: 85 - Average Delay: 6 minutes)
- Flight Number: AS717.
- Flight Number: AS722. (On Time performance: 70 - Average Delay: 28 minutes)
- Flight Number: AS748. (On Time performance: 88 - Average Delay: 6 minutes)
- Flight Number: AS798. (On Time performance: 86 - Average Delay: 6 minutes)
- Flight Number: AS84. (On Time performance: 98 - Average Delay: 1 minutes)

Cargolux
- Flight Number: CV3. (On Time performance: 33 - Average Delay: 24 minutes)

Delta Air Lines
- Flight Number: DL1045. (On Time performance: 89 - Average Delay: 12 minutes)
- Flight Number: DL1551. (On Time performance: 78 - Average Delay: 22 minutes)
- Flight Number: DL1714. (On Time performance: 92 - Average Delay: 6 minutes)
- Flight Number: DL2606. (On Time performance: 84 - Average Delay: 12 minutes)
- Flight Number: DL2640. (On Time performance: 89 - Average Delay: 8 minutes)
- Flight Number: DL2645. (On Time performance: 90 - Average Delay: 5 minutes)
- Flight Number: DL2980. (On Time performance: 97 - Average Delay: 8 minutes)

Frontier Airlines
- Flight Number: F91177. (On Time performance: 71 - Average Delay: 24 minutes)

United Airlines
- Flight Number: UA5252. (On Time performance: 95 - Average Delay: 4 minutes)
- Flight Number: UA5391. (On Time performance: 69 - Average Delay: 10 minutes)
- Flight Number: UA5572. (On Time performance: 89 - Average Delay: 11 minutes)
- Flight Number: UA5573. (On Time performance: 74 - Average Delay: 15 minutes)
- Flight Number: UA5655. (On Time performance: 92 - Average Delay: 6 minutes)
- Flight Number: UA5992.

Punctuality and delays

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

Delays analyzed by Week: It is not possible to calculate the On-Time Performance for this flight accurately by weekday due to insufficient or non-representative data, as doing so could lead to misleading conclusions
Delays analyzed by Month: We have gathered available data from last twelve closed months, spanning from January 02, 2025 to February 12, 2025. Next, you can observe the results broken down by month: number of flights analyzed, on-time performance per month, and average delay per month.

Last Past Flights UA5403

Date
Departure
Arrival
Duration
Aircraft
Status
Friday
09 January
01:10 pm
Los Angeles (LAX)
03:55 pm
Seattle (SEA)
02h 45min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Thursday
08 January
01:10 pm
Los Angeles (LAX)
04:15 pm
Seattle (SEA)
03h 05min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Wednesday
07 January
01:07 pm
Los Angeles (LAX)
03:48 pm
Seattle (SEA)
02h 41min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Tuesday
06 January
01:13 pm
Los Angeles (LAX)
04:35 pm
Seattle (SEA)
03h 22min
Embraer 175 (E
Embraer 175 (E
Landed - On-time