Informational Guide to Seattle–Tacoma Airport - Seatac (SEA) - NON OFFICIAL

AS304 Alaska Airlines - Flight Status

Below, you can find details about Alaska Airlines flight AS304, which currently operates between the airports of Seattle - Seattle-Tacoma International Airport (Airport Code SEA) and Miami - Miami International Airport (Airport Code MIA).
This flight data pertains specifically to the flight's details for Sunday, January 04, 2026.

AS304 On Time performance:
79
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

AS304 Alaska Airlines to Miami

Landed - On-time
Delay: 13 minutes
Flight Status for Sunday January 04, 2026
This flight was also scheduled for Yesterday (January 03, 2026). See it here
This flight is also scheduled for Tomorrow (January 05, 2026). See it here

Airline information

Alaska Airlines
Alaska Airlines
Equipment: Boeing 737-900 (winglets) Passenger/BBJ3

Departure

Seattle (SEA)
January 04, 2026
Seattle-Tacoma International Airport
Departed at:
08:13 am
Gate:
D5
Scheduled Departure Time: 08:16 am

Arrival

Miami (MIA)
January 04, 2026
Miami International Airport
Arrived at:
05:24 pm
Terminal:
C
Gate:
E6
Scheduled Arrival Time: 05:11 pm
Baggage: 13
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.seattle-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:

- HA6785 - Hawaiian Airlines

- TN2393 - Air Tahiti Nui

Additional Information

Which is the frequency of flight AS304?
The flight AS304 is scheduled to flight on daily basis.

Which is the distance of flight AS304?
The distance between the two airports is 2722 miles.

Which is the flight time of flight AS304?
The scheduled flight time gate to gate is: 05:55 hours.
The real flight time gate to gate on average is: 05:36 hours.

Are the departure airport and arrival airport at the same Time Zone?
No, each airport is in a different timezone. The times shown above, are presented in the local time of each respective airport.
Current Time in Seattle: 2026-01-04 17:55:39
Current Time in Miami: 2026-01-04 20:55:39

Alternative Flights

The following airlines serves the same route between Seattle and Miami:

American Airlines
- Flight Number: AA2142. (On Time performance: 79 - Average Delay: 3 minutes)
- Flight Number: AA3306. (On Time performance: 82 - Average Delay: 10 minutes)

Alaska Airlines
- Flight Number: AS305. (On Time performance: 74 - Average Delay: 15 minutes)
- Flight Number: AS792. (On Time performance: 78 - Average Delay: 14 minutes)

Delta Air Lines
- Flight Number: DL506. (On Time performance: 87 - Average Delay: 4 minutes)

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 October 03, 2025 to December 28, 2025, we have obtained these figures.
Total number of flights: 14
On Time: 11 ( 79 % )
Moderate Delay: 1 ( 7 % )
Significant Delay: 1 ( 7 % )
Major Delay: 1 ( 7 % )
Canceled: 0 ( 0 % )
Diverted: 0 ( 0 % )

Average Delay: 12 minutes.
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 December 02, 2024 to November 20, 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.

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

Last Past Flights AS304

Date
Departure
Arrival
Duration
Aircraft
Status
Saturday
03 January
08:35 am
Seattle (SEA)
05:24 pm
Miami (MIA)
05h 49min
Boeing 737MAX
Boeing 737MAX
Landed - On-time
Friday
02 January
08:16 am
Seattle (SEA)
06:07 pm
Miami (MIA)
06h 51min
Boeing 737MAX
Boeing 737MAX
Landed - Delayed
Thursday
01 January
08:21 am
Seattle (SEA)
05:12 pm
Miami (MIA)
05h 51min
Boeing 737MAX
Boeing 737MAX
Landed - On-time
Wednesday
31 December
08:09 am
Seattle (SEA)
05:28 pm
Miami (MIA)
06h 19min
Boeing 737MAX
Boeing 737MAX
Landed - Delayed
Tuesday
30 December
08:15 am
Seattle (SEA)
05:06 pm
Miami (MIA)
05h 51min
Boeing 737-900
Boeing 737-900
Landed - On-time
Monday
29 December
08:12 am
Seattle (SEA)
05:34 pm
Miami (MIA)
06h 22min
Boeing 737-900
Boeing 737-900
Landed - Delayed
Sunday
28 December
09:44 am
Seattle (SEA)
06:35 pm
Miami (MIA)
05h 51min
Boeing 737MAX
Boeing 737MAX
Landed - Delayed
Saturday
27 December
08:19 am
Seattle (SEA)
05:27 pm
Miami (MIA)
06h 08min
Boeing 737MAX
Boeing 737MAX
Landed - Delayed
Friday
26 December
08:10 am
Seattle (SEA)
05:01 pm
Miami (MIA)
05h 51min
Boeing 737MAX
Boeing 737MAX
Landed - On-time
Thursday
25 December
08:21 am
Seattle (SEA)
05:00 pm
Miami (MIA)
05h 39min
Boeing 737MAX
Boeing 737MAX
Landed - On-time