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

DL4451 Delta Air Lines - Flight Status

Below, you can find details about Delta Air Lines flight DL4451, which currently operates between the airports of Seattle - Seattle-Tacoma International Airport (Airport Code SEA) and San Francisco - San Francisco International Airport (Airport Code SFO).
This flight data pertains specifically to the flight's details for Thursday, February 19, 2026.

DL4451 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

DL4451 Delta Air Lines to San Francisco

Landed - On-time
Flight Status for Thursday February 19, 2026
This flight is also scheduled for Today (February 20, 2026). See it here

Airline information

Delta Air Lines
Delta Air Lines
Equipment: Embraer 175 (Enhanced Winglets)

Departure

Seattle (SEA)
February 19, 2026
Seattle-Tacoma International Airport
Departed at:
01:32 pm
Gate:
B8
Scheduled Departure Time: 01:35 pm

Arrival

San Francisco (SFO)
February 19, 2026
San Francisco International Airport
Arrived at:
03:45 pm
Terminal:
1
Gate:
C5
Scheduled Arrival Time: 03:51 pm
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:

- AF2101 - Air France

- KL6444 - KLM Royal Dutch Airlines

Additional Information

Which is the frequency of flight DL4451?
The flight DL4451 is scheduled to flight on Monday, Tuesday, Wednesday, Thursday, Friday on a weekly basis.

Which is the distance of flight DL4451?
The distance between the two airports is 679 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 Seattle and San Francisco:

Alaska Airlines
- Flight Number: AS1385. (On Time performance: 75 - Average Delay: 13 minutes)
- Flight Number: AS411. (On Time performance: 58 - Average Delay: 34 minutes)
- Flight Number: AS528. (On Time performance: 68 - Average Delay: 22 minutes)
- Flight Number: AS590. (On Time performance: 59 - Average Delay: 20 minutes)
- Flight Number: AS655. (On Time performance: 64 - Average Delay: 19 minutes)
- Flight Number: AS680. (On Time performance: 75 - Average Delay: 15 minutes)
- Flight Number: AS688. (On Time performance: 77 - Average Delay: 12 minutes)
- Flight Number: AS725. (On Time performance: 70 - Average Delay: 19 minutes)
- Flight Number: AS76. (On Time performance: 60 - Average Delay: 22 minutes)

Delta Air Lines
- Flight Number: DL1412. (On Time performance: 72 - Average Delay: 18 minutes)
- Flight Number: DL2635. (On Time performance: 80 - Average Delay: 31 minutes)
- Flight Number: DL3707. (On Time performance: 83 - Average Delay: 10 minutes)
- Flight Number: DL3991. (On Time performance: 83 - Average Delay: 9 minutes)
- Flight Number: DL976. (On Time performance: 66 - Average Delay: 16 minutes)

United Airlines
- Flight Number: UA1238. (On Time performance: 20 - Average Delay: 159 minutes)
- Flight Number: UA1372. (On Time performance: 76 - Average Delay: 32 minutes)
- Flight Number: UA1424. (On Time performance: 89 - Average Delay: 20 minutes)
- Flight Number: UA1482. (On Time performance: 85 - Average Delay: 16 minutes)
- Flight Number: UA1665. (On Time performance: 88 - Average Delay: 6 minutes)
- Flight Number: UA5676. (On Time performance: 87 - Average Delay: 6 minutes)
- Flight Number: UA611. (On Time performance: 50 - Average Delay: 25 minutes)
- Flight Number: UA662. (On Time performance: 100 - Average Delay: 1 minutes)
- Flight Number: UA737. (On Time performance: 73 - Average Delay: 28 minutes)

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: 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 DL4451

Date
Departure
Arrival
Duration
Aircraft
Status
Thursday
19 February
01:32 pm
Seattle (SEA)
03:45 pm
San Francisco (SFO)
02h 13min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Wednesday
18 February
01:25 pm
Seattle (SEA)
04:17 pm
San Francisco (SFO)
02h 52min
Embraer 175
Embraer 175
Landed - Delayed
Tuesday
17 February
01:45 pm
Seattle (SEA)
04:06 pm
San Francisco (SFO)
02h 21min
Embraer 175
Embraer 175
Landed - Delayed
Monday
16 February
01:31 pm
Seattle (SEA)
03:41 pm
San Francisco (SFO)
02h 10min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Friday
13 February
01:33 pm
Seattle (SEA)
03:46 pm
San Francisco (SFO)
02h 13min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Thursday
12 February
01:31 pm
Seattle (SEA)
03:33 pm
San Francisco (SFO)
02h 02min
Embraer 175 (E
Embraer 175 (E
Landed - On-time