DL1521 Delta Air Lines - Flight Status

Codeshare Flights
The flight KE3141 from Korean Air (KE) is a codeshare flight operated by Delta Air Lines (DL) under the flight number DL1521. Check this page for details about flight DL1521.

Below, you can find details about Delta Air Lines flight DL1521, which currently operates between the airports of Las Vegas - Las Vegas Harry Reid International Airport (Airport Code LAS) and Seattle - Seattle-Tacoma International Airport (Airport Code SEA).
This flight data pertains specifically to the flight's details for Thursday, March 12, 2026.

DL1521 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

DL1521 Delta Air Lines to Seattle

Scheduled - On-time
Flight Status for Thursday March 12, 2026
This flight was also scheduled for Yesterday (March 11, 2026). See it here
This flight is also scheduled for Tomorrow (March 13, 2026). See it here

Airline information

Delta Air Lines
Delta Air Lines
Equipment: Boeing 737-900 Passenger (Scimitar Winglets)

Departure

Las Vegas (LAS)
March 12, 2026
Las Vegas Harry Reid International Airport
Estimated Departure Time:
06:59 pm
Terminal:
1
Gate:
D41
Scheduled Departure Time: 06:59 pm

Arrival

Seattle (SEA)
March 12, 2026
Seattle-Tacoma International Airport
Estimated Arrival Time:
09:36 pm
Terminal:
A
Gate:
A2
Scheduled Arrival Time: 09:46 pm
Baggage: 4
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.las-vegas-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:

- AM4347 - Aeromexico

- KE3141 - Korean Air

Additional Information

Which is the frequency of flight DL1521?
The flight DL1521 is scheduled to flight on Monday, Tuesday, Wednesday, Thursday, Sunday on a weekly basis.

Which is the distance of flight DL1521?
The distance between the two airports is 867 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 Las Vegas and Seattle:

Alaska Airlines
- Flight Number: AS273. (On Time performance: 100 - Average Delay: 1 minutes)
- Flight Number: AS479. (On Time performance: 85 - Average Delay: 6 minutes)
- Flight Number: AS552. (On Time performance: 89 - Average Delay: 7 minutes)
- Flight Number: AS599. (On Time performance: 88 - Average Delay: 9 minutes)
- Flight Number: AS629. (On Time performance: 87 - Average Delay: 10 minutes)
- Flight Number: AS676. (On Time performance: 91 - Average Delay: 8 minutes)
- Flight Number: AS701. (On Time performance: 95 - Average Delay: 4 minutes)
- Flight Number: AS735. (On Time performance: 93 - Average Delay: 3 minutes)

Delta Air Lines
- Flight Number: DL1257. (On Time performance: 92 - Average Delay: 13 minutes)
- Flight Number: DL1591. (On Time performance: 88 - Average Delay: 21 minutes)
- Flight Number: DL2844. (On Time performance: 98 - Average Delay: 0 minutes)
- Flight Number: DL2880. (On Time performance: 84 - Average Delay: 9 minutes)
- Flight Number: DL2905. (On Time performance: 95 - Average Delay: 2 minutes)
- Flight Number: DL2922. (On Time performance: 89 - Average Delay: 27 minutes)

Frontier Airlines
- Flight Number: F92407. (On Time performance: 83 - Average Delay: 14 minutes)
- Flight Number: F94667. (On Time performance: 95 - Average Delay: 2 minutes)

Southwest Airlines
- Flight Number: WN1346.
- Flight Number: WN1866. (On Time performance: 85 - Average Delay: 21 minutes)
- Flight Number: WN2076. (On Time performance: 92 - Average Delay: 5 minutes)
- Flight Number: WN2244. (On Time performance: 88 - Average Delay: 18 minutes)
- Flight Number: WN2312. (On Time performance: 87 - Average Delay: 94 minutes)
- Flight Number: WN2580. (On Time performance: 100 - Average Delay: 2 minutes)
- Flight Number: WN943. (On Time performance: 75 - Average Delay: 11 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 DL1521

Date
Departure
Arrival
Duration
Aircraft
Status
Wednesday
11 March
07:09 pm
Las Vegas (LAS)
10:01 pm
Seattle (SEA)
02h 52min
Boeing 737-900
Boeing 737-900
Landed - Delayed
Tuesday
10 March
07:04 pm
Las Vegas (LAS)
09:42 pm
Seattle (SEA)
02h 38min
Boeing 737-900
Boeing 737-900
Landed - On-time
Monday
09 March
07:18 pm
Las Vegas (LAS)
10:15 pm
Seattle (SEA)
02h 57min
Boeing 737-900
Boeing 737-900
Landed - Delayed
Sunday
08 March
07:00 pm
Las Vegas (LAS)
09:31 pm
Seattle (SEA)
02h 31min
Boeing 737-900
Boeing 737-900
Landed - On-time