Singapore Airlines
flight
SQ 1221:
Dallas Fort Worth - Seattle-Tacoma
Dallas Fort Worth - Seattle-Tacoma
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FLIGHT SCHEDULE
Direct Codeshare Flights:
Singapore Airlines SQ1221
Effective 2025-05-17 through 2025-06-07
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Codeshare flight, operated by Alaska Airlines.
(AS 909)
Duration: 4:27, non-stop Boeing 737 (73J)
Singapore Airlines SQ1221
Effective 2025-10-04 through 2025-11-20
Mon
Tue
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Wed
Thu
Fri
Sat
Sun
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Codeshare flight, operated by Alaska Airlines.
(AS 550)
Duration: 4:32, non-stop Boeing 737 (73J)
Singapore Airlines SQ1221
Effective 2025-06-12 through 2025-06-18
Mon
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Tue
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Wed
Thu
Fri
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Sat
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Sun
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Codeshare flight, operated by Alaska Airlines.
(AS 550)
Duration: 4:19, non-stop Boeing 737 (73J)
Singapore Airlines SQ1221
Effective 2025-06-13 through 2025-06-19
Mon
Tue
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Wed
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Thu
Fri
Sat
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Sun
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Codeshare flight, operated by Alaska Airlines.
(AS 550)
Duration: 4:19, non-stop Boeing 737 MAX 9 (7M9)
Singapore Airlines SQ1221
Effective 2025-06-20 through 2025-06-30
Mon
Tue
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Wed
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Thu
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Fri
Sat
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Sun
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Codeshare flight, operated by Alaska Airlines.
(AS 550)
Duration: 4:19, non-stop Boeing 737 (73J)
Singapore Airlines SQ1221
Effective 2025-06-25 through 2025-07-03
Mon
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Tue
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Wed
Thu
Fri
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Sat
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Sun
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Codeshare flight, operated by Alaska Airlines.
(AS 550)
Duration: 4:19, non-stop Boeing 737 MAX 9 (7M9)
Singapore Airlines SQ1221
Effective 2025-07-07 through 2025-07-18
Mon
Tue
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Wed
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Thu
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Fri
Sat
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Sun
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Codeshare flight, operated by Alaska Airlines.
(AS 550)
Duration: 4:19, non-stop Boeing 737 (73J)
Singapore Airlines SQ1221
Operates only on 2025-07-09
Mon
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Tue
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Wed
Thu
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Fri
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Sat
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Sun
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Codeshare flight, operated by Alaska Airlines.
(AS 550)
Duration: 4:19, non-stop Boeing 737 MAX 8 (7M8)
Singapore Airlines SQ1221
Effective 2025-07-10 through 2025-07-17
Mon
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Tue
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Wed
Thu
Fri
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Sat
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Sun
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Codeshare flight, operated by Alaska Airlines.
(AS 550)
Duration: 4:19, non-stop Boeing 737 MAX 9 (7M9)
Singapore Airlines SQ1221
Effective 2025-07-21 through 2025-07-24
Mon
Tue
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Wed
Thu
Fri
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Sat
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Sun
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Codeshare flight, operated by Alaska Airlines.
(AS 550)
Duration: 4:19, non-stop Boeing 737 MAX 9 (7M9)
Singapore Airlines SQ1221
Effective 2025-07-25 through 2025-08-04
Mon
Tue
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Wed
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Thu
Fri
Sat
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Sun
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Codeshare flight, operated by Alaska Airlines.
(AS 550)
Duration: 4:19, non-stop Boeing 737 (73J)
Singapore Airlines SQ1221
Effective 2025-07-30 through 2025-08-06
Mon
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Tue
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Wed
Thu
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Fri
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Sat
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Sun
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Codeshare flight, operated by Alaska Airlines.
(AS 550)
Duration: 4:19, non-stop Boeing 737 MAX 9 (7M9)
Singapore Airlines SQ1221
Effective 2025-08-07 through 2025-08-13
Mon
-
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Tue
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Wed
Thu
Fri
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Sat
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Sun
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Codeshare flight, operated by Alaska Airlines.
(AS 550)
Duration: 4:19, non-stop Boeing 737 MAX 9 (7M9)
Singapore Airlines SQ1221
Effective 2025-08-08 through 2025-08-18
Mon
Tue
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Wed
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Thu
Fri
Sat
-
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Sun
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Codeshare flight, operated by Alaska Airlines.
(AS 550)
Duration: 4:19, non-stop Boeing 737 (73J)
Singapore Airlines SQ1221
Effective 2025-08-20 through 2025-10-03
Mon
Tue
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Wed
Thu
Fri
Sat
Sun
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Codeshare flight, operated by Alaska Airlines.
(AS 550)
Duration: 4:18, non-stop Boeing 737 (73J)
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Parallax here DFW-SEA
- SQ 1221 is a domestic flight departing from the Dallas Fort Worth airport (DFW) and arriving at Seattle-Tacoma airport (SEA).
- The flight distance is 1657 miles, or 2667 km.
- The timezone of the departure airport is UTC-6 , and the timezone of the arrival airport is UTC-8 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
- For direct flights, the flight time varies between 4:18 and 4:32.