Alaska Airlines
flight
AS 4278:
Multiple routes
FLIGHT SCHEDULE
Direct Codeshare Flights:
Alaska Airlines AS4278
Operates only on 2026-01-02
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Codeshare flight, operated by American Airlines.
(AA 2814)
Duration: 2:02, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4278
Effective 2026-02-14 through 2026-03-07
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Codeshare flight, operated by American Airlines.
(AA 6214)
Duration: 2:00, non-stop Canadair CRJ 700 (CR7)
Direct Codeshare Flights:
Alaska Airlines AS4278
Effective 2026-03-09 through 2026-03-18
Mon
Tue
Wed
Thu
Fri
Sat
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Sun
Codeshare flight, operated by American Airlines.
(AA 3332)
Duration: 1:52, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4278
Effective 2026-01-08 through 2026-01-16
Mon
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Tue
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Sat
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Sun
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Codeshare flight, operated by American Airlines.
(AA 3332)
Duration: 1:58, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4278
Effective 2026-01-19 through 2026-02-09
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 American Airlines.
(AA 3332)
Duration: 1:58, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4278
Effective from 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 4165)
Duration: 1:47, non-stop Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4278
Effective 2026-05-21 through 2026-06-16
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 3661)
Duration: 1:45, non-stop Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4278
Effective 2026-06-17 through 2026-06-18
Mon
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Tue
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Wed
Thu
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Codeshare flight, operated by American Airlines.
(AA 955)
Duration: 1:45, non-stop Airbus A321 (321)
Direct Codeshare Flights:
Alaska Airlines AS4278
Effective 2026-06-19 through 2026-07-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 3661)
Duration: 1:45, non-stop Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4278
Effective 2026-04-07 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 2174)
Duration: 3:08, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4278
Effective 2026-08-05 through 2026-09-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 1211)
Duration: 3:12, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4278
Effective 2026-07-02 through 2026-08-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 1211)
Duration: 3:13, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4278
Operates only on 2026-03-31
Mon
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Wed
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Thu
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Sun
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Codeshare flight, operated by American Airlines.
(AA 3527)
Duration: 1:55, non-stop Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4278
Effective 2026-03-05 through 2026-03-06
Mon
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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 American Airlines.
(AA 3527)
Duration: 1:58, non-stop Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4278
Effective 2026-03-14 through 2026-03-28
Mon
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Tue
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Wed
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Thu
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Fri
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Sat
Sun
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Codeshare flight, operated by American Airlines.
(AA 3527)
Duration: 1:51, non-stop Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4278
Effective 2026-04-01 through 2026-04-06
Mon
Tue
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Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 3527)
Duration: 1:51, non-stop Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4278
Effective 2026-03-03 through 2026-03-04
Mon
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Tue
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 American Airlines.
(AA 3178)
Duration: 2:03, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4278
Effective 2026-02-12 through 2026-03-02
Mon
Tue
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Wed
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Thu
Fri
Sat
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Sun
Codeshare flight, operated by American Airlines.
(AA 3178)
Duration: 2:03, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4278
Valid until 2026-01-04
Mon
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Sun
Codeshare flight, operated by American Airlines.
(AA 2229)
Duration: 2:11, non-stop Boeing 737-800 (738)
Direct Codeshare Flights:
Alaska Airlines AS4278
Effective 2026-08-05 through 2026-09-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 1211)
Duration: 3:32, non-stop Boeing 737-800 (738)
This flight number is listed as serving the following routes:
- Chicago O'Hare (ORD) - Charlotte (CLT)
- Kansas City (MCI) - Dallas Fort Worth (DFW)
- Miami (MIA) - Chicago O'Hare (ORD)