ASA4 is operated by ALASKA AIRLINES INC. between Seattle Tacoma International Airport (KSEA) and Ronald Reagan Washington National Airport (KDCA). The flight is most often flown by a BOEING Boeing 737-800. Typical block time is 4h 40m. SkyMeter has observed 90 legs of this flight number via ADS-B.

✈
FLIGHTS
90
last 90 days
⏱
AVG DURATION
4h 40m
tracked time
📅
SERVICE PERIOD
5/27/2025 → 9/4/2026
first → last seen
🗺
ROUTES / TYPES
8 / 3
city pairs · airframes
⚠
INCIDENT RATE
5.6%
5 flagged

Routes flown

By count · last 90 days

5
KSEA → KDCA
79
avg 4h 45m · Seattle Tacoma → Ronald Reagan Washington National
KRDU → KDCA
1
avg 1h 0m · Raleigh Durham → Ronald Reagan Washington National
KSEA → KADW
1
avg 4h 36m · Seattle Tacoma → Joint Base Andrews
KSEA → KRDU
1
avg 5h 39m · Seattle Tacoma → Raleigh Durham
KSEA → KIAD
1
avg 5h 14m · Seattle Tacoma → Washington Dulles

Aircraft types

Equipment used on this number

3
B738 BOEING Boeing 737-800
65
B38M BOEING Boeing 737 MAX 8
24
B737 BOEING Boeing 737-700
1

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
5
Rejected TO
0
Stall warnings
0
Overspeeds
0
Runway excursion
0
Counts represent flights with at least one occurrence of each flag, not the total event count. See /incidents for individual events.

Recent flights

Newest 30 operations of ASA4

30
N528ASBOEING Boeing 737-800
→
9/4/2026
5h 12m
No alerts
Replay Analysis
N592ASBOEING Boeing 737-800
→
9/2/2026
5h 16m
No alerts
Replay Analysis
N809AKBOEING Boeing 737 MAX 8
→
9/1/2026
4h 43m
No alerts
Replay Analysis
N570ASBOEING Boeing 737-800
→
8/31/2026
4h 52m
No alerts
Replay Analysis
N592ASBOEING Boeing 737-800
→
8/30/2026
4h 41m
No alerts
Replay Analysis
N805AKBOEING Boeing 737 MAX 8
→
8/29/2026
4h 43m
No alerts
Replay Analysis
N592ASBOEING Boeing 737-800
→
8/28/2026
4h 41m
No alerts
Replay Analysis
N813AKBOEING Boeing 737 MAX 8
→
8/27/2026
4h 36m
△ Low approach-stability score
Replay Analysis
N564ASBOEING Boeing 737-800
→
8/26/2026
4h 56m
No alerts
Replay Analysis
N814AKBOEING Boeing 737 MAX 8
→
8/25/2026
4h 27m
No alerts
Replay Analysis
N596ASBOEING Boeing 737-800
→
8/24/2026
5h 18m
No alerts
Replay Analysis
N814AKBOEING Boeing 737 MAX 8
→
8/23/2026
4h 42m
No alerts
Replay Analysis
N564ASBOEING Boeing 737-800
→
8/22/2026
4h 42m
No alerts
Replay Analysis
N570ASBOEING Boeing 737-800
→
8/21/2026
4h 34m
No alerts
Replay Analysis
N593ASBOEING Boeing 737-800
→
8/20/2026
4h 38m
No alerts
Replay Analysis
N809AKBOEING Boeing 737 MAX 8
→
8/19/2026
3h 58m
No alerts
Replay Analysis
N581ASBOEING Boeing 737-800
→
8/18/2026
4h 36m
No alerts
Replay Analysis
N530ASBOEING Boeing 737-800
→
8/17/2026
4h 30m
No alerts
Replay Analysis
N846AKBOEING Boeing 737 MAX 8
→
8/16/2026
5h 4m
No alerts
Replay Analysis
N563ASBOEING Boeing 737-800
→
8/15/2026
4h 34m
No alerts
Replay Analysis
N813AKBOEING Boeing 737 MAX 8
→
8/14/2026
4h 41m
No alerts
Replay Analysis
N597ASBOEING Boeing 737-800
→
8/13/2026
4h 53m
No alerts
Replay Analysis
N814AKBOEING Boeing 737 MAX 8
→
8/12/2026
4h 35m
No alerts
Replay Analysis
N613ASBOEING Boeing 737-700
→
8/11/2026
1h 3m
No alerts
Replay Analysis
N523ASBOEING Boeing 737-800
→
8/11/2026
4h 48m
No alerts
Replay Analysis
N565ASBOEING Boeing 737-800
→
8/10/2026
4h 49m
No alerts
Replay Analysis
N535ASBOEING Boeing 737-800
→
8/9/2026
1h 41m
No alerts
Replay Analysis
N537ASBOEING Boeing 737-800
→
8/8/2026
4h 43m
No alerts
Replay Analysis
N813AKBOEING Boeing 737 MAX 8
→
8/7/2026
4h 42m
△ Low approach-stability score
Replay Analysis
N525ASBOEING Boeing 737-800
→
8/6/2026
4h 43m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window