Map of the St. Louis area showing the position and track of the aircraft described in the post.

🇺🇸 N281AK - Boeing 737NG 900ER/W - Alaska Airlines ASA434/AS434, San Francisco (SFO) to Washington Dulles (IAD) - 4.4 mi away @ 37100 ft, heading E at 526 mph. Spotted 5x before! [04:46:04 PM CDT] #A2D1BC #N281AK #B739 #ALASKA #ASA434 #AS434 #ADSB #ADSBbot

Map of the St. Louis area showing the position and track of the aircraft described in the post.

🇺🇸 N553AS - Boeing 737NG 890/W - Alaska Airlines ASA434/AS434, San Francisco (SFO) to Washington Dulles (IAD) - 4.3 mi away @ 34400 ft, heading E at 619 mph. Spotted 2x before! [06:46:39 PM CST] #A70AA1 #N553AS #B738 #ALASKA #ASA434 #AS434 #ADSB #ADSBbot