Near Miss LAX to YVR Oct 23

Hey Folks! New here, regular flier. I want to look something up but have no idea.

On Oct 23, I was on flight ACC551 LA to YVR. I was sitting in seat 18F. My partner was beside me, 18E, so she knows I am not insane.

At 7:19am local time, I was looking out the window for the sunrise, when I noticed a smaller, what I thought was a jet plane in the distance. That distance closed REAL quick when the plane whipped by us…closer than I’ve seen a plane in the air before. I’d love to know how close the data says the other plane was when it passed.

Apologies if this isn’t the right place to post, but figured y’all would be able to cross reference the flights pretty easily…

https://adsb.lol/?icao=c05004&lat=34.403&lon=-118.990&zoom=8.9&showTrace=2025-10-23&leg=2&trackLabels

This is your flight.

This is a replay:

https://adsb.lol/?replay=2025-10-23-15:17&lat=48.019&lon=-122.261&zoom=10.0&replaySpeed=10x

Separation was about 5 nmi which is fine i believe.

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I walked through the flight track to 7:18 when the flight was over NorCal. There was SWA2863 on a SW heading where the paths look to cross. ACA551 was at 40,000ft and SWA2863 was at 39,000ft. A vertical separation of 1,000 feet is normal.