OP, do bear in mind that options for Thanksgiving are shutting down quickly, as a lot of the remaining good fares have 28-day reservation restrictions. I grabbed my own GOT-LAX, SAN-MXP flight this morning for $2100, and since I live in London I managed to get overnight connections in LHR to let me go home and collect/deposit luggage. 580TP is bad either.

Having said that, here's a Seattle option starting in Budapest and ending in Prague (PRG, MXP, BUD, OTP are my favourite Central European airports for this type of fare)

Trip 1:
Thu, Nov 23

7:35am - 4:20pm
American Airlines
17h 45m
BUD - SEA
1 stop
4h 55m in LHR
American Airlines 6600 and 6128 operated by British Airways


Trip 2:
Wed, Nov 29

6:20pm - 5:45pm +1
Flight spans 1 day
American Airlines
14h 25m
SEA - PRG
1 stop
2h 55m in LHR
American Airlines 6127 and 6635 operated by British Airways

$2,409.36