What time do the EY flights at SFO and LAX arrive? Just doing some out loud thinking... You might just book a refundable hotel at LAX/SFO, then book a flexible o/w on it's own ticket from there to SEA for the next day. If you get in early enough you could cancel the hotel and change the flight to an available same day flight. Typical full fare from LAX or SFO to SEA is about US$350 in coach if that's within your budget. Time enroute SFO-SEA is about 1h30m and LAX-SEA is about 2h15m.