It’s generally more expensive to depart on a Monday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.
Users have found that booking a flight from Seattle to Sofia at least 45 days early can save you up to 6% on average compared to booking a flight this week. If booking 45 days before your flight isn’t an option for you, users have found flights from Seattle to Sofia for as little as $1056 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $1132 for flights departing within the next 3 days.
A simple way to save on the total cost of your ticket is to fly from Seattle to Sofia in the evening. If you’re flexible enough to do this you can expect to save up to 31% on your trip compared to booking a flight in the noon.