Travelers have found that booking a Monday departure is the best way to save up to 47% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.
To save up to 15% on this flight, we recommend booking at least 61 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from St Louis to Sofia from $950 1-2 weeks out and tickets from $959 for flights departing within the next 72 hours.
Due to multiple factors, expect to potentially pay more when booking in June. For low rates, March can be a great choice for travel to Sofia. Flights to Sofia from St Louis in March are about $909 on average during March, but can be found for as low as $578.
When flying from St Louis to Sofia, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 37% versus a flight in the afternoon.
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