298 - 720 USD
Most travelers find the cheapest round-trip airfare to St. John's when booking during the month of October.
Most flyers found that booking flight tickets 48 days in advance of their planned departure date is, on average, the best time to get cheap flights to St. John's.
In general, booking your departure to St. John's for a Saturday represents the best deal on airfare. Try to avoid a Sunday departure to stay away from the highest prices.
Typically, cheap prices to St. John's are most often found for noon flights. Cheap prices are less likely for morning flights.