Currently, April is the cheapest month in which you can book a flight to Saint Thomas Island (average of $388). Flying to Saint Thomas Island in July will prove the most costly (average of $643). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.
January
$391
February
$433
March
$461
April
$388
May
$401
June
$641
July
$643
August
$510
September
$448
October
$433
November
$501
December
$545