How to find the cheapest flight from
Boston (BOS) to Rosario (ROS)
What is the cheapest day to fly round-trip from Boston to Rosario?
Travelers have found that booking a Wednesday departure is the best way to save up to 20% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.
Related info for your journey
Useful info, stats and facts about Boston to Rosario flights.
Alternative routes for Boston to Rosario
Destination information for Rosario
Things to know before you go. Useful info for your trip from Boston to Rosario