$154 Find Cheap Southwest Flights from St. Louis to Boston

When to Book Flights with Southwest from St. Louis to Boston

• How far in advance should I book tickets for a flight with Southwest from St. Louis to Boston?

  Generally, when trying to get a below average price for your ticket, try to book around 14 days before departure. For the cheapest possible price, our data suggests booking 57 days before departure.

• Is Southwest the cheapest airline to fly with from St. Louis to Boston?

  With an average price of $455 return, Southwest is not the cheapest airline to fly from St. Louis to Boston with. Instead, for the lowest price, our data suggests flying with Spirit Airlines, where a return flight costs $249 on average.

• What is the cheapest Southwest flight from St. Louis to Boston?

  In the last 3 days, the lowest price for a flight with Southwest from St. Louis to Boston was $359 for a return flight and $248 for a one-way flight.

• Does Southwest fly direct to Boston from St. Louis?

  Yes, Southwest does offer direct flights for the route, with around 4 flights per week.

• What’s the cheapest day of the week to fly from St. Louis to Boston with Southwest?

  On average, the cheapest day of the week to fly from St. Louis to Boston with Southwest is Monday, when prices are around $143. The most expensive day is generally Saturday, where the average price is around $210.

• What’s the cheapest month to fly from St. Louis to Boston with Southwest?

  The cheapest month for Southwest flights to Boston from St. Louis is generally May, where plane tickets cost $231 on average. If possible, try to avoid the most expensive months of January and April, where tickets cost $495 and $500 respectively.