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Cheap Flights from Boston to St. Louis starting at S$ 101

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • One way
  • Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Cheapest time to fly from Boston to St. Louis

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the lowest average weekly prices of the corresponding route on Trip.com.
Cheapest Airlines flying from Boston to St. Louis

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines
From S$ 101
Spirit Airlines
From S$ 113
Delta Air Lines
From S$ 123
American Airlines
From S$ 153
Jetblue Airways
From S$ 159
Sun Country Airlines
From S$ 171
United Airlines
From S$ 172
Southwest Airlines
From S$ 209
Alaska Airlines
From S$ 331
Allegiant Air
From S$ 479
ANA airlines

Find more flights and airlines

Alternative Routes from Boston to St. Louis

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from Boston to St. Louis.

  • Cheapest
    Frontier Airlines
    BOS
    08:15
    7h 27m
    1 transfer
    STL
    14:42
    General Edward Lawrence Logan International Airport - St. Louis Lambert International Airport
    Wed, Jun 5Frontier Airlines
    S$ 101
  • Frontier Airlines
    BOS
    08:15
    7h 27m
    1 transfer
    STL
    14:42
    General Edward Lawrence Logan International Airport - St. Louis Lambert International Airport
    Wed, Jun 5Frontier Airlines
    S$ 101
    Find More Flights

Frequently Asked Questions

  • When to buy flight tickets from Boston (BOS) to St. Louis (STL) the cheapest?

    Airlines adjust prices for flights from Boston to St. Louis based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.
  • How much is a flight from Boston (BOS) to St. Louis (STL) cost?

    According to Trip.com's data, the lowest price is around S$ 533.
  • How long is a flight from Boston (BOS) to St. Louis (STL)?

    It takes about 3 hours 17 minutes to fly from Boston (BOS) to St. Louis (STL).
  • What is the transportation method from the main airport to downtown in St. Louis?

    • The distance from St. Louis Lambert International Airport to downtown is about 20km, by taxi about 40 minutes.
  • What time does the earliest flight from Boston to St. Louis depart?

    The earliest flight departs from Boston (BOS) at 08:00 and arrives in St. Louis (STL) at 10:15.
  • What are the most popular airlines that fly from Boston (BOS) to St. Louis (STL)?

    Airlines with flights from Boston (BOS) to St. Louis (STL): American Airlines, Qatar Airways and Southwest Airlines.
  • What's the most popular airline for direct flights from Boston (BOS) to St. Louis (STL)?

    American Airlines operates 1 direct flights from Boston (BOS) to St. Louis (STL).
  • How many airports in St. Louis?

Find cheapest flight ticket from Boston to St. Louis

Cheapest direct flight price

S$ 100

Cheapest return ticket price

S$ 359

Cheapest month

November

Peak season for travel

September