The cheapest times to fly from BOS to STL are
- January 1st to March 4th
- August 13th to November 18th (except the week of October 8th)
- December 3rd to December 16th
based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from BOS to STL is late January. Prices can be as high as $887 for Sunday flights during late July, or as low as $182 for Tuesday flights around late January.
When to Fly to St. Louis
Flying from Boston, MA (BOS) to St. Louis, MO (STL) will usually cost between $182 to $455 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January with an average ticket price of $182. Due to high demand the most expensive time to fly is late July, with an average price of $441. Planning your trip to low-cost times can easily save you $259 on economy flights and even more on first-class flights. Generally, any price below $244 can be considered a good price for a round-trip BOS to STL flight.
See below for a graph of average weekly prices for the BOS to STL route. All prices are for round-trip tickets in USD.
Compared to other flights, the BOS to STL flight is much cheaper than the average and costs much less than the average flight leaving from Boston. The average price per mile (for a direct flight) is $0.15, which is far below average.
Flight Prices by Day of the Week
Tuesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $120 (37%) on this flight.
Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $205. Return trip prices are from the STL to BOS flight, and often highlight the quality of our data in showing the same trend.
Departing Prices by Day
Return Trip Prices by Day
Nonstop Flights and Layovers
Travelers looking to fly from BOS to STL can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 2 hour 52 minutes may be realistic.
Flight Questions Answered
Still have questions about flying from BOS to STL? We’ve got answers.
Which airlines fly this route?
You can find 8 major airlines flying this route most often: Alaska, American, Delta, Frontier, Qantas, Southwest, Sun Country Airlines, United, and potentially more during busy seasons.
How far away is it from St Louis Lambert International Airport to Logan International Airport?
The distance between the two airports is roughly 1044 miles or 1680 kilometers.
How long does it take to fly from BOS to STL?
The real-world flight time for a nonstop BOS to STL flight is about 2 hour 52 minutes.
How many flights go between Boston, MA and St. Louis, MO?
It depends on the day of the week and the date, but a typical day might have around 71 available flights from BOS to STL.
Airport Location Info
|Origination airport name||Logan International Airport|
|Country||the United States|
|Destination airport name||St Louis Lambert International Airport|
|City||St. Louis, MO|
|Country||the United States|
Late and Early Flight Data
Flights from BOS to STL tend to depart later than the average flight. According to our recently updated data, 31% of flights departed 5 or more minutes late, and 7% of flights left 5 or more minutes early. On average you can expect to leave STL heading for BOS about 22 minutes late. This does significantly impact arrival time, as the average landing time in St. Louis, MO is about 7 minutes late. The numbers below show a recent average of take-off times versus the scheduled departure flight:
- Southwest: 22 minutes late
- Some airlines not reporting
Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.