$104 Find Cheap Flights from Boston to St. Louis - Compare and Save

These are the earliest and latest flight times available from Boston to St. Louis:

• Earliest: departs at 5:00 am and lands at 8:15 am
• Latest: departs at 7:55 pm and lands at 11:10 pm.

The flight takes about 3h 15m.

Three cabin classes are available on flights from Boston to St. Louis:

• Economy Class
• Business Class
• First Class

A nonstop flight from Boston to St. Louis takes 3h 15m, covering 1,043 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

Round-trip flights from Boston to St. Louis range from $416 to $623, with an average of $507 over the past 12 months. Anything below $416 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 43% above the $507 route average. Book 11 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $255 round-trip via Orlando (MCO), compared to $513 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $45–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Embraer 175 family is used most often on this route, operated mainly by American Airlines. Other aircraft seen on the route include Boeing 737 MAX 8 variants.

Morning is the busiest departure period on Boston to St. Louis flights, with 40% of flights leaving in that window. Afternoon departures account for 40%, evening flights for 20%, and night flights for 0%.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $331 to $2,216. That means the highest observed fare was about 7x higher than the lowest one.

Two airlines offer in-flight Wi-Fi on Boston to St. Louis flights:

• American Airlines
• JetBlue

Pricing varies by airline and fare class. Some plans are included with the ticket or loyalty program; others are paid add-ons priced by flight length.

One-way fares from Boston to St. Louis are currently lower than usual. Average one-way flight prices are about $165, which is 42% below the typical average for this route.

Lambert-St Louis Airport (STL) hosts 5 major car rental companies, with daily rates starting from around $31 for economy cars. Top options include:

• Hertz
• Budget
• Alamo
• Enterprise Rent-A-Car
• Payless

Flights from Boston to St. Louis usually depart from Boston Logan Intl (BOS) and arrive at Lambert-St Louis (STL).

Night flights have the fewest delays on this route, while evening departures tend to have the most.

A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the Boston to St. Louis route, 22% of flights were delayed in the past 3 months, with delays averaging 2h 30m.

One-stop flights from Boston to St. Louis most commonly connect through:

• Atlanta Hartsfield-Jackson (ATL) - 37% of one-stop connections
• Detroit Metropolitan Wayne County (DTW) - 19% of one-stop connections
• Orlando (MCO) - 14% of one-stop connections
• Washington, D.C. Reagan-National (DCA) - 9% of one-stop connections

Yes. Flexible dates can save you up to 25% on flights from Boston to St. Louis. Saturday is the cheapest departure day at $441 round-trip on average, while Monday is the most expensive at $588, a difference of $147.

Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

2 airlines operate flights between Boston and St. Louis. The airlines offering nonstop flights on this route include:

• Southwest
• American Airlines

Flying via Detroit Metropolitan Wayne County (DTW) gives the shortest average 1-stop total travel time at 4h 59m, compared with 5h 12m via Newark (EWR) and 5h 12m via Philadelphia (PHL).

St. Louis is 1 hour behind Boston (Central Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

Some of the most popular sights in St. Louis are Busch Stadium, Enterprise Center and America's Center Convention Complex. These are among the most viewed places in St. Louis on KAYAK.

Among airlines operating Boston to St. Louis flights:

• Southwest: offers free seat selection
• American Airlines: offers extra legroom; offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Here are some options for this route, based on selected ticket types and cabin classes:

• Southwest: a cabin bag and a checked bag in Economy Class
• American Airlines: a cabin bag and a checked bag in Economy Class
• JetBlue: a cabin bag in Economy Class class

Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.

Yes. STL provides lactation suites for traveling mothers if they want some privacy while they breastfeed or if they need to pump. These lactation suites are outfitted with a comfortable chair, a table, a sink, a bench, a footrest, and an outlet that is appropriately placed for a breast pump. These clean, private suites can be found at Gates C9, E33, and A10.

Yes. The USO at BOS proudly welcomes active-duty service members of the US military and their families. The lounge is located in Terminal C, before security, on the lower level, toward Terminal E. Amenities at this lounge include comfortable seating around a TV with DVDs and Xbox games, a kitchen area, internet access, computers, emergency personal-care kits, reference materials about Boston, and so much more. This USO is open from 8 am until 9 pm Monday thru Friday and from 8 am to 8 pm on Saturday and Sunday.

STL provides travelers and staff alike with two interfaith chapels. The chapels provide prayer books, prayer rugs, and services that include empathetic listening, spiritual guidance, and religious services. Open and available 24/7, one chapel is located on the lower level of Terminal 1 and the other is at Gate E40.

American Airlines, JetBlue, and Southwest are among the airlines that operate direct flights between BOS and STL. American Airlines and Delta are among the airlines that offer flights between BOS and STL that have one-stop. Layover cities include Philadelphia (PHL), Washington DC (DCA), and Charlotte (CLT). United Airlines is one of the carriers that operate flights between STL and BOS that have two stops. Layover cities include Newark (EWR) and Chicago (ORD).