$134 Find Cheap Flights from St. Louis to Boston - Compare and Save

BOS airport has Mamava Suites and nursing rooms dedicated to traveling mothers. You can change your baby's diaper in the nursing rooms beside each restroom of Terminal A. Mothers looking for private spaces to feed their babies or pump breasts can check out Mamava Suites inside Terminal B.

BOS airport hosts multiple food stations, cafés, and restaurants inside each terminal. Visit Berkshire Farms Market in Terminal A if you need lunch or breakfast. This restaurant offers vegan and vegetarian dishes. Those in a hurry can pass by Green Express in Terminal C for grab-and-go service. For snacks, check out Dunkin' on the Arrivals of Terminal C.

Yes. STL airport has a religious facility called St. Louis Interfaith Chapel. If you need a private and quiet space at the airport to meditate, pray, or conduct a mass, go to the interfaith chapel. Scheduled Muslim prayers, Protestant services and Catholic mass are available here daily. It is located near E33 on the airside of Terminal 2.

STL airport has pet relief areas where you can take your furry friend to stretch and hydrate before the flight. There are outdoor pet relief areas outside Terminal 1 next to exit 6 and next to exit 15 of Terminal 2. If you prefer indoor relief areas go to Concourses A and C of T1 or Concourse E of T2.

Among airlines operating St. Louis to Boston 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.

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

• Southwest
• American Airlines

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

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 travelers should check the fare details before booking.

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

• Economy Class
• First Class

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $271 round-trip via Atlanta Hartsfield-Jackson (ATL), compared to $486 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.

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

• Atlanta Hartsfield-Jackson (ATL) - 34% of one-stop connections
• Chicago O'Hare Intl (ORD) - 24% of one-stop connections
• Detroit Metropolitan Wayne County (DTW) - 12% of one-stop connections
• Orlando (MCO) - 10% of one-stop connections

Atlanta Hartsfield-Jackson (ATL) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 23% on the St. Louis to Boston route. Wednesday is the cheapest departure day at $429 round-trip on average, while Sunday is the most expensive at $553, a difference of $124. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

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

Some of the most popular sights in Boston are Fenway Park, TD Garden and South Station. These are among the most viewed places in Boston on KAYAK.

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

• Earliest: departs at 5:00 am and lands at 7:38 am
• Latest: departs at 9:05 pm and lands at 11:43 pm.

The flight takes about 2h 38m.

Last-minute fares on this route - booked within 2 weeks of departure - run 52% above the route average of $480. Book 6 weeks before departure for the lowest fares.

A nonstop flight from St. Louis to Boston takes 2h 38m, 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.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $319 to $1,793. That means the highest observed fare was about 6x higher than the lowest one.

One-way fares from St. Louis to Boston are currently lower than usual. Average one-way flight prices are about $146, which is 49% below the typical average for this route.

Flying via Washington, D.C. Reagan-National (DCA) gives the shortest average 1-stop total travel time at 4h 49m, compared with 5h 01m via New York LaGuardia (LGA) and 5h 05m via Philadelphia (PHL).

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

Boston Logan Intl Airport (BOS) hosts 5 major car rental companies, with daily rates starting from around $23 for economy cars. Top options include:
• Dollar
• Hertz
• Budget
• Thrifty
• Sixt

Round-trip flights from St. Louis to Boston range from $399 to $592, with an average of $480 over the past 12 months. Anything below $399 counts as a good deal.

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

• • American Airlines
• • JetBlue