$65 Find Cheap Flights from Baltimore to St. Louis - Compare and Save

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

• Earliest: departs at 6:10 am and lands at 8:34 am
• Latest: departs at 10:55 pm and lands at 1:19 am.

The flight takes about 2h 24m.

Only Economy Class is available on flights from Baltimore to St. Louis.

A nonstop flight from Baltimore to St. Louis takes 2h 24m, covering 736 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 Baltimore to St. Louis range from $355 to $521, with an average of $425 over the past 12 months. Anything below $355 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 21% above the $425 route average. Book 17 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $244 round-trip via Atlanta Hartsfield-Jackson (ATL), compared to $463 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $45–$90 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Boeing 737 MAX 8 family is used most often on this route, operated mainly by Southwest and United Airlines. Other aircraft seen on the route include Boeing 737-800 Passenger/BBJ2 (winglets) variants.

Morning is the busiest departure period on Baltimore to St. Louis flights, with 34% of flights leaving in that window. Afternoon departures account for 33%, evening flights for 33%, and night flights for 0%.

One-way fares from Baltimore to St. Louis are currently lower than usual. Average one-way flight prices are about $139, which is 31% below the typical average for this route.

Lambert-St Louis Airport (STL) hosts 5 major car rental companies, with daily rates averaging $78 for economy cars. Top options include:

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

Flights from Baltimore to St. Louis usually depart from Baltimore/Washington (BWI) and arrive at Lambert-St Louis (STL).

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

• Atlanta Hartsfield-Jackson (ATL) - 34% of one-stop connections
• Charlotte Douglas (CLT) - 26% of one-stop connections
• Chicago O'Hare Intl (ORD) - 17% of one-stop connections
• Detroit Metropolitan Wayne County (DTW) - 15% of one-stop connections

Yes. Flexible dates can save you up to 28% on flights from Baltimore to St. Louis. Wednesday is the cheapest departure day at $367 round-trip on average, while Monday is the most expensive at $508, a difference of $141.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Only Southwest operates flights between Baltimore and St. Louis.

Flying via Detroit Metropolitan Wayne County (DTW) gives the shortest average 1-stop total travel time at 4h 13m, compared with 4h 42m via Charlotte Douglas (CLT) and 4h 48m via Nashville Intl (BNA).

St. Louis is 1 hour behind Baltimore (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 Baltimore to St. Louis flights:

• Southwest: 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
• 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.