Menu

Cheap flights from Baltimore to St Louis (BWI - STL)

Know your dates, get live prices in seconds:

From
To
Depart
Return
Any month
Compare vs. Cheapflights |
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime
From
To
Depart
Depart
Time
Anytime

We work with more than 300 partners to bring you better travel deals

The best prices from Baltimore to St Louis are usually found in August or May, booked 30 days in advance, depart on a Saturday or Tuesday and return on a Tuesday

How to find the cheapest flight from
Baltimore (BWI) to St Louis (STL)

BWI - STL
Price
$172 - $344
STL
Temperature
44.6 - 89.6 °F
STL
Rainfall
2.2 - 5.1 inches

Popular in

November

High demand for flights, 18% potential price rise

Cheapest in

August

Best time to find cheap flights, 39% potential price drop

Round-trip from

$172

From Baltimore to St Louis

One-way from

$77

One-way flight from Baltimore to St Louis

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Baltimore to St Louis?

Departing on a Friday is a good option for securing a great price. You can expect to save up to 63% when planning your travel around this day of the week.

How far in advance should I book a flight from Baltimore to St Louis?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 31 days in advance, which can save you up to 96% on flights from Baltimore to St Louis compared to booking the week you need them. Waiting 31 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $374. For sooner than that we have options available in the next 3 days from $553.

What is the cheapest month to fly from Baltimore to St Louis?

August can be a great time to fly to St Louis from Baltimore with a flight ticket averaging about $266. Cheapflights users have found deals in the month of August for as cheap as $158. The most expensive prices can be found in the month of December.

When is the cheapest time to fly from Baltimore to St Louis (BWI - STL)?

A simple way to save on the total cost of your ticket is to fly from Baltimore to St Louis in the afternoon. If you’re flexible enough to do this you can expect to save up to 12% on your trip compared to booking a flight at noon.

Cheap flights from Baltimore to St Louis in December, January 2021

The best prices found for BWI to STL flights for December, January
13 Dec - 19 Dec
$79pp
BWI
Baltimore/Washington
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
BWI
Baltimore/Washington
8 Jan - 10 Jan
$96pp
BWI
Baltimore/Washington
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
BWI
Baltimore/Washington
25 Dec - 2 Jan
$114pp
BWI
Baltimore/Washington
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
BWI
Baltimore/Washington

Baltimore to St Louis 2021 flight deals

Cheap flights to St Louis from Baltimore found for this year
13 Dec - 19 Dec
$79pp
BWI
Baltimore/Washington
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
BWI
Baltimore/Washington
25 Dec - 2 Jan
$114pp
BWI
Baltimore/Washington
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
BWI
Baltimore/Washington
13 Dec - 19 Dec
$128pp
BWI
Baltimore/Washington
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
BWI
Baltimore/Washington

Last minute flights from Baltimore to St Louis

Late deals on round-trip flights to St Louis from Baltimore, departing today and this week
13 Dec - 19 Dec
$79pp
BWI
Baltimore/Washington
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
BWI
Baltimore/Washington
13 Dec - 19 Dec
$128pp
BWI
Baltimore/Washington
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
BWI
Baltimore/Washington
13 Dec - 8 Jan
$130pp
BWI
Baltimore/Washington
Multiple Airlines
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
BWI
Baltimore/Washington

One-way flights to St Louis from Baltimore

The cheapest one-way flights from Baltimore to St Louis
12:31 pm - 4:47 pm
American Airlines
1 Stop
5h 16m
BWI - STL
American Airlines
1:30 am - 7:11 am
United Airlines
1 Stop
6h 41m
BWI - STL
United Airlines
$118
United
2:47 pm - 11:31 am
Frontier
2 Stops
45h 44m
BWI - STL
Frontier
$119
Kiwi.com

Related info for your journey

Useful info, stats and facts about Baltimore to St Louis flights.

Flight FAQs

From Baltimore to St Louis

Are flight prices decreasing from Baltimore to St Louis due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Baltimore and St Louis for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Baltimore/Washington to Lambert-St Louis to control the spread of COVID-19?

Airlines globally have implemented additional safety measures to accommodate you. Delta is one of them. Airline carriers are regularly disinfecting and sanitizing their aircraft. Masks are provided and are mandatory while on board. Pre-flight testing for symptoms and antibodies, alongside socially distanced seating (for a limited time) will work towards keeping travelers safer while flying from Baltimore/Washington to Lambert-St Louis. Policies will vary by airline.

Which airlines flying from Baltimore/Washington to Lambert-St Louis have flexible cancellations due to COVID-19?

Some of our airline partners flying from Baltimore/Washington to Lambert-St Louis have new flexible policies in place due to COVID-19. American Airlines, Delta, and United Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like American Airlines with this kind of flexibility.

Can I find flights from Baltimore to St Louis for under $100 on Cheapflights?

Yes, there are multiple flights from Baltimore to St Louis for under $100. The cheapest flight booked recently is on Frontier for just $79, but on average you can expect to pay $129.

Are there nonstop flights from Baltimore to St Louis for under $100 on Cheapflights?

There are no nonstop flights from Baltimore to St Louis, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

Are there last-minute flights available from Baltimore to St Louis for under $100?

There are currently 20+ open flights from Baltimore to St Louis within the next 7 days for less than $100.

Does it rain more in Baltimore or St Louis?

Expected rainfall in Baltimore is less than in St Louis. You can expect this to be the case over the next 14 days.

Is Baltimore weather warmer or cooler than St Louis?

You can imagine temperatures to be in the 90 °F range in July. The weather in St Louis is generally the same as Baltimore's. As flight availability is subject to become more limited as peak season approaches it is ideal to book in a timely manner.

How long is the flight from Baltimore to St Louis?

For as low as $173, American Airlines can have you in St Louis from Baltimore in 5h 17m. This flight may include one or multiple stops.

What are the cheapest airlines flying from Baltimore to St Louis round-trip?

Currently priced at $79, Frontier will fly you from Baltimore to St Louis and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on American Airlines for as low as $153. You may be able to fly from Baltimore to St Louis for 72% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from Baltimore to St Louis one-way?

One-way options have recently been found by users for as low as $39 on Frontier. Other airlines that offer cheap prices include American Airlines from $77 and United Airlines from $118 one-way.

Alternative routes for Baltimore to St Louis

Destination information for St Louis

Things to know before you go. Useful info for your trip from Baltimore to St Louis
Average temperature for December in St Louis
46.4 °F
Avg rainfall for December in St Louis
2.5 ″

Airports servicing Baltimore

Airports servicing St. Louis

Top 4 airlines from Baltimore to St Louis

The chart below displays the airlines Cheapflights users traveling from Baltimore to St Louis choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.

Airline Cheapest Average Flexibility On-time COVID-19 safety
Frontier
$111 $261 No cancel fee 62%
Delta
$140 $285 No cancel fee N/A
United Airlines
$101 $324 No cancel fee 69%
American Airlines
$128 $347 No cancel fee 71%

Hourly flight availability from Baltimore to St Louis

Morning 6 AM to noon 47% of BWI to STL departures
Afternoon Noon to 6 PM 42% of BWI to STL departures
Early morning Midnight to 6 AM 7% of BWI to STL departures
Evening 6 PM to midnight 4% of BWI to STL departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from Baltimore to St Louis
Sunday
4 daily flights
Monday
4 daily flights
Tuesday
4 daily flights
Wednesday
4 daily flights
Thursday
4 daily flights
Friday
4 daily flights
Saturday
0 flights
Home North America USA Missouri St Louis Cheap flights from Baltimore to St Louis