Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Washington, D.C. from $63

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Washington, D.C. departing on 1/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from St. Louis to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
4:45 pm - 12:27 pmSTL-BWI
18h 42m1 stop
Frontier Logo
8:00 am - 11:33 pmBWI-STL
16h 33m1 stop
$125Frontier
Find Deal
mié., ene. 21 - mar., ene. 27
Multiple Airlines Logo
11:18 am - 11:17 pmSTL-BWI
10h 59m1 stop
Multiple Airlines Logo
8:00 am - 11:33 pmBWI-STL
16h 33m1 stop
$126Multiple Airlines
Find Deal
vie., ene. 23 - mar., ene. 27
Frontier Logo
4:45 pm - 12:27 pmSTL-BWI
18h 42m1 stop
Frontier Logo
8:00 am - 11:33 pmBWI-STL
16h 33m1 stop
$128Frontier
Find Deal
mié., ene. 21 - mié., ene. 28
Multiple Airlines Logo
5:42 pm - 11:17 amSTL-BWI
16h 35m1 stop
Multiple Airlines Logo
8:00 am - 11:33 pmBWI-STL
16h 33m1 stop
$129Multiple Airlines
Find Deal
mié., ene. 21 - mié., ene. 28
Multiple Airlines Logo
11:18 am - 11:17 pmSTL-BWI
10h 59m1 stop
Multiple Airlines Logo
8:00 am - 11:33 pmBWI-STL
16h 33m1 stop
$130Multiple Airlines
Find Deal
vie., ene. 23 - mié., ene. 28
Multiple Airlines Logo
5:42 pm - 11:17 amSTL-BWI
16h 35m1 stop
Multiple Airlines Logo
11:30 am - 11:33 pmBWI-STL
13h 03m1 stop
$131Multiple Airlines
Find Deal
mié., ene. 21 - mar., ene. 27
Multiple Airlines Logo
5:42 pm - 11:17 amSTL-BWI
16h 35m1 stop
Multiple Airlines Logo
11:30 am - 11:33 pmBWI-STL
13h 03m1 stop
$132Multiple Airlines
Find Deal
mié., ene. 21 - mar., ene. 27
Multiple Airlines Logo
4:45 pm - 12:27 pmSTL-BWI
18h 42m1 stop
Multiple Airlines Logo
4:44 pm - 11:33 pmBWI-STL
7h 49m1 stop
$138Multiple Airlines
Find Deal
mié., ene. 21 - vie., ene. 30
Multiple Airlines Logo
5:42 pm - 5:10 pmSTL-BWI
22h 28m1 stop
Multiple Airlines Logo
4:44 pm - 11:33 pmBWI-STL
7h 49m1 stop
$140Multiple Airlines
Find Deal
lun., ene. 26 - vie., ene. 30
Multiple Airlines Logo
5:42 pm - 5:10 pmSTL-BWI
22h 28m1 stop
Multiple Airlines Logo
4:44 pm - 11:33 pmBWI-STL
7h 49m1 stop
$141Multiple Airlines
Find Deal
lun., ene. 26 - vie., ene. 30

Frontier flights from St. Louis to Baltimore

Our best Frontier deals on St. Louis to Baltimore flight tickets
Frontier
Jan 21
STL4:45 pmLambert-St Louis
18h 42m
1 stop
BWI12:27 pmBaltimore/Washington
Jan 27
BWI8:00 amBaltimore/Washington
16h 33m
1 stop
STL11:33 pmLambert-St Louis
$125
Find similar
Frontier
Jan 21
STL4:45 pmLambert-St Louis
18h 42m
1 stop
BWI12:27 pmBaltimore/Washington
Jan 27
BWI8:00 amBaltimore/Washington
16h 33m
1 stop
STL11:33 pmLambert-St Louis
$128
Find similar
Frontier
Jan 7
STL5:11 pmLambert-St Louis
17h 56m
1 stop
BWI12:07 pmBaltimore/Washington
Jan 12
BWI1:02 pmBaltimore/Washington
10h 31m
1 stop
STL10:33 pmLambert-St Louis
$155
Find similar

Delta flights from St. Louis to Baltimore

Our best Delta deals on St. Louis to Baltimore flight tickets
Delta
Dec 2
STL7:05 amLambert-St Louis
4h 41m
1 stop
BWI12:46 pmBaltimore/Washington
Dec 2
BWI5:36 pmBaltimore/Washington
4h 11m
1 stop
STL8:47 pmLambert-St Louis
$487
Find similar
Delta
Dec 1
STL6:00 amLambert-St Louis
5h 46m
1 stop
BWI12:46 pmBaltimore/Washington
Dec 3
BWI10:47 amBaltimore/Washington
7h 23m
1 stop
STL5:10 pmLambert-St Louis
$494
Find similar
Delta
Dec 9
STL1:59 pmLambert-St Louis
4h 33m
1 stop
BWI7:32 pmBaltimore/Washington
Dec 11
BWI12:19 pmBaltimore/Washington
6h 37m
1 stop
STL5:56 pmLambert-St Louis
$498
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Baltimore that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated noviembre 26, 2025.
Use the filters below to find and compare flights from St. Louis to Baltimore that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

mié. 1/21

4:45 pm-12:27 pm

1 stop18h 42m

Baltimore/Washington

mar. 1/27

8:00 am-11:33 pm

1 stop16h 33m

$125

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

vie. 1/23

11:18 am-11:17 pm

1 stop10h 59m

Baltimore/Washington

mar. 1/27

8:00 am-11:33 pm

1 stop16h 33m

$126

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

mié. 1/21

4:45 pm-12:27 pm

1 stop18h 42m

Baltimore/Washington

mié. 1/28

8:00 am-11:33 pm

1 stop16h 33m

$128

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

mié. 1/21

5:42 pm-11:17 am

1 stop16h 35m

Baltimore/Washington

mié. 1/28

8:00 am-11:33 pm

1 stop16h 33m

$129

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

vie. 1/23

11:18 am-11:17 pm

1 stop10h 59m

Baltimore/Washington

mié. 1/28

8:00 am-11:33 pm

1 stop16h 33m

$130

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

mié. 1/21

5:42 pm-11:17 am

1 stop16h 35m

Baltimore/Washington

mar. 1/27

11:30 am-11:33 pm

1 stop13h 03m

$131

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

mié. 1/21

5:42 pm-11:17 am

1 stop16h 35m

Baltimore/Washington

mar. 1/27

11:30 am-11:33 pm

1 stop13h 03m

$132

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

mié. 1/21

4:45 pm-12:27 pm

1 stop18h 42m

Baltimore/Washington

vie. 1/30

4:44 pm-11:33 pm

1 stop7h 49m

$138

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

lun. 1/26

5:42 pm-5:10 pm

1 stop22h 28m

Baltimore/Washington

vie. 1/30

4:44 pm-11:33 pm

1 stop7h 49m

$140

St. LouisBaltimore

STL - BWI

STLBWI

Lambert-St Louis

lun. 1/26

5:42 pm-5:10 pm

1 stop22h 28m

Baltimore/Washington

vie. 1/30

4:44 pm-11:33 pm

1 stop7h 49m

$141

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from St. Louis to Baltimore

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Baltimore?

If you’re not able to fly to Baltimore in September, then March is your next best option. Flight prices from St. Louis to Baltimore during March average around $274.

What is the cheapest day to depart on your flight to Baltimore?

The cheapest day to depart from St. Louis to Baltimore is on a Tuesday. Travelers who choose to depart for Baltimore on a Tuesday will often find tickets for as low as $354. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $486. These prices are subject to change though, so be sure to set up a Price Alert for flights to Baltimore.

What is the cheapest time of day to depart on your flight to Baltimore?

Flying to Baltimore from St. Louis in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $383 when looking at flights departing in the afternoon. Flights in the evening are often more expensive with an average ticket price of $405.

What is the cheapest Lambert-St Louis to Baltimore/Washington flight route?

Fly from Lambert-St Louis to Baltimore/Washington for the best Lambert-St Louis - Baltimore/Washington flight prices

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

You are more likely to see cheaper flights to Baltimore from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Baltimore for around $332 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Baltimore from St. Louis for as low as $227 on momondo.

What cabin class options are available on Lambert-St Louis to Baltimore/Washington flights?

There is only 1 cabin class available to choose from on Lambert-St Louis to Baltimore/Washington flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on St. Louis to Baltimore flights?

No. A direct flight is the cheapest option for a flight between St. Louis to Baltimore.

How have St. Louis to Baltimore flight prices changed over time?

As of November 2025, prices for St. Louis to Baltimore flights are approximately 106% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to Baltimore

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Baltimore according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Baltimore (STL to BWI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Baltimore

Best Price Found

$266

Fastest flight time

1h 55m

Direct flights

Every day

Airports in Baltimore

1 airport
The best one-way flight to Baltimore from St. Louis in the past 72 hours is $266. The best round-trip flight deal from St. Louis to Baltimore found on momondo in the last 72 hours is $391.
The fastest flight from St. Louis to Baltimore takes 1h 55m
Direct flights go from St. Louis to Baltimore every day.
There is 1 airport near Baltimore: Baltimore/Washington (BWI)
Search flight deals

  • How far is Lambert-St Louis to Baltimore/Washington by plane?

    The straight-line distance from Lambert-St Louis to Baltimore/Washington is 730.2 mi. By plane, this route typically takes 6h 50m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Baltimore/Washington Airport?

    Prices for flights from Lambert-St Louis Airport to Baltimore/Washington Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Baltimore/Washington Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Baltimore/Washington Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Baltimore/Washington Airport.

  • What documentation or ID do you need to fly to Baltimore/Washington Airport?

    The travel and health documents required for your trip to Baltimore/Washington Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Baltimore/Washington Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from St. Louis to Baltimore?

  • What is the most popular airline from St. Louis to Baltimore?

Best airlines flying from St. Louis to Baltimore

Compare and see reviews for airlines that fly from St. Louis to Baltimore with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $124Free CancellationRating
5.8
3,099 reviews
Search Frontier flights
American AirlinesPriceFrom $196Free CancellationRating
7.2
11,038 reviews
Search American Airlines flights
DeltaPriceFrom $196Free CancellationRating
7.9
7,998 reviews
Search Delta flights
SouthwestPriceFrom $207Free CancellationRating
8.0
4,254 reviews
Search Southwest flights

  • Southwest Flights From St. Louis to Baltimore

    Southwest flies from St. Louis to Baltimore around 29 times per week, with 4,254 momondo users rating the airline 8.0/10. The cheapest Southwest deal from St. Louis to Baltimore in the last 72 hours was $207 (round-trip), much lower than the average airfare cost of $375 for Southwest flights on this route.

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Baltimore?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Baltimore. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to Baltimore with flexible booking policies on momondo?

All flight searches from St. Louis to Baltimore on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from St. Louis to Baltimore?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Baltimore from St. Louis.

I’m not ready to book a flight from St. Louis to Baltimore right now. Can momondo alert me if prices change?

If you are not ready to book a flight from St. Louis to Baltimore now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Baltimore and let you know when they change.

An easier way to manage your Baltimore trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
vie. 12/26
vie. 1/2
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States