Cheap Flights from Baltimore (BWI) to St. Louis (STL) from HK$1,293~

View HK$1,293 flight on Tue, 7 Oct 2025Opens in a new window

Popular airlines from Baltimore Washington Intl. Airport (BWI) to St. Louis Lambert Intl. Airport (STL)

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 35% on select hotels after you book a flight*
  • payments icon
    Earn twice
    Earn your airline miles on top of our rewards
    Sign in

Find Cheap Flights from Baltimore (BWI) to St. Louis (STL)

Prices were available within the past 7 days and start at HK$1,293 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much is a flight from BWI Marshall to Lambert Field?
Round-trip tickets from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Lambert-St. Louis Intl. Airport (STL) start from . This price is based on fares advertised within the last 7 days on Expedia for flights departing within the next year — book ASAP to avoid missing out. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from BWI to St. Louis Lambert International Airport?
Most flights can be canceled online, but whether you are charged a fee varies between airlines. If you do need to cancel your escape, follow the easy instructions in the Customer Service Portal.
How do I find cheap flights from BWI to Lambert Field that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you’re searching for BWI Airport to Lambert Field flights, you’ll see a “no change fees” filter for you to select.
How far is the flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to STL?
With a flight distance of 1,200 kilometers, it’s only a short hop from BWI Marshall to St. Louis Lambert International Airport. It might be a quick journey, but it’s still worth bringing along something to keep you busy on board.
Which airlines fly direct from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to STL?
Southwest Airlines (WN) will get you from BWI Marshall to STL comfortably and reliably. Choose from 95 direct flights every month on this route.
Are BWI Marshall to STL flight tickets cheaper when they're purchased at the last minute?
Last-minute bookings from BWI Marshall to Lambert-St. Louis Intl. Airport (STL) can be hit-or-miss. You may be able to score a great bargain, but then again, you could miss out altogether! If you’d prefer to play it safe and start your travel planning early, Expedia compares flight deals up to a year in advance. Just bear in mind that not all airlines list their prices that far in advance. Our suggestion? Check back often as prices are updated regularly.
*Available to Expedia members.