$69 Cheap Flights from Baltimore (BWI) to San Antonio (SAT)

View $69 flight on Fri, Dec 12, 2025Opens in a new window

Popular airlines from Baltimore Washington Intl. Airport (BWI) to San Antonio International Airport (SAT)

  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Baltimore to San Antonio (BWI-SAT)

Prices were available within the past 7 days and start at $69 for one-way flights and $136 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Mon, Nov 17 - Wed, Dec 3
BWI
Baltimore
SAT
San Antonio
$136 Roundtrip, found 4 days ago
$136
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Mon, Nov 17 from Baltimore to San Antonio, returning Wed, Dec 3, priced at $136 found 4 days ago
Frontier Airlines
Fri, Dec 12 - Sun, Dec 14
BWI
Baltimore
SAT
San Antonio
$138 Roundtrip, found 1 hour ago
$138
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, Dec 12 from Baltimore to San Antonio, returning Sun, Dec 14, priced at $138 found 1 hour ago
Frontier Airlines
Mon, Feb 2 - Sat, Feb 14
BWI
Baltimore
SAT
San Antonio
$140 Roundtrip, found 1 hour ago
$140
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Mon, Feb 2 from Baltimore to San Antonio, returning Sat, Feb 14, priced at $140 found 1 hour ago
Frontier Airlines
Fri, Dec 12 - Sun, Dec 14
BWI
Baltimore
SAT
San Antonio
$142 Roundtrip, found 1 hour ago
$142
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, Dec 12 from Baltimore to San Antonio, returning Sun, Dec 14, priced at $142 found 1 hour ago
Frontier Airlines
Fri, Jan 9 - Thu, Jan 15
BWI
Baltimore
SAT
San Antonio
$144 Roundtrip, found 6 hours ago
$144
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Fri, Jan 9 from Baltimore to San Antonio, returning Thu, Jan 15, priced at $144 found 6 hours ago
Frontier Airlines
Fri, Jan 9 - Mon, Jan 12
BWI
Baltimore
SAT
San Antonio
$152 Roundtrip, found 1 hour ago
$152
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, Jan 9 from Baltimore to San Antonio, returning Mon, Jan 12, priced at $152 found 1 hour ago
Spirit Airlines
Thu, Nov 13 - Mon, Nov 17
BWI
Baltimore
SAT
San Antonio
$166 Roundtrip, found 7 hours ago
$166
Roundtrip
found 7 hours ago
Select Spirit Airlines flight, departing Thu, Nov 13 from Baltimore to San Antonio, returning Mon, Nov 17, priced at $166 found 7 hours ago
United
Wed, Jan 7 - Mon, Jan 12
BWI
Baltimore
SAT
San Antonio
$179 Roundtrip, found 1 day ago
$179
Roundtrip
found 1 day ago
Select United flight, departing Wed, Jan 7 from Baltimore to San Antonio, returning Mon, Jan 12, priced at $179 found 1 day ago
Delta
Thu, Dec 11 - Sun, Dec 14
BWI
Baltimore
SAT
San Antonio
$192 Roundtrip, found 1 hour ago
$192
Roundtrip
found 1 hour ago
Select Delta flight, departing Thu, Dec 11 from Baltimore to San Antonio, returning Sun, Dec 14, priced at $192 found 1 hour ago
Southwest Airlines
Wed, Jan 7 - Thu, Jan 8
BWI
Baltimore
SAT
San Antonio
$223 Roundtrip, found 3 days ago
$223
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Wed, Jan 7 from Baltimore to San Antonio, returning Thu, Jan 8, priced at $223 found 3 days ago

Find the cheapest month to fly from Baltimore (BWI) to San Antonio (SAT)

May is typically the cheapest month to fly

From $109 - $450 per traveler.

Alternative airports near San Antonio

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to San Antonio Intl. SAT. Cheapest and Closest option available. Average driving time to city center is 11 minutes. Flights from $223
SAT
San Antonio Intl.
CheapestClosest
Average driving time to city center11 min
Flights from $223
Flights from Baltimore (BWI) to San Antonio (SAT)
Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
San Antonio Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, Spirit Airlines, United
Roundtrip price
$136
Distance
1405 mi
Average flight time
2 hours 55 mins

Baltimore to San Antonio Flights

The cheapest times to fly from Baltimore to San Antonio

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Baltimore to San Antonio are during the month of November. You can find some of the cheapest flights from Baltimore to San Antonio with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Baltimore to San Antonio

Sunday is one of the best days to book for cheap flights from Baltimore to San Antonio: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Baltimore to San Antonio

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Baltimore to San Antonio in 2025. You can also book with separate airlines for your outbound and return journeys, from $69 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Baltimore to San Antonio flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Baltimore to San Antonio airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Antonio Intl. Airport (SAT) cost?
Lock in a cheap one-way flight from $69 or cheap return flight from $136 from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Antonio Intl. Airport (SAT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Antonio Intl. Airport (SAT)?
Flying in November may help you find better deals, as it's the cheapest month for flights between BWI and SAT. You'll typically find the lowest prices during off-peak months.
Which airlines fly direct from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Antonio Intl. Airport (SAT)?
Jump on a direct flight with Southwest Airlines and journey straight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Antonio Intl. Airport (SAT).
What is the cheapest airline that flies from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Antonio Intl. Airport (SAT)?
Use the filters on Expedia to compare different airlines and find the cheapest carrier that'll take you from BWI to SAT. Then, sort your results by "Price (lowest to highest)" to pick up a great deal.
How many flights per day from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Antonio Intl. Airport (SAT)?
On average, only 1 direct flight departs each day from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Antonio Intl. Airport (SAT). Looking for more options? Use our filters to discover flights with layovers and add a new destination to your journey.
What are the most popular departure times for flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Antonio Intl. Airport (SAT)?
The 8 AM departures from BWI to SAT are the top choice for many travelers. These flights can come with a higher price due to their popularity. If you're looking to save, choose a less crowded time to fly.
What day of the week has the most flights from BWI to SAT?
If you depart on a Thursday, you'll get the widest range of options for flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Antonio Intl. Airport (SAT).
What is the earliest flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Antonio Intl. Airport (SAT)?
Baltimore Washington Intl. Thurgood Marshall Airport (BWI)'s earliest flight to San Antonio Intl. Airport (SAT) is at approximately 8:40AM UTC-5. With a flight time of 4h 5m, you'll arrive at around 11:45AM UTC-6.
How long does it take to fly from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Antonio Intl. Airport (SAT)?
It takes about 4 hours and 3 minutes to fly the 1,400 mi from BWI to SAT.
What is the best time to fly from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Antonio Intl. Airport (SAT)?
To avoid potential delays on the Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Antonio Intl. Airport (SAT) route, fly before 3 PM. Later departures have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for San Antonio from Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
If you're on a direct flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Antonio, San Antonio Intl. Airport (SAT) is the only airport you can land at.
Is it cheaper to buy a plane ticket from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Antonio Intl. Airport (SAT) last-minute?
Holding off until just before your trip to book a ticket from BWI to SAT often results in higher prices. While you may come across some last-minute offers, they aren't always guaranteed. Be flexible with your itinerary to boost your chances of snagging a bargain.
Is it cheaper to book a BWI to SAT flight and hotel package?
Compared with arranging flights and hotels separately, booking a BWI to SAT flight and hotel package with Expedia could result in significant savings. Better still, managing everything in one place takes the hassle out of planning your trip. Simply pick your flights and select from our wide range of hotels, then customize your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to San Antonio Intl. Airport (SAT)?
Typically, you're able to reschedule or cancel your BWI to SAT flight. However, additional charges may apply, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you want more details, go to our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.