Flights from Baltimore to San Antonio from $155 - Compare and Save

One-way flight from Baltimore/Washington to San Antonio

Highest demand for flights based on searches. 5% potential increase in price ($21 potential increase over avg. RT price).

Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).

Average for round-trip flights in August 2025

Find flight deals from Baltimore to San Antonio

Cheapest flights from Baltimore to San Antonio
Explore the most affordable flight options available from Baltimore to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 7, 2025.

Sat 9/65:45 amBWI - SAT

1 stop14h 47mSpirit Airlines

Sat 9/138:37 pmSAT - BWI

1 stop9h 24mSpirit Airlines

Deal found 8/5

$155

Sat 9/135:45 amBWI - SAT

1 stop14h 47mSpirit Airlines

Sat 9/208:37 pmSAT - BWI

1 stop9h 24mSpirit Airlines

Deal found 8/6

$165

Sat 8/305:45 amBWI - SAT

1 stop14h 38mSpirit Airlines

Sat 9/68:37 pmSAT - BWI

1 stop9h 24mSpirit Airlines

Deal found 8/5

$167

Sat 9/135:45 amBWI - SAT

1 stop14h 47mSpirit Airlines

Thu 9/188:37 pmSAT - BWI

1 stop9h 24mSpirit Airlines

Deal found 8/6

$180

Thu 9/45:45 amBWI - SAT

1 stop14h 47mSpirit Airlines

Sat 9/68:37 pmSAT - BWI

1 stop9h 24mSpirit Airlines

Deal found 8/6

$186

Tue 9/98:16 amBWI - SAT

1 stop13h 36mSpirit Airlines

Sat 9/138:37 pmSAT - BWI

1 stop9h 24mSpirit Airlines

Deal found 8/5

$190

Sat 9/135:45 amBWI - SAT

1 stop14h 47mSpirit Airlines

Mon 9/158:37 pmSAT - BWI

1 stop9h 24mSpirit Airlines

Deal found 8/6

$197

Best flights from Baltimore to San Antonio
Discover carefully curated flight deals from Baltimore to San Antonio that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 7, 2025.

Sat 9/65:45 amBWI - SAT

1 stop14h 47mSpirit Airlines

Sat 9/138:37 pmSAT - BWI

1 stop9h 24mSpirit Airlines

Deal found 8/5

$155

Sat 9/135:45 amBWI - SAT

1 stop14h 47mSpirit Airlines

Sat 9/208:37 pmSAT - BWI

1 stop9h 24mSpirit Airlines

Deal found 8/6

$165

Sat 8/305:45 amBWI - SAT

1 stop14h 38mSpirit Airlines

Sat 9/68:37 pmSAT - BWI

1 stop9h 24mSpirit Airlines

Deal found 8/5

$167

Sat 9/135:45 amBWI - SAT

1 stop14h 47mSpirit Airlines

Thu 9/188:37 pmSAT - BWI

1 stop9h 24mSpirit Airlines

Deal found 8/6

$180

Thu 9/45:45 amBWI - SAT

1 stop14h 47mSpirit Airlines

Sat 9/68:37 pmSAT - BWI

1 stop9h 24mSpirit Airlines

Deal found 8/6

$186

Tue 9/98:16 amBWI - SAT

1 stop13h 36mSpirit Airlines

Sat 9/138:37 pmSAT - BWI

1 stop9h 24mSpirit Airlines

Deal found 8/5

$190

Sat 9/135:45 amBWI - SAT

1 stop14h 47mSpirit Airlines

Mon 9/158:37 pmSAT - BWI

1 stop9h 24mSpirit Airlines

Deal found 8/6

$197

Last-minute flights from Baltimore to San Antonio
Discover last-minute flight deals from Baltimore to San Antonio. Data last updated August 7, 2025 and is based on user searches.

Mon 8/117:15 amBWI - SAT

1 stop10h 37mFrontier

Mon 8/185:38 pmSAT - BWI

1 stop5h 47mFrontier

Deal found 8/5

$238

Mon 8/1110:34 amBWI - SAT

1 stop7h 18mFrontier

Fri 8/155:38 pmSAT - BWI

1 stop5h 47mFrontier

Deal found 8/6

$239

Mon 8/115:26 pmBWI - SAT

1 stop25h 36mFrontier

Thu 8/148:14 pmSAT - BWI

1 stop19h 17mFrontier

Deal found 8/6

$245

Mon 8/115:26 pmBWI - SAT

1 stop25h 36mMultiple Airlines

Wed 8/138:28 pmSAT - BWI

1 stop9h 26mMultiple Airlines

Deal found 8/6

$280

Mon 8/1110:34 amBWI - SAT

1 stop7h 18mMultiple Airlines

Tue 8/127:45 amSAT - BWI

1 stop8h 47mMultiple Airlines

Deal found 8/5

$284

Wed 8/135:45 amBWI - SAT

1 stop14h 38mSpirit Airlines

Sat 8/238:28 pmSAT - BWI

1 stop9h 26mSpirit Airlines

Deal found 8/5

$267

Wed 8/135:45 amBWI - SAT

1 stop14h 38mMultiple Airlines

Thu 8/148:14 pmSAT - BWI

1 stop19h 17mMultiple Airlines

Deal found 8/6

$294

Fri 8/1510:34 amBWI - SAT

1 stop7h 18mMultiple Airlines

Mon 8/258:28 pmSAT - BWI

1 stop9h 26mMultiple Airlines

Deal found 8/6

$207

Fri 8/1510:34 amBWI - SAT

1 stop7h 18mMultiple Airlines

Sun 8/173:18 pmSAT - BWI

1 stop12h 57mMultiple Airlines

Deal found 8/5

$247

Fri 8/159:57 pmBWI - SAT

2 stops18h 47mSpirit Airlines

Mon 8/258:28 pmSAT - BWI

1 stop9h 26mSpirit Airlines

Deal found 8/6

$270

Sat 8/305:45 amBWI - SAT

1 stop14h 38mSpirit Airlines

Sat 9/68:37 pmSAT - BWI

1 stop9h 24mSpirit Airlines

Deal found 8/5

$167

Thu 9/45:45 amBWI - SAT

1 stop14h 47mSpirit Airlines

Sat 9/68:37 pmSAT - BWI

1 stop9h 24mSpirit Airlines

Deal found 8/6

$186

One-way flights from Baltimore to San Antonio
Search for one-way flight options from Baltimore to San Antonio. Find affordable one-way fares based on user searches. Data last updated August 7, 2025.

Sat 9/135:45 amBWI - SAT

1 stop14h 47mSpirit Airlines

Deal found 8/6

$59

Mon 8/255:45 amBWI - SAT

1 stop14h 38mSpirit Airlines

Deal found 8/6

$82

Sat 9/65:45 amBWI - SAT

1 stop14h 47mSpirit Airlines

Deal found 8/4

$85

Tue 11/45:35 amBWI - SAT

1 stop9h 29mSpirit Airlines

Deal found 8/6

$88

Wed 9/105:45 amBWI - SAT

2 stops16h 07mSpirit Airlines

Deal found 8/6

$94

Wed 8/275:45 amBWI - SAT

1 stop14h 38mSpirit Airlines

Deal found 8/4

$95

Sat 8/305:45 amBWI - SAT

1 stop14h 38mSpirit Airlines

Deal found 8/6

$96

Sat 9/205:45 amBWI - SAT

1 stop14h 47mSpirit Airlines

Deal found 8/6

$99

Tue 10/145:35 amBWI - SAT

1 stop9h 29mSpirit Airlines

Deal found 8/5

$100

Wed 8/205:45 amBWI - SAT

1 stop14h 38mSpirit Airlines

Deal found 8/5

$103

Tue 10/215:35 amBWI - SAT

1 stop9h 29mSpirit Airlines

Deal found 8/6

$106

Tue 9/95:45 amBWI - SAT

2 stops16h 07mSpirit Airlines

Deal found 8/6

$110

Cheapflights Fare Finder

Use the filters below to find and compare flights from Baltimore to San Antonio that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Sat 9/6

5:45 am-7:32 pm

1 stop14h 47m

San Antonio

Sat 9/13

8:37 pm-7:01 am

1 stop9h 24m

$155

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Sat 9/13

5:45 am-7:32 pm

1 stop14h 47m

San Antonio

Sat 9/20

8:37 pm-7:01 am

1 stop9h 24m

$165

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Sat 8/30

5:45 am-7:23 pm

1 stop14h 38m

San Antonio

Sat 9/6

8:37 pm-7:01 am

1 stop9h 24m

$167

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Sat 9/13

5:45 am-7:32 pm

1 stop14h 47m

San Antonio

Thu 9/18

8:37 pm-7:01 am

1 stop9h 24m

$180

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Thu 9/4

5:45 am-7:32 pm

1 stop14h 47m

San Antonio

Sat 9/6

8:37 pm-7:01 am

1 stop9h 24m

$186

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Tue 9/9

8:16 am-8:52 pm

1 stop13h 36m

San Antonio

Sat 9/13

8:37 pm-7:01 am

1 stop9h 24m

$190

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Sat 9/13

5:45 am-7:32 pm

1 stop14h 47m

San Antonio

Mon 9/15

8:37 pm-7:01 am

1 stop9h 24m

$197

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Sat 9/13

5:45 am-7:32 pm

1 stop14h 47m

$59

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Mon 8/25

5:45 am-7:23 pm

1 stop14h 38m

$82

BaltimoreSan Antonio

BWI - SAT

BWISAT

Baltimore/Washington

Sat 9/6

5:45 am-7:32 pm

1 stop14h 47m

$85

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/6

Showing 1-10 of 19 results

The best insider tips for Baltimore to San Antonio flights

Cheapflights partnered with top experts to bring you the best recommendations for your Baltimore to San Antonio trip

Airports

BWI

For early morning flights, arrive 20-30 minutes early due to busy security lines from 6-8 a.m. on weekdays.

SAT

Use rideshare services from SAT's lower level of Terminal A for convenient city access.

Our travel experts

Emily Zemler

Expert on BWI

Ramsey Qubein

Expert on SAT

Best time to book a flight from Baltimore to San Antonio

Have a flexible travel schedule? Discover the best time to fly to San Antonio from Baltimore with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Baltimore to San Antonio

How far ahead should I book a flight from Baltimore to San Antonio?

To ensure you get the cheapest price possible for a flight from Baltimore to San Antonio, you should look to book at least 45 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Baltimore to San Antonio?

Currently, August is the cheapest month in which you can book a flight from Baltimore to San Antonio (average of $295). Flying from Baltimore to San Antonio in March is currently the most expensive (average of $376). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BWI to SAT?

It’s typically best to fly out from Baltimore to San Antonio in the morning. Doing so could potentially save you 32% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Baltimore to San Antonio?

Travelers seeking maximum savings on their Baltimore to San Antonio flight should consider departing on Friday mornings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

What’s the top layover airport for flights from Baltimore to San Antonio?

Las Vegas (LAS) – chosen by Cheapflights users on 50% of 1-stop itineraries from Baltimore to San Antonio on Cheapflights.

What’s the cheapest layover airport for flights from Baltimore to San Antonio?

Atlanta (ATL) is the most affordable 1-stop option, with an average round-trip price of $171.

What’s the fastest layover option from Baltimore to San Antonio?

Flights via Atlanta (ATL) have the shortest average one-way travel time for 1-stop routes: 6h 29m.

Which airport typically offers the quickest layover for flights from Baltimore to San Antonio?

Flights via Atlanta (ATL) offer the fastest connection on this route, with an average layover time of 2h 11m.

Reviews of airlines servicing San Antonio

Get a feel of what it's like to fly with Southwest, United Airlines, and American Airlines from Baltimore to San Antonio by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

8.0

Very good

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

8.0

Very good

8.0

Very good

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

United Airlines

7.4

Good

8,917 reviews

8.0

Very good

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

American Airlines

7.2

Good

10,000 reviews

8.0

Very good

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Spirit Airlines

6.3

Okay

8,055 reviews

8.0

Very good

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Frontier

5.9

Fair

3,231 reviews

8.0

Very good