What’s the top layover airport for flights from Washington, D.C. Dulles Intl Airport to San Antonio?

Phoenix (PHX) – chosen by Cheapflights users on 67% of 1-stop itineraries from Washington, D.C. Dulles Intl Airport to San Antonio on Cheapflights.

What’s the fastest layover option from Washington, D.C. Dulles Intl Airport to San Antonio?

Flights via Phoenix (PHX) have the shortest average one-way travel time for 1-stop routes: 7h 45m.

What’s the cheapest layover airport for flights from Washington, D.C. Dulles Intl Airport to San Antonio?

Phoenix (PHX) is the most affordable 1-stop option, with an average round-trip price of $288.

Which airport typically offers the quickest layover for flights from Washington, D.C. Dulles Intl Airport to San Antonio?

Flights via Phoenix (PHX) offer the fastest connection on this route, with an average layover time of 1h 28m.

How long is the flight from Washington, D.C. Dulles Intl Airport to San Antonio?

A quick flight from Washington, D.C. Dulles Intl Airport to San Antonio can take about 3h 51m. United Airlines provides one of the quickest options available for as low as $249. Airlines will cover a distance of 1360 mi. This flight may include one or multiple stops.

What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to San Antonio round-trip?

Cheapflights users have booked flights from Washington, D.C. Dulles Intl Airport to San Antonio round-trip from $181. Other airlines that can offer you cheap pricing are American Airlines, from $218, and Delta, from $242. You may be able to fly from Washington, D.C. Dulles Intl Airport to San Antonio for 55% less than the average price by searching for these airlines.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to San Antonio?

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to San Antonio flight should consider departing on Saturday at noon when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Washington, D.C. Dulles Intl Airport to San Antonio

The most flights from IAD to SAT are scheduled on a Monday (6 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (4 on average).

In terms of precipitation, rainfall in San Antonio ranges from 1.6 - 3.7 inches per month. May is typically the wettest month, when rainfall can reach 3.7 in. December is typically the driest time to visit San Antonio when rainfall is around 1.6 in.

If weather is an important factor for your trip to San Antonio, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

What are the cheapest flights from Washington, D.C. Dulles Intl Airport to San Antonio?

Looking at all options, your cheapest flight can be booked for $129. While the most popular route (Washington, D.C. Dulles Intl - San Antonio) can be booked for $206 on average, our data indicates $318 when flying from Washington, D.C. Dulles Intl Airport to San Antonio.

What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to San Antonio?

Consider Mesa Airlines (100%), United Airlines (93%) or Air Canada (87%) when booking your flight. These represent the most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to San Antonio.

What are the most popular airlines that fly from Washington, D.C. Dulles Intl Airport to San Antonio?

Consider American Airlines, Delta or United Airlines when booking your flight. These represent the most popular airlines when flying from Washington, D.C. Dulles Intl Airport to San Antonio.

What airport do you fly into for flights to San Antonio from Washington, D.C. Dulles Intl?

San Antonio (SAT), located 7.6 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. Dulles Intl to San Antonio. 4 airlines have flights to San Antonio from Washington, D.C. Dulles Intl on a regular basis. Booking flights from Washington, D.C. Dulles Intl to San Antonio should not be difficult; the airport handles an average of 5 inbound flights from Washington, D.C. Dulles Intl per day.

Can I find deals for flights from Dulles Intl to San Antonio that include hotel bookings?

Yes. In addition to deals on Dulles Intl to San Antonio flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Dulles Intl to San Antonio?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to San Antonio.

Can I find deals for business class flights from Dulles Intl to San Antonio?

Yes. Cheapflights offers flight deals from Dulles Intl to San Antonio by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$78+ Cheap Flights from Washington, D.C. Dulles Intl Airport to San Antonio

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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to San Antonio are usually found in August or January, booked 57 days in advance, depart on a Wednesday or Tuesday and return on a Friday

Cheap flight deals from Dulles Intl to San Antonio

Round-trip from	$243 (Frontier)
One-way from	$78 (Booking.com)
Popular in	March
Cheapest in	August
Average price	$353
Good round-trip deal	$319 or less
Good one-way deal	$148 or less

From Washington, D.C. Dulles Intl to San Antonio

Search Deals

One-way flight from Washington, D.C. Dulles Intl to San Antonio

Search Deals

Highest demand for flights based on searches. 7% potential increase in price ($31 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to San Antonio.

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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to San Antonio.

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Find flight deals from Dulles Intl to San Antonio

Cheapest flights from Dulles Intl to San Antonio
Explore the most affordable flight options available from Dulles Intl to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

Thu 10/28:59 pmIAD - SAT

2 stops22h 31mFrontier

Sat 10/43:22 pmSAT - IAD

2 stops16h 55mFrontier

Deal found 9/15

$243

Mon 11/36:00 amIAD - SAT

1 stop11h 40mFrontier

Sun 11/98:25 pmSAT - IAD

2 stops26h 46mFrontier

Deal found 9/14

$246

Sat 10/254:22 pmIAD - SAT

1 stop25h 30mMultiple Airlines

Sun 11/24:55 pmSAT - IAD

1 stop25h 56mMultiple Airlines

Deal found 9/15

$247

Thu 11/68:15 amIAD - SAT

Nonstop3h 51mUnited Airlines

Tue 11/117:07 amSAT - IAD

Nonstop3h 12mUnited Airlines

Deal found 9/15

$249

Fri 9/196:10 amIAD - SAT

1 stop11h 20mFrontier

Mon 9/225:40 pmSAT - IAD

1 stop5h 35mFrontier

Deal found 9/17

$250

Sat 10/254:22 pmIAD - SAT

1 stop25h 30mFrontier

Sun 11/28:25 pmSAT - IAD

2 stops19h 58mFrontier

Deal found 9/15

$251

Sat 10/115:33 pmIAD - SAT

Nonstop3h 32mUnited Airlines

Tue 10/145:56 pmSAT - IAD

1 stop4h 55mUnited Airlines

Deal found 9/15

$253

Wed 11/1212:31 pmIAD - SAT

1 stop6h 45mDelta

Wed 11/192:39 pmSAT - IAD

1 stop8h 13mDelta

Deal found 9/15

$257

Fri 10/316:00 amIAD - SAT

1 stop11h 40mMultiple Airlines

Sun 11/24:55 pmSAT - IAD

1 stop25h 56mMultiple Airlines

Deal found 9/16

$258

Thu 10/96:01 amIAD - SAT

1 stop5h 48mUnited Airlines

Mon 10/137:00 amSAT - IAD

Nonstop3h 19mUnited Airlines

Deal found 9/16

$259

Sun 9/2810:09 pmIAD - SAT

2 stops22h 06mFrontier

Thu 10/28:20 pmSAT - IAD

2 stops15h 35mFrontier

Deal found 9/14

$262

Sat 11/15:10 pmIAD - SAT

1 stop6h 32mDelta

Wed 11/54:35 pmSAT - IAD

1 stop5h 25mDelta

Deal found 9/15

$263

Best flights from Dulles Intl to San Antonio
Discover carefully curated flight deals from Dulles Intl to San Antonio that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 17, 2025.

Wed 11/198:15 amIAD - SAT

Nonstop3h 51mUnited Airlines

Mon 11/247:07 amSAT - IAD

Nonstop3h 12mUnited Airlines

Deal found 9/16

$249

Wed 10/229:50 amIAD - SAT

1 stop7h 06mDelta

Wed 10/295:25 amSAT - IAD

1 stop5h 04mDelta

Deal found 9/15

$257

Wed 12/107:40 amIAD - SAT

1 stop9h 30mSouthwest

Sun 12/143:35 pmSAT - IAD

1 stop6h 55mSouthwest

Deal found 9/17

$263

Sat 10/115:33 pmIAD - SAT

Nonstop3h 32mUnited Airlines

Tue 10/146:45 amSAT - IAD

1 stop6h 06mUnited Airlines

Deal found 9/16

$253

Sat 11/13:00 pmIAD - SAT

1 stop7h 10mDelta

Tue 11/410:54 amSAT - IAD

1 stop5h 03mDelta

Deal found 9/16

$263

Wed 11/129:57 amIAD - SAT

1 stop8h 01mUnited Airlines

Wed 11/194:24 pmSAT - IAD

1 stop4h 48mUnited Airlines

Deal found 9/16

$257

Thu 12/256:00 amIAD - SAT

1 stop6h 07mDelta

Wed 12/315:10 amSAT - IAD

1 stop6h 02mDelta

Deal found 9/16

$263

Thu 11/135:25 pmIAD - SAT

Nonstop3h 50mUnited Airlines

Sun 11/165:13 pmSAT - IAD

1 stop5h 46mUnited Airlines

Deal found 9/17

$259

Thu 11/206:00 amIAD - SAT

1 stop5h 43mUnited Airlines

Sun 11/237:07 amSAT - IAD

Nonstop3h 12mUnited Airlines

Deal found 9/15

$259

Fri 12/55:25 pmIAD - SAT

Nonstop3h 50mUnited Airlines

Mon 12/812:49 pmSAT - IAD

1 stop7h 32mUnited Airlines

Deal found 9/15

$259

Mon 11/38:15 amIAD - SAT

Nonstop3h 51mUnited Airlines

Sun 11/97:07 amSAT - IAD

Nonstop3h 12mUnited Airlines

Deal found 9/14

$263

Sat 10/255:33 pmIAD - SAT

Nonstop3h 32mUnited Airlines

Wed 10/297:07 amSAT - IAD

Nonstop3h 12mUnited Airlines

Deal found 9/14

$265

Last-minute flights from Dulles Intl to San Antonio
Discover last-minute flight deals from Dulles Intl to San Antonio. Data last updated September 17, 2025 and is based on user searches.

Fri 9/196:10 amIAD - SAT

1 stop11h 20mFrontier

Mon 9/225:40 pmSAT - IAD

1 stop5h 35mFrontier

Deal found 9/17

$250

Thu 9/258:59 pmIAD - SAT

2 stops20h 31mFrontier

Mon 9/295:40 pmSAT - IAD

1 stop5h 35mFrontier

Deal found 9/15

$265

Sun 9/2810:09 pmIAD - SAT

2 stops22h 06mFrontier

Thu 10/28:20 pmSAT - IAD

2 stops15h 35mFrontier

Deal found 9/14

$262

Thu 10/28:59 pmIAD - SAT

2 stops22h 31mFrontier

Sat 10/43:22 pmSAT - IAD

2 stops16h 55mFrontier

Deal found 9/15

$243

Thu 10/96:01 amIAD - SAT

1 stop5h 48mUnited Airlines

Sun 10/127:00 amSAT - IAD

Nonstop3h 19mUnited Airlines

Deal found 9/16

$259

Sat 10/115:33 pmIAD - SAT

Nonstop3h 32mUnited Airlines

Tue 10/145:56 pmSAT - IAD

1 stop4h 55mUnited Airlines

Deal found 9/15

$253

Wed 10/229:50 amIAD - SAT

1 stop7h 06mDelta

Wed 10/295:25 amSAT - IAD

1 stop5h 04mDelta

Deal found 9/15

$257

Sat 10/254:22 pmIAD - SAT

1 stop25h 30mMultiple Airlines

Sun 11/24:55 pmSAT - IAD

1 stop25h 56mMultiple Airlines

Deal found 9/15

$247

Sat 10/254:22 pmIAD - SAT

1 stop25h 30mFrontier

Sun 11/28:25 pmSAT - IAD

2 stops19h 58mFrontier

Deal found 9/15

$251

Fri 10/315:25 pmIAD - SAT

Nonstop3h 50mUnited Airlines

Sun 11/27:07 amSAT - IAD

Nonstop3h 12mUnited Airlines

Deal found 9/16

$249

Fri 10/316:00 amIAD - SAT

1 stop11h 40mMultiple Airlines

Sun 11/24:55 pmSAT - IAD

1 stop25h 56mMultiple Airlines

Deal found 9/16

$258

One-way flights from Dulles Intl to San Antonio
Search for one-way flight options from Dulles Intl to San Antonio. Find affordable one-way fares based on user searches. Data last updated September 17, 2025.

Thu 10/98:02 pmIAD - SAT

1 stop23h 13mFrontier

Deal found 9/14

$78

Sun 10/266:15 amIAD - SAT

1 stop11h 37mFrontier

Deal found 9/17

$79

Fri 10/246:15 amIAD - SAT

1 stop11h 35mFrontier

Deal found 9/14

$92

Fri 10/176:15 amIAD - SAT

1 stop11h 35mFrontier

Deal found 9/15

$111

Thu 10/238:02 pmIAD - SAT

1 stop23h 13mFrontier

Deal found 9/15

$112

Fri 11/76:00 amIAD - SAT

1 stop11h 40mFrontier

Deal found 9/16

$124

Thu 10/168:02 pmIAD - SAT

1 stop23h 13mFrontier

Deal found 9/15

$125

Fri 12/56:00 amIAD - SAT

1 stop12h 47mFrontier

Deal found 9/15

$126

Thu 11/2011:12 amIAD - SAT

1 stop12h 15mMultiple Airlines

Deal found 9/14

$127

Thu 11/135:34 pmIAD - SAT

1 stop24h 06mFrontier

Deal found 9/17

$128

Tue 10/215:10 pmIAD - SAT

1 stop6h 32mDelta

Deal found 9/14

$129

Tue 10/219:00 amIAD - SAT

2 stops31h 14mFrontier

Deal found 9/17

$133

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to San Antonio that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Wed 11/19

8:15 am-11:06 am

Nonstop3h 51m

San Antonio

Mon 11/24

7:07 am-11:19 am

Nonstop3h 12m

$249

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Sat 10/11

5:33 pm-8:05 pm

Nonstop3h 32m

San Antonio

Tue 10/14

6:45 am-1:51 pm

1 stop6h 06m

$253

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Wed 10/22

9:50 am-3:56 pm

1 stop7h 06m

San Antonio

Wed 10/29

5:25 am-11:29 am

1 stop5h 04m

$257

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Wed 11/12

9:57 am-4:58 pm

1 stop8h 01m

San Antonio

Wed 11/19

4:24 pm-10:12 pm

1 stop4h 48m

$257

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Thu 11/13

5:25 pm-8:15 pm

Nonstop3h 50m

San Antonio

Sun 11/16

5:13 pm-11:59 pm

1 stop5h 46m

$259

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Thu 11/20

6:00 am-10:43 am

1 stop5h 43m

San Antonio

Sun 11/23

7:07 am-11:19 am

Nonstop3h 12m

$259

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Fri 12/5

5:25 pm-8:15 pm

Nonstop3h 50m

San Antonio

Mon 12/8

12:49 pm-9:21 pm

1 stop7h 32m

$259

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Wed 12/10

7:40 am-4:10 pm

1 stop9h 30m

San Antonio

Sun 12/14

3:35 pm-11:30 pm

1 stop6h 55m

$263

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Sat 11/1

3:00 pm-9:10 pm

1 stop7h 10m

San Antonio

Tue 11/4

10:54 am-4:57 pm

1 stop5h 03m

$263

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Thu 12/25

6:00 am-11:07 am

1 stop6h 07m

San Antonio

Wed 12/31

5:10 am-12:12 pm

1 stop6h 02m

$263

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 23 results

The best insider tips for Washington, D.C. Dulles Intl Airport to San Antonio flights

Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to San Antonio trip

Airports

IAD

Check-in at IAD can be crowded in the afternoon and evening. Arrive early to navigate the busy check-in and security areas smoothly.

SAT

For a quick trip downtown from SAT, use Route 5 bus. It takes about 30 minutes and is a convenient option.

Our travel experts

Ramsey Qubein

Expert on SAT and IAD

Best time to book a flight from Dulles Intl to San Antonio

Have a flexible travel schedule? Discover the best time to fly to San Antonio from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to San Antonio

Prices

Airlines

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to San Antonio?

The best time to book flights from Washington, D.C. Dulles Intl Airport to San Antonio is 57 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to San Antonio?

Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Antonio (average of $295). Flying from Washington, D.C. Dulles Intl Airport 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 IAD to SAT?

Unlike in the morning, when flights are generally more expensive, you can save up to 31% on flights from Washington, D.C. Dulles Intl Airport to San Antonio by exploring options for tickets at noon.

Reviews of airlines servicing San Antonio

See what other customers who have flown with Southwest, Delta, and United Airlines from Washington, D.C. Dulles Intl Airport to San Antonio have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,242 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Southwest

8.0

Very good

4,242 reviews

Southwest

8.0

Very good

4,242 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Delta

8.0

Very good

7,961 reviews

Southwest

8.0

Very good

4,242 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

United Airlines

7.4

Good

8,926 reviews

Southwest

8.0

Very good

4,242 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,242 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

What airport do you fly into for flights to San Antonio from Washington, D.C. Dulles Intl?
San Antonio (SAT), located 7.6 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. Dulles Intl to San Antonio. 4 airlines have flights to San Antonio from Washington, D.C. Dulles Intl on a regular basis. Booking flights from Washington, D.C. Dulles Intl to San Antonio should not be difficult; the airport handles an average of 5 inbound flights from Washington, D.C. Dulles Intl per day.
How long is the flight from Washington, D.C. Dulles Intl Airport to San Antonio?
A quick flight from Washington, D.C. Dulles Intl Airport to San Antonio can take about 3h 51m. United Airlines provides one of the quickest options available for as low as $249. Airlines will cover a distance of 1360 mi. This flight may include one or multiple stops.
What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to San Antonio round-trip?
Cheapflights users have booked flights from Washington, D.C. Dulles Intl Airport to San Antonio round-trip from $181. Other airlines that can offer you cheap pricing are American Airlines, from $218, and Delta, from $242. You may be able to fly from Washington, D.C. Dulles Intl Airport to San Antonio for 55% less than the average price by searching for these airlines.
What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to San Antonio?
Consider Mesa Airlines (100%), United Airlines (93%) or Air Canada (87%) when booking your flight. These represent the most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to San Antonio.
What are the cheapest flights from Washington, D.C. Dulles Intl Airport to San Antonio?
Looking at all options, your cheapest flight can be booked for $129. While the most popular route (Washington, D.C. Dulles Intl - San Antonio) can be booked for $206 on average, our data indicates $318 when flying from Washington, D.C. Dulles Intl Airport to San Antonio.
Can I find deals for flights from Dulles Intl to San Antonio that include hotel bookings?
Yes. In addition to deals on Dulles Intl to San Antonio flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Dulles Intl to San Antonio?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to San Antonio.
Can I find deals for business class flights from Dulles Intl to San Antonio?
Yes. Cheapflights offers flight deals from Dulles Intl to San Antonio by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to San Antonio?
Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Antonio (average of $295). Flying from Washington, D.C. Dulles Intl Airport 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.

See more FAQs

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Alternative routes for Dulles Intl to San Antonio

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Other flights to San Antonio

Top 4 airlines flying from Dulles Intl to San Antonio

Airline	Cheapest	Average	Flexibility	On-time
Southwest	Cheapest$181	Average$259	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$218	Average$379	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$242	Average$336	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$252	Average$421	FlexibilityNo cancel fee	On-time69%

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$78+ Cheap flights from Dulles Intl (IAD) to San Antonio (SAT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/9. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to San Antonio are usually found in August or January, booked 57 days in advance, depart on a Wednesday or Tuesday and return on a Friday

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Cheapest flights from Dulles Intl to San AntonioExplore the most affordable flight options available from Dulles Intl to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

Explore the most affordable flight options available from Dulles Intl to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

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The best insider tips for Washington, D.C. Dulles Intl Airport to San Antonio flights

Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to San Antonio trip

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Best time to book a flight from Dulles Intl to San Antonio

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

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to San Antonio

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to San Antonio?

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

Weekly flight availability from Washington, D.C. Dulles Intl Airport to San Antonio

What’s the top layover airport for flights from Washington, D.C. Dulles Intl Airport to San Antonio?

What’s the fastest layover option from Washington, D.C. Dulles Intl Airport to San Antonio?

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Which airport typically offers the quickest layover for flights from Washington, D.C. Dulles Intl Airport to San Antonio?

Reviews of airlines servicing San Antonio

See what other customers who have flown with Southwest, Delta, and United Airlines from Washington, D.C. Dulles Intl Airport to San Antonio have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to San Antonio. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to San Antonio from Washington, D.C. Dulles Intl?

How long is the flight from Washington, D.C. Dulles Intl Airport to San Antonio?

What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to San Antonio round-trip?

What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to San Antonio?

What are the cheapest flights from Washington, D.C. Dulles Intl Airport to San Antonio?

Can I find deals for flights from Dulles Intl to San Antonio that include hotel bookings?

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What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to San Antonio?

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Alternative routes for Dulles Intl to San Antonio

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Top 4 airlines flying from Dulles Intl to San Antonio

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Cheapest flights from Dulles Intl to San Antonio
Explore the most affordable flight options available from Dulles Intl to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.