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 $230. Other airlines that can offer you cheap pricing are Delta, from $237, and Southwest, from $244. You may be able to fly from Washington, D.C. Dulles Intl Airport to San Antonio for 43% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to San Antonio one-way?

One-way options have recently been found by users for as low as $95 on United Airlines. Other airlines that offer cheap prices include Southwest from $96 and Delta from $119 one-way.

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. Wednesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 $181 on average our data indicates $458 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 United Airlines (80%), Air Canada (79%) or Mesa Airlines (78%) 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 is the cheapest day to fly round-trip from Washington, D.C. Dulles Intl Airport to San Antonio?

Tuesday is generally a great day to depart. Flying on this day could help you save up to 27%.

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

May can be a great time to fly to San Antonio from Washington, D.C. Dulles Intl Airport with a flight ticket averaging about $382. Cheapflights users have found deals in the month of May for as cheap as $108. The most expensive prices can be found in the month of December.

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 4 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.

$91+ Flights from Washington, D.C. Dulles Intl Airport to San Antonio

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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 Thursday and return on a Thursday

Cheap flight deals from Dulles Intl to San Antonio

Round-trip from	$230 (United Airlines)
One-way from	$91 (Mytrip)
Popular in	March
Cheapest in	August
Average price	$419
Good round-trip deal	$314 or less
Good one-way deal	$129 or less

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

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

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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 June 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 June 12, 2025.

Sat 11/18:15 amIAD - SAT

Nonstop3h 51mUnited Airlines

Wed 11/57:07 amSAT - IAD

Nonstop3h 12mUnited Airlines

Deal found 6/12

$231

Sat 8/99:20 pmIAD - SAT

1 stop20h 13mMultiple Airlines

Sat 8/165:20 amSAT - IAD

2 stops27h 54mMultiple Airlines

Deal found 6/11

$235

Wed 9/36:00 amIAD - SAT

1 stop8h 03mDelta

Tue 9/912:41 pmSAT - IAD

1 stop9h 51mDelta

Deal found 6/11

$237

Fri 7/47:00 amIAD - SAT

1 stop7h 40mSouthwest

Thu 7/105:20 amSAT - IAD

1 stop12h 45mSouthwest

Deal found 6/11

$244

Fri 8/296:10 amIAD - SAT

1 stop11h 40mFrontier

Fri 9/55:35 pmSAT - IAD

1 stop5h 31mFrontier

Deal found 6/11

$266

Tue 9/166:25 amIAD - SAT

1 stop11h 17mAmerican Airlines

Sun 9/215:00 amSAT - IAD

1 stop4h 57mAmerican Airlines

Deal found 6/11

$306

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 June 12, 2025.

Wed 10/228:30 amIAD - SAT

1 stop5h 45mUnited Airlines

Fri 10/314:24 pmSAT - IAD

1 stop4h 48mUnited Airlines

Deal found 6/12

$230

Sat 8/99:20 pmIAD - SAT

1 stop20h 13mMultiple Airlines

Sat 8/165:20 amSAT - IAD

2 stops27h 54mMultiple Airlines

Deal found 6/11

$235

Wed 9/36:00 amIAD - SAT

1 stop8h 03mDelta

Tue 9/912:41 pmSAT - IAD

1 stop9h 51mDelta

Deal found 6/11

$237

Fri 7/47:00 amIAD - SAT

1 stop7h 40mSouthwest

Thu 7/105:20 amSAT - IAD

1 stop12h 45mSouthwest

Deal found 6/11

$244

Fri 8/296:10 amIAD - SAT

1 stop11h 40mFrontier

Fri 9/55:35 pmSAT - IAD

1 stop5h 31mFrontier

Deal found 6/11

$266

Tue 9/166:25 amIAD - SAT

1 stop11h 17mAmerican Airlines

Sun 9/215:00 amSAT - IAD

1 stop4h 57mAmerican Airlines

Deal found 6/11

$306

Last-minute flights from Dulles Intl to San Antonio
Discover last-minute flight deals from Dulles Intl to San Antonio. Data last updated June 12, 2025 and is based on user searches.

Tue 6/175:50 pmIAD - SAT

1 stop6h 09mUnited Airlines

Mon 6/307:00 amSAT - IAD

Nonstop3h 24mUnited Airlines

Deal found 6/9

$324

Tue 6/177:25 amIAD - SAT

1 stop10h 25mSouthwest

Wed 6/1811:00 amSAT - IAD

1 stop6h 25mSouthwest

Deal found 6/10

$404

Tue 6/179:10 amIAD - SAT

2 stops7h 18mAmerican Airlines

Tue 6/245:00 amSAT - IAD

1 stop5h 00mAmerican Airlines

Deal found 6/12

$464

Thu 6/194:31 pmIAD - SAT

1 stop25h 12mFrontier

Mon 6/235:38 pmSAT - IAD

1 stop5h 26mFrontier

Deal found 6/11

$331

Thu 6/197:34 pmIAD - SAT

1 stop5h 43mDelta

Wed 6/255:20 amSAT - IAD

1 stop5h 13mDelta

Deal found 6/12

$354

Thu 6/198:10 amIAD - SAT

2 stops22h 30mAlaska Airlines

Wed 6/257:37 pmSAT - IAD

2 stops22h 22mAlaska Airlines

Deal found 6/10

$1,114

Sat 6/219:42 pmIAD - SAT

1 stop20h 36mMultiple Airlines

Fri 6/2710:57 pmSAT - IAD

2 stops20h 55mMultiple Airlines

Deal found 6/10

$366

Tue 7/16:35 amIAD - SAT

1 stop6h 10mUnited Airlines

Thu 7/105:56 pmSAT - IAD

1 stop5h 02mUnited Airlines

Deal found 6/10

$239

Fri 7/47:00 amIAD - SAT

1 stop7h 40mSouthwest

Thu 7/105:20 amSAT - IAD

1 stop12h 45mSouthwest

Deal found 6/11

$244

Sat 7/56:00 amIAD - SAT

1 stop5h 30mDelta

Fri 7/186:11 pmSAT - IAD

1 stop5h 23mDelta

Deal found 6/12

$253

Fri 7/116:10 amIAD - SAT

1 stop11h 42mFrontier

Fri 7/185:38 pmSAT - IAD

1 stop5h 34mFrontier

Deal found 6/11

$266

Tue 7/226:44 pmIAD - SAT

1 stop5h 27mAmerican Airlines

Sat 7/262:42 pmSAT - IAD

2 stops8h 16mAmerican Airlines

Deal found 6/11

$314

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 June 12, 2025.

Thu 8/1411:04 amIAD - SAT

1 stop7h 12mMultiple Airlines

Deal found 6/12

$91

Sun 8/315:55 pmIAD - SAT

Nonstop3h 38mUnited Airlines

Deal found 6/10

$95

Sat 9/67:00 amIAD - SAT

1 stop10h 20mSouthwest

Deal found 6/11

$96

Sun 8/316:00 amIAD - SAT

1 stop7h 34mDelta

Deal found 6/9

$119

Wed 6/257:30 amIAD - SAT

1 stop30h 33mFrontier

Deal found 6/9

$141

Wed 8/2010:25 amIAD - SAT

2 stops9h 09mAmerican Airlines

Deal found 6/12

$172

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

Sat 11/1

8:15 am-11:06 am

Nonstop3h 51m

San Antonio

Wed 11/5

7:07 am-11:19 am

Nonstop3h 12m

$231

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Sat 8/9

9:20 pm-4:33 pm

1 stop20h 13m

San Antonio

Sat 8/16

5:20 am-10:14 am

2 stops27h 54m

$235

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Wed 9/3

6:00 am-1:03 pm

1 stop8h 03m

San Antonio

Tue 9/9

12:41 pm-11:32 pm

1 stop9h 51m

$237

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Fri 7/4

7:00 am-1:40 pm

1 stop7h 40m

San Antonio

Thu 7/10

5:20 am-7:05 pm

1 stop12h 45m

$244

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Fri 8/29

6:10 am-4:50 pm

1 stop11h 40m

San Antonio

Fri 9/5

5:35 pm-12:06 am

1 stop5h 31m

$266

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Tue 9/16

6:25 am-4:42 pm

1 stop11h 17m

San Antonio

Sun 9/21

5:00 am-10:57 am

1 stop4h 57m

$306

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Tue 8/26

5:45 am-11:25 am

1 stop6h 40m

$91

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Sun 8/31

5:55 pm-8:33 pm

Nonstop3h 38m

$95

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Sat 8/16

9:15 pm-5:16 pm

1 stop21h 01m

$99

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Sun 8/31

12:39 pm-6:22 pm

1 stop6h 43m

$119

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 12 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

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 afternoon, when flights are generally more expensive, you can save up to 30% on flights from Washington, D.C. Dulles Intl Airport to San Antonio by exploring options for tickets at noon.

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).

Rainfall in San Antonio by month

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.

Temperature in San Antonio by month

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).

Reviews of airlines servicing San Antonio

Peruse reviews from past customers who have flown with Southwest, Delta and United Airlines from Washington, D.C. to San Antonio to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,287 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Southwest

8.0

Very good

4,287 reviews

Southwest

8.0

Very good

4,287 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Delta

8.0

Very good

7,950 reviews

Southwest

8.0

Very good

4,287 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

United Airlines

7.4

Good

8,790 reviews

Southwest

8.0

Very good

4,287 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,287 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Frontier

5.9

Fair

3,295 reviews

Southwest

8.0

Very good

4,287 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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 4 inbound flights from Washington, D.C. Dulles Intl per day.
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 $230. Other airlines that can offer you cheap pricing are Delta, from $237, and Southwest, from $244. You may be able to fly from Washington, D.C. Dulles Intl Airport to San Antonio for 43% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to San Antonio one-way?
One-way options have recently been found by users for as low as $95 on United Airlines. Other airlines that offer cheap prices include Southwest from $96 and Delta from $119 one-way.
What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to San Antonio?
Consider United Airlines (80%), Air Canada (79%) or Mesa Airlines (78%) 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 $181 on average our data indicates $458 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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Top 4 airlines flying from Dulles Intl to San Antonio

Airline	Cheapest	Average	Flexibility	On-time
Southwest	Cheapest$196	Average$347	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$218	Average$298	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$242	Average$338	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$249	Average$423	FlexibilityNo cancel fee	On-time69%

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$91+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Dulles Intl to San Antonio with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 Thursday and return on a Thursday

Cheap flight deals from Dulles Intl to San Antonio

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Dulles Intl to San Antonio

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 June 12, 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 June 12, 2025.

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.

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

SAT

Our travel experts

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?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to San Antonio. Price data was last updated on June 9, 2025.

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

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

Find hourly flight availability from Dulles Intl to San Antonio. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

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

Rainfall in San Antonio by month

Plan your trip to San Antonio by taking into account the average rainfall totals by month.

Temperature in San Antonio by month

Plan your trip to San Antonio by taking into account the average temperature totals by month.

Reviews of airlines servicing San Antonio

Peruse reviews from past customers who have flown with Southwest, Delta and United Airlines from Washington, D.C. to San Antonio to help guide your decision. Users have also rated airlines 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.

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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 June 12, 2025.