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

Currently priced at $192, United Airlines will fly you from San Antonio to Washington, D.C. Dulles Intl Airport and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Southwest and Delta - these airlines can fly you to your destination from $199 and $237, respectively. Users have found that United Airlines is 51% cheaper than the other options available to this destination.

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

One-way options have recently been found by users for as low as $100 on Southwest. Other airlines that offer cheap prices include United Airlines from $106 and Delta from $119 one-way.

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

Travelers seeking maximum savings on their San Antonio to Washington, D.C. Dulles Intl Airport 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.

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

While on average a flight from San Antonio to Washington, D.C. Dulles Intl Airport is generally $1,967, our data shows the cheapest flight currently is $168. When looking at the most popular route, (San Antonio - Washington, D.C. Dulles Intl), you can expect to pay $179 for that flight.

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

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from San Antonio to Washington, D.C. Dulles Intl Airport on time: Air Canada (84%), Brussels Airlines (75%), Lufthansa (75%).

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

The most popular airlines flying from San Antonio to Washington, D.C. Dulles Intl Airport are American Airlines, Delta and United Airlines. Something to consider prior to booking your flight.

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

Travelers have found that booking a Wednesday departure is the best way to save up to 71% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

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

August is one of the best times of the year to fly to Washington, D.C. Dulles Intl Airport from San Antonio. Prices for August average $345 per person but you can even find prices for as low as $180. The most expensive prices can be found in the month of November. Opting for a August flight can save you 15% on your journey compared to booking in November

Most accurate provider : When it comes to deals on San Antonio-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Antonio-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Antonio-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on San Antonio-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Antonio-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

For a flight from San Antonio to Washington, D.C. Dulles Intl, you will be flying from San Antonio. San Antonio (SAT) is just 7.6 mi from the center of the city. San Antonio is the only San Antonio airport and it handles 5 outbound flights to Washington, D.C. Dulles Intl per day. 3 airlines have flights to Washington, D.C. Dulles Intl from San Antonio on a regular basis.

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

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

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

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

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

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

$100+ Flights from San Antonio to Washington, D.C. Dulles Intl Airport

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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 San Antonio to Washington, D.C. Dulles Intl are usually found in February or October, booked 83 days in advance, depart on a Thursday or Friday and return on a Wednesday

Cheap flight deals from San Antonio to Dulles Intl

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$192 (United Airlines)
One-way from	$100 (Southwest)
Popular in	March
Cheapest in	February
Average price	$473
Good round-trip deal	$485 or less
Good one-way deal	$289 or less

Provider with most accurate pricing for San Antonio-Washington, D.C. Dulles Intl flight deals.

Search Deals

Provider most trusted by Cheapflights users for San Antonio-Washington, D.C. Dulles Intl flights.

Search Deals

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

Search Deals

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

Search Deals

High demand for flights, 2% potential price rise

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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).

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Average for round-trip flights in March 2025

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

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

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Find flight deals from San Antonio to Dulles Intl

Cheapest flights from San Antonio to Dulles Intl
Explore the most affordable flight options available from San Antonio to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

Sat 5/107:34 amSAT - IAD

Nonstop3h 19mUnited Airlines

Sat 5/178:22 amIAD - SAT

Nonstop3h 56mUnited Airlines

Deal found 3/24

$192

Sat 5/37:40 amSAT - IAD

1 stop8h 10mSouthwest

Wed 5/77:50 amIAD - SAT

1 stop9h 15mSouthwest

Deal found 3/24

$199

Sat 8/165:30 amSAT - IAD

1 stop7h 29mDelta

Tue 8/266:10 amIAD - SAT

1 stop5h 52mDelta

Deal found 3/24

$236

Sun 5/1810:52 amSAT - IAD

1 stop28h 44mFrontier

Sun 6/11:34 pmIAD - SAT

1 stop20h 47mFrontier

Deal found 3/24

$300

Thu 4/246:06 pmSAT - IAD

1 stop4h 50mAmerican Airlines

Sat 4/262:12 pmIAD - SAT

2 stops7h 38mAmerican Airlines

Deal found 3/24

$312

Thu 5/82:55 pmSAT - IAD

2 stops29h 02mMultiple Airlines

Sun 5/1112:55 pmIAD - SAT

3 stops34h 56mMultiple Airlines

Deal found 3/24

$357

Best flights from San Antonio to Dulles Intl
Discover carefully curated flight deals from San Antonio to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 25, 2025.

Sat 5/107:34 amSAT - IAD

Nonstop3h 19mUnited Airlines

Sat 5/178:22 amIAD - SAT

Nonstop3h 56mUnited Airlines

Deal found 3/24

$192

Sat 5/37:40 amSAT - IAD

1 stop8h 10mSouthwest

Wed 5/77:50 amIAD - SAT

1 stop9h 15mSouthwest

Deal found 3/24

$199

Sat 5/33:30 pmSAT - IAD

1 stop6h 37mDelta

Wed 5/147:05 amIAD - SAT

1 stop5h 08mDelta

Deal found 3/23

$237

Sun 5/1810:52 amSAT - IAD

1 stop28h 44mFrontier

Sun 6/11:34 pmIAD - SAT

1 stop20h 47mFrontier

Deal found 3/24

$300

Thu 4/246:06 pmSAT - IAD

1 stop4h 50mAmerican Airlines

Sat 4/262:12 pmIAD - SAT

2 stops7h 38mAmerican Airlines

Deal found 3/24

$312

Thu 5/82:55 pmSAT - IAD

2 stops29h 02mMultiple Airlines

Sun 5/1112:55 pmIAD - SAT

3 stops34h 56mMultiple Airlines

Deal found 3/24

$357

Tue 5/136:35 amSAT - IAD

1 stop16h 23mAlaska Airlines

Tue 5/207:15 amIAD - SAT

2 stops22h 55mAlaska Airlines

Deal found 3/24

$528

Last-minute flights from San Antonio to Dulles Intl
Discover last-minute flight deals from San Antonio to Dulles Intl. Data last updated March 25, 2025 and is based on user searches.

Mon 3/311:45 pmSAT - IAD

1 stop6h 39mDelta

Tue 4/155:32 pmIAD - SAT

1 stop7h 58mDelta

Deal found 3/24

$308

Mon 3/317:15 amSAT - IAD

Nonstop3h 18mUnited Airlines

Tue 4/1512:55 pmIAD - SAT

Nonstop3h 52mUnited Airlines

Deal found 3/24

$389

Wed 4/26:38 amSAT - IAD

1 stop5h 44mAmerican Airlines

Sat 4/59:10 amIAD - SAT

2 stops9h 22mAmerican Airlines

Deal found 3/24

$356

Wed 4/27:00 amSAT - IAD

1 stop21h 34mAlaska Airlines

Tue 4/87:00 amIAD - SAT

2 stops23h 40mAlaska Airlines

Deal found 3/24

$1,075

Thu 4/35:20 amSAT - IAD

1 stop8h 30mSouthwest

Sun 4/135:15 amIAD - SAT

1 stop9h 20mSouthwest

Deal found 3/24

$539

Thu 4/310:58 amSAT - IAD

3 stops24h 36mMultiple Airlines

Sun 4/1311:51 amIAD - SAT

3 stops22h 23mMultiple Airlines

Deal found 3/24

$660

Thu 4/2412:05 pmSAT - IAD

Nonstop3h 20mUnited Airlines

Sat 4/265:50 pmIAD - SAT

Nonstop3h 44mUnited Airlines

Deal found 3/24

$208

Thu 4/245:30 amSAT - IAD

1 stop11h 25mSouthwest

Sat 4/265:05 amIAD - SAT

1 stop7h 00mSouthwest

Deal found 3/24

$229

Thu 4/246:06 pmSAT - IAD

1 stop4h 50mAmerican Airlines

Sat 4/262:12 pmIAD - SAT

2 stops7h 38mAmerican Airlines

Deal found 3/24

$312

Tue 4/294:48 pmSAT - IAD

1 stop5h 19mDelta

Sat 5/176:00 pmIAD - SAT

1 stop7h 21mDelta

Deal found 3/24

$237

Wed 4/307:00 amSAT - IAD

2 stops27h 47mMultiple Airlines

Sat 5/38:25 amIAD - SAT

3 stops32h 43mMultiple Airlines

Deal found 3/24

$383

One-way flights from San Antonio to Dulles Intl
Search for one-way flight options from San Antonio to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated March 25, 2025.

Tue 4/296:05 amSAT - IAD

1 stop7h 00mSouthwest

Deal found 3/24

$100

Sat 6/712:02 pmSAT - IAD

Nonstop3h 22mUnited Airlines

Deal found 3/24

$106

Wed 4/2312:22 pmSAT - IAD

1 stop6h 31mDelta

Deal found 3/24

$119

Wed 5/217:05 amSAT - IAD

2 stops26h 59mMultiple Airlines

Deal found 3/23

$141

Tue 4/228:28 amSAT - IAD

1 stop6h 54mAmerican Airlines

Deal found 3/24

$154

Sun 6/13:51 pmSAT - IAD

1 stop13h 07mFrontier

Deal found 3/24

$155

Thu 6/126:35 pmSAT - IAD

1 stop16h 50mSun Country Air

Deal found 3/24

$166

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Sat 5/10

7:34 am-11:53 am

Nonstop3h 19m

Washington, D.C. Dulles Intl

Sat 5/17

8:22 am-11:18 am

Nonstop3h 56m

$192

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Sat 5/3

7:40 am-4:50 pm

1 stop8h 10m

Washington, D.C. Dulles Intl

Wed 5/7

7:50 am-4:05 pm

1 stop9h 15m

$199

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Sat 8/16

5:30 am-1:59 pm

1 stop7h 29m

Washington, D.C. Dulles Intl

Tue 8/26

6:10 am-11:02 am

1 stop5h 52m

$236

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Sun 5/18

10:52 am-4:36 pm

1 stop28h 44m

Washington, D.C. Dulles Intl

Sun 6/1

1:34 pm-9:21 am

1 stop20h 47m

$300

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Thu 4/24

6:06 pm-11:56 pm

1 stop4h 50m

Washington, D.C. Dulles Intl

Sat 4/26

2:12 pm-8:50 pm

2 stops7h 38m

$312

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Thu 5/8

2:55 pm-8:57 pm

2 stops29h 02m

Washington, D.C. Dulles Intl

Sun 5/11

12:55 pm-10:51 pm

3 stops34h 56m

$357

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Tue 4/29

6:05 am-2:05 pm

1 stop7h 00m

$100

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Sat 6/7

12:02 pm-4:24 pm

Nonstop3h 22m

$106

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Wed 4/23

12:22 pm-7:53 pm

1 stop6h 31m

$119

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Wed 5/21

7:05 am-11:04 am

2 stops26h 59m

$141

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 13 results

Compare providers for flights from San Antonio to Dulles Intl

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Antonio to Dulles Intl in March.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	Trust Score*3 stars
CheapTicketsDeal	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on San Antonio-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Antonio-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Antonio-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on San Antonio-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Antonio-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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

Airports

SAT

For quick access, use the new seven-story parking garage or opt for economy lots with shuttle service for longer trips.

IAD

The Washington Metro Silver line reaches IAD in under 40 minutes, offering a cheap and convenient city connection.

Our travel experts

Ramsey Qubein

Expert on SAT and IAD

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

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

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

The best time to book flights from San Antonio to Washington, D.C. Dulles Intl Airport is 83 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 San Antonio to Washington, D.C. Dulles Intl Airport?

Currently, August is the cheapest month in which you can book a flight from San Antonio to Washington, D.C. Dulles Intl Airport (average of $309). Flying from San Antonio to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $387). 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 SAT to IAD?

One of the essential ways to save on airfare from San Antonio to Washington, D.C. Dulles Intl Airport is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at noon could potentially save you up to 74% on airfare.

Rainfall in Dulles Intl by month

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

Temperature in Dulles Intl by month

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Dulles Intl

See what other customers who have flown with Alaska Airlines, Southwest and Delta from San Antonio to Washington, D.C. have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,782 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines

8.0

Very good

9,782 reviews

Alaska Airlines

8.0

Very good

9,782 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Southwest

8.0

Very good

4,272 reviews

Alaska Airlines

8.0

Very good

9,782 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta

8.0

Very good

7,890 reviews

Alaska Airlines

8.0

Very good

9,782 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

United Airlines

7.4

Good

8,605 reviews

Alaska Airlines

8.0

Very good

9,782 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,782 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

What airport do you fly from for flights from San Antonio to Washington, D.C. Dulles Intl?
For a flight from San Antonio to Washington, D.C. Dulles Intl, you will be flying from San Antonio. San Antonio (SAT) is just 7.6 mi from the center of the city. San Antonio is the only San Antonio airport and it handles 5 outbound flights to Washington, D.C. Dulles Intl per day. 3 airlines have flights to Washington, D.C. Dulles Intl from San Antonio on a regular basis.
What are the cheapest airlines flying from San Antonio to Washington, D.C. Dulles Intl Airport round-trip?
Currently priced at $192, United Airlines will fly you from San Antonio to Washington, D.C. Dulles Intl Airport and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Southwest and Delta - these airlines can fly you to your destination from $199 and $237, respectively. Users have found that United Airlines is 51% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from San Antonio to Washington, D.C. Dulles Intl Airport one-way?
One-way options have recently been found by users for as low as $100 on Southwest. Other airlines that offer cheap prices include United Airlines from $106 and Delta from $119 one-way.
What are the most reliable airlines from San Antonio to Washington, D.C. Dulles Intl Airport?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from San Antonio to Washington, D.C. Dulles Intl Airport on time: Air Canada (84%), Brussels Airlines (75%), Lufthansa (75%).
What are the cheapest flights from San Antonio to Washington, D.C. Dulles Intl Airport?
While on average a flight from San Antonio to Washington, D.C. Dulles Intl Airport is generally $1,967, our data shows the cheapest flight currently is $168. When looking at the most popular route, (San Antonio - Washington, D.C. Dulles Intl), you can expect to pay $179 for that flight.
Can I find deals for flights from San Antonio to Dulles Intl that include hotel bookings?
Yes. In addition to deals on San Antonio to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from San Antonio to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Antonio to Dulles Intl.
Can I find deals for business class flights from San Antonio to Dulles Intl?
Yes. Cheapflights offers flight deals from San Antonio to Dulles Intl 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 San Antonio to Washington, D.C. Dulles Intl Airport?
Currently, August is the cheapest month in which you can book a flight from San Antonio to Washington, D.C. Dulles Intl Airport (average of $309). Flying from San Antonio to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $387). 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.

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Top 3 airlines flying from San Antonio to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$218	Average$342	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$234	Average$339	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$235	Average$416	FlexibilityNo cancel fee	On-time69%

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$100+ Cheap flights from San Antonio (SAT) to Dulles Intl (IAD)

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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from San Antonio to Dulles Intl 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 San Antonio to Washington, D.C. Dulles Intl are usually found in February or October, booked 83 days in advance, depart on a Thursday or Friday and return on a Wednesday

Cheap flight deals from San Antonio to Dulles Intl

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from San Antonio to Dulles Intl

Cheapest flights from San Antonio to Dulles IntlExplore the most affordable flight options available from San Antonio to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

Explore the most affordable flight options available from San Antonio to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

Cheapflights Fare Finder

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

Compare providers for flights from San Antonio to Dulles Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Antonio to Dulles Intl in March.

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

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

Airports

SAT

IAD

Our travel experts

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

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

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a round-trip flight from San Antonio to Dulles Intl. Price data was last updated on March 21, 2025.

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

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

Find hourly flight availability from San Antonio to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 25, 2025.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

Reviews of airlines servicing Dulles Intl

See what other customers who have flown with Alaska Airlines, Southwest and Delta from San Antonio to Washington, D.C. have to say. Users can see the overall rating for each airline as well as how each is rated 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 San Antonio to Dulles Intl. 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 from for flights from San Antonio to Washington, D.C. Dulles Intl?

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

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

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

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

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

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

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

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

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Alternative routes for San Antonio to Dulles Intl

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Top 3 airlines flying from San Antonio to Dulles Intl

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Cheapest flights from San Antonio to Dulles Intl
Explore the most affordable flight options available from San Antonio to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.