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$146+ 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 5/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SAT
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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The best prices from Washington, D.C. Dulles Intl to San Antonio are usually found in January or August, booked 57 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

Cheap flight deals from Dulles Intl to San Antonio

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to San Antonio (SAT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$269
(Delta)

One-way from

$146
(United Airlines)

Popular in

March

Cheapest in

January

Average price

$349

Good round-trip deal

$337 or less

Good one-way deal

$273 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-San Antonio flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-San Antonio flights.
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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. 1% potential increase in price ($8 potential increase over avg. RT price).
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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 January 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 January 21, 2025.

This Delta deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/206:59 pmIAD - SAT
1 stop6h 28mDelta
Mon 2/246:31 pmSAT - IAD
1 stop4h 49mDelta
Deal found 1/20$269
This United Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/286:00 amIAD - SAT
1 stop8h 27mUnited Airlines
Tue 3/47:44 amSAT - IAD
Nonstop3h 11mUnited Airlines
Deal found 1/21$271
This Southwest deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/267:05 amIAD - SAT
2 stops9h 55mSouthwest
Tue 4/15:40 amSAT - IAD
1 stop8h 20mSouthwest
Deal found 1/21$279
This Booking.com deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/286:03 pmIAD - SAT
1 stop26h 11mFrontier
Sun 3/27:50 pmSAT - IAD
1 stop20h 23mFrontier
Deal found 1/20$290
This American Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/81:52 pmIAD - SAT
1 stop7h 18mAmerican Airlines
Sat 2/156:57 amSAT - IAD
2 stops8h 04mAmerican Airlines
Deal found 1/20$314
This Mytrip deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/88:25 amIAD - SAT
3 stops25h 38mMultiple Airlines
Thu 3/1310:58 amSAT - IAD
3 stops28h 17mMultiple Airlines
Deal found 1/20$373

Find flights from Dulles Intl to San Antonio within your budget

Customize your flight search to find flights from Dulles Intl to San Antonio that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Thu 2/20

3:05 pm-11:02 pm

1 stop8h 57m

San Antonio

Thu 2/27

11:30 am-6:55 pm

1 stop6h 25m

$269

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Thu 2/13

5:30 pm-11:15 pm

1 stop6h 45m

San Antonio

Tue 2/18

12:11 pm-4:22 pm

Nonstop3h 11m

$286

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Fri 2/28

6:03 pm-7:14 pm

1 stop26h 11m

San Antonio

Sun 3/2

7:50 pm-5:13 pm

1 stop20h 23m

$290

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Tue 3/11

3:40 pm-11:25 pm

1 stop8h 45m

San Antonio

Fri 3/14

5:20 am-2:50 pm

1 stop8h 30m

$294

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Thu 2/13

4:35 pm-10:31 pm

1 stop6h 56m

San Antonio

Sun 2/16

6:39 am-1:18 pm

1 stop5h 39m

$309

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Sat 3/8

8:25 am-9:03 am

3 stops25h 38m

San Antonio

Thu 3/13

10:58 am-4:15 pm

3 stops28h 17m

$373

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Thu 5/1

5:26 pm-8:18 pm

1 stop27h 52m

$146

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Fri 2/7

6:59 pm-12:27 am

1 stop6h 28m

$155

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Wed 3/5

12:55 pm-10:03 am

3 stops22h 08m

$158

Washington, D.C.San Antonio

IAD - SAT

IADSAT

Washington, D.C. Dulles Intl

Mon 3/17

5:30 pm-1:10 am

1 stop8h 40m

$175

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 13 results
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Compare providers for flights from Dulles Intl to San Antonio

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 Dulles Intl to San Antonio in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 starsTrust 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 Washington, D.C. Dulles Intl Airport-San Antonio flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-San Antonio flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-San Antonio flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-San Antonio 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 Washington, D.C. Dulles Intl Airport-San Antonio flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

Travel insights for flights from Dulles Intl to San Antonio

Get recent, data-driven insights about flights from Dulles Intl to San Antonio including ideal travel times, pricing trends, and more.

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 January 17, 2025.

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?

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 January 21, 2025.

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.

Rainfall in San Antonio by month

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

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

Get insights into the airlines that provide service to San Antonio. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Antonio. Reviews last updated January 21, 2025.
Peruse reviews from past customers who have flown with United Airlines, Southwest and Delta 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
8.1
Very good
4,662 reviews

Entertainment

7.7

Overall

8.1

Food

7.2

Crew

8.7

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,662 reviews
Southwest
8.1
Very good
4,662 reviews

Entertainment

7.7

Overall

8.1

Food

7.2

Crew

8.7

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,706 reviews
Southwest
8.1
Very good
4,662 reviews

Entertainment

7.7

Overall

8.1

Food

7.2

Crew

8.7

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,521 reviews
Southwest
8.1
Very good
4,662 reviews

Entertainment

7.7

Overall

8.1

Food

7.2

Crew

8.7

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,984 reviews
Southwest
8.1
Very good
4,662 reviews

Entertainment

7.7

Overall

8.1

Food

7.2

Crew

8.7

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,662 reviews

Entertainment

7.7

Overall

8.1

Food

7.2

Crew

8.7

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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?

    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. 3 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 $269. Other airlines that can offer you cheap pricing are United Airlines, from $271, and Southwest, from $279. You may be able to fly from Washington, D.C. Dulles Intl Airport to San Antonio for 32% 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 $146 on United Airlines. Other airlines that offer cheap prices include Delta from $155 and Southwest from $175 one-way.

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

    Consider Air Canada (82%), United Airlines (79%) or Brussels Airlines (75%) 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 $198. While the most popular route (Washington, D.C. Dulles Intl - San Antonio) can be booked for $179 on average our data indicates $652 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

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
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Alternative routes for Dulles Intl to San Antonio

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Dulles Intl to San Antonio

Discover the top 3 airlines that operate flights from Dulles Intl to San Antonio. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$218Average$336FlexibilityNo cancel feeOn-time71%
DeltaCheapest$247Average$355FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$254Average$424FlexibilityNo cancel feeOn-time69%
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