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

Currently priced at $214, 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 Delta and Frontier - these airlines can fly you to your destination from $251 and $271, respectively. Users have found that United Airlines is 45% 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 $109 on Frontier. Other airlines that offer cheap prices include United Airlines from $113 and Delta from $126 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. Tuesday 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 $984, our data shows the cheapest flight currently is $129. When looking at the most popular route, (San Antonio - Washington, D.C. Dulles Intl), you can expect to pay $231 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 (89%), Brussels Airlines (80%), United Airlines (80%).

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 69% 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 $339 per person but you can even find prices for as low as $179. The most expensive prices can be found in the month of November. Opting for a August flight can save you 17% 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 6 outbound flights to Washington, D.C. Dulles Intl per day. 4 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.

$109+ Flights from San Antonio to Washington, D.C. Dulles Intl Airport

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1. Tell us where you want to go

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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We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

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Cheapflights Tip: The best prices from San Antonio to Washington, D.C. Dulles Intl are usually found in February or April, 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	$214 (United Airlines)
One-way from	$109 (Trip.com)
Popular in	March
Cheapest in	February
Average price	$347
Good round-trip deal	$379 or less
Good one-way deal	$214 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, 4% potential price rise

Search Deals

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

Search Deals

Average for round-trip flights in April 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 April 11, 2025.

Thu 5/297:15 amSAT - IAD

Nonstop3h 21mUnited Airlines

Mon 6/28:30 amIAD - SAT

Nonstop3h 30mUnited Airlines

Deal found 4/10

$214

Sat 5/36:25 pmSAT - IAD

1 stop5h 00mDelta

Tue 5/137:05 amIAD - SAT

1 stop5h 08mDelta

Deal found 4/11

$251

Fri 4/257:59 pmSAT - IAD

1 stop19h 36mFrontier

Sun 4/275:25 pmIAD - SAT

1 stop26h 34mFrontier

Deal found 4/10

$271

Mon 5/58:00 amSAT - IAD

1 stop8h 55mSouthwest

Wed 5/77:50 amIAD - SAT

2 stops10h 55mSouthwest

Deal found 4/10

$294

Thu 4/242:28 pmSAT - IAD

1 stop7h 14mAmerican Airlines

Sat 4/265:00 amIAD - SAT

2 stops9h 38mAmerican Airlines

Deal found 4/10

$314

Fri 6/610:51 pmSAT - IAD

2 stops14h 41mMultiple Airlines

Sun 6/811:52 amIAD - SAT

1 stop6h 16mMultiple Airlines

Deal found 4/10

$338

Thu 5/16:35 amSAT - IAD

2 stops22h 05mAlaska Airlines

Mon 5/125:00 pmIAD - SAT

2 stops26h 37mAlaska Airlines

Deal found 4/10

$533

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 April 11, 2025.

Thu 5/297:15 amSAT - IAD

Nonstop3h 21mUnited Airlines

Mon 6/28:30 amIAD - SAT

Nonstop3h 30mUnited Airlines

Deal found 4/10

$214

Tue 6/175:25 amSAT - IAD

1 stop8h 11mDelta

Tue 6/245:24 pmIAD - SAT

1 stop5h 47mDelta

Deal found 4/10

$251

Fri 4/257:59 pmSAT - IAD

1 stop19h 36mFrontier

Sun 4/275:25 pmIAD - SAT

1 stop26h 34mFrontier

Deal found 4/10

$271

Mon 5/58:00 amSAT - IAD

1 stop8h 55mSouthwest

Wed 5/77:50 amIAD - SAT

2 stops10h 55mSouthwest

Deal found 4/10

$294

Thu 4/242:28 pmSAT - IAD

1 stop7h 14mAmerican Airlines

Sat 4/265:00 amIAD - SAT

2 stops9h 38mAmerican Airlines

Deal found 4/10

$314

Fri 6/610:51 pmSAT - IAD

2 stops14h 41mMultiple Airlines

Sun 6/811:52 amIAD - SAT

1 stop6h 16mMultiple Airlines

Deal found 4/10

$338

Thu 5/16:35 amSAT - IAD

2 stops22h 05mAlaska Airlines

Mon 5/125:00 pmIAD - SAT

2 stops26h 37mAlaska Airlines

Deal found 4/10

$533

Last-minute flights from San Antonio to Dulles Intl
Discover last-minute flight deals from San Antonio to Dulles Intl. Data last updated April 11, 2025 and is based on user searches.

Tue 4/156:05 amSAT - IAD

1 stop7h 00mSouthwest

Tue 4/222:50 pmIAD - SAT

1 stop8h 35mSouthwest

Deal found 4/10

$459

Thu 4/175:30 amSAT - IAD

1 stop4h 53mDelta

Sat 4/196:00 amIAD - SAT

1 stop7h 34mDelta

Deal found 4/10

$328

Thu 4/179:13 amSAT - IAD

1 stop6h 49mFrontier

Sat 4/1912:48 pmIAD - SAT

1 stop20h 25mFrontier

Deal found 4/10

$330

Thu 4/174:45 pmSAT - IAD

Nonstop3h 29mUnited Airlines

Sat 4/195:50 pmIAD - SAT

Nonstop3h 44mUnited Airlines

Deal found 4/10

$359

Thu 4/175:00 amSAT - IAD

2 stops7h 42mAmerican Airlines

Mon 4/215:13 pmIAD - SAT

1 stop7h 45mAmerican Airlines

Deal found 4/10

$404

Thu 4/1710:09 amSAT - IAD

3 stops25h 14mMultiple Airlines

Sat 4/198:25 amIAD - SAT

3 stops36h 09mMultiple Airlines

Deal found 4/10

$582

Fri 4/187:00 amSAT - IAD

1 stop21h 34mAlaska Airlines

Mon 4/217:00 amIAD - SAT

2 stops23h 15mAlaska Airlines

Deal found 4/9

$1,205

Thu 4/242:28 pmSAT - IAD

1 stop7h 14mAmerican Airlines

Mon 4/284:52 pmIAD - SAT

2 stops8h 06mAmerican Airlines

Deal found 4/10

$314

Fri 4/257:59 pmSAT - IAD

1 stop19h 36mFrontier

Sun 4/275:25 pmIAD - SAT

1 stop26h 34mFrontier

Deal found 4/10

$271

Thu 5/16:35 amSAT - IAD

2 stops22h 05mAlaska Airlines

Mon 5/125:00 pmIAD - SAT

2 stops26h 37mAlaska Airlines

Deal found 4/10

$533

Sat 5/35:30 amSAT - IAD

1 stop4h 53mDelta

Tue 5/66:00 amIAD - SAT

1 stop5h 45mDelta

Deal found 4/10

$251

Mon 5/58:00 amSAT - IAD

1 stop8h 55mSouthwest

Wed 5/77:50 amIAD - SAT

2 stops10h 55mSouthwest

Deal found 4/10

$294

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 April 11, 2025.

Wed 6/412:19 pmSAT - IAD

1 stop9h 13mFrontier

Deal found 4/10

$109

Sun 5/257:15 amSAT - IAD

Nonstop3h 21mUnited Airlines

Deal found 4/10

$113

Sat 5/106:33 amSAT - IAD

1 stop7h 04mDelta

Deal found 4/10

$126

Sun 8/36:55 amSAT - IAD

1 stop11h 15mSouthwest

Deal found 4/10

$140

Wed 6/112:37 pmSAT - IAD

2 stops19h 25mMultiple Airlines

Deal found 4/10

$151

Sat 5/106:00 amSAT - IAD

2 stops9h 56mAmerican Airlines

Deal found 4/10

$165

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

Thu 5/29

7:15 am-11:36 am

Nonstop3h 21m

Washington, D.C. Dulles Intl

Mon 6/2

8:30 am-11:00 am

Nonstop3h 30m

$214

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Sat 5/3

5:30 am-11:23 am

1 stop4h 53m

Washington, D.C. Dulles Intl

Tue 5/6

6:00 am-10:45 am

1 stop5h 45m

$251

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Fri 4/25

7:59 pm-4:35 pm

1 stop19h 36m

Washington, D.C. Dulles Intl

Sun 4/27

5:25 pm-6:59 pm

1 stop26h 34m

$271

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Mon 5/5

8:00 am-5:55 pm

1 stop8h 55m

Washington, D.C. Dulles Intl

Wed 5/7

7:50 am-5:45 pm

2 stops10h 55m

$294

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Thu 4/24

2:28 pm-10:42 pm

1 stop7h 14m

Washington, D.C. Dulles Intl

Mon 4/28

4:52 pm-11:58 pm

2 stops8h 06m

$314

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Fri 6/6

10:51 pm-2:32 pm

2 stops14h 41m

Washington, D.C. Dulles Intl

Sun 6/8

11:52 am-5:08 pm

1 stop6h 16m

$338

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Thu 5/1

6:35 am-5:40 am

2 stops22h 05m

Washington, D.C. Dulles Intl

Mon 5/12

5:00 pm-6:37 pm

2 stops26h 37m

$533

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Wed 6/4

12:19 pm-10:32 pm

1 stop9h 13m

$109

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Sun 5/25

7:15 am-11:36 am

Nonstop3h 21m

$113

San AntonioWashington, D.C.

SAT - IAD

SATIAD

San Antonio

Sat 5/10

6:25 am-1:26 pm

1 stop6h 01m

$126

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/10

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 April.

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 $383). 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 72% on airfare.

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

The most flights from SAT to IAD are scheduled on a Monday (8 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).

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

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Alaska Airlines

8.0

Very good

9,851 reviews

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Southwest

8.0

Very good

4,279 reviews

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Delta

8.0

Very good

7,911 reviews

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

United Airlines

7.4

Good

8,636 reviews

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,851 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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 6 outbound flights to Washington, D.C. Dulles Intl per day. 4 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 $214, 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 Delta and Frontier - these airlines can fly you to your destination from $251 and $271, respectively. Users have found that United Airlines is 45% 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 $109 on Frontier. Other airlines that offer cheap prices include United Airlines from $113 and Delta from $126 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 (89%), Brussels Airlines (80%), United Airlines (80%).
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 $984, our data shows the cheapest flight currently is $129. When looking at the most popular route, (San Antonio - Washington, D.C. Dulles Intl), you can expect to pay $231 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 $383). 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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Browse thousands of different options on Cheapflights for your next trip

Top 4 airlines flying from San Antonio to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Southwest	Cheapest$204	Average$273	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$218	Average$334	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$236	Average$335	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$242	Average$414	FlexibilityNo cancel fee	On-time69%

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$109+ 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 6/4. 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 April, 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 April 11, 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 April 11, 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 April.

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

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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.

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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 April 4, 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 April 11, 2025.

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

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 4 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 April 11, 2025.