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$73+ Cheap flights from Dulles Intl (IAD) to Houston

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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — HOU
Dec 4 — Dec 111
Thu 12/4
Thu 12/11
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Houston are usually found in October or May, booked 61 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Find flight deals from Dulles Intl to Houston

Cheapest flights from Dulles Intl to Houston
Explore the most affordable flight options available from Dulles Intl to Houston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 4, 2025.

This CheapOair deal was found by Cheapflights users on 11/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/59:20 pmIAD - IAH
1 stop22h 09mFrontier
Sun 12/78:01 amIAH - IAD
1 stop11h 23mFrontier
Deal found 11/2$138
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/164:04 pmIAD - IAH
1 stop19h 03mFrontier
Thu 12/45:02 pmIAH - IAD
1 stop5h 08mFrontier
Deal found 11/2$141
This CheapOair deal was found by Cheapflights users on 11/4. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/69:20 pmIAD - IAH
1 stop10h 46mFrontier
Sun 12/146:05 amIAH - IAD
1 stop9h 19mFrontier
Deal found 11/4$142
This CheapOair deal was found by Cheapflights users on 11/4. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/215:26 pmIAD - IAH
1 stop14h 10mFrontier
Mon 11/245:46 pmIAH - IAD
1 stop12h 59mFrontier
Deal found 11/4$144
This Frontier deal was found by Cheapflights users on 11/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/45:45 amIAD - IAH
1 stop11h 25mFrontier
Sun 12/76:05 amIAH - IAD
1 stop9h 19mFrontier
Deal found 11/2$146
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/39:00 amIAD - IAH
1 stop9h 26mMultiple Airlines
Fri 12/124:06 pmIAH - IAD
1 stop5h 59mMultiple Airlines
Deal found 11/2$150
This Trip.com deal was found by Cheapflights users on 11/2. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/206:55 amIAD - IAH
1 stop10h 26mFrontier
Thu 11/277:50 amIAH - IAD
1 stop7h 41mFrontier
Deal found 11/2$151
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/108:36 pmIAD - IAH
1 stop13h 57mFrontier
Sat 11/151:02 pmIAH - IAD
1 stop9h 53mFrontier
Deal found 11/1$154
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/238:44 amIAD - IAH
1 stop9h 35mFrontier
Thu 12/45:02 pmIAH - IAD
1 stop5h 08mFrontier
Deal found 11/2$155
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:01 pmIAD - IAH
1 stop14h 24mMultiple Airlines
Sun 1/116:05 pmIAH - IAD
1 stop16h 33mMultiple Airlines
Deal found 11/2$156
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/248:40 amIAD - IAH
1 stop9h 10mMultiple Airlines
Tue 12/28:54 pmIAH - IAD
1 stop16h 35mMultiple Airlines
Deal found 11/3$157
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/238:44 amIAD - IAH
1 stop6h 56mMultiple Airlines
Wed 12/37:59 amIAH - IAD
1 stop5h 30mMultiple Airlines
Deal found 11/3$158

Cheap flight deals from Dulles Intl to Houston

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Houston (HO1). 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 November 4, 2025.

Round-trip from

$138
(CheapOair)

One-way from

$73
(CheapOair)

Popular in

December

Cheapest in

October

Average price

$357
From Washington, D.C. Dulles Intl to Houston
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Houston
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($8 potential increase over avg. RT price).
Search Deals
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 November 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Houston 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 November 4, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Houston that are best for you.

Fly from

Dulles Intl

Fly to

Houston

Route

Depart

Return

Price

Washington, D.C.Houston

IAD - HOU

IADHOU

Washington, D.C. Dulles Intl

Thu 1/15

12:09 pm-10:35 pm

1 stop11h 26m

Houston Hobby

Wed 1/21

5:35 am-8:47 pm

1 stop14h 12m

$345

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Sat 1/17

5:45 pm-8:33 pm

Nonstop3h 48m

Houston George Bush Intcntl

Tue 1/20

6:20 pm-10:18 pm

Nonstop2h 58m

$347

Washington, D.C.Houston

IAD - HOU

IADHOU

Washington, D.C. Dulles Intl

Sat 1/17

8:00 am-10:35 pm

1 stop15h 35m

Houston Hobby

Mon 1/19

5:35 am-8:47 pm

1 stop14h 12m

$347

Washington, D.C.Houston

IAD - HOU

IADHOU

Washington, D.C. Dulles Intl

Tue 12/2

5:59 pm-10:48 pm

1 stop5h 49m

Houston Hobby

Tue 12/9

10:39 am-5:00 pm

1 stop5h 21m

$349

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Thu 12/11

5:59 pm-11:59 pm

1 stop7h 00m

Houston George Bush Intcntl

Tue 12/16

4:28 pm-12:12 am

1 stop6h 44m

$349

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Thu 12/25

10:15 pm-12:57 am

Nonstop3h 42m

Houston George Bush Intcntl

Tue 12/30

7:50 pm-11:49 pm

Nonstop2h 59m

$351

Washington, D.C.Houston

IAD - HOU

IADHOU

Washington, D.C. Dulles Intl

Sat 1/17

6:20 am-10:21 am

1 stop5h 01m

Houston Hobby

Tue 1/20

5:35 am-11:44 am

1 stop5h 09m

$367

Washington, D.C.Houston

IAD - HOU

IADHOU

Washington, D.C. Dulles Intl

Sun 1/18

5:59 pm-10:35 pm

1 stop5h 36m

Houston Hobby

Wed 1/21

5:35 am-11:44 am

1 stop5h 09m

$371

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Wed 12/24

12:50 pm-5:25 pm

1 stop5h 35m

Houston George Bush Intcntl

Tue 12/30

7:50 pm-11:49 pm

Nonstop2h 59m

$373

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Thu 12/18

10:15 pm-12:57 am

Nonstop3h 42m

Houston George Bush Intcntl

Mon 12/22

6:20 pm-10:19 pm

Nonstop2h 59m

$385

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/3

Showing 1-10 of 44 results
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Best time to book a flight from Dulles Intl to Houston

Have a flexible travel schedule? Discover the best time to fly to Houston 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 Houston

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

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Houston. Price data was last updated on October 31, 2025.

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to Houston may vary depending on when you book. For the best chance of a lower fare, look to book 61 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, December is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Houston (average of $130). Flying from Washington, D.C. Dulles Intl Airport to Houston in March is currently the most expensive (average of $215). 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 HOU?

Find hourly flight availability from Dulles Intl to Houston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 4, 2025.

One of the essential ways to save on airfare from Washington, D.C. Dulles Intl Airport to Houston is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 33% on airfare.

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

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Houston. Price data was last updated on December 16, 2024.

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

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

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to Houston trip
Airports
IAD

Expect long security queues at IAD, especially in the afternoon. Plan ahead to avoid delays.

Read more about IADby Ramsey Qubein
IAH

For a quick ride to downtown Houston, Uber or Lyft are recommended from Terminals A, B, and C.

Read more about IAHby Evie Carrick
Our travel experts
Evie Carrick

Evie Carrick

Expert on IAH

Evie Carrick

Evie Carrick

Evie Carrick is a writer and editor who has lived in five countries and traveled to over 50, with extensive experience flying around the world. She was born in Colorado, but has spent time flying to both coasts to visit family. She writes regularly for Travel + Leisure, BuzzFeed, and SKI and recently published seven travel journals with Simon & Schuster.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on IAD

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Reviews of airlines servicing Houston

Get insights into the airlines that provide service to Houston. 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 Houston. Reviews last updated November 4, 2025.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Houston, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,002 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,002 reviews
Delta
7.9
Good
8,002 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
8,997 reviews
Delta
7.9
Good
8,002 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,038 reviews
Delta
7.9
Good
8,002 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Spirit Airlines
6.3
Okay
8,115 reviews
Delta
7.9
Good
8,002 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Frontier
5.8
Fair
3,117 reviews
Delta
7.9
Good
8,002 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

7.9

Comfort

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

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

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

    For as low as $347, Delta can have you in Houston from Washington, D.C. Dulles Intl Airport in 3h 48m. Washington, D.C. Dulles Intl Airport and Houston are separated by a distance of 1188 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Currently priced at $91, Spirit Airlines will fly you from Washington, D.C. Dulles Intl Airport to Houston and back. In addition to Spirit Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Frontier and Delta - these airlines can fly you to your destination from $104 and $144, respectively. These flights start at 76% lower than the current average price 3 months from now.

  • Can I find deals for flights from Dulles Intl to Houston that include hotel bookings?

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

  • How can I find direct flights from Dulles Intl to Houston?

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

  • Can I find deals for business class flights from Dulles Intl to Houston?

    Yes. Cheapflights offers flight deals from Dulles Intl to Houston 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 Houston?

    Currently, December is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Houston (average of $130). Flying from Washington, D.C. Dulles Intl Airport to Houston in March is currently the most expensive (average of $215). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Dulles Intl to Houston

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Dulles Intl to Houston

Discover the top 5 airlines that operate flights from Dulles Intl to Houston. 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 November 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$91Average$187FlexibilityNo cancel feeOn-time65%
FrontierCheapest$104Average$197FlexibilityNo cancel feeOn-time62%
DeltaCheapest$144Average$288FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$236Average$370FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$253Average$393FlexibilityNo cancel feeOn-time69%

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