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$85+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — HOU
Sep 10 — Sep 171
Wed 9/10
Wed 9/17
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 January, booked 84 days in advance, depart on a Wednesday or Monday and return on a Wednesday

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 September 5, 2025.

Round-trip from

$142
(Cheapflightsfares)

One-way from

$85
(Priceline)

Popular in

December

Cheapest in

October

Average price

$377
From Washington, D.C. Dulles Intl to Houston
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One-way flight from Washington, D.C. Dulles Intl to Houston
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Highest demand for flights based on searches. 1% potential increase in price ($4 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 5, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/3. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/204:45 pmIAD - IAH
1 stop6h 18mFrontier
Sat 10/252:10 pmIAH - IAD
1 stop5h 43mFrontier
Deal found 9/3$142
This Booking.com deal was found by Cheapflights users on 9/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/181:55 pmIAD - IAH
1 stop8h 57mFrontier
Mon 9/2211:39 amIAH - IAD
1 stop5h 45mFrontier
Deal found 9/2$143
This Frontier deal was found by Cheapflights users on 9/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/111:55 pmIAD - IAH
1 stop8h 57mFrontier
Sat 9/135:46 pmIAH - IAD
1 stop5h 09mFrontier
Deal found 9/3$144
This Frontier deal was found by Cheapflights users on 9/4. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/121:55 pmIAD - IAH
1 stop8h 58mFrontier
Wed 9/1710:30 amIAH - IAD
1 stop8h 25mFrontier
Deal found 9/4$145
This Cheapflightsfares deal was found by Cheapflights users on 9/3. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/75:34 pmIAD - IAH
1 stop5h 29mFrontier
Mon 11/105:56 pmIAH - IAD
1 stop5h 15mFrontier
Deal found 9/3$149
This Mytrip deal was found by Cheapflights users on 9/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/256:10 amIAD - IAH
1 stop11h 51mFrontier
Mon 9/2911:39 amIAH - IAD
1 stop5h 45mFrontier
Deal found 9/3$150
This Frontier deal was found by Cheapflights users on 9/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/156:10 amIAD - IAH
1 stop11h 51mFrontier
Wed 9/2410:30 amIAH - IAD
1 stop8h 25mFrontier
Deal found 9/3$151
This Kiwi.com deal was found by Cheapflights users on 9/3. 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.
Thu 10/94:40 pmIAD - IAH
1 stop6h 23mFrontier
Wed 10/158:37 pmIAH - IAD
1 stop21h 30mFrontier
Deal found 9/3$152
This Trip.com deal was found by Cheapflights users on 9/3. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/267:14 pmIAD - IAH
1 stop21h 22mFrontier
Mon 9/2911:39 amIAH - IAD
1 stop5h 45mFrontier
Deal found 9/3$155
This Mytrip deal was found by Cheapflights users on 9/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/221:55 pmIAD - IAH
1 stop8h 58mFrontier
Tue 9/2310:30 amIAH - IAD
1 stop8h 25mFrontier
Deal found 9/2$156
This Frontier deal was found by Cheapflights users on 9/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/169:15 amIAD - IAH
1 stop8h 19mFrontier
Tue 9/2310:30 amIAH - IAD
1 stop8h 25mFrontier
Deal found 9/3$157
This CheapOair deal was found by Cheapflights users on 9/4. 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 10/313:49 pmIAD - IAH
1 stop19h 11mFrontier
Mon 11/36:15 amIAH - IAD
1 stop10h 08mFrontier
Deal found 9/4$158

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 September 5, 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 - IAH

IADIAH

Washington, D.C. Dulles Intl

Mon 11/10

5:29 pm-10:00 pm

1 stop5h 31m

Houston George Bush Intcntl

Fri 11/14

12:49 pm-7:51 pm

1 stop6h 02m

$142

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Fri 9/19

3:15 pm-9:54 am

1 stop19h 39m

Houston George Bush Intcntl

Mon 9/22

11:39 am-6:24 pm

1 stop5h 45m

$143

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Thu 10/30

6:00 am-5:01 pm

1 stop12h 01m

Houston George Bush Intcntl

Sun 11/2

11:33 am-10:09 pm

1 stop9h 36m

$143

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Fri 10/17

3:10 pm-9:00 am

1 stop18h 50m

Houston George Bush Intcntl

Mon 10/20

12:42 pm-7:14 pm

1 stop5h 32m

$144

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Thu 10/9

4:40 pm-10:03 pm

1 stop6h 23m

Houston George Bush Intcntl

Sun 10/12

7:57 pm-6:45 pm

1 stop21h 48m

$167

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Mon 9/8

1:55 pm-9:53 pm

1 stop8h 58m

Houston George Bush Intcntl

Thu 9/11

11:44 am-6:24 pm

1 stop5h 40m

$180

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Fri 10/31

5:34 pm-10:06 pm

1 stop5h 32m

Houston George Bush Intcntl

Sun 11/2

10:04 am-12:11 am

2 stops37h 07m

$200

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Mon 9/8

1:55 pm-9:53 pm

1 stop8h 58m

Houston George Bush Intcntl

Fri 9/12

11:39 am-6:19 pm

1 stop5h 40m

$204

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Sat 10/4

7:14 pm-10:44 am

2 stops16h 30m

Houston George Bush Intcntl

Sat 10/11

8:00 pm-2:25 pm

1 stop17h 25m

$221

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Mon 9/22

6:10 am-7:10 pm

2 stops14h 00m

Houston George Bush Intcntl

Wed 9/24

10:30 am-6:24 pm

2 stops30h 54m

$234

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/3

Showing 1-10 of 36 results
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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

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 August 29, 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 84 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, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Houston (average of $230). Flying from Washington, D.C. Dulles Intl Airport to Houston in March is currently the most expensive (average of $331). 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 September 5, 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 evening could potentially save you up to 21% 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 Sunday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 September 5, 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
8.0
Very good
7,977 reviews

Overall

8.0

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,977 reviews
Delta
8.0
Very good
7,977 reviews

Overall

8.0

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,937 reviews
Delta
8.0
Very good
7,977 reviews

Overall

8.0

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,977 reviews

Overall

8.0

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Spirit Airlines
6.3
Okay
8,015 reviews
Delta
8.0
Very good
7,977 reviews

Overall

8.0

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Frontier
5.8
Fair
3,194 reviews
Delta
8.0
Very good
7,977 reviews

Overall

8.0

Comfort

7.9

Food

7.3

Boarding

8.2

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $142, Frontier can have you in Houston from Washington, D.C. Dulles Intl Airport in 5h 31m. 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 American Airlines - these airlines can fly you to your destination from $120 and $234, respectively. These flights start at 76% lower than the current average price 3 months from now.

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

    The cheapest airlines for a one-way flight from Washington, D.C. Dulles Intl Airport to Houston are Frontier ($85), Allegiant Air ($138), and Delta ($151).

  • 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, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Houston (average of $230). Flying from Washington, D.C. Dulles Intl Airport to Houston in March is currently the most expensive (average of $331). 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.
Dulles Intl to Dallas/Fort Worth flights
Baltimore to Dallas/Fort Worth flights
Reagan-National to Dallas/Fort Worth flights
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Reagan-National to Brownsville flights
Baltimore to San Angelo flights
Reagan-National to Corpus Christi flights
Reagan-National to Killeen flights
Reagan-National to San Angelo flights
Baltimore to Midland flights
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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 September 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$91Average$191FlexibilityNo cancel feeOn-time65%
FrontierCheapest$120Average$221FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$234Average$300FlexibilityNo cancel feeOn-time71%
DeltaCheapest$240Average$316FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$254Average$390FlexibilityNo cancel feeOn-time69%

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