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$115+ 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 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — HOU
Sep 16 — Sep 231
Wed 9/16
Wed 9/23
1 adult, Economy
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Cheap 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 August 17, 2026.

This United Airlines deal was found by Cheapflights users on 8/13. 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.
Mon 9/1410:29 pm -
Nonstop3h 16m
Thu 9/178:20 pm -
Nonstop3h 10m
Deal found 8/13$219
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 9/28:39 pm -
1 stop11h 41m
Mon 9/78:11 pm -
2 stops20h 03m
Deal found 8/14$220
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 9/28:39 pm -
1 stop11h 41m
Sun 9/66:00 am -
1 stop10h 14m
Deal found 8/14$221
This Kiwi.com deal was found by Cheapflights users on 8/15. 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.
Fri 9/49:54 pm -
1 stop11h 08m
Sat 9/266:08 am -
1 stop10h 10m
Deal found 8/15$222
This Kiwi.com deal was found by Cheapflights users on 8/14. 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.
Sat 9/57:00 am -
1 stop16h 14m
Mon 9/73:25 pm -
1 stop17h 42m
Deal found 8/14$223
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Fri 9/1111:12 am -
2 stops12h 18m
Sun 9/139:04 pm -
1 stop19h 14m
Deal found 8/12$224
This Travelocity deal was found by Cheapflights users on 8/13. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:00 am -
1 stop9h 50m
Sun 10/48:25 am -
1 stop10h 44m
Deal found 8/13$225
This Frontier deal was found by Cheapflights users on 8/13. 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 8/278:39 pm -
1 stop11h 41m
Mon 8/3111:32 am -
1 stop10h 20m
Deal found 8/13$226
This Frontier deal was found by Cheapflights users on 8/16. 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 9/189:04 pm -
1 stop11h 13m
Thu 10/16:08 am -
1 stop10h 10m
Deal found 8/16$227
This CheapOair deal was found by Cheapflights users on 8/16. 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 9/1211:12 am -
1 stop23h 14m
Tue 9/158:25 am -
1 stop10h 44m
Deal found 8/16$228
This Kiwi.com deal was found by Cheapflights users on 8/16. 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.
Fri 9/259:04 pm -
1 stop11h 13m
Mon 9/2810:09 pm -
2 stops25h 01m
Deal found 8/16$229
This Trip.com deal was found by Cheapflights users on 8/14. 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.
Wed 9/28:59 am -
1 stop11h 09m
Wed 9/96:28 am -
1 stop16h 42m
Deal found 8/14$230

Find 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 August 17, 2026.

Round-trip from

$219
(United Airlines)

One-way from

$115
(Frontier)

Popular in

July

Cheapest in

April

Average price

$487
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. 13% potential increase in price ($66 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

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 August 17, 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Houston

IAD Washington, D.C. Dulles Intl - HOU Houston Hobby

IADHOU

Washington, D.C. Dulles Intl

Fri 10/2

5:12 pm-10:39 pm

1 stop6h 27m

Houston Hobby

Mon 10/5

5:20 pm-12:41 am

1 stop6h 21m

$271

Washington, D.C.Houston

IAD Washington, D.C. Dulles Intl - IAH Houston George Bush Intcntl

IADIAH

Washington, D.C. Dulles Intl

Fri 9/25

6:15 am-8:27 am

Nonstop3h 12m

Houston George Bush Intcntl

Mon 9/28

2:51 pm-7:02 pm

Nonstop3h 11m

$306

Washington, D.C.Houston

IAD Washington, D.C. Dulles Intl - HOU Houston Hobby

IADHOU

Washington, D.C. Dulles Intl

Mon 9/21

6:00 am-10:00 am

1 stop5h 00m

Houston Hobby

Wed 9/23

2:25 pm-8:14 pm

1 stop4h 49m

$313

Washington, D.C.Houston

IAD Washington, D.C. Dulles Intl - HOU Houston Hobby

IADHOU

Washington, D.C. Dulles Intl

Wed 9/30

10:15 am-4:30 pm

1 stop7h 15m

Houston Hobby

Wed 10/7

5:28 pm-12:42 am

1 stop6h 14m

$317

Washington, D.C.Houston

IAD Washington, D.C. Dulles Intl - HOU Houston Hobby

IADHOU

Washington, D.C. Dulles Intl

Thu 10/29

6:00 am-10:08 am

1 stop5h 08m

Houston Hobby

Sat 11/7

6:09 am-2:08 pm

1 stop6h 59m

$317

Washington, D.C.Houston

IAD Washington, D.C. Dulles Intl - IAH Houston George Bush Intcntl

IADIAH

Washington, D.C. Dulles Intl

Mon 8/31

10:29 pm-12:45 am

Nonstop3h 16m

Houston George Bush Intcntl

Thu 9/3

8:20 pm-12:30 am

Nonstop3h 10m

$321

Washington, D.C.Houston

IAD Washington, D.C. Dulles Intl - IAH Houston George Bush Intcntl

IADIAH

Washington, D.C. Dulles Intl

Fri 11/13

5:00 pm-10:11 pm

1 stop6h 11m

Houston George Bush Intcntl

Mon 11/16

5:39 am-11:35 am

1 stop4h 56m

$326
Quickest round-trip

Washington, D.C.Houston

IAD Washington, D.C. Dulles Intl - IAH Houston George Bush Intcntl

IADIAH

Washington, D.C. Dulles Intl

Fri 10/23

10:18 pm-12:30 am

Nonstop3h 12m

Houston George Bush Intcntl

Sun 10/25

4:45 pm-8:49 pm

Nonstop3h 04m

$369

Washington, D.C.Houston

IAD Washington, D.C. Dulles Intl - IAH Houston George Bush Intcntl

IADIAH

Washington, D.C. Dulles Intl

Sat 9/12

10:29 pm-12:45 am

Nonstop3h 16m

Houston George Bush Intcntl

Tue 9/15

7:20 am-4:24 pm

1 stop8h 04m

$373

Washington, D.C.Houston

IAD Washington, D.C. Dulles Intl - IAH Houston George Bush Intcntl

IADIAH

Washington, D.C. Dulles Intl

Mon 9/14

12:45 pm-3:05 pm

Nonstop3h 20m

Houston George Bush Intcntl

Tue 9/15

7:20 am-11:28 am

Nonstop3h 08m

$387

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 41 resultsSorted by cheapest first
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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

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 $255). Flying from Washington, D.C. Dulles Intl Airport to Houston in July is currently the most expensive (average of $548). 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 August 17, 2026.

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 5% on airfare.

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Houston?

Airfare is below average for this route at the moment.
Washington, D.C. Dulles Intl Airport to Houston flights typically cost between $238 and $651 in September.
The cheapest round-trip price found within the last 5 days was $219 on United Airlines (Sep 14-Sep 17).

How often are flights from Washington, D.C. to Houston delayed?

About 12% of weekly flights between Washington, D.C. and Houston have experienced delays in the past year, with the average delay time being 161 minutes.

What is the most punctual flight time for Washington, D.C. to Houston flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Washington, D.C. to Houston flights?

Over the last year, United Airlines have had the lowest number of delays on this route, with just 12% of flights being delayed.

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

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 76 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 August 15, 2026.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Houston flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday evenings 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

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to Houston trip
Our travel experts
Evie Carrick

Evie Carrick

Expert on IAH

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

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 August 17, 2026.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Houston, such as Delta,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,504 reviews

Overall

7.8

Comfort

7.8

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Matt,Sep 2023

LAX - DAL

The crew was exceptional. The best crew on all 4 flight we took on this trip.
Delta
7.8
Good
8,504 reviews
Delta
7.8
Good
8,504 reviews

Overall

7.8

Comfort

7.8

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Matt,Sep 2023

LAX - DAL

The crew was exceptional. The best crew on all 4 flight we took on this trip.
United Airlines
7.4
Good
10,106 reviews
Delta
7.8
Good
8,504 reviews

Overall

7.8

Comfort

7.8

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Matt,Sep 2023

LAX - DAL

The crew was exceptional. The best crew on all 4 flight we took on this trip.
American Airlines
7.1
Good
11,946 reviews
Delta
7.8
Good
8,504 reviews

Overall

7.8

Comfort

7.8

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Matt,Sep 2023

LAX - DAL

The crew was exceptional. The best crew on all 4 flight we took on this trip.
Frontier
5.6
Fair
2,681 reviews
Delta
7.8
Good
8,504 reviews

Overall

7.8

Comfort

7.8

Boarding

8.1

Food

7.2

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Matt,Sep 2023

LAX - DAL

The crew was exceptional. The best crew on all 4 flight we took on this trip.

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 $306, Delta can have you in Houston from Washington, D.C. Dulles Intl Airport in 3h 12m. 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 $104, Frontier will fly you from Washington, D.C. Dulles Intl Airport to Houston and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and United Airlines - these airlines can fly you to your destination from $232 and $250, respectively. These flights start at 75% 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 ($58), United Airlines ($135), and American Airlines ($179).

  • 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 $255). Flying from Washington, D.C. Dulles Intl Airport to Houston in July is currently the most expensive (average of $548). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 4 airlines flying from Dulles Intl to Houston

Discover the top 4 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 August 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$104Average$218FlexibilityNo cancel feeOn-time62%
DeltaCheapest$232Average$419FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$250Average$468FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$317Average$476FlexibilityNo cancel feeOn-time71%

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