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$148+ 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 7/15. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — HOU
Aug 5 — Aug 121
Wed 8/5
Wed 8/12
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 July 6, 2026.

This Frontier deal was found by Cheapflights users on 7/3. 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 9/36:20 am
IAD
-
IAH
1 stop5h 27m
Frontier
Mon 9/711:32 am
IAH
-
IAD
1 stop10h 20m
Frontier
Deal found 7/3$278
This CheapOair deal was found by Cheapflights users on 7/2. 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.
Mon 7/276:09 pm
IAD
-
IAH
1 stop21h 41m
Frontier
Fri 7/318:20 am
IAH
-
IAD
1 stop10h 18m
Frontier
Deal found 7/2$279
This CheapOair deal was found by Cheapflights users on 7/3. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/77:18 pm
IAD
-
IAH
1 stop14h 27m
Frontier
Sun 8/97:23 pm
IAH
-
IAD
1 stop22h 10m
Frontier
Deal found 7/3$280
This Kiwi.com deal was found by Cheapflights users on 7/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/198:33 pm
IAD
-
IAH
1 stop11h 47m
Frontier
Sat 7/258:20 am
IAH
-
IAD
1 stop10h 18m
Frontier
Deal found 7/4$281
This Frontier deal was found by Cheapflights users on 7/6. 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 10/57:00 am
IAD
-
IAH
1 stop6h 40m
Frontier
Sun 10/1812:21 pm
IAH
-
IAD
1 stop5h 48m
Frontier
Deal found 7/6$282
This United Airlines deal was found by Cheapflights users on 7/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/185:55 pm
IAD
-
IAH
Nonstop3h 23m
United Airlines
Thu 8/208:20 pm
IAH
-
IAD
Nonstop3h 10m
United Airlines
Deal found 7/3$283
This Frontier deal was found by Cheapflights users on 7/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/48:39 pm
IAD
-
IAH
1 stop11h 41m
Frontier
Mon 9/711:32 am
IAH
-
IAD
1 stop10h 20m
Frontier
Deal found 7/1$284
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 7/208:33 pm
IAD
-
IAH
1 stop11h 47m
Frontier
Tue 7/218:02 pm
IAH
-
IAD
1 stop20h 12m
Frontier
Deal found 7/1$285
This Frontier deal was found by Cheapflights users on 7/5. 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 7/288:33 pm
IAD
-
IAH
1 stop11h 47m
Frontier
Sun 8/168:55 am
IAH
-
IAD
1 stop6h 45m
Frontier
Deal found 7/5$286
This Frontier deal was found by Cheapflights users on 7/3. 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.
Wed 7/158:33 pm
IAD
-
IAH
1 stop11h 47m
Frontier
Wed 7/298:20 am
IAH
-
IAD
1 stop10h 18m
Frontier
Deal found 7/3$287
This Kiwi.com deal was found by Cheapflights users on 7/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/108:33 pm
IAD
-
IAH
1 stop11h 47m
Frontier
Sat 8/86:13 am
IAH
-
IAD
1 stop9h 21m
Frontier
Deal found 7/4$288
This Frontier deal was found by Cheapflights users on 7/3. 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 7/238:33 pm
IAD
-
IAH
1 stop11h 47m
Frontier
Thu 7/3010:53 am
IAH
-
IAD
1 stop11h 02m
Frontier
Deal found 7/3$289

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 July 6, 2026.

Round-trip from

$278
(Frontier)

One-way from

$148
(Kiwi.com)

Popular in

March

Cheapest in

April

Average price

$457
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. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
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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 July 6, 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 - HOU

IADHOU

Washington, D.C. Dulles Intl

Sat 9/5

2:54 pm-9:23 pm

1 stop7h 29m

Houston Hobby

Mon 9/7

1:13 pm-8:55 pm

1 stop6h 42m

$323

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Sat 8/8

10:20 pm-12:45 am

Nonstop3h 25m

Houston George Bush Intcntl

Sat 8/15

2:48 pm-6:59 pm

Nonstop3h 11m

$337

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Tue 9/29

8:30 am-10:51 am

Nonstop3h 21m

Houston George Bush Intcntl

Wed 9/30

6:25 pm-10:30 pm

Nonstop3h 05m

$339

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Sat 8/22

6:30 am-8:44 am

Nonstop3h 14m

Houston George Bush Intcntl

Sat 8/29

2:48 pm-6:59 pm

Nonstop3h 11m

$341

Washington, D.C.Houston

IAD - HOU

IADHOU

Washington, D.C. Dulles Intl

Sat 7/25

6:00 am-9:34 am

1 stop4h 34m

Houston Hobby

Tue 7/28

6:00 am-2:01 pm

1 stop7h 01m

$353

Washington, D.C.Houston

IAD - HOU

IADHOU

Washington, D.C. Dulles Intl

Sun 8/23

6:00 am-9:50 am

1 stop4h 50m

Houston Hobby

Wed 8/26

5:20 pm-12:34 am

1 stop6h 14m

$367

Washington, D.C.Houston

IAD - HOU

IADHOU

Washington, D.C. Dulles Intl

Tue 8/18

5:47 pm-10:05 pm

1 stop5h 18m

Houston Hobby

Sat 8/22

6:00 am-1:43 pm

1 stop6h 43m

$374

Washington, D.C.Houston

IAD - HOU

IADHOU

Washington, D.C. Dulles Intl

Sat 9/5

2:54 pm-9:23 pm

1 stop7h 29m

Houston Hobby

Sun 9/6

10:50 am-4:42 pm

1 stop4h 52m

$389

Washington, D.C.Houston

IAD - HOU

IADHOU

Washington, D.C. Dulles Intl

Fri 8/7

6:00 am-9:50 am

1 stop4h 50m

Houston Hobby

Mon 8/10

5:20 pm-12:34 am

1 stop6h 14m

$401

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Wed 7/22

8:40 am-10:59 am

Nonstop3h 19m

Houston George Bush Intcntl

Sun 7/26

8:20 pm-12:31 am

Nonstop3h 11m

$412

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

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, May is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Houston (average of $45). Flying from Washington, D.C. Dulles Intl Airport to Houston in June is currently the most expensive (average of $162). 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 July 6, 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 in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 7% on airfare.

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

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

About 13% of weekly flights between Washington, D.C. and Houston have experienced delays in the past year, with the average delay time being 159 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 Friday 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 75 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 July 4, 2026.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Houston flight should consider departing on Thursday evenings 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 July 6, 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
8,451 reviews

Crew

8.5

Comfort

7.8

Overall

7.8

Entertainment

7.8

Boarding

8.1

Food

7.2

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
8,451 reviews
Delta
7.8
Good
8,451 reviews

Crew

8.5

Comfort

7.8

Overall

7.8

Entertainment

7.8

Boarding

8.1

Food

7.2

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
9,945 reviews
Delta
7.8
Good
8,451 reviews

Crew

8.5

Comfort

7.8

Overall

7.8

Entertainment

7.8

Boarding

8.1

Food

7.2

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
11,783 reviews
Delta
7.8
Good
8,451 reviews

Crew

8.5

Comfort

7.8

Overall

7.8

Entertainment

7.8

Boarding

8.1

Food

7.2

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
2,841 reviews
Delta
7.8
Good
8,451 reviews

Crew

8.5

Comfort

7.8

Overall

7.8

Entertainment

7.8

Boarding

8.1

Food

7.2

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 $337, Delta can have you in Houston from Washington, D.C. Dulles Intl Airport in 3h 25m. 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 United Airlines and Delta - these airlines can fly you to your destination from $238 and $304, respectively. These flights start at 74% 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, May is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Houston (average of $45). Flying from Washington, D.C. Dulles Intl Airport to Houston in June is currently the most expensive (average of $162). 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 July 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$104Average$216FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$238Average$459FlexibilityNo cancel feeOn-time69%
DeltaCheapest$304Average$432FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$317Average$476FlexibilityNo cancel feeOn-time71%

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