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Dulles Intl

$66+ Cheap flights from Houston 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 12/18. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — IAD
Dec 16 — Dec 231
Tue 12/16
Tue 12/23
1 adult, Economy
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Find cheap flights from Houston to Dulles Intl with Cheapflights

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Cheapflights Tip: The best prices from Houston to Washington, D.C. Dulles Intl are usually found in October or August, booked 67 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Find flight deals from Houston to Dulles Intl

Cheapest flights from Houston to Dulles Intl
Explore the most affordable flight options available from Houston to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/99:31 amIAH - IAD
1 stop27h 58mFrontier
Fri 12/125:45 amIAD - IAH
1 stop18h 05mFrontier
Deal found 11/13$139
This Frontier deal was found by Cheapflights users on 11/16. 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.
Sun 12/216:00 amIAH - IAD
1 stop9h 58mFrontier
Tue 12/306:34 amIAD - IAH
1 stop11h 31mFrontier
Deal found 11/16$141
This Frontier deal was found by Cheapflights users on 11/16. 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.
Thu 12/256:00 amIAH - IAD
1 stop11h 16mFrontier
Tue 12/309:58 pmIAD - IAH
1 stop10h 56mFrontier
Deal found 11/16$144
This CheapOair deal was found by Cheapflights users on 11/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/286:04 amIAH - IAD
1 stop10h 42mFrontier
Sun 12/79:20 pmIAD - IAH
1 stop22h 09mFrontier
Deal found 11/14$145
This CheapOair deal was found by Cheapflights users on 11/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/58:07 pmIAH - IAD
1 stop23h 17mFrontier
Thu 12/115:45 amIAD - IAH
1 stop11h 25mFrontier
Deal found 11/15$146
This Kiwi.com deal was found by Cheapflights users on 11/14. 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.
Sun 12/144:57 pmIAH - IAD
1 stop5h 08mFrontier
Sun 12/219:58 pmIAD - IAH
1 stop10h 23mFrontier
Deal found 11/14$147
This Kiwi.com deal was found by Cheapflights users on 11/15. 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 12/126:05 amIAH - IAD
1 stop9h 19mFrontier
Mon 12/156:58 pmIAD - IAH
1 stop26h 55mFrontier
Deal found 11/15$148
This Kiwi.com deal was found by Cheapflights users on 11/15. 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.
Sun 12/712:50 pmIAH - IAD
1 stop18h 41mMultiple Airlines
Fri 12/125:19 pmIAD - IAH
1 stop6h 31mMultiple Airlines
Deal found 11/15$150
This Kiwi.com deal was found by Cheapflights users on 11/16. 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 12/128:07 pmIAH - IAD
1 stop23h 17mMultiple Airlines
Mon 12/156:58 pmIAD - IAH
1 stop14h 27mMultiple Airlines
Deal found 11/16$151
This Kiwi.com deal was found by Cheapflights users on 11/16. 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 12/58:58 pmIAH - IAD
2 stops25h 07mFrontier
Sat 12/139:20 pmIAD - IAH
1 stop10h 46mFrontier
Deal found 11/16$153
This Kiwi.com deal was found by Cheapflights users on 11/14. 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.
Sun 11/238:25 pmIAH - IAD
1 stop10h 20mMultiple Airlines
Mon 11/2412:47 pmIAD - IAH
1 stop7h 18mMultiple Airlines
Deal found 11/14$157
This Kiwi.com deal was found by Cheapflights users on 11/16. 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.
Sat 11/228:23 pmIAH - IAD
1 stop12h 39mMultiple Airlines
Mon 11/2412:47 pmIAD - IAH
1 stop7h 18mMultiple Airlines
Deal found 11/16$158

Cheap flight deals from Houston to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Houston (HO1) to Dulles Intl (IAD). 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 16, 2025.

Round-trip from

$139
(Kiwi.com)

One-way from

$66
(Trip.com)

Popular in

November

Cheapest in

October

Average price

$504
From Houston to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Houston to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Houston to Dulles Intl 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 16, 2025.
Use the filters below to find and compare flights from Houston to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Houston

Fly to

Dulles Intl

Route

Depart

Return

Price

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Wed 12/3

6:00 am-11:33 am

1 stop4h 33m

Washington, D.C. Dulles Intl

Sat 12/6

3:38 pm-10:33 pm

1 stop7h 55m

$305

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Tue 12/2

6:39 pm-12:12 am

1 stop4h 33m

Washington, D.C. Dulles Intl

Wed 12/10

7:01 am-11:30 am

1 stop5h 29m

$305

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Sat 12/6

11:58 am-6:21 pm

1 stop5h 23m

Washington, D.C. Dulles Intl

Tue 12/9

12:30 pm-5:44 pm

1 stop6h 14m

$305

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Tue 1/6

7:20 am-11:23 am

Nonstop3h 03m

Washington, D.C. Dulles Intl

Tue 1/20

12:42 pm-5:17 pm

1 stop5h 35m

$330

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Sun 2/8

12:49 pm-11:43 am

1 stop21h 54m

Washington, D.C. Dulles Intl

Wed 2/11

7:15 am-11:33 am

1 stop5h 18m

$334

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Thu 11/27

2:32 pm-9:22 pm

1 stop5h 50m

Washington, D.C. Dulles Intl

Tue 12/2

5:59 pm-10:48 pm

1 stop5h 49m

$336

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Sat 12/13

10:39 am-5:00 pm

1 stop5h 21m

Washington, D.C. Dulles Intl

Mon 12/15

5:59 pm-10:48 pm

1 stop5h 49m

$340

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Sat 12/13

11:58 am-6:21 pm

1 stop5h 23m

Washington, D.C. Dulles Intl

Tue 12/16

7:35 pm-11:59 pm

1 stop5h 24m

$340

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Mon 12/15

4:43 pm-8:42 pm

Nonstop2h 59m

Washington, D.C. Dulles Intl

Wed 12/17

6:00 am-8:29 am

Nonstop3h 29m

$355

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Fri 1/9

5:04 pm-11:37 pm

1 stop5h 33m

Washington, D.C. Dulles Intl

Tue 1/13

6:20 am-10:21 am

1 stop5h 01m

$361

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/16

Showing 1-10 of 46 results
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Best time to book a flight from Houston to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Houston 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 Houston to Washington, D.C. Dulles Intl Airport

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

Use this chart to determine the optimal time to book a round-trip flight from Houston to Dulles Intl. Price data was last updated on November 14, 2025.

To ensure you get the cheapest price possible for a flight from Houston to Washington, D.C. Dulles Intl Airport, you should look to book at least 67 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from Houston to Washington, D.C. Dulles Intl Airport (average of $54). Flying from Houston to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of $275). 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 HOU to IAD?

Find hourly flight availability from Houston 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 November 16, 2025.

It’s optimal to fly from Houston to Washington, D.C. Dulles Intl Airport at noon. By choosing this option you can save up to 25% on the cost of your flight, compared to a flight in the morning.

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

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

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

The best insider tips for Houston to Washington, D.C. Dulles Intl Airport 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 Houston to Washington, D.C. Dulles Intl Airport trip
Airports
IAH

Check security wait times on the IAH website to save time before your flight.

Read more about IAHby Evie Carrick
IAD

Use the Washington Metro Silver Line for a cheap, 40-minute ride to downtown from IAD.

Read more about IADby Ramsey Qubein
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 Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated November 16, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from Houston to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,010 reviews

Comfort

7.9

Food

7.3

Overall

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.1

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
8,010 reviews
Delta
7.9
Good
8,010 reviews

Comfort

7.9

Food

7.3

Overall

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.1

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
9,016 reviews
Delta
7.9
Good
8,010 reviews

Comfort

7.9

Food

7.3

Overall

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.1

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
11,051 reviews
Delta
7.9
Good
8,010 reviews

Comfort

7.9

Food

7.3

Overall

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.1

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
8,143 reviews
Delta
7.9
Good
8,010 reviews

Comfort

7.9

Food

7.3

Overall

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.1

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
3,109 reviews
Delta
7.9
Good
8,010 reviews

Comfort

7.9

Food

7.3

Overall

7.9

Crew

8.5

Entertainment

7.9

Boarding

8.1

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 Houston to Dulles Intl. 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 Houston to Washington, D.C. Dulles Intl Airport?

    Delta and United Airlines can get you from Houston to Washington, D.C. Dulles Intl Airport in just under 3h 03m. Your travel time can differ by up to 1h 30m. Houston and Washington, D.C. Dulles Intl Airport 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 Houston to Washington, D.C. Dulles Intl Airport round-trip?

    According to our current data, Spirit Airlines ($54), Frontier ($144), and American Airlines ($234) offers the cheapest pricing from Houston to Washington, D.C. Dulles Intl Airport. Users have found that Spirit Airlines is 84% cheaper than the other options available to this destination.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $93. Users have also found prices from $143 and $147 on United Airlines and American Airlines, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Houston 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 Houston to Washington, D.C. Dulles Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from Houston to Washington, D.C. Dulles Intl Airport (average of $54). Flying from Houston to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of $275). 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

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Tysons
Woodbridge
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Linthicum Heights
Manassas
Laurel
Towson
National Harbor
Waldorf
Bowie
Largo
McLean

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Houston to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to Dulles Intl flights
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Brownsville to Reagan-National flights
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College Station to Reagan-National flights
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Top 5 airlines flying from Houston to Dulles Intl

Discover the top 5 airlines that operate flights from Houston to Dulles Intl. 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 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$54Average$197FlexibilityNo cancel feeOn-time65%
FrontierCheapest$144Average$230FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$234Average$411FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$236Average$400FlexibilityNo cancel feeOn-time69%
DeltaCheapest$236Average$354FlexibilityNo cancel feeOn-timeN/A

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