HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$133+ 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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — IAD
Sep 13 — Sep 201
Sun 9/13
Sun 9/20
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Houston to Dulles Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 August 14, 2026.

This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/244:56 pm -
Nonstop3h 12m
Wed 10/286:00 am -
Nonstop3h 37m
Deal found 8/12$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.
Mon 9/2810:09 pm -
2 stops25h 01m
Wed 9/306:00 am -
1 stop13h 25m
Deal found 8/14$220
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/307:55 pm -
1 stop11h 09m
Mon 8/3110:45 am -
1 stop6h 29m
Deal found 8/12$221
This Expedia deal was found by Cheapflights users on 8/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/28:36 am -
1 stop10h 45m
Sat 11/77:00 am -
1 stop9h 05m
Deal found 8/11$222
This Kiwi.com deal was found by Cheapflights users on 8/10. 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 8/266:00 am -
1 stop10h 14m
Sat 8/297:00 am -
1 stop16h 14m
Deal found 8/10$223
This Frontier deal was found by Cheapflights users on 8/11. 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 9/46:00 am -
1 stop10h 14m
Mon 9/78:39 pm -
1 stop11h 41m
Deal found 8/11$224
This United Airlines deal was found by Cheapflights users on 8/11. 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.
Wed 9/26:40 pm -
Nonstop3h 05m
Mon 9/76:30 am -
Nonstop3h 14m
Deal found 8/11$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.
Fri 8/287:55 pm -
1 stop11h 09m
Mon 8/318:39 pm -
1 stop11h 41m
Deal found 8/13$226
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/98:25 am -
1 stop10h 44m
Fri 9/1111:12 am -
1 stop23h 13m
Deal found 8/14$227
This Expedia deal was found by Cheapflights users on 8/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/313:25 pm -
1 stop17h 42m
Thu 9/36:20 am -
1 stop5h 27m
Deal found 8/11$228
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 9/186:08 am -
1 stop10h 10m
Sun 9/209:04 pm -
1 stop11h 13m
Deal found 8/12$229
This United Airlines deal was found by Cheapflights users on 8/11. 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.
Thu 9/32:48 pm -
Nonstop3h 11m
Mon 9/76:30 am -
Nonstop3h 14m
Deal found 8/11$231

Find 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 August 14, 2026.

Round-trip from

$219
(United Airlines)

One-way from

$133
(Kiwi.com)

Popular in

February

Cheapest in

October

Average price

$407
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. 20% potential increase in price ($116 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($28 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 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 August 14, 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HoustonWashington, D.C.

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

HOUIAD

Houston Hobby

Tue 9/8

5:26 pm-12:41 am

1 stop6h 15m

Washington, D.C. Dulles Intl

Tue 9/15

6:00 am-10:00 am

1 stop5h 00m

$239

HoustonWashington, D.C.

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

HOUIAD

Houston Hobby

Sat 9/12

5:26 pm-12:41 am

1 stop6h 15m

Washington, D.C. Dulles Intl

Mon 9/14

5:12 pm-10:39 pm

1 stop6h 27m

$269

HoustonWashington, D.C.

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

HOUIAD

Houston Hobby

Fri 9/25

2:25 pm-9:44 pm

1 stop6h 19m

Washington, D.C. Dulles Intl

Thu 10/1

8:08 am-1:18 pm

1 stop6h 10m

$271

HoustonWashington, D.C.

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

HOUIAD

Houston Hobby

Fri 9/25

5:20 pm-12:41 am

1 stop6h 21m

Washington, D.C. Dulles Intl

Fri 10/2

5:12 pm-10:39 pm

1 stop6h 27m

$303

HoustonWashington, D.C.

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

IAHIAD

Houston George Bush Intcntl

Sat 9/12

4:45 pm-8:56 pm

Nonstop3h 11m

Washington, D.C. Dulles Intl

Mon 9/14

10:29 pm-12:45 am

Nonstop3h 16m

$309

HoustonWashington, D.C.

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

HOUIAD

Houston Hobby

Tue 10/13

6:09 am-2:08 pm

1 stop6h 59m

Washington, D.C. Dulles Intl

Sat 10/17

6:12 pm-11:03 pm

1 stop5h 51m

$309

HoustonWashington, D.C.

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

HOUIAD

Houston Hobby

Sat 9/12

5:26 pm-12:41 am

1 stop6h 15m

Washington, D.C. Dulles Intl

Sat 9/19

6:07 pm-10:39 pm

1 stop5h 32m

$317

HoustonWashington, D.C.

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

HOUIAD

Houston Hobby

Wed 10/14

5:28 pm-12:42 am

1 stop6h 14m

Washington, D.C. Dulles Intl

Sat 10/17

6:12 pm-11:03 pm

1 stop5h 51m

$329

HoustonWashington, D.C.

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

IAHIAD

Houston George Bush Intcntl

Thu 9/24

6:25 pm-10:30 pm

Nonstop3h 05m

Washington, D.C. Dulles Intl

Sun 9/27

8:30 am-10:51 am

Nonstop3h 21m

$337

HoustonWashington, D.C.

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

HOUIAD

Houston Hobby

Thu 9/24

5:20 pm-12:41 am

1 stop6h 21m

Washington, D.C. Dulles Intl

Sat 9/26

6:07 pm-10:39 pm

1 stop5h 32m

$339

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 45 resultsSorted by cheapest first
1
2
3
...
5

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

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

Currently, October is the cheapest month in which you can book a flight from Houston to Washington, D.C. Dulles Intl Airport (average of $328). Flying from Houston to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $580). 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 August 14, 2026.

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 24% on the cost of your flight, compared to a flight in the evening.

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

Airfare is below average for this route at the moment.
Houston to Washington, D.C. Dulles Intl Airport flights typically cost between $248 and $604 in October.
The cheapest round-trip price found within the last 5 days was $219 on United Airlines (Oct 24-Oct 28).

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

About 29% of weekly flights between Houston and Washington, D.C. have experienced delays in the past year, with the average delay time being 60 minutes.

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

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

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

Saturday 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.

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

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 88 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 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 August 8, 2026.

Travelers seeking maximum savings on their Houston to Washington, D.C. Dulles Intl Airport flight should consider departing on Monday at noon 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 Houston to Washington, D.C. Dulles Intl Airport 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 Houston to Washington, D.C. Dulles Intl Airport 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 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 August 14, 2026.
See what other customers who have flown with United Airlines and Frontier 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.
United Airlines
7.4
Good
10,112 reviews

Comfort

7.3

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
10,112 reviews
United Airlines
7.4
Good
10,112 reviews

Comfort

7.3

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Frontier
5.6
Fair
2,694 reviews
United Airlines
7.4
Good
10,112 reviews

Comfort

7.3

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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 11m. Your travel time can differ by up to 3h 04m. 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, Frontier ($113), and United Airlines ($243) offers the cheapest pricing from Houston to Washington, D.C. Dulles Intl Airport. Users have found that Frontier is 74% 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 $55. Users have also found prices from $148 and $187 on United Airlines and Delta, 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, October is the cheapest month in which you can book a flight from Houston to Washington, D.C. Dulles Intl Airport (average of $328). Flying from Houston to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $580). 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
Owings Mills
Arlington
Tysons
Springfield
Lanham
Reston
Herndon
Rockville
Chantilly
Hyattsville
Fredericksburg
Falls Church
Hanover
Laurel
Sterling
Oxon Hill
Clinton
Hunt Valley
Woodbridge

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 2 airlines flying from Houston to Dulles Intl

Discover the top 2 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 August 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$113Average$232FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$243Average$459FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.