HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$135+ 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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — IAD
Aug 5 — Aug 121
Wed 8/5
Wed 8/12
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 July 6, 2026.

This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/207:23 pm
IAH
-
IAD
1 stop16h 24m
Frontier
Wed 7/298:33 pm
IAD
-
IAH
1 stop11h 47m
Frontier
Deal found 7/2$287
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/248:43 pm
IAH
-
IAD
1 stop10h 37m
Frontier
Sun 7/268:33 pm
IAD
-
IAH
1 stop11h 47m
Frontier
Deal found 7/2$288
This Kissandfly.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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:41 am
IAH
-
IAD
1 stop9h 53m
Frontier
Mon 8/176:00 am
IAD
-
IAH
2 stops10h 05m
Frontier
Deal found 7/1$289
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.
Wed 7/156:00 am
IAH
-
IAD
1 stop10h 14m
Frontier
Sat 7/181:21 pm
IAD
-
IAH
1 stop6h 04m
Frontier
Deal found 7/1$290
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.
Fri 7/178:20 am
IAH
-
IAD
1 stop10h 18m
Frontier
Mon 7/206:09 pm
IAD
-
IAH
1 stop21h 41m
Frontier
Deal found 7/1$291
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/125:09 pm
IAH
-
IAD
1 stop25h 00m
Frontier
Fri 10/168:00 pm
IAD
-
IAH
1 stop15h 24m
Frontier
Deal found 7/1$292
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/26:30 am
IAH
-
IAD
1 stop9h 22m
Frontier
Thu 8/68:33 pm
IAD
-
IAH
1 stop11h 47m
Frontier
Deal found 7/1$293
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.
Sat 7/188:20 am
IAH
-
IAD
1 stop10h 18m
Frontier
Mon 7/206:09 pm
IAD
-
IAH
1 stop21h 41m
Frontier
Deal found 7/1$294
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.
Sat 7/118:20 am
IAH
-
IAD
1 stop10h 18m
Frontier
Mon 7/136:09 pm
IAD
-
IAH
1 stop21h 41m
Frontier
Deal found 7/1$295
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 10/612:21 pm
IAH
-
IAD
1 stop5h 48m
Frontier
Thu 10/89:16 pm
IAD
-
IAH
1 stop11h 13m
Frontier
Deal found 7/5$296
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/88:20 am
IAH
-
IAD
1 stop10h 18m
Frontier
Tue 7/145:40 pm
IAD
-
IAH
1 stop22h 10m
Frontier
Deal found 7/2$297
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.
Thu 7/238:50 am
IAH
-
IAD
1 stop6h 50m
Frontier
Mon 7/276:09 pm
IAD
-
IAH
2 stops29h 30m
Frontier
Deal found 7/4$298

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 July 6, 2026.

Round-trip from

$287
(Expedia)

One-way from

$133
(Super.com)

Popular in

February

Cheapest in

September

Average price

$311
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. 25% potential increase in price ($143 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 6, 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 - IAD

HOUIAD

Houston Hobby

Sat 8/15

6:00 am-1:43 pm

1 stop6h 43m

Washington, D.C. Dulles Intl

Mon 8/17

6:00 am-9:50 am

1 stop4h 50m

$303

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Thu 9/17

5:40 am-11:31 am

1 stop4h 51m

Washington, D.C. Dulles Intl

Sat 9/19

3:15 pm-7:30 pm

1 stop5h 15m

$303

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Tue 9/1

1:13 pm-8:05 pm

1 stop5h 52m

Washington, D.C. Dulles Intl

Thu 9/3

12:30 pm-4:25 pm

1 stop4h 55m

$323

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Wed 8/5

8:20 pm-12:31 am

Nonstop3h 11m

Washington, D.C. Dulles Intl

Tue 8/18

8:31 am-10:52 am

Nonstop3h 21m

$337

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Mon 8/10

6:00 am-2:05 pm

1 stop7h 05m

Washington, D.C. Dulles Intl

Thu 8/13

8:28 am-12:16 pm

1 stop4h 48m

$337

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Tue 9/15

7:20 am-11:28 am

Nonstop3h 08m

Washington, D.C. Dulles Intl

Tue 9/22

10:29 pm-12:45 am

Nonstop3h 16m

$339

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Fri 8/14

4:45 pm-8:56 pm

Nonstop3h 11m

Washington, D.C. Dulles Intl

Tue 8/18

10:29 pm-12:45 am

Nonstop3h 16m

$347
Quickest round-trip

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Tue 9/22

7:50 pm-11:55 pm

Nonstop3h 05m

Washington, D.C. Dulles Intl

Sun 9/27

6:15 am-8:27 am

Nonstop3h 12m

$347

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Wed 7/22

5:17 pm-12:41 am

1 stop6h 24m

Washington, D.C. Dulles Intl

Tue 7/28

5:46 pm-9:51 pm

1 stop5h 05m

$353

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Wed 8/19

6:00 am-2:05 pm

1 stop7h 05m

Washington, D.C. Dulles Intl

Wed 8/26

6:00 am-9:50 am

1 stop4h 50m

$357

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 43 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, December is the cheapest month in which you can book a flight from Houston to Washington, D.C. Dulles Intl Airport (average of $63). Flying from Houston to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $200). 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 July 6, 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 22% 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?

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

About 28% of weekly flights between Houston and Washington, D.C. have experienced delays in the past year, with the average delay time being 66 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 85 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 July 4, 2026.

Travelers seeking maximum savings on their Houston to Washington, D.C. Dulles Intl Airport flight should consider departing on Thursday 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 July 6, 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
9,940 reviews

Comfort

7.3

Boarding

7.7

Food

6.7

Overall

7.4

Entertainment

7.1

Crew

8.1

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
9,940 reviews
United Airlines
7.4
Good
9,940 reviews

Comfort

7.3

Boarding

7.7

Food

6.7

Overall

7.4

Entertainment

7.1

Crew

8.1

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
2,845 reviews
United Airlines
7.4
Good
9,940 reviews

Comfort

7.3

Boarding

7.7

Food

6.7

Overall

7.4

Entertainment

7.1

Crew

8.1

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 32m. 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 ($120), and United Airlines ($243) offers the cheapest pricing from Houston to Washington, D.C. Dulles Intl Airport. Users have found that Frontier is 71% 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 $135 and $144 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, December is the cheapest month in which you can book a flight from Houston to Washington, D.C. Dulles Intl Airport (average of $63). Flying from Houston to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $200). 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
Arlington
Tysons
Owings Mills
Springfield
Lanham
Reston
Herndon
Rockville
Hyattsville
Falls Church
Fredericksburg
Hanover
Chantilly
Manassas
Silver Spring
Laurel
Clinton
Hunt Valley
Cordova

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 July 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$113Average$223FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$243Average$461FlexibilityNo 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.
Site
©2026 Cheapflights