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Dulles Intl

$67+ 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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — IAD
May 23 — May 301
Sat 5/23
Sat 5/30
1 adult, Economy
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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 April 23, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/22. 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 5/268:02 pm
IAH
-
IAD
1 stop13h 10m
Frontier
Tue 6/27:37 pm
IAD
-
IAH
1 stop12h 57m
Frontier
Deal found 4/22$140
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 5/126:05 am
IAH
-
IAD
1 stop9h 16m
Frontier
Wed 5/135:07 pm
IAD
-
IAH
1 stop16h 43m
Frontier
Deal found 4/21$142
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 5/268:02 pm
IAH
-
IAD
1 stop13h 10m
Frontier
Mon 6/18:47 pm
IAD
-
IAH
1 stop14h 30m
Frontier
Deal found 4/21$156
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 5/268:02 pm
IAH
-
IAD
1 stop13h 10m
Frontier
Thu 5/288:47 pm
IAD
-
IAH
1 stop11h 47m
Frontier
Deal found 4/22$157
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 5/205:45 am
IAH
-
IAD
1 stop10h 42m
Frontier
Wed 5/276:22 pm
IAD
-
IAH
1 stop21h 41m
Frontier
Deal found 4/22$158
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 5/268:02 pm
IAH
-
IAD
1 stop13h 10m
Frontier
Fri 5/298:47 pm
IAD
-
IAH
1 stop11h 47m
Frontier
Deal found 4/22$159
This Frontier deal was found by Cheapflights users on 4/20. 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 5/216:10 am
IAH
-
IAD
1 stop9h 11m
Frontier
Sat 5/238:47 pm
IAD
-
IAH
1 stop11h 47m
Frontier
Deal found 4/20$160
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 5/88:50 pm
IAH
-
IAD
1 stop12h 22m
Frontier
Mon 5/117:27 pm
IAD
-
IAH
1 stop14h 33m
Frontier
Deal found 4/21$161
This WAYA deal was found by Cheapflights users on 4/21. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/166:25 am
IAH
-
IAD
1 stop8h 56m
Frontier
Tue 5/197:40 am
IAD
-
IAH
1 stop8h 18m
Frontier
Deal found 4/21$162
This Kiwi.com deal was found by Cheapflights users on 4/23. 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 5/118:50 pm
IAH
-
IAD
1 stop12h 22m
Frontier
Wed 5/135:07 pm
IAD
-
IAH
1 stop16h 43m
Frontier
Deal found 4/23$163
This Kiwi.com deal was found by Cheapflights users on 4/19. 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 5/196:05 am
IAH
-
IAD
1 stop9h 16m
Frontier
Tue 5/265:30 pm
IAD
-
IAH
1 stop22h 33m
Frontier
Deal found 4/19$168
This Kiwi.com deal was found by Cheapflights users on 4/19. 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 5/207:44 pm
IAH
-
IAD
1 stop21h 58m
Frontier
Tue 5/265:30 pm
IAD
-
IAH
1 stop22h 33m
Frontier
Deal found 4/19$169

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 April 23, 2026.

Round-trip from

$140
(Kiwi.com)

One-way from

$67
(Kiwi.com)

Popular in

February

Cheapest in

October

Average price

$428
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. 30% potential increase in price ($171 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 23, 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.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Sat 5/16

7:20 am-11:28 am

Nonstop3h 08m

Washington, D.C. Dulles Intl

Mon 5/18

10:20 pm-12:45 am

Nonstop3h 25m

$349

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Thu 5/14

6:39 pm-10:49 pm

Nonstop3h 10m

Washington, D.C. Dulles Intl

Sun 5/24

2:53 pm-5:11 pm

Nonstop3h 18m

$372

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Thu 5/21

7:20 am-11:28 am

Nonstop3h 08m

Washington, D.C. Dulles Intl

Thu 6/11

10:20 pm-12:45 am

Nonstop3h 25m

$457
Quickest round-trip

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Wed 5/27

6:32 pm-10:43 pm

Nonstop3h 11m

Washington, D.C. Dulles Intl

Wed 6/17

6:30 am-8:39 am

Nonstop3h 09m

$461

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Sun 7/19

6:00 am-11:40 am

1 stop4h 40m

Washington, D.C. Dulles Intl

Wed 7/22

6:00 am-9:45 am

1 stop4h 45m

$477

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Fri 6/12

12:13 pm-9:04 pm

1 stop7h 51m

Washington, D.C. Dulles Intl

Sun 6/14

8:27 am-1:43 pm

1 stop6h 16m

$477

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Fri 7/17

8:05 am-4:49 pm

1 stop7h 44m

Washington, D.C. Dulles Intl

Mon 7/20

12:37 pm-5:42 pm

1 stop6h 05m

$477

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Fri 6/12

7:00 am-2:02 pm

1 stop6h 02m

Washington, D.C. Dulles Intl

Thu 6/18

8:27 am-3:25 pm

1 stop7h 58m

$477

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Sat 5/30

3:25 pm-10:56 pm

1 stop6h 31m

Washington, D.C. Dulles Intl

Tue 6/2

12:37 pm-5:30 pm

1 stop5h 53m

$477

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Sat 6/13

8:05 am-2:02 pm

1 stop4h 57m

Washington, D.C. Dulles Intl

Thu 6/18

8:27 am-3:25 pm

1 stop7h 58m

$477

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/22

Showing 1-10 of 41 resultsSorted by cheapest first
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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?

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 60 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, 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 February is currently the most expensive (average of $180). 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 April 23, 2026.

It’s optimal to fly from Houston to Washington, D.C. Dulles Intl Airport in the morning. By choosing this option you can save up to 5% on the cost of your flight, compared to a flight in the evening.

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 April 18, 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.

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 15% of weekly flights between Houston and Washington, D.C. have experienced delays in the past year, with the average delay time being 103 minutes.

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

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

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

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

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 April 23, 2026.
See what other customers who have flown with United Airlines,Spirit Airlines, andFrontier 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
9,637 reviews

Entertainment

7.1

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

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
9,637 reviews
United Airlines
7.4
Good
9,637 reviews

Entertainment

7.1

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

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
Spirit Airlines
6.3
Okay
8,634 reviews
United Airlines
7.4
Good
9,637 reviews

Entertainment

7.1

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

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
5.7
Fair
2,981 reviews
United Airlines
7.4
Good
9,637 reviews

Entertainment

7.1

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

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?

    United Airlines, Delta, and Southwest can get you from Houston to Washington, D.C. Dulles Intl Airport in just under 3h 08m. Your travel time can differ by up to 4h 07m. 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 ($63), Frontier ($120), and United Airlines ($235) offers the cheapest pricing from Houston to Washington, D.C. Dulles Intl Airport. Users have found that Spirit Airlines is 83% 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 $128 and $144 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, 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 February is currently the most expensive (average of $180). 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
Owings Mills
Springfield
Arlington
Woodbridge
Silver Spring
Herndon
Rockville
Hyattsville
Fredericksburg
Hanover
Laurel
Manassas
Largo
Upper Marlboro
Waldorf
Bowie
Clinton
Hunt Valley

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from Houston to Dulles Intl

Discover the top 4 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 April 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$63Average$179FlexibilityNo cancel feeOn-time65%
FrontierCheapest$120Average$226FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$235Average$413FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$294Average$556FlexibilityNo cancel feeOn-time71%

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