What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Houston round-trip?

Currently priced at $196, 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 Southwest - these airlines can fly you to your destination from $209 and $229, respectively. These flights start at 48% lower than the current average price 3 months from now.

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

The cheapest airlines for a one-way flight from Washington, D.C. Dulles Intl Airport to Houston are United Airlines ($105), Frontier ($106), and Southwest ($115).

In terms of precipitation, rainfall in Houston ranges from 3.2 - 5.9 inches per month. June is typically the wettest month, when rainfall can reach 5.9 in. February is typically the driest time to visit Houston when rainfall is around 3.2 in.

If weather is an important factor for your trip to Houston, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 53.6 F).

What are the most popular airlines that fly from Washington, D.C. Dulles Intl Airport to Houston?

Before booking your flight from Washington, D.C. Dulles Intl Airport to Houston check out the most popular airlines for this route: American Airlines, Delta or Frontier.

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

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 12% on your flight compared to booking on days when demand is much higher.

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

August can be a great time to fly to Houston from Washington, D.C. Dulles Intl Airport with a flight ticket averaging about $304. Cheapflights users have found deals in the month of August for as cheap as $92. The most expensive prices can be found in the month of November.

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.

$105+ Flights from Washington, D.C. Dulles Intl Airport to Houston

Q: How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Houston?

To save up to 120% on this flight, we recommend booking at least 31 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Washington, D.C. Dulles Intl Airport to Houston from $284 1-2 weeks out and tickets from $466 for flights departing within the next 72 hours.

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Find cheap flights from Dulles Intl to Houston 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.

Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Houston are usually found in October or January, booked 84 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap flight deals from Dulles Intl to Houston

Round-trip from	$196 (Kiwi.com)
One-way from	$105 (United Airlines)
Popular in	December
Cheapest in	October
Average price	$383

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. 1% potential increase in price ($5 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Find 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 julio 25, 2025.

sáb. 8/24:17 pmIAD - IAH

1 stop7h 39mFrontier

sáb. 8/96:00 amIAH - IAD

1 stop8h 12mFrontier

Deal found 7/23

$196

sáb. 8/236:00 amIAD - IAH

Nonstop3h 14mUnited Airlines

sáb. 8/307:50 pmIAH - IAD

Nonstop3h 05mUnited Airlines

Deal found 7/24

$209

mar. 8/195:45 amIAD - HOU

1 stop7h 35mSouthwest

mar. 8/261:35 pmHOU - IAD

1 stop7h 30mSouthwest

Deal found 7/23

$229

jue. 8/146:00 amIAD - HOU

1 stop7h 10mDelta

mar. 8/1910:22 amHOU - IAD

1 stop7h 27mDelta

Deal found 7/24

$237

mar. 10/76:00 amIAD - IAH

1 stop7h 19mDelta

mar. 10/146:00 amIAH - IAD

1 stop6h 57mDelta

Deal found 7/22

$237

sáb. 8/29:43 pmIAD - IAH

2 stops24h 56mMultiple Airlines

sáb. 8/165:27 pmIAH - IAD

2 stops15h 47mMultiple Airlines

Deal found 7/22

$242

jue. 8/216:27 amIAD - IAH

1 stop12h 17mAmerican Airlines

dom. 8/247:44 pmIAH - IAD

1 stop14h 17mAmerican Airlines

Deal found 7/22

$267

lun. 11/106:04 amIAD - HOU

1 stop6h 40mAmerican Airlines

sáb. 11/159:07 amHOU - IAD

1 stop12h 21mAmerican Airlines

Deal found 7/24

$273

jue. 11/2012:50 pmIAD - HOU

1 stop22h 41mSun Country Air

lun. 11/247:49 pmHOU - IAD

1 stop14h 53mSun Country Air

Deal found 7/23

$285

Best flights from Dulles Intl to Houston
Discover carefully curated flight deals from Dulles Intl to Houston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated julio 25, 2025.

sáb. 8/24:17 pmIAD - IAH

1 stop7h 39mFrontier

sáb. 8/96:00 amIAH - IAD

1 stop8h 12mFrontier

Deal found 7/23

$196

sáb. 8/236:00 amIAD - IAH

Nonstop3h 14mUnited Airlines

sáb. 8/307:50 pmIAH - IAD

Nonstop3h 05mUnited Airlines

Deal found 7/24

$209

mar. 8/195:45 amIAD - HOU

1 stop7h 35mSouthwest

mar. 8/261:35 pmHOU - IAD

1 stop7h 30mSouthwest

Deal found 7/23

$229

jue. 8/146:00 amIAD - HOU

1 stop7h 10mDelta

mar. 8/1910:22 amHOU - IAD

1 stop7h 27mDelta

Deal found 7/24

$237

sáb. 8/29:43 pmIAD - IAH

2 stops24h 56mMultiple Airlines

sáb. 8/165:27 pmIAH - IAD

2 stops15h 47mMultiple Airlines

Deal found 7/22

$242

jue. 8/216:27 amIAD - IAH

1 stop12h 17mAmerican Airlines

dom. 8/247:44 pmIAH - IAD

1 stop14h 17mAmerican Airlines

Deal found 7/22

$267

mar. 10/76:00 amIAD - IAH

1 stop7h 19mDelta

mar. 10/146:00 amIAH - IAD

1 stop6h 57mDelta

Deal found 7/22

$237

jue. 8/286:27 amIAD - HOU

1 stop8h 24mAmerican Airlines

mar. 9/26:30 pmHOU - IAD

1 stop15h 27mAmerican Airlines

Deal found 7/22

$273

Last-minute flights from Dulles Intl to Houston
Discover last-minute flight deals from Dulles Intl to Houston. Data last updated julio 25, 2025 and is based on user searches.

mar. 7/2912:34 pmIAD - HOU

1 stop25h 55mSun Country Air

jue. 8/147:41 pmHOU - IAD

1 stop15h 14mSun Country Air

Deal found 7/24

$465

mar. 7/293:37 pmIAD - HOU

1 stop6h 03mDelta

lun. 8/186:34 pmHOU - IAD

1 stop4h 47mDelta

Deal found 7/23

$569

mié. 7/306:27 amIAD - HOU

1 stop8h 26mAmerican Airlines

mié. 8/610:14 amHOU - IAD

1 stop7h 42mAmerican Airlines

Deal found 7/23

$547

jue. 7/312:05 pmIAD - HOU

1 stop7h 15mSouthwest

jue. 8/71:00 pmHOU - IAD

2 stops8h 50mSouthwest

Deal found 7/24

$630

sáb. 8/24:17 pmIAD - IAH

1 stop7h 39mFrontier

sáb. 8/96:00 amIAH - IAD

1 stop8h 12mFrontier

Deal found 7/23

$196

sáb. 8/29:43 pmIAD - IAH

2 stops24h 56mMultiple Airlines

sáb. 8/165:27 pmIAH - IAD

2 stops15h 47mMultiple Airlines

Deal found 7/22

$242

jue. 8/146:00 amIAD - HOU

1 stop7h 10mDelta

mar. 8/1910:22 amHOU - IAD

1 stop7h 27mDelta

Deal found 7/24

$237

sáb. 8/166:00 amIAD - IAH

1 stop7h 02mDelta

mié. 8/201:07 pmIAH - IAD

1 stop4h 42mDelta

Deal found 7/22

$237

mar. 8/195:45 amIAD - HOU

1 stop7h 35mSouthwest

mar. 8/261:35 pmHOU - IAD

1 stop7h 30mSouthwest

Deal found 7/23

$229

jue. 8/216:27 amIAD - IAH

1 stop12h 17mAmerican Airlines

dom. 8/247:44 pmIAH - IAD

1 stop14h 17mAmerican Airlines

Deal found 7/22

$267

sáb. 8/236:00 amIAD - IAH

Nonstop3h 14mUnited Airlines

sáb. 8/307:50 pmIAH - IAD

Nonstop3h 05mUnited Airlines

Deal found 7/24

$209

vie. 8/296:27 amIAD - HOU

1 stop10h 23mAmerican Airlines

mar. 9/26:00 amHOU - IAD

1 stop11h 56mAmerican Airlines

Deal found 7/24

$304

One-way flights from Dulles Intl to Houston
Search for one-way flight options from Dulles Intl to Houston. Find affordable one-way fares based on user searches. Data last updated julio 25, 2025.

mar. 8/125:55 pmIAD - IAH

Nonstop3h 21mUnited Airlines

Deal found 7/22

$105

mié. 9/109:15 amIAD - IAH

1 stop8h 19mFrontier

Deal found 7/23

$106

lun. 8/255:40 pmIAD - IAH

3 stops19h 10mMultiple Airlines

Deal found 7/23

$110

mié. 8/135:45 amIAD - HOU

1 stop9h 15mSouthwest

Deal found 7/21

$115

jue. 8/146:00 amIAD - HOU

1 stop7h 10mDelta

Deal found 7/23

$119

mar. 8/123:26 pmIAD - IAH

1 stop5h 34mDelta

Deal found 7/22

$119

jue. 8/286:27 amIAD - IAH

1 stop13h 05mAmerican Airlines

Deal found 7/22

$124

jue. 8/1412:40 pmIAD - HOU

1 stop7h 02mSun Country Air

Deal found 7/23

$150

sáb. 9/2011:47 amIAD - HOU

1 stop5h 08mAmerican Airlines

Deal found 7/24

$155

Cheapflights Fare Finder

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

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

sáb. 8/2

4:17 pm-10:56 pm

1 stop7h 39m

Houston George Bush Intcntl

sáb. 8/9

6:00 am-3:12 pm

1 stop8h 12m

$196

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

sáb. 8/23

6:00 am-8:14 am

Nonstop3h 14m

Houston George Bush Intcntl

sáb. 8/30

7:50 pm-11:55 pm

Nonstop3h 05m

$209

Washington, D.C.Houston

IAD - HOU

IADHOU

Washington, D.C. Dulles Intl

mar. 8/19

5:45 am-12:20 pm

1 stop7h 35m

Houston Hobby

mar. 8/26

1:35 pm-10:05 pm

1 stop7h 30m

$229

Washington, D.C.Houston

IAD - HOU

IADHOU

Washington, D.C. Dulles Intl

jue. 8/14

6:00 am-12:10 pm

1 stop7h 10m

Houston Hobby

mar. 8/19

10:22 am-6:49 pm

1 stop7h 27m

$237

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

mar. 10/7

6:00 am-12:19 pm

1 stop7h 19m

Houston George Bush Intcntl

mar. 10/14

6:00 am-1:57 pm

1 stop6h 57m

$237

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

sáb. 8/2

9:43 pm-9:39 pm

2 stops24h 56m

Houston George Bush Intcntl

sáb. 8/16

5:27 pm-10:14 am

2 stops15h 47m

$242

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

jue. 8/21

6:27 am-5:44 pm

1 stop12h 17m

Houston George Bush Intcntl

dom. 8/24

7:44 pm-11:01 am

1 stop14h 17m

$267

Washington, D.C.Houston

IAD - HOU

IADHOU

Washington, D.C. Dulles Intl

lun. 11/10

6:04 am-11:44 am

1 stop6h 40m

Houston Hobby

sáb. 11/15

9:07 am-10:28 pm

1 stop12h 21m

$273

Washington, D.C.Houston

IAD - HOU

IADHOU

Washington, D.C. Dulles Intl

jue. 11/20

12:50 pm-10:31 am

1 stop22h 41m

Houston Hobby

lun. 11/24

7:49 pm-11:42 am

1 stop14h 53m

$285

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

mar. 8/12

5:55 pm-8:16 pm

Nonstop3h 21m

$105

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/22

Showing 1-10 of 18 results

The best insider tips for Washington, D.C. Dulles Intl Airport to Houston flights

Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to Houston trip

Airports

IAD

Expect long security queues at IAD, especially in the afternoon. Plan ahead to avoid delays.

IAH

For a quick ride to downtown Houston, Uber or Lyft are recommended from Terminals A, B, and C.

Our travel experts

Evie Carrick

Expert on IAH

Ramsey Qubein

Expert on IAD

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

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 84 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Houston (average of $230). Flying from Washington, D.C. Dulles Intl Airport to Houston in March is currently the most expensive (average of $331). 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?

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 at noon tend to be the most expensive. A flight in the evening could potentially save you up to 21% on airfare.

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

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

Reviews of airlines servicing Houston

Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Houston, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,235 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Southwest

8.0

Very good

4,235 reviews

Southwest

8.0

Very good

4,235 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Delta

8.0

Very good

7,967 reviews

Southwest

8.0

Very good

4,235 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

United Airlines

7.4

Good

8,876 reviews

Southwest

8.0

Very good

4,235 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,235 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Sun Country Air

6.9

Okay

334 reviews

Southwest

8.0

Very good

4,235 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Related info for your journey

What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Houston round-trip?
Currently priced at $196, 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 Southwest - these airlines can fly you to your destination from $209 and $229, respectively. These flights start at 48% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Houston one-way?
The cheapest airlines for a one-way flight from Washington, D.C. Dulles Intl Airport to Houston are United Airlines ($105), Frontier ($106), and Southwest ($115).
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, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Houston (average of $230). Flying from Washington, D.C. Dulles Intl Airport to Houston in March is currently the most expensive (average of $331). 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

Alternative routes for Dulles Intl to Houston

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Complete your trip

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Top 5 airlines flying from Dulles Intl to Houston

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$95	Average$187	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$100	Average$220	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$234	Average$288	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$240	Average$306	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$261	Average$390	FlexibilityNo cancel fee	On-time69%

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$105+ 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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Dulles Intl to Houston with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Houston are usually found in October or January, booked 84 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap flight deals from Dulles Intl to Houston

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Dulles Intl to Houston

Cheapest flights from Dulles Intl to HoustonExplore 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 julio 25, 2025.

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 julio 25, 2025.

Cheapflights Fare Finder

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

The best insider tips for Washington, D.C. Dulles Intl Airport to Houston flights

Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to Houston trip

Airports

IAD

IAH

Our travel experts

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.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Houston

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

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Houston. Price data was last updated on July 18, 2025.

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

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 julio 25, 2025.

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 December 16, 2024.

Reviews of airlines servicing Houston

Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Houston, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

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.

What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Houston round-trip?

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

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

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

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

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

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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 julio 25, 2025.