HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Houston

$100+ 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 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — HOU
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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.

The best prices from Washington, D.C. Dulles Intl to Houston are usually found in September or October, booked 64 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap flight deals from Dulles Intl to Houston

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Houston (HO1). 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 February 20, 2025.

Round-trip from

$147
(CheapOair)

One-way from

$100
(Mytrip)

Popular in

March

Cheapest in

September

Average price

$456
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. 10% potential increase in price ($46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
Search Deals

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 February 20, 2025.

This CheapOair deal was found by Cheapflights users on 2/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/311:45 amIAD - IAH
1 stop28h 58mFrontier
Sun 4/612:49 pmIAH - IAD
1 stop25h 59mFrontier
Deal found 2/20$147
This Mytrip deal was found by Cheapflights users on 2/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/245:40 pmIAD - IAH
3 stops30h 57mMultiple Airlines
Tue 4/2911:30 amIAH - IAD
3 stops22h 50mMultiple Airlines
Deal found 2/18$236
This United Airlines deal was found by Cheapflights users on 2/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/126:00 amIAD - IAH
Nonstop3h 35mUnited Airlines
Sat 3/157:50 pmIAH - IAD
Nonstop2h 58mUnited Airlines
Deal found 2/19$269
This Delta deal was found by Cheapflights users on 2/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/27:35 amIAD - HOU
1 stop7h 15mDelta
Tue 4/86:45 pmHOU - IAD
1 stop4h 43mDelta
Deal found 2/18$289
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/77:46 pmIAD - IAH
1 stop5h 19mDelta
Wed 4/95:20 amIAH - IAD
1 stop5h 11mDelta
Deal found 2/20$289
This American Airlines deal was found by Cheapflights users on 2/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/29:20 amIAD - HOU
2 stops9h 42mAmerican Airlines
Sat 4/129:14 amHOU - IAD
1 stop6h 09mAmerican Airlines
Deal found 2/19$294
This American Airlines deal was found by Cheapflights users on 2/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/121:52 pmIAD - IAH
2 stops10h 03mAmerican Airlines
Thu 3/135:00 amIAH - IAD
1 stop4h 57mAmerican Airlines
Deal found 2/19$294
This Southwest deal was found by Cheapflights users on 2/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/37:50 pmIAD - HOU
1 stop14h 40mSouthwest
Mon 4/74:20 pmHOU - IAD
1 stop7h 25mSouthwest
Deal found 2/20$342
This Mytrip deal was found by Cheapflights users on 2/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/268:00 amIAD - HOU
1 stop28h 30mMultiple Airlines
Sun 3/212:47 pmHOU - IAD
1 stop7h 18mMultiple Airlines
Deal found 2/20$364

Find flights from Dulles Intl to Houston within your budget

Customize your flight search to find flights from Dulles Intl to Houston 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 February 20, 2025.

Fly from

Dulles Intl

Fly to

Houston

Route

Depart

Return

Price

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Thu 4/3

11:45 am-3:43 pm

1 stop28h 58m

Houston George Bush Intcntl

Sun 4/6

12:49 pm-3:48 pm

1 stop25h 59m

$147

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Mon 3/31

5:40 pm-7:37 pm

3 stops26h 57m

Houston George Bush Intcntl

Wed 4/2

5:45 am-11:26 am

3 stops28h 41m

$246

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Wed 3/12

6:00 am-8:35 am

Nonstop3h 35m

Houston George Bush Intcntl

Sat 3/15

7:50 pm-11:48 pm

Nonstop2h 58m

$269

Washington, D.C.Houston

IAD - HOU

IADHOU

Washington, D.C. Dulles Intl

Wed 4/2

7:35 am-1:50 pm

1 stop7h 15m

Houston Hobby

Tue 4/8

6:45 pm-12:28 am

1 stop4h 43m

$289

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Mon 4/7

7:46 pm-12:05 am

1 stop5h 19m

Houston George Bush Intcntl

Wed 4/9

5:20 am-11:31 am

1 stop5h 11m

$289

Washington, D.C.Houston

IAD - HOU

IADHOU

Washington, D.C. Dulles Intl

Wed 4/2

9:20 am-6:02 pm

2 stops9h 42m

Houston Hobby

Sat 4/12

9:14 am-4:23 pm

1 stop6h 09m

$294

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Wed 3/12

1:52 pm-10:55 pm

2 stops10h 03m

Houston George Bush Intcntl

Thu 3/13

5:00 am-10:57 am

1 stop4h 57m

$294

Washington, D.C.Houston

IAD - HOU

IADHOU

Washington, D.C. Dulles Intl

Thu 4/3

7:50 pm-9:30 am

1 stop14h 40m

Houston Hobby

Mon 4/7

4:20 pm-12:45 am

1 stop7h 25m

$342

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Mon 4/14

5:40 pm-10:54 pm

3 stops30h 14m

$100

Washington, D.C.Houston

IAD - IAH

IADIAH

Washington, D.C. Dulles Intl

Thu 4/17

9:26 am-4:44 pm

1 stop8h 18m

$102

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 19 results
1
2

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.

Travel insights for flights from Dulles Intl to Houston

Get recent, data-driven insights about flights from Dulles Intl to Houston including ideal travel times, pricing trends, and more.

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 February 14, 2025.

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 64 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 $334). 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?

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 February 20, 2025.

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?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Houston. Price data was last updated on June 30, 2024.

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.

Rainfall in Houston by month

Plan your trip to Houston by taking into account the average rainfall totals by month.

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.

Temperature in Houston by month

Plan your trip to Houston by taking into account the average temperature totals by month.

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).

Reviews of airlines servicing Houston

Get insights into the airlines that provide service to Houston. 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 Houston. Reviews last updated February 20, 2025.
Get a feel of what it's like to fly with Southwest, Alaska Airlines and Delta from Washington, D.C. to Houston by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Alaska Airlines
8.0
Very good
9,692 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,220 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Qatar Airways
7.4
Good
3,609 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,766 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Food

7.1

Comfort

8.1

Overall

8.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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?

    Currently priced at $147, 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 American Airlines - these airlines can fly you to your destination from $269 and $289, respectively. These flights start at 63% 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 Frontier ($102), United Airlines ($135), and Delta ($143).

  • 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 $334). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Dulles Intl to Houston

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Dallas/Fort Worth flights
Baltimore to Dallas/Fort Worth flights
Baltimore to Hobby flights
Dulles Intl to Hobby flights
Reagan-National to Hobby flights
Reagan-National to Dallas/Fort Worth flights
Dulles Intl to George Bush Intcntl flights
Baltimore to George Bush Intcntl flights
Dulles Intl to Austin flights
Reagan-National to George Bush Intcntl flights
Reagan-National to Austin flights
Baltimore to Austin flights
Dulles Intl to San Antonio flights
Baltimore to San Antonio flights
Baltimore to Love Field flights
Dulles Intl to Love Field flights
Reagan-National to Love Field flights
Reagan-National to San Antonio flights
Reagan-National to El Paso flights
Dulles Intl to El Paso flights
Baltimore to El Paso flights
Dulles Intl to Harlingen flights
Dulles Intl to Lubbock flights
Baltimore to Brownsville flights
Baltimore to Corpus Christi flights
Reagan-National to Harlingen flights
Dulles Intl to Corpus Christi flights
Reagan-National to Lubbock flights
Reagan-National to Brownsville flights
Baltimore to Lubbock flights
Reagan-National to Corpus Christi flights
Dulles Intl to Brownsville flights
Dulles Intl to McAllen flights
Reagan-National to McAllen flights
Baltimore to Harlingen flights
Baltimore to Amarillo flights
Reagan-National to Waco flights
Baltimore to McAllen flights
Dulles Intl to Amarillo flights
Baltimore to Waco flights
Reagan-National to College Station flights
Dulles Intl to Waco flights
Reagan-National to Amarillo flights
Reagan-National to Killeen flights
Dulles Intl to College Station flights
Dulles Intl to Midland flights
Dulles Intl to Laredo flights
Baltimore to College Station flights
Reagan-National to Midland flights
Baltimore to Midland flights

Top 4 airlines flying from Dulles Intl to Houston

Discover the top 4 airlines that operate flights from Dulles Intl to Houston. 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$80Average$198FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$210Average$393FlexibilityNo cancel feeOn-time69%
DeltaCheapest$215Average$290FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$234Average$375FlexibilityNo cancel feeOn-time71%
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.