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Dulles Intl

$81+ 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 3/24. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — IAD
Jan 27 — Feb 31
Mon 1/27
Mon 2/3
1 adult, Economy
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The best prices from Houston to Washington, D.C. Dulles Intl are usually found in September or February, booked 50 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap 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 January 22, 2025.

Round-trip from

$173
(CheapOair)

One-way from

$81
(Frontier)

Popular in

November

Cheapest in

September

Average price

$339
From Houston to Washington, D.C. Dulles Intl
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One-way flight from Houston to Washington, D.C. Dulles Intl
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Highest demand for flights based on searches. 5% potential increase in price ($22 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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Find 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 January 22, 2025.

This Booking.com deal was found by Cheapflights users on 1/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/218:22 pmIAH - IAD
1 stop19h 32mFrontier
Tue 3/2510:09 amIAD - IAH
1 stop7h 35mFrontier
Deal found 1/21$173
This Mytrip deal was found by Cheapflights users on 1/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/183:10 pmIAH - IAD
3 stops19h 16mMultiple Airlines
Tue 2/255:40 pmIAD - IAH
3 stops26h 31mMultiple Airlines
Deal found 1/21$258
This Delta deal was found by Cheapflights users on 1/20. 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.
Tue 3/117:05 amIAH - IAD
1 stop8h 14mDelta
Wed 3/127:35 amIAD - IAH
1 stop17h 24mDelta
Deal found 1/20$263
This United Airlines deal was found by Cheapflights users on 1/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/196:32 pmIAH - IAD
Nonstop2h 58mUnited Airlines
Wed 2/268:25 amIAD - IAH
Nonstop3h 35mUnited Airlines
Deal found 1/20$269
This American Airlines deal was found by Cheapflights users on 1/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/18:42 amIAH - IAD
2 stops8h 19mAmerican Airlines
Sun 3/24:35 pmIAD - IAH
1 stop6h 46mAmerican Airlines
Deal found 1/22$288
This Delta deal was found by Cheapflights users on 1/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/146:37 pmHOU - IAD
1 stop4h 43mDelta
Wed 2/196:15 pmIAD - HOU
1 stop5h 14mDelta
Deal found 1/21$289
This American Airlines deal was found by Cheapflights users on 1/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/2710:15 amHOU - IAD
1 stop4h 57mAmerican Airlines
Sun 3/25:13 pmIAD - HOU
1 stop7h 37mAmerican Airlines
Deal found 1/21$314
This Southwest deal was found by Cheapflights users on 1/22. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/253:20 pmHOU - IAD
1 stop6h 45mSouthwest
Wed 2/2611:10 amIAD - HOU
2 stops12h 00mSouthwest
Deal found 1/22$319
This eDestinos deal was found by Cheapflights users on 1/21. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/210:55 amHOU - IAD
1 stop8h 47mAvelo Airlines
Sun 5/118:52 pmIAD - HOU
1 stop14h 18mAvelo Airlines
Deal found 1/21$353
This eDestinos deal was found by Cheapflights users on 1/22. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1210:36 amHOU - IAD
3 stops29h 18mMultiple Airlines
Fri 3/147:30 pmIAD - HOU
1 stop26h 15mMultiple Airlines
Deal found 1/22$366

Find flights from Houston to Dulles Intl within your budget

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 January 22, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Fri 3/21

8:22 pm-4:54 pm

1 stop19h 32m

Washington, D.C. Dulles Intl

Tue 3/25

10:09 am-4:44 pm

1 stop7h 35m

$173

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Tue 2/18

7:42 am-1:18 pm

1 stop4h 36m

Washington, D.C. Dulles Intl

Tue 2/18

5:13 pm-10:10 pm

1 stop5h 57m

$252

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Tue 2/18

3:10 pm-11:26 am

3 stops19h 16m

Washington, D.C. Dulles Intl

Tue 2/25

5:40 pm-7:11 pm

3 stops26h 31m

$258

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Tue 3/11

7:05 am-4:19 pm

1 stop8h 14m

Washington, D.C. Dulles Intl

Wed 3/12

7:35 am-11:59 pm

1 stop17h 24m

$263

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Wed 2/19

5:05 pm-9:03 pm

Nonstop2h 58m

Washington, D.C. Dulles Intl

Fri 2/21

6:00 am-8:35 am

Nonstop3h 35m

$269

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Fri 2/14

6:37 pm-12:20 am

1 stop4h 43m

Washington, D.C. Dulles Intl

Wed 2/19

6:15 pm-10:29 pm

1 stop5h 14m

$289

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Thu 2/27

10:15 am-4:12 pm

1 stop4h 57m

Washington, D.C. Dulles Intl

Sun 3/2

5:13 pm-11:50 pm

1 stop7h 37m

$314

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Tue 2/25

3:20 pm-11:05 pm

1 stop6h 45m

Washington, D.C. Dulles Intl

Wed 2/26

11:10 am-10:10 pm

2 stops12h 00m

$319

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Fri 5/2

10:55 am-8:42 pm

1 stop8h 47m

Washington, D.C. Dulles Intl

Sun 5/11

8:52 pm-10:10 am

1 stop14h 18m

$353

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Wed 3/12

10:36 am-4:54 pm

3 stops29h 18m

Washington, D.C. Dulles Intl

Fri 3/14

7:30 pm-8:45 pm

1 stop26h 15m

$366

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 22 results
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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.

Travel insights for flights from Houston to Dulles Intl

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

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

Use this chart to determine the optimal time to book a round-trip flight from Houston to Dulles Intl. Price data was last updated on January 17, 2025.

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 50 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, August is the cheapest month in which you can book a flight from Houston to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Houston to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $389). 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 January 22, 2025.

It’s optimal to fly from Houston to Washington, D.C. Dulles Intl Airport in the afternoon. By choosing this option you can save up to 9% on the cost of your flight, compared to a flight in the morning.

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 June 30, 2024.

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

Rainfall in Dulles Intl by month

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

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

Temperature in Dulles Intl by month

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

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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 January 22, 2025.
To help decide which airline to fly from Houston to Washington, D.C., see what other customers have to say about United Airlines, Delta and Southwest. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,654 reviews

Crew

8.7

Boarding

8.2

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,654 reviews
Southwest
8.1
Very good
4,654 reviews

Crew

8.7

Boarding

8.2

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,707 reviews
Southwest
8.1
Very good
4,654 reviews

Crew

8.7

Boarding

8.2

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,514 reviews
Southwest
8.1
Very good
4,654 reviews

Crew

8.7

Boarding

8.2

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Qatar Airways
7.5
Good
3,750 reviews
Southwest
8.1
Very good
4,654 reviews

Crew

8.7

Boarding

8.2

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Avelo Airlines
7.5
Good
74 reviews
Southwest
8.1
Very good
4,654 reviews

Crew

8.7

Boarding

8.2

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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.

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

    According to our current data, Frontier ($173), United Airlines ($269), and American Airlines ($288) offers the cheapest pricing from Houston to Washington, D.C. Dulles Intl Airport. Users have found that Frontier is 55% 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 $81. Users have also found prices from $135 and $145 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, August is the cheapest month in which you can book a flight from Houston to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Houston to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $389). 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 Houston?

Book flights to Houston if you plan to visit one of these locations
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Alternative routes for Houston to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
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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 January 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$49Average$199FlexibilityNo cancel feeOn-time65%
DeltaCheapest$240Average$343FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$241Average$456FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$248Average$392FlexibilityNo cancel feeOn-time69%
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