$149 Cheap Flights from Houston (HOU) to Washington (IAD)

View $149 flight on Fri, Sep 12, 2025Opens in a new window

Popular airlines from Houston William Hobby Airport (HOU) to Washington Dulles Intl. Airport (IAD)

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Cheap Flights from Houston to Washington (HOU-IAD)

Prices were available within the past 7 days and start at $149 for one-way flights and $231 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Wed, Aug 27 - Tue, Sep 30
HOU
Houston
IAD
Washington
$231 Roundtrip, found 6 days ago
$231
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Wed, Aug 27 from Houston to Washington, returning Tue, Sep 30, priced at $231 found 6 days ago
Southwest Airlines
Wed, Aug 27 - Tue, Sep 30
HOU
Houston
IAD
Washington
$234 Roundtrip, found 6 days ago
$234
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Wed, Aug 27 from Houston to Washington, returning Tue, Sep 30, priced at $234 found 6 days ago
Southwest Airlines
Wed, Aug 27 - Tue, Sep 30
HOU
Houston
IAD
Washington
$236 Roundtrip, found 6 days ago
$236
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Wed, Aug 27 from Houston to Washington, returning Tue, Sep 30, priced at $236 found 6 days ago
Delta
Wed, Oct 1 - Mon, Oct 6
HOU
Houston
IAD
Washington
$237 Roundtrip, found 5 days ago
$237
Roundtrip
found 5 days ago
Select Delta flight, departing Wed, Oct 1 from Houston to Washington, returning Mon, Oct 6, priced at $237 found 5 days ago
American Airlines
Wed, Oct 1 - Mon, Oct 6
HOU
Houston
IAD
Washington
$237 Roundtrip, found 5 days ago
$237
Roundtrip
found 5 days ago
Select American Airlines flight, departing Wed, Oct 1 from Houston to Washington, returning Mon, Oct 6, priced at $237 found 5 days ago
Southwest Airlines
Wed, Aug 27 - Tue, Sep 30
HOU
Houston
IAD
Washington
$239 Roundtrip, found 6 days ago
$239
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Wed, Aug 27 from Houston to Washington, returning Tue, Sep 30, priced at $239 found 6 days ago
Southwest Airlines
Wed, Aug 27 - Tue, Sep 30
HOU
Houston
IAD
Washington
$242 Roundtrip, found 6 days ago
$242
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Wed, Aug 27 from Houston to Washington, returning Tue, Sep 30, priced at $242 found 6 days ago
Southwest Airlines
Wed, Aug 27 - Tue, Sep 30
HOU
Houston
IAD
Washington
$244 Roundtrip, found 6 days ago
$244
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Wed, Aug 27 from Houston to Washington, returning Tue, Sep 30, priced at $244 found 6 days ago
Southwest Airlines
Wed, Aug 27 - Tue, Sep 30
HOU
Houston
IAD
Washington
$265 Roundtrip, found 6 days ago
$265
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Wed, Aug 27 from Houston to Washington, returning Tue, Sep 30, priced at $265 found 6 days ago
Southwest Airlines
Wed, Aug 27 - Tue, Sep 30
HOU
Houston
IAD
Washington
$268 Roundtrip, found 6 days ago
$268
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Wed, Aug 27 from Houston to Washington, returning Tue, Sep 30, priced at $268 found 6 days ago

Find the cheapest month to fly from Houston (HOU) to Washington (IAD)

March is typically the cheapest month to fly

From $143 - $501 per traveler.

Graph displaying average flight prices per month

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Ronald Reagan Washington National DCA. Closest option available. Average driving time to city center is 8 minutes. Flights from $258
DCA
Ronald Reagan Washington National
Closest
Average driving time to city center8 min
Flights from $258
Flights from Houston (IAH) to Washington (IAD)
Origin airport
George Bush Intercontinental
Destination airport
Washington Dulles Intl.
Airlines serving
American Airlines, Delta, Southwest Airlines
Roundtrip price
$202
Distance
1189 mi

Houston to Washington Flights

The cheapest times to fly from Houston to Washington

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Houston to Washington are during the month of August. You can find some of the cheapest flights from Houston to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Houston to Washington

Sunday is one of the best days to book for cheap flights from Houston to Washington: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Houston to Washington

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Houston to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $149 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Houston to Washington flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Houston to Washington airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from William P. Hobby Airport (HOU) to Washington Dulles Intl. Airport (IAD) cost?
Discover the latest flight deals from HOU to IAD by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from HOU to IAD?
The cheapest flights from HOU to IAD are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from William P. Hobby Airport (HOU) to Washington Dulles Intl. Airport (IAD)?
Direct flights aren't available from Houston, TX (HOU-William P. Hobby) to Washington Dulles Intl. Airport (IAD). However, you'll find other airports with nonstop flights. Hop on your plane at George Bush Intercontinental Airport (IAH) and travel straight to Washington without any detours.
What is the cheapest airline that flies from HOU to IAD?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from HOU to IAD. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from William P. Hobby Airport (HOU) to Washington Dulles Intl. Airport (IAD)?
There aren't any daily direct flights available from William P. Hobby Airport (HOU) to Washington Dulles Intl. Airport (IAD). But you can opt for flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be on your way before you know it.
What day of the week has the most flights from HOU to IAD?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can vary based on a range of factors, including the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from William P. Hobby Airport (HOU) to Washington Dulles Intl. Airport (IAD)?
To arrive at Washington Dulles Intl. Airport (IAD) without delays, choose a flight that takes off from William P. Hobby Airport (HOU) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Washington from William P. Hobby Airport (HOU)?
You can arrive at Ronald Reagan Washington National Airport (DCA) or Baltimore Washington Intl. Thurgood Marshall Airport (BWI) when traveling to Washington on a direct flight from William P. Hobby Airport (HOU).
Is it cheaper to buy a plane ticket from William P. Hobby Airport (HOU) to Washington Dulles Intl. Airport (IAD) last-minute?
Holding off until right before your break to book your flight from HOU to IAD often results in higher prices. While you may come across some last-minute discounts, they're not always guaranteed. Allow some flexibility in your schedule to maximize your chances of getting a bargain.
Is it cheaper to book a HOU to IAD flight and hotel package?
Compared with arranging flights and hotels separately, booking a HOU to IAD flight and hotel package with Expedia could result in significant savings. Better yet, having it all in one place takes the hassle out of travel planning. Simply pick your flights and choose from our extensive range of stays, then tailor your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from William P. Hobby Airport (HOU) to Washington Dulles Intl. Airport (IAD)?
Typically, it's possible to cancel or reschedule your HOU to IAD flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.