$154 Cheap Flights from Houston (HOU) to Washington (IAD)

View $154 flight on Sat, Feb 21, 2026Opens in a new window

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

Cheap Flights from Houston to Washington (HOU-IAD)

Prices were available within the past 7 days and start at $154 for one-way flights and $322 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, Jan 1 - Wed, Jan 7
HOU
Houston
IAD
Washington
$322 Roundtrip, found 6 days ago
$322
Roundtrip
found 6 days ago
Select Delta flight, departing Thu, Jan 1 from Houston to Washington, returning Wed, Jan 7, priced at $322 found 6 days ago
Southwest Airlines
Mon, Nov 24 - Thu, Nov 27
HOU
Houston
IAD
Washington
$367 Roundtrip, found 18 hours ago
$367
Roundtrip
found 18 hours ago
Select Southwest Airlines flight, departing Mon, Nov 24 from Houston to Washington, returning Thu, Nov 27, priced at $367 found 18 hours ago

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

August is typically the cheapest month to fly

From $131 - $295 per traveler.

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 $442
DCA
Ronald Reagan Washington National
Closest
Average driving time to city center8 min
Flights from $442

Frequently asked questions

How much does a flight from William P. Hobby Airport (HOU) to Washington Dulles Intl. Airport (IAD) cost?
Lock in a cheap one-way flight from $154 or cheap return flight from $322 from William P. Hobby Airport (HOU) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from William P. Hobby Airport (HOU) to Washington Dulles Intl. Airport (IAD)?
January is the most affordable month to fly from HOU to IAD. Traveling outside of peak seasons is often the key to finding a great deal.
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 William P. Hobby Airport (HOU) to Washington Dulles Intl. Airport (IAD)?
To find the cheapest airline flying from HOU to IAD, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
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.

Travel information

Origin airport
William P. Hobby
Destination airport
Washington Dulles Intl.
Airlines serving
American Airlines, Delta, Southwest Airlines
Roundtrip price
$322
Distance
1199 mi

Book with confidence

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 January. 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 $154 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.

 

Houston to Washington Flights

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*Available to One Key members.