$104 Cheap Flights from Washington (IAD) to Houston (IAH)

View $104 flight on Sat, Aug 16, 2025Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH)

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Cheap Flights from Washington to Houston (IAD-IAH)

Prices were available within the past 7 days and start at $104 for one-way flights and $208 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Wed, Aug 6 - Sat, Aug 9
IAD
Washington
IAH
Houston
$208 Roundtrip, just found
$208
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, Aug 6 from Washington to Houston, returning Sat, Aug 9, priced at $208 just found
Frontier Airlines
Wed, Aug 6 - Fri, Aug 8
IAD
Washington
IAH
Houston
$218 Roundtrip, just found
$218
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, Aug 6 from Washington to Houston, returning Fri, Aug 8, priced at $218 just found
Frontier Airlines
Fri, Aug 22 - Mon, Aug 25
IAD
Washington
IAH
Houston
$228 Roundtrip, just found
$228
Roundtrip
just found
Select Frontier Airlines flight, departing Fri, Aug 22 from Washington to Houston, returning Mon, Aug 25, priced at $228 just found
United
Thu, Oct 23 - Sat, Oct 25
IAD
Washington
IAH
Houston
$243 Roundtrip, found 1 hour ago
$243
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Oct 23 from Washington to Houston, returning Sat, Oct 25, priced at $243 found 1 hour ago
Frontier Airlines
Mon, Aug 4 - Tue, Aug 5
IAD
Washington
IAH
Houston
$248 Roundtrip, just found
$248
Roundtrip
just found
Select Frontier Airlines flight, departing Mon, Aug 4 from Washington to Houston, returning Tue, Aug 5, priced at $248 just found
Frontier Airlines
Tue, Aug 5 - Sat, Aug 23
IAD
Washington
IAH
Houston
$250 Roundtrip, found 2 days ago
$250
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Tue, Aug 5 from Washington to Houston, returning Sat, Aug 23, priced at $250 found 2 days ago
Delta
Thu, Oct 16 - Sat, Oct 18
IAD
Washington
IAH
Houston
$253 Roundtrip, found 1 hour ago
$253
Roundtrip
found 1 hour ago
Select Delta flight, departing Thu, Oct 16 from Washington to Houston, returning Sat, Oct 18, priced at $253 found 1 hour ago
United
Thu, Sep 18 - Sat, Sep 20
IAD
Washington
IAH
Houston
$255 Roundtrip, found 1 hour ago
$255
Roundtrip
found 1 hour ago
Select United flight, departing Thu, Sep 18 from Washington to Houston, returning Sat, Sep 20, priced at $255 found 1 hour ago
American Airlines
Sat, Nov 1 - Wed, Nov 5
IAD
Washington
IAH
Houston
$333 Roundtrip, just found
$333
Roundtrip
just found
Select American Airlines flight, departing Sat, Nov 1 from Washington to Houston, returning Wed, Nov 5, priced at $333 just found
Alaska Airlines
Wed, Aug 13 - Thu, Aug 21
IAD
Washington
IAH
Houston
$618 Roundtrip, found 9 hours ago
$618
Roundtrip
found 9 hours ago
Select Alaska Airlines flight, departing Wed, Aug 13 from Washington to Houston, returning Thu, Aug 21, priced at $618 found 9 hours ago

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

April is typically the cheapest month to fly

From $123 - $339 per traveler.

Graph displaying average flight prices per month

Alternative airports near Houston

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

Select flight to George Bush Intercontinental IAH. Cheapest option available. Average driving time to city center is 24 minutes. Flights from $228
IAH
George Bush Intercontinental
Cheapest
Average driving time to city center24 min
Flights from $228
Flights from Washington (IAD) to Houston (IAH)
Origin airport
Washington Dulles Intl.
Destination airport
George Bush Intercontinental
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, United
Roundtrip price
$202
Distance
1189 mi
Average flight time
2 hours 39 mins

Washington to Houston Flights

The cheapest times to fly from Washington to Houston

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 Washington to Houston are during the month of August. You can find some of the cheapest flights from Washington to Houston with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Houston

Sunday is one of the best days to book for cheap flights from Washington to Houston: 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 Washington to Houston

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 Washington to Houston in 2025. You can also book with separate airlines for your outbound and return journeys, from $104 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 Washington to Houston 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 Washington to Houston 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 Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH) cost?
Grab cheap return tickets starting from $145 from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a United and Spirit Airlines flight leaving IAD on August 14 2025 and touching down at IAH. The price was last updated on July 23 2025 and has not changed since.
What is the cheapest month to fly from IAD to IAH?
The cheapest flights from IAD to IAH 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 Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH)?
Board a nonstop flight with United Airlines and head straight from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH).
What is the cheapest airline that flies from IAD to IAH?
Currently, the cheapest carrier operating one-way flights from IAD to IAH is United. You can jet off on this route from $105. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from IAD on October 18 2025. Prices were last updated on July 23 2025 and have not changed since.
How many flights per day from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH)?
With an average of 4 direct flights that operate from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH) each day, you'll be taking off on vacation soon enough.
What are the most popular departure times for flights from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH)?
Flights between IAD and IAH are their busiest at 8 AM. If you want a more relaxed trip and potentially cheaper fares, choose a time outside the usual busy windows.
What day of the week has the most flights from IAD to IAH?
If you fly on a Friday, you'll get the widest range of options for flights from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH).
What is the earliest flight from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH)?
The first flight of the day jetting off from Washington Dulles Intl. Airport (IAD) is at around 6:00AM UTC-5. Hop on this flight and you'll arrive at George Bush Intercontinental Airport (IAH) at approximately 8:39AM UTC-6. The total travel time is 3h 39m.
How long does it take to fly from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH)?
It usually takes 3 hours and 39 minutes to travel the 1,200 mi from IAD to IAH.
What airline has the least delays from IAD to IAH?
United Airlines has the best track record for on-time direct flights from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH), with an on-time rating of 84%. Use the Expedia App to look up your journey status before you go and get notified of any trip changes.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH)?
To reach George Bush Intercontinental Airport (IAH) on time, pick a flight that takes off from Washington Dulles Intl. Airport (IAD) 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 Houston from Washington Dulles Intl. Airport (IAD)?
If you're flying on a direct flight from Washington Dulles Intl. Airport (IAD) to Houston, George Bush Intercontinental Airport (IAH) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH) last-minute?
Last-minute fares from IAD to IAH are typically more expensive. To lock in the best prices, start looking for flights early. That being said, if your travel plans are flexible, it's possible to find a cheap ticket right before your trip.
Is it cheaper to book an IAD to IAH flight and hotel package?
You'll typically save money by booking an IAD to IAH flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. Once you've chosen your preferred accommodations and flights, consider other add-ons like car rentals, tours and activities.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH)?
If you reserved your IAD to IAH flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more information.

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