$77 Cheap Flights from Washington (IAD) to Houston (IAH)

View $77 flight on Thu, Nov 13, 2025Opens in a new window

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

Cheap Flights from Washington to Houston (IAD-IAH)

Prices were available within the past 7 days and start at $77 for one-way flights and $154 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sun, Oct 26 - Thu, Oct 30
IAD
Washington
IAH
Houston
$154 Roundtrip, just found
$154
Roundtrip
just found
Select Frontier Airlines flight, departing Sun, Oct 26 from Washington to Houston, returning Thu, Oct 30, priced at $154 just found
Frontier Airlines
Thu, Oct 16 - Wed, Oct 22
IAD
Washington
IAH
Houston
$161 Roundtrip, just found
$161
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Oct 16 from Washington to Houston, returning Wed, Oct 22, priced at $161 just found
Frontier Airlines
Thu, Oct 30 - Mon, Nov 3
IAD
Washington
IAH
Houston
$168 Roundtrip, just found
$168
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Oct 30 from Washington to Houston, returning Mon, Nov 3, priced at $168 just found
Frontier Airlines
Sun, Nov 16 - Mon, Nov 17
IAD
Washington
IAH
Houston
$173 Roundtrip, found 16 hours ago
$173
Roundtrip
found 16 hours ago
Select Frontier Airlines flight, departing Sun, Nov 16 from Washington to Houston, returning Mon, Nov 17, priced at $173 found 16 hours ago
Frontier Airlines
Thu, Oct 30 - Sun, Nov 2
IAD
Washington
IAH
Houston
$178 Roundtrip, just found
$178
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Oct 30 from Washington to Houston, returning Sun, Nov 2, priced at $178 just found
Frontier Airlines
Thu, Oct 30 - Sun, Nov 2
IAD
Washington
IAH
Houston
$185 Roundtrip, just found
$185
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Oct 30 from Washington to Houston, returning Sun, Nov 2, priced at $185 just found
United
Wed, Nov 5 - Thu, Nov 13
IAD
Washington
IAH
Houston
$213 Roundtrip, just found
$213
Roundtrip
just found
Select United flight, departing Wed, Nov 5 from Washington to Houston, returning Thu, Nov 13, priced at $213 just found
Delta
Wed, Nov 5 - Thu, Nov 13
IAD
Washington
IAH
Houston
$223 Roundtrip, just found
$223
Roundtrip
just found
Select Delta flight, departing Wed, Nov 5 from Washington to Houston, returning Thu, Nov 13, priced at $223 just found
American Airlines
Mon, Nov 24 - Wed, Dec 3
IAD
Washington
IAH
Houston
$271 Roundtrip, found 2 hours ago
$271
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Mon, Nov 24 from Washington to Houston, returning Wed, Dec 3, priced at $271 found 2 hours ago
Alaska Airlines
Fri, Dec 5 - Sat, Dec 13
IAD
Washington
IAH
Houston
$495 Roundtrip, just found
$495
Roundtrip
just found
Select Alaska Airlines flight, departing Fri, Dec 5 from Washington to Houston, returning Sat, Dec 13, priced at $495 just found

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

September is typically the cheapest month to fly

From $131 - $381 per traveler.

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 $202
IAH
George Bush Intercontinental
Cheapest
Average driving time to city center24 min
Flights from $202
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
$148
Distance
1189 mi
Average flight time
3 hours 58 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 October. 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 $77 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?
Lock in a cheap one-way flight from $77 or cheap return flight from $154 from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH) 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 Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH)?
The cheapest month to fly from IAD to IAH is October, when there's less demand. Off-peak season is often when airlines offer lower prices between these airports.
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 Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest IAD to IAH flight.
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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*Available to One Key members.