$139 Cheap United flights Washington (IAD) to Houston (IAH)

View $139 flight on Fri, Sep 5, 2025Opens in a new window

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$139 Cheap United flights Washington (IAD) to Houston (IAH)

Prices were available within the past 7 days and start at $139 for one-way flights and $243 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Oct 25 - Sat, Nov 1
IAD
Washington
IAH
Houston
$243 Roundtrip, just found
$243
Roundtrip
just found
Select United flight, departing Sat, Oct 25 from Washington to Houston, returning Sat, Nov 1, priced at $243 just found
United
Sat, Aug 30 - Sat, Sep 6
IAD
Washington
IAH
Houston
$255 Roundtrip, just found
$255
Roundtrip
just found
Select United flight, departing Sat, Aug 30 from Washington to Houston, returning Sat, Sep 6, priced at $255 just found
United
Wed, Sep 10 - Sat, Sep 20
IAD
Washington
IAH
Houston
$256 Roundtrip, found 17 hours ago
$256
Roundtrip
found 17 hours ago
Select United flight, departing Wed, Sep 10 from Washington to Houston, returning Sat, Sep 20, priced at $256 found 17 hours ago
United
Sat, Oct 18 - Sat, Oct 25
IAD
Washington
IAH
Houston
$259 Roundtrip, just found
$259
Roundtrip
just found
Select United flight, departing Sat, Oct 18 from Washington to Houston, returning Sat, Oct 25, priced at $259 just found
United
Wed, Sep 24 - Wed, Oct 1
IAD
Washington
IAH
Houston
$260 Roundtrip, just found
$260
Roundtrip
just found
Select United flight, departing Wed, Sep 24 from Washington to Houston, returning Wed, Oct 1, priced at $260 just found
United
Sat, Aug 30 - Tue, Sep 9
IAD
Washington
IAH
Houston
$261 Roundtrip, found 17 hours ago
$261
Roundtrip
found 17 hours ago
Select United flight, departing Sat, Aug 30 from Washington to Houston, returning Tue, Sep 9, priced at $261 found 17 hours ago
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
Popular airline
Frontier Airlines
Distance
1189 mi
Average flight time
2 hours 39 mins

Frequently asked questions

How much is a United Airlines flight from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH)?
You can find affordable round-trip United Airlines flights from $243 from IAD to IAH by sorting your results from "Price (lowest to highest)" on Expedia. Or look for deals from $139 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from IAD to IAH with United Airlines?
Look for one-way or round-trip flights to Houston in November or February. You could find an affordable fare with United Airlines during these off-peak travel months.
What is the cheapest time to book flights from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH) with United Airlines?
To find cheap United Airlines fares from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH), start searching one to three months before your intended departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact the price you pay. Sunday tends to be the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by choosing to book on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH)?
Skip the layovers and fly from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH) on one of United Airlines's 28 direct weekly flights. Apply Expedia's "Nonstop" and "Airline" filters to find the United Airlines flight that'll get you to IAH at your preferred time.
How long does it take to fly from IAD to IAH with United Airlines?
It takes around 3h 39m to fly nonstop from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH) with United Airlines.
Which day of the week has the most United Airlines flights from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH)?
United Airlines has the most flights from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH) on Monday. With up to 4 daily departures, you'll get the most flexibility on this day.
What is the earliest United Airlines flight from IAD to IAH?
Departing IAD at 6:00AM UTC-5, the first United Airlines flight to IAH lands at 8:39AM UTC-6. Flying earlier in the day means you're less likely to encounter cancellations or delays.* Not an early riser? The last United Airlines flight from IAD to IAH departs at 5:33PM UTC-5 and touches down at 8:10PM UTC-6.*Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Houston?
United Airlines flights from Washington Dulles Intl. Airport (IAD) to Houston land at George Bush Intercontinental Airport (IAH). This is the main entry point here.
Why fly with United Airlines from IAD to IAH?
A rewarding loyalty program and the opportunity to collect points through United Mileage Plus are the start of the reasons to leave from IAD to IAH with United Airlines. Plus, when you join Expedia's free One Key™ program, you can receive OneKeyCash™* on top of any airline loyalty program earnings. It's yours to spend on future travel plans.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
What type of plane does United Airlines fly from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH)?
You'll likely board a Boeing 767-300 or an Airbus A320 when flying United Airlines from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH). However, keep in mind that a different plane may be assigned due to operational demands.
Can I change or cancel my United Airlines flight from Washington Dulles Intl. Airport (IAD) to George Bush Intercontinental Airport (IAH)?
It's generally possible to reschedule or cancel your flight, although additional fees may apply if your booking was made more than 24 hours ago. Need flexible options? Apply the "Changes included" and "No cancel fee" filters to find flights that won't penalize you if you have to adjust your plans. To update your itinerary, visit "Trips," select your flight and click on "Manage Booking" for more details.

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