$149 Cheap United flights Washington (IAD) to Houston (IAH)

View $149 flight on Wed, Nov 19, 2025Opens in a new window

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$149 Cheap United flights Washington (IAD) to Houston (IAH)

Prices were available within the past 7 days and start at $149 for one-way flights and $242 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Sep 18 - Mon, Sep 22
IAD
Washington
IAH
Houston
$242 Roundtrip, just found
$242
Roundtrip
just found
Select United flight, departing Thu, Sep 18 from Washington to Houston, returning Mon, Sep 22, priced at $242 just found
United
Fri, Sep 5 - Mon, Sep 8
IAD
Washington
IAH
Houston
$244 Roundtrip, just found
$244
Roundtrip
just found
Select United flight, departing Fri, Sep 5 from Washington to Houston, returning Mon, Sep 8, priced at $244 just found
United
Fri, Oct 31 - Tue, Nov 4
IAD
Washington
IAH
Houston
$250 Roundtrip, found 1 hour ago
$250
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Oct 31 from Washington to Houston, returning Tue, Nov 4, priced at $250 found 1 hour ago
United
Tue, Nov 11 - Sat, Nov 15
IAD
Washington
IAH
Houston
$252 Roundtrip, found 1 hour ago
$252
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Nov 11 from Washington to Houston, returning Sat, Nov 15, priced at $252 found 1 hour ago
United
Fri, Nov 14 - Mon, Nov 17
IAD
Washington
IAH
Houston
$255 Roundtrip, just found
$255
Roundtrip
just found
Select United flight, departing Fri, Nov 14 from Washington to Houston, returning Mon, Nov 17, priced at $255 just found
United
Wed, Oct 29 - Sun, Nov 2
IAD
Washington
IAH
Houston
$257 Roundtrip, found 1 hour ago
$257
Roundtrip
found 1 hour ago
Select United flight, departing Wed, Oct 29 from Washington to Houston, returning Sun, Nov 2, priced at $257 found 1 hour 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 35 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 $242 from IAD to IAH by sorting your results from "Price (lowest to highest)" on Expedia. Or look for deals from $149 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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