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

View $139 flight on Mon, Aug 25, 2025Opens in a new window

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

Prices were available within the past 7 days and start at $139 for one-way flights and $225 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Dec 17 - Tue, Dec 30
DCA
Washington
IAH
Houston
$225 Roundtrip, found 6 days ago
$225
Roundtrip
found 6 days ago
Select United flight, departing Wed, Dec 17 from Washington to Houston, returning Tue, Dec 30, priced at $225 found 6 days ago
United
Wed, Dec 17 - Tue, Dec 30
DCA
Washington
IAH
Houston
$228 Roundtrip, found 6 days ago
$228
Roundtrip
found 6 days ago
Select United flight, departing Wed, Dec 17 from Washington to Houston, returning Tue, Dec 30, priced at $228 found 6 days ago
United
Wed, Dec 17 - Tue, Dec 30
DCA
Washington
IAH
Houston
$234 Roundtrip, found 6 days ago
$234
Roundtrip
found 6 days ago
Select United flight, departing Wed, Dec 17 from Washington to Houston, returning Tue, Dec 30, priced at $234 found 6 days ago
United
Thu, Dec 18 - Tue, Dec 23
DCA
Washington
IAH
Houston
$248 Roundtrip, found 5 days ago
$248
Roundtrip
found 5 days ago
Select United flight, departing Thu, Dec 18 from Washington to Houston, returning Tue, Dec 23, priced at $248 found 5 days ago
United
Mon, Sep 22 - Wed, Sep 24
DCA
Washington
IAH
Houston
$270 Roundtrip, found 5 hours ago
$270
Roundtrip
found 5 hours ago
Select United flight, departing Mon, Sep 22 from Washington to Houston, returning Wed, Sep 24, priced at $270 found 5 hours ago
United
Sun, Oct 5 - Tue, Oct 7
DCA
Washington
IAH
Houston
$277 Roundtrip, found 5 hours ago
$277
Roundtrip
found 5 hours ago
Select United flight, departing Sun, Oct 5 from Washington to Houston, returning Tue, Oct 7, priced at $277 found 5 hours ago
Flights from Washington (DCA) to Houston (IAH)
Origin airport
Ronald Reagan Washington National
Destination airport
George Bush Intercontinental
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, United
Popular airline
United
Distance
1206 mi
Average flight time
2 hours 17 mins

Frequently asked questions

How much is a United Airlines flight from Ronald Reagan Washington National Airport (DCA) to George Bush Intercontinental Airport (IAH)?
Landing cheap one-way United Airlines flights from DCA to IAH from $139 on Expedia is easy — just filter by "Price (lowest to highest)." Alternatively, check out our affordable round-trip fares from $225 for your next break.**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 DCA to IAH with United Airlines?
Look for one-way or round-trip flights to Houston in November or February. You could find a cheap fare with United Airlines during these quieter months.
What is the cheapest time to book flights from Ronald Reagan Washington National Airport (DCA) to George Bush Intercontinental Airport (IAH) with United Airlines?
For cheap United Airlines fares from Ronald Reagan Washington National Airport (DCA) to George Bush Intercontinental Airport (IAH), start searching one to three months before your intended departure. Reserving 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 affect the cost. Sunday is usually the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your flight 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 Ronald Reagan Washington National Airport (DCA) to George Bush Intercontinental Airport (IAH)?
You can easily fly from Ronald Reagan Washington National Airport (DCA) to George Bush Intercontinental Airport (IAH) on one of United Airlines's 47 direct weekly flights. Make use of our "Nonstop" and "Airline" filters to find the United Airlines flight that'll get you to IAH at a time that suits you.
How long does it take to fly from DCA to IAH with United Airlines?
On average, it takes 3h 41m to travel nonstop from Ronald Reagan Washington National Airport (DCA) to George Bush Intercontinental Airport (IAH) with United Airlines.
Which day of the week has the most United Airlines flights from Ronald Reagan Washington National Airport (DCA) to George Bush Intercontinental Airport (IAH)?
If it's flexibility you're after, Tuesday offers the most choice for United Airlines flights from Ronald Reagan Washington National Airport (DCA) to George Bush Intercontinental Airport (IAH). You can pick from 7 different departures.
What is the earliest United Airlines flight from DCA to IAH?
The earliest flight from DCA to IAH with United Airlines leaves at 6:00AM UTC-5. You'll touch down at 8:42AM UTC-6. The last United Airlines flight of the day takes off at 7:55PM UTC-5 and arrives at 10:36PM UTC-6. With around 20% fewer cancellations for departures before midday, heading out early is typically the best choice.**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?
The majority of United Airlines flights from Ronald Reagan Washington National Airport (DCA) to Houston land at George Bush Intercontinental Airport (IAH). This is the airline's primary gateway to this destination. It's worth checking out Expedia for flights to nearby airports like William P. Hobby Airport (HOU), as fares may be lower.
Why fly with United Airlines from DCA to IAH?
A rewarding loyalty program and the opportunity to collect points through United Mileage Plus are the start of the reasons to depart from DCA to IAH with United Airlines. Plus, when you sign up to Expedia's free One Key™ program, you can earn OneKeyCash™* in addition to 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 Ronald Reagan Washington National Airport (DCA) to George Bush Intercontinental Airport (IAH)?
You'll likely be onboard an Airbus A319 or a Boeing 737-700 when flying United Airlines from Ronald Reagan Washington National Airport (DCA) to George Bush Intercontinental Airport (IAH). However, keep in mind that a different aircraft could be assigned to your route due to operational demands.
Can I change or cancel my United Airlines flight from Ronald Reagan Washington National Airport (DCA) to George Bush Intercontinental Airport (IAH)?
Depending on the ticket type you purchased, a fee is typically charged if you cancel or reschedule your flight more than 24 hours after it's been confirmed. To secure plane tickets with more flexibility, select our "No cancel fee" or "Changes included" filter when you search for flights. To learn more about changing or canceling your reservation, go to "Trips," select your flight and click on "Manage Booking."

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