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

View $139 flight on Sat, Aug 23, 2025Opens in a new window

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

Prices were available within the past 7 days and start at $139 for one-way flights and $268 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Wed, Sep 24 - Sat, Oct 4
IAH
Houston
DCA
Washington
$268 Roundtrip, found 4 hours ago
$268
Roundtrip
found 4 hours ago
Select United flight, departing Wed, Sep 24 from Houston to Washington, returning Sat, Oct 4, priced at $268 found 4 hours ago
United
Thu, Oct 23 - Sat, Oct 25
IAH
Houston
DCA
Washington
$277 Roundtrip, found 22 hours ago
$277
Roundtrip
found 22 hours ago
Select United flight, departing Thu, Oct 23 from Houston to Washington, returning Sat, Oct 25, priced at $277 found 22 hours ago
United
Sat, Aug 23 - Sun, Aug 24
IAH
Houston
DCA
Washington
$277 Roundtrip, just found
$277
Roundtrip
just found
Select United flight, departing Sat, Aug 23 from Houston to Washington, returning Sun, Aug 24, priced at $277 just found
United
Sat, Sep 27 - Sat, Oct 4
IAH
Houston
DCA
Washington
$279 Roundtrip, found 11 hours ago
$279
Roundtrip
found 11 hours ago
Select United flight, departing Sat, Sep 27 from Houston to Washington, returning Sat, Oct 4, priced at $279 found 11 hours ago
United
Tue, Sep 23 - Fri, Sep 26
IAH
Houston
DCA
Washington
$280 Roundtrip, found 20 hours ago
$280
Roundtrip
found 20 hours ago
Select United flight, departing Tue, Sep 23 from Houston to Washington, returning Fri, Sep 26, priced at $280 found 20 hours ago
United
Sat, Sep 27 - Tue, Sep 30
IAH
Houston
DCA
Washington
$281 Roundtrip, found 20 hours ago
$281
Roundtrip
found 20 hours ago
Select United flight, departing Sat, Sep 27 from Houston to Washington, returning Tue, Sep 30, priced at $281 found 20 hours ago
Flights from Houston (IAH) to Washington (DCA)
Origin airport
George Bush Intercontinental
Destination airport
Ronald Reagan Washington National
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, United
Popular airline
United
Distance
1206 mi
Average flight time
4 hours 10 mins

Frequently asked questions

How much is a United Airlines flight from George Bush Intercontinental Airport (IAH) to Ronald Reagan Washington National Airport (DCA)?
You'll find affordable round-trip United Airlines flights from $268 from IAH to DCA by filtering your results from "Price (lowest to highest)" on Expedia. Or look for options 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 IAH to DCA with United Airlines?
United Airlines flights to Washington are often more affordable in the low-season months of January and February. Whether you need a one-way or round-trip ticket, you could score a better deal then.
What is the cheapest time to book flights from George Bush Intercontinental Airport (IAH) to Ronald Reagan Washington National Airport (DCA) with United Airlines?
Start searching one to three months ahead of your departure date to get cheaper fares on United Airlines flights from George Bush Intercontinental Airport (IAH) to Ronald Reagan Washington National Airport (DCA). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Time it well, and you can enjoy significant savings on domestic flights.*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 George Bush Intercontinental Airport (IAH) to Ronald Reagan Washington National Airport (DCA)?
Take off on one of United Airlines's 47 weekly direct flights from George Bush Intercontinental Airport (IAH) to Ronald Reagan Washington National Airport (DCA). To see your options, enter your dates, origin and destination and hit search. Then apply the "Nonstop" and "Airline" filters.
How long does it take to fly from IAH to DCA with United Airlines?
Leave George Bush Intercontinental Airport (IAH) for Ronald Reagan Washington National Airport (DCA) on a direct United Airlines flight, and you'll be airborne for approximately 2h 59m.
Which day of the week has the most United Airlines flights from George Bush Intercontinental Airport (IAH) to Ronald Reagan Washington National Airport (DCA)?
If you're looking for flexibility, Thursday offers the most choice for United Airlines flights from George Bush Intercontinental Airport (IAH) to Ronald Reagan Washington National Airport (DCA). You can pick from 7 different departures.
What is the earliest United Airlines flight from IAH to DCA?
The first United Airlines flight from IAH to DCA takes off at 7:33AM UTC-6, landing at 11:31AM UTC-5. If you want to set off later in the day, the last United Airlines flight leaves IAH at 7:59PM UTC-6 and lands at DCA at 11:59PM UTC-5. Flying before midday is often a good idea as morning flights are less likely to be canceled.**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 Washington?
United Airlines flights from George Bush Intercontinental Airport (IAH) to Washington land at Ronald Reagan Washington National Airport (DCA), Washington Dulles Intl. Airport (IAD) and Baltimore Washington Intl. Thurgood Marshall Airport (BWI). The primary Washington gateway for this carrier is DCA. It's worth considering flights landing at other nearby airports on Expedia as they may offer cheaper fares.
Why fly with United Airlines from IAH to DCA?
A rewarding loyalty program and the chance to rack up points through United Mileage Plus are the start of the reasons to fly from IAH to DCA with United Airlines. Plus, when you join our One Key™ program, you can receive OneKeyCash™* on top of any airline loyalty program earnings. You can put it toward your future trips.*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 George Bush Intercontinental Airport (IAH) to Ronald Reagan Washington National Airport (DCA)?
United Airlines generally flies Airbus A319 planes for flights from George Bush Intercontinental Airport (IAH) to Ronald Reagan Washington National Airport (DCA). This carrier also operates the Boeing 737-700 on this route. Bear in mind that aircraft type can vary due to operational reasons, so the plane you catch might be different when you travel.
Can I change or cancel my United Airlines flight from George Bush Intercontinental Airport (IAH) to Ronald Reagan Washington National Airport (DCA)?
Changes are typically free within 24 hours of booking, but your airline may charge you after that. For more details about modifying your flights, head to your "Trips," select your flight and click on "Manage Booking." If you want the flexibility to change your itinerary without additional charges, apply the "No cancel fee" or "Changes included" filter when organizing your trip.
*Available to One Key members.