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

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

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

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

Prices were available within the past 7 days and start at $149 for one-way flights and $255 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Oct 30 - Fri, Oct 31
IAH
Houston
IAD
Washington
$255 Roundtrip, just found
$255
Roundtrip
just found
Select United flight, departing Thu, Oct 30 from Houston to Washington, returning Fri, Oct 31, priced at $255 just found
United
Tue, Nov 18 - Wed, Nov 19
IAH
Houston
IAD
Washington
$297 Roundtrip, just found
$297
Roundtrip
just found
Select United flight, departing Tue, Nov 18 from Houston to Washington, returning Wed, Nov 19, priced at $297 just found
Flights from Houston (IAH) to Washington (IAD)
Origin airport
George Bush Intercontinental
Destination airport
Washington Dulles Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, United
Popular airline
Frontier Airlines
Distance
1189 mi
Average flight time
5 hours 15 mins

Frequently asked questions

How much is a United Airlines flight from George Bush Intercontinental Airport (IAH) to Washington Dulles Intl. Airport (IAD)?
Grab budget-friendly return United Airlines flights from $255 from IAH to IAD by organizing your results from "Price (lowest to highest)" on Expedia. Or search for options 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 IAH to IAD with United Airlines?
Look for one-way or round-trip flights to Washington in January or February. You could find a cheap fare with United Airlines during these quieter months.
What is the cheapest time to book flights from George Bush Intercontinental Airport (IAH) to Washington Dulles Intl. Airport (IAD) with United Airlines?
Look for cheap United Airlines flights from George Bush Intercontinental Airport (IAH) to Washington Dulles Intl. Airport (IAD) one to three months ahead of your departure day. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare class and itinerary, the best day of the week to book a domestic flight is usually Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**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 Washington Dulles Intl. Airport (IAD)?
Choose from one of United Airlines's 28 weekly direct flights from George Bush Intercontinental Airport (IAH) to Washington Dulles Intl. Airport (IAD). To see your choices, enter your origin, dates and destination and hit search. Then apply the "Nonstop" and "Airline" filters.
How long does it take to fly from IAH to IAD with United Airlines?
On average, it takes 3h 2m to travel nonstop from George Bush Intercontinental Airport (IAH) to Washington Dulles Intl. Airport (IAD) with United Airlines.
Which day of the week has the most United Airlines flights from George Bush Intercontinental Airport (IAH) to Washington Dulles Intl. Airport (IAD)?
United Airlines operates the most flights from George Bush Intercontinental Airport (IAH) to Washington Dulles Intl. Airport (IAD) on Wednesday. With up to 4 daily departures, you'll get the most choice and flexibility on this day.
What is the earliest United Airlines flight from IAH to IAD?
The earliest flight from IAH to IAD with United Airlines departs at 7:45AM UTC-6. You'll touch down at 11:49AM UTC-5. The final United Airlines flight of the day leaves at 6:05PM UTC-6 and arrives at 10:09PM UTC-5. With approximately 20% fewer cancellations for early and mid-morning flights, heading out early is typically the best way to go.**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 Washington Dulles Intl. Airport (IAD), Ronald Reagan Washington National Airport (DCA) and Baltimore Washington Intl. Thurgood Marshall Airport (BWI). The primary Washington gateway served by this carrier is IAD. It's always worth considering flights landing at other nearby airports on Expedia as they may have lower prices.
Why fly with United Airlines from IAH to IAD?
Offering a rewarding loyalty program, United Airlines is a favorite of many travelers journeying from IAH to IAD. Plus, as a United Mileage Plus and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights on top of your airline miles.*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 Washington Dulles Intl. Airport (IAD)?
You'll likely be on a Boeing 767-300 or an Airbus A320 when flying United Airlines from George Bush Intercontinental Airport (IAH) to Washington Dulles Intl. Airport (IAD). However, keep in mind that a different plane may be used due to operational factors.
Can I change or cancel my United Airlines flight from George Bush Intercontinental Airport (IAH) to Washington Dulles Intl. Airport (IAD)?
Changes are often free within 24 hours of making your booking, but your airline may add a charge after that time. For more information about modifying your reservation, check out your "Trips," select your flight and click on "Manage Booking." If you'd like the flexibility to update your itinerary without extra charges, apply the "Changes included" and "No cancel fee" filters when organizing your next getaway.

Explore a world of travel with Expedia

*Available to One Key members.