$149 Cheap Delta flights Washington (DCA) to Houston (IAH)

View $149 flight on Sat, Nov 15, 2025Opens in a new window

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$149 Cheap Delta flights Washington (DCA) to Houston (IAH)

Prices were available within the past 7 days and start at $149 for one-way flights and $273 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Aug 30 - Sat, Sep 13
DCA
Washington
IAH
Houston
$273 Roundtrip, just found
$273
Roundtrip
just found
Select Delta flight, departing Sat, Aug 30 from Washington to Houston, returning Sat, Sep 13, priced at $273 just found
Delta
Sun, Sep 28 - Wed, Oct 1
DCA
Washington
IAH
Houston
$278 Roundtrip, found 1 hour ago
$278
Roundtrip
found 1 hour ago
Select Delta flight, departing Sun, Sep 28 from Washington to Houston, returning Wed, Oct 1, priced at $278 found 1 hour ago
Delta
Sat, Sep 27 - Tue, Sep 30
DCA
Washington
IAH
Houston
$296 Roundtrip, found 1 hour ago
$296
Roundtrip
found 1 hour ago
Select Delta flight, departing Sat, Sep 27 from Washington to Houston, returning Tue, Sep 30, priced at $296 found 1 hour 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 Delta Air Lines flight from Ronald Reagan Washington National Airport (DCA) to George Bush Intercontinental Airport (IAH)?
Apply the "Price (lowest to highest)" filter on Expedia to search for cheap Delta Air Lines return flights from $273 from DCA to IAH. Affordable one-way fares from $149 are available too.**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 Delta Air Lines?
Delta Air Lines flights to Houston are often more affordable in the quieter months of November and February. Whether you're searching for a round-trip or one-way ticket, you could land a better deal then.
What is the cheapest time to book flights from Ronald Reagan Washington National Airport (DCA) to George Bush Intercontinental Airport (IAH) with Delta Air Lines?
Search for cheap Delta Air Lines flights from Ronald Reagan Washington National Airport (DCA) to George Bush Intercontinental Airport (IAH) one to three months ahead of your departure. 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 journey, the best day to book a domestic flight is generally Sunday and the most expensive is typically 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 Delta Air Lines fly nonstop from Ronald Reagan Washington National Airport (DCA) to George Bush Intercontinental Airport (IAH)?
Fill in your dates, press search and tick the "Nonstop" filter on Expedia to browse any direct flights from DCA to IAH with Delta Air Lines or other airlines.
What is the earliest Delta Air Lines flight from DCA to IAH?
Sort your results by "Morning" and "Early Morning" to see the earliest flights from DCA to IAH. Heading off early means you're 20% less likely to experience cancellations.**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 Delta Air Lines fly into in Houston?
Get on a Delta Air Lines flight from Ronald Reagan Washington National Airport (DCA) to Houston, and you'll most likely touch down at George Bush Intercontinental Airport (IAH). This is the airline's primary hub in this destination.
Why fly with Delta Air Lines from DCA to IAH?
With a rewarding loyalty program and an excellent in-flight experience, Delta Air Lines is a favorite for many travelers heading from DCA to IAH. What's more, if you're a Delta SkyMiles and One Key™ member booking with Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can be used on future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Delta Air Lines flight from Ronald Reagan Washington National Airport (DCA) to George Bush Intercontinental Airport (IAH)?
You can usually cancel or reschedule your flight, although there may be additional charges if you booked over 24 hours ago. Prefer to keep your options open? Use our "Changes included" or "No cancel fee" filter to find flights that won't charge extra if you have to revise your plans. To make modifications, visit "Trips," select your flight and click on "Manage Booking" for more details.

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*Available to One Key members.