£161 Cheap Flights from Houston (IAH) to Washington (IAD)

View £161 flight on Fri, 15 May 2026Opens in a new window

Flight 1

Popular airlines from George Bush Intercontinental Airport (IAH) to Washington Dulles International Airport (IAD)

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Cheap Flights from Houston (IAH) to Washington (IAD)

Prices were available within the past 7 days and start at £161 for one-way flights and £514 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, 2 May - Sat, 9 May
IAH
Houston
IAD
Washington
£514 Return, found 4 days ago
£514
Return
found 4 days ago
Select United flight, departing Sat, 2 May from Houston to Washington, returning Sat, 9 May, priced at £514 found 4 days ago
American Airlines
Sat, 2 May - Sat, 9 May
IAH
Houston
IAD
Washington
£529 Return, found 4 days ago
£529
Return
found 4 days ago
Select American Airlines flight, departing Sat, 2 May from Houston to Washington, returning Sat, 9 May, priced at £529 found 4 days ago
Delta
Sat, 2 May - Sat, 9 May
IAH
Houston
IAD
Washington
£529 Return, found 4 days ago
£529
Return
found 4 days ago
Select Delta flight, departing Sat, 2 May from Houston to Washington, returning Sat, 9 May, priced at £529 found 4 days ago
Alaska Airlines
Fri, 29 May - Sat, 30 May
IAH
Houston
IAD
Washington
£564 Return, found 2 days ago
£564
Return
found 2 days ago
Select Alaska Airlines flight, departing Fri, 29 May from Houston to Washington, returning Sat, 30 May, priced at £564 found 2 days ago
Alaska Airlines
Tue, 11 Aug - Thu, 13 Aug
IAH
Houston
IAD
Washington
£600 Return, found 1 day ago
£600
Return
found 1 day ago
Select Alaska Airlines flight, departing Tue, 11 Aug from Houston to Washington, returning Thu, 13 Aug, priced at £600 found 1 day ago
Alaska Airlines
Fri, 29 May - Sat, 30 May
IAH
Houston
IAD
Washington
£605 Return, found 2 days ago
£605
Return
found 2 days ago
Select Alaska Airlines flight, departing Fri, 29 May from Houston to Washington, returning Sat, 30 May, priced at £605 found 2 days ago
Alaska Airlines
Wed, 20 May - Wed, 27 May
IAH
Houston
IAD
Washington
£609 Return, found 21 hours ago
£609
Return
found 21 hours ago
Select Alaska Airlines flight, departing Wed, 20 May from Houston to Washington, returning Wed, 27 May, priced at £609 found 21 hours ago
Alaska Airlines
Tue, 11 Aug - Thu, 13 Aug
IAH
Houston
IAD
Washington
£636 Return, found 1 day ago
£636
Return
found 1 day ago
Select Alaska Airlines flight, departing Tue, 11 Aug from Houston to Washington, returning Thu, 13 Aug, priced at £636 found 1 day ago
Alaska Airlines
Wed, 20 May - Wed, 27 May
IAH
Houston
IAD
Washington
£649 Return, found 21 hours ago
£649
Return
found 21 hours ago
Select Alaska Airlines flight, departing Wed, 20 May from Houston to Washington, returning Wed, 27 May, priced at £649 found 21 hours ago
Alaska Airlines
Fri, 29 May - Sat, 30 May
IAH
Houston
IAD
Washington
£653 Return, found 2 days ago
£653
Return
found 2 days ago
Select Alaska Airlines flight, departing Fri, 29 May from Houston to Washington, returning Sat, 30 May, priced at £653 found 2 days ago

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Ronald Reagan Washington National DCA. Cheapest and Closest option available. Average driving time to city centre is 8 minutes. Flights from £596
DCA
Ronald Reagan Washington National
CheapestClosest
Average driving time to city centre8 min
Flights from £596

Frequently asked questions

How much is a flight from Houston Airport to IAD?
Start packing your bags, because round-trip flights between George Bush Intercontinental Airport (IAH) and IAD start from £514. That's based on fares listed within the last 7 days on Expedia for flights departing within the next year. Prices can increase quickly, so book now to nab the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from IAH to IAD?
Most flights can be cancelled online, but each air carrier has its own set of terms and conditions. If you do need to cancel your flight, go to our Customer Service Portal and follow the instructions.
How do I find cheap flights from Houston Airport to IAD that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for George Bush Intercontinental Airport (IAH) to Washington Dulles Intl. Airport (IAD) flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Houston Airport to Washington Dulles Intl. Airport (IAD)?
It's around 1,900 kilometres between Houston Airport and Washington Dulles Intl. Airport (IAD), so expect to be in your seat for a while. Keep yourself occupied by packing things like your e-reader or the latest bestseller.
Which airlines fly direct from Houston Airport to Washington Dulles Intl. Airport (IAD)?
Flying directly from Houston Airport to IAD is simple with United Airlines (UA). This popular carrier offers 121 flights each month.
Are George Bush Intercontinental Airport (IAH) to Dulles Intl. Airport flight tickets cheaper when they're purchased at the last minute?
It is possible to nab an awesome last-minute deal from Houston Airport to IAD, but it's also possible to miss out entirely! As many airlines release seats up to 12 months in advance, it's worthwhile keeping an eye on fares early and being ready to book when you spot a bargain. Expedia compares air carrier prices and updates flight deals regularly, so you can be sure you're always seeing the latest offers.

Frequently asked questions

What is the cheapest month to fly from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.)?
February is typically the cheapest month to fly from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.), with average return fares of approximately £511. This is about 14% lower than the average price throughout the year. February often sees lower prices as it's outside of peak holiday travel seasons, leading to reduced demand. Other cheap months to fly from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.) include April and August.
Which airlines fly direct from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.)?
Enter IAH to IAD and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.)?
To find a cheap flight from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.)?
The best airline to fly with from Houston, TX (IAH-George Bush Intercontinental) (IAH) to Washington, DC (IAD-Washington Dulles Intl.) (IAD) will differ from traveller to traveller. If you like to fly early, UA offers early morning flights. If price is the most important factor, UA typically offers the lowest fares. UA offers the most daily flights from Houston, TX (IAH-George Bush Intercontinental) (IAH) to Washington, DC (IAD-Washington Dulles Intl.) (IAD), which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.)?
Based on booking data from the past year, the best time to fly from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.) depends on what you're looking for. If you're prioritising the lowest fares, February and August are typically the cheapest months, with average return flights around £511. If you're looking for the most flight options and a popular time to travel, May and September see a high volume of flights. Since there isn't an overlap between the cheapest and most popular months, you can choose based on whether price or flexibility is more important for your trip.
How many flights per day from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.)?
There are approximately 6 nonstop flights per day from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.). For even more choice, look at flights that include layovers, as there are around 84 connecting flights per day. Some common connection points include Hartsfield-Jackson Atlanta Intl. (ATL), Dallas-Fort Worth Intl. (DFW), and Portland Intl. (PDX).
What is the earliest flight from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.)?
The earliest flight from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.) typically departs at approximately 5:00 AM local time, operated by AA. This is a seasonal service active in January, February, March, April, November, and December. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.)?
If you're flying from George Bush Intercontinental (IAH) to Washington Dulles Intl. (IAD), you'll typically find the most flights on a Friday, with around 51 flights available. This gives you plenty of options for your travel plans. Friday offers notably more flight options compared to other days of the week. Major airlines on this route include United Airlines, Delta Air Lines, and American Airlines.
What are the most popular departure times for flights from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.)?
The most popular departure times for flights from George Bush Intercontinental (IAH) to Washington Dulles Intl. (IAD) are in the morning, from 6am to 9am. This accounts for around 29% of total traffic. Many major carriers, including United Airlines and Delta Air Lines, offer flights during this window. Many travelers prefer these early morning flights to arrive at their destination with plenty of time for business or leisure activities.
How long does it take to fly from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.)?
Flying nonstop from IAH to IAD takes around 3 hours 20 minutes, with the route covering approximately 1,190 miles. Flights with a layover typically take 4 hours 40 minutes longer than direct options. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.)?
Select the "Business class" and "First class" filters when looking for IAH to IAD flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.) flight with Expedia?
It's easy to earn miles on a Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Washington from George Bush Intercontinental (IAH)?
When traveling from George Bush Intercontinental (IAH) to Washington, you can fly into Ronald Reagan Washington National (DCA) and Washington Dulles Intl. (IAD). Some flights may connect through major hubs like Portland Intl. (PDX), Seattle - Tacoma Intl. (SEA), Dallas-Fort Worth Intl. (DFW) before reaching Washington. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.) at the last minute?
Typically, booking a last minute flight from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package?
Securing a Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.)?
If you booked your Houston, TX (IAH-George Bush Intercontinental) to Washington, DC (IAD-Washington Dulles Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
George Bush Intercontinental
Destination airport
Washington Dulles Intl.
Airlines serving
Alaska Airlines
Return price
£514
Distance
1903 km
Average flight time
6 hours 14 mins

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