In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

What are the most popular airlines that fly from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport?

The most popular airlines flying from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport are American Airlines, Delta and Frontier. Something to consider prior to booking your flight.

What is the cheapest day to fly round-trip from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport?

Travelers have found that booking a Thursday departure is the best way to save up to 68% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.

Can I find deals for flights from George Bush Intcntl to Dulles Intl that include hotel bookings?

Yes. In addition to deals on George Bush Intcntl to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from George Bush Intcntl to Dulles Intl?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from George Bush Intcntl to Dulles Intl.

Can I find deals for business class flights from George Bush Intcntl to Dulles Intl?

Yes. Cheapflights offers flight deals from George Bush Intcntl to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$103+ Flights from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport

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Cheapflights Tip: The best prices from Houston George Bush Intcntl to Washington, D.C. Dulles Intl are usually found in September or August, booked 44 days in advance, depart on a Friday or Thursday and return on a Friday

Cheap flight deals from George Bush Intcntl to Dulles Intl

Round-trip from	$162 (Trip.com)
One-way from	$103 (Cheapflightsfares)
Popular in	July
Cheapest in	September
Average price	$432
Good round-trip deal	$584 or less
Good one-way deal	$174 or less

From Houston George Bush Intcntl to Washington, D.C. Dulles Intl

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One-way flight from Houston George Bush Intcntl to Washington, D.C. Dulles Intl

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Highest demand for flights based on searches. 1% potential increase in price ($5 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).

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Price to beat on a round-trip flight from Houston George Bush Intcntl to Washington, D.C. Dulles Intl.

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Find flight deals from George Bush Intcntl to Dulles Intl

Cheapest flights from George Bush Intcntl to Dulles Intl
Explore the most affordable flight options available from George Bush Intcntl to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.

Tue 8/127:05 amIAH - IAD

1 stop16h 14mMultiple Airlines

Sat 8/164:07 pmIAD - IAH

1 stop7h 13mMultiple Airlines

Deal found 7/27

$162

Mon 8/116:00 amIAH - IAD

1 stop6h 49mFrontier

Thu 8/142:44 pmIAD - IAH

1 stop9h 12mFrontier

Deal found 7/26

$171

Sat 10/42:52 pmIAH - IAD

1 stop16h 54mAmerican Airlines

Sun 10/511:47 amIAD - IAH

1 stop7h 02mAmerican Airlines

Deal found 7/27

$215

Tue 9/912:22 pmIAH - IAD

Nonstop3h 08mUnited Airlines

Sat 9/1311:03 amIAD - IAH

Nonstop3h 14mUnited Airlines

Deal found 7/28

$277

Best flights from George Bush Intcntl to Dulles Intl
Discover carefully curated flight deals from George Bush Intcntl to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 28, 2025.

Tue 8/127:05 amIAH - IAD

1 stop16h 14mMultiple Airlines

Sat 8/164:07 pmIAD - IAH

1 stop7h 13mMultiple Airlines

Deal found 7/27

$162

Mon 8/116:00 amIAH - IAD

1 stop6h 49mFrontier

Thu 8/142:44 pmIAD - IAH

1 stop9h 12mFrontier

Deal found 7/26

$171

Sat 10/42:52 pmIAH - IAD

1 stop16h 54mAmerican Airlines

Sun 10/511:47 amIAD - IAH

1 stop7h 02mAmerican Airlines

Deal found 7/27

$215

Tue 9/912:22 pmIAH - IAD

Nonstop3h 08mUnited Airlines

Sat 9/1311:03 amIAD - IAH

Nonstop3h 14mUnited Airlines

Deal found 7/28

$277

Last-minute flights from George Bush Intcntl to Dulles Intl
Discover last-minute flight deals from George Bush Intcntl to Dulles Intl. Data last updated July 28, 2025 and is based on user searches.

Sat 8/24:50 pmIAH - IAD

Nonstop3h 12mUnited Airlines

Sat 8/1612:50 pmIAD - IAH

Nonstop3h 14mUnited Airlines

Deal found 7/26

$529

Sat 8/26:00 amIAH - IAD

1 stop5h 49mAmerican Airlines

Sat 8/161:18 pmIAD - IAH

2 stops7h 48mAmerican Airlines

Deal found 7/26

$554

Tue 8/54:40 pmIAH - IAD

1 stop6h 39mFrontier

Wed 8/66:10 amIAD - IAH

1 stop8h 15mFrontier

Deal found 7/28

$196

Thu 8/710:03 amIAH - IAD

2 stops13h 16mMultiple Airlines

Tue 8/126:10 amIAD - IAH

1 stop17h 27mMultiple Airlines

Deal found 7/26

$180

Mon 8/116:00 amIAH - IAD

1 stop6h 49mFrontier

Thu 8/142:44 pmIAD - IAH

1 stop9h 12mFrontier

Deal found 7/26

$171

Tue 8/127:05 amIAH - IAD

1 stop16h 14mMultiple Airlines

Sat 8/164:07 pmIAD - IAH

1 stop7h 13mMultiple Airlines

Deal found 7/27

$162

Fri 8/226:10 pmIAH - IAD

Nonstop3h 05mUnited Airlines

Sun 8/246:00 amIAD - IAH

Nonstop3h 14mUnited Airlines

Deal found 7/28

$277

One-way flights from George Bush Intcntl to Dulles Intl
Search for one-way flight options from George Bush Intcntl to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated July 28, 2025.

Sun 9/76:05 amIAH - IAD

1 stop5h 50mFrontier

Deal found 7/27

$103

Tue 10/2812:46 pmIAH - IAD

3 stops21h 37mMultiple Airlines

Deal found 7/27

$110

Wed 8/277:20 amIAH - IAD

Nonstop3h 08mUnited Airlines

Deal found 7/28

$139

Tue 10/77:05 amIAH - IAD

1 stop6h 33mDelta

Deal found 7/28

$149

Cheapflights Fare Finder

Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Tue 8/12

7:05 am-12:19 am

1 stop16h 14m

Washington, D.C. Dulles Intl

Sat 8/16

4:07 pm-10:20 pm

1 stop7h 13m

$162

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Mon 8/11

6:00 am-1:49 pm

1 stop6h 49m

Washington, D.C. Dulles Intl

Thu 8/14

2:44 pm-10:56 pm

1 stop9h 12m

$171

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Sat 10/4

2:52 pm-8:46 am

1 stop16h 54m

Washington, D.C. Dulles Intl

Sun 10/5

11:47 am-5:49 pm

1 stop7h 02m

$215

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Tue 9/9

12:22 pm-4:30 pm

Nonstop3h 08m

Washington, D.C. Dulles Intl

Sat 9/13

11:03 am-1:17 pm

Nonstop3h 14m

$277

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Sun 9/7

6:05 am-12:55 pm

1 stop5h 50m

$103

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Tue 10/28

12:46 pm-11:23 am

3 stops21h 37m

$110

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Wed 8/27

7:20 am-11:28 am

Nonstop3h 08m

$139

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Tue 10/7

7:05 am-2:38 pm

1 stop6h 33m

$149

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

The best insider tips for Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport flights

Cheapflights partnered with top experts to bring you the best recommendations for your Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport trip

Airports

IAH

Check the IAH website for security wait times to ensure a smooth departure. Both standard and TSA PreCheck lines are available.

IAD

Use the Washington Metro Silver Line for a cost-effective trip to downtown D.C. from IAD, taking less than 40 minutes.

Our travel experts

Evie Carrick

Expert on IAH

Ramsey Qubein

Expert on IAD

Best time to book a flight from George Bush Intcntl to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from George Bush Intcntl with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport

How far ahead should I book a flight from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport?

The price you pay for your flight from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 44 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport?

Currently, August is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IAH to IAD?

It’s optimal to fly from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport in the evening. By choosing this option you can save up to 33% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport?

Travelers seeking maximum savings on their Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport flight should consider departing on Thursday evenings when fares are most often at their lowest. Wednesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport

The most flights from IAH to IAD are scheduled on a Friday (18 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (10 on average).

Reviews of airlines servicing Dulles Intl

Peruse reviews from past customers who have flown with Delta, United Airlines, and American Airlines from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,971 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,971 reviews

Delta

8.0

Very good

7,971 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,893 reviews

Delta

8.0

Very good

7,971 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,971 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Frontier

5.9

Fair

3,238 reviews

Delta

8.0

Very good

7,971 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport round-trip?
Our cheapest airline available from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport is Frontier. Our recent data shows that you can find tickets from as low as $171 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $215 and $277 round-trip. Frontier is priced at 54% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport one-way?
For one-way options, check prices for Frontier. According to our data, you can fly for as low as $103. Users have also found prices from $139 and $149 on United Airlines and Delta, respectively.
What are the most reliable airlines from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport?
Before booking your flight to Washington, D.C. Dulles Intl Airport from Houston George Bush Intcntl Airport, check out the most reliable airlines to get you to your destination on time: Air China (94%), United Airlines (80%), Avianca( 75%).
What are the cheapest flights from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport?
Looking at all options, your cheapest flight can be booked for $134. While the most popular route (Houston George Bush Intcntl - Washington, D.C. Dulles Intl) can be booked for $198 on average our data indicates $2,145 when flying from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport.
Can I find deals for flights from George Bush Intcntl to Dulles Intl that include hotel bookings?
Yes. In addition to deals on George Bush Intcntl to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from George Bush Intcntl to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from George Bush Intcntl to Dulles Intl.
Can I find deals for business class flights from George Bush Intcntl to Dulles Intl?
Yes. Cheapflights offers flight deals from George Bush Intcntl to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport?
Currently, August is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top 5 airlines flying from George Bush Intcntl to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$106	Average$205	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$190	Average$328	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$236	Average$313	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$236	Average$343	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$249	Average$384	FlexibilityNo cancel fee	On-time69%

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$103+ Cheap flights from George Bush Intcntl (IAH) to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/7. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from George Bush Intcntl to Dulles Intl with Cheapflights

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3. Compare prices and book

Cheapflights Tip: The best prices from Houston George Bush Intcntl to Washington, D.C. Dulles Intl are usually found in September or August, booked 44 days in advance, depart on a Friday or Thursday and return on a Friday

Cheap flight deals from George Bush Intcntl to Dulles Intl

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Cheapest flights from George Bush Intcntl to Dulles IntlExplore the most affordable flight options available from George Bush Intcntl to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.

Explore the most affordable flight options available from George Bush Intcntl to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport that are best for you.

The best insider tips for Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport flights

Cheapflights partnered with top experts to bring you the best recommendations for your Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport trip

Airports

IAH

IAD

Our travel experts

Best time to book a flight from George Bush Intcntl to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from George Bush Intcntl with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport

How far ahead should I book a flight from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from George Bush Intcntl to Dulles Intl. Price data was last updated on July 25, 2025.

What is the cheapest month to book a flight from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport?

What is the cheapest time of day to fly from IAH to IAD?

Find hourly flight availability from George Bush Intcntl to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 28, 2025.

What is the cheapest day to fly from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from George Bush Intcntl to Dulles Intl. Price data was last updated on July 27, 2025.

Weekly flight availability from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport

Reviews of airlines servicing Dulles Intl

Related info for your journey

Find useful and relevant information for your journey from George Bush Intcntl to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport round-trip?

What are the cheapest airlines to fly from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport one-way?

What are the most reliable airlines from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport?

What are the cheapest flights from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport?

Can I find deals for flights from George Bush Intcntl to Dulles Intl that include hotel bookings?

How can I find direct flights from George Bush Intcntl to Dulles Intl?

Can I find deals for business class flights from George Bush Intcntl to Dulles Intl?

What is the cheapest month to book a flight from Houston George Bush Intcntl Airport to Washington, D.C. Dulles Intl Airport?

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Top 5 airlines flying from George Bush Intcntl to Dulles Intl

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Cheapest flights from George Bush Intcntl to Dulles Intl
Explore the most affordable flight options available from George Bush Intcntl to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.