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

According to our current data, Frontier ($155), United Airlines ($177), and Southwest ($197) offers the cheapest pricing from Houston to Washington, D.C. Dulles Intl Airport. Users have found that Frontier is 58% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from Houston 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 $101. Users have also found prices from $106 and $119 on United Airlines and Delta, respectively.

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 to Washington, D.C. Dulles Intl Airport?

Before booking your flight from Houston to Washington, D.C. Dulles Intl Airport check out the most popular airlines for this route: American Airlines, Delta or Frontier.

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

Departing on a Tuesday is a good option for securing a great price. You can expect to save up to 49% when planning your travel around this day of the week.

What is the cheapest month to fly from Houston to Washington, D.C. Dulles Intl Airport?

The best pricing can be found in the month of October. Prices to Washington, D.C. Dulles Intl Airport from Houston average $276. You can even find prices in October for less than $276, as users have found deals to Washington, D.C. Dulles Intl Airport from as low as $92. The month of March appears to be one of the more expensive times to travel to Washington, D.C. Dulles Intl Airport from Houston. Flying in the targeted month can save you up to 21%.

Can I find deals for flights from Houston to Dulles Intl that include hotel bookings?

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

How can I find direct flights from Houston to Dulles Intl?

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

Can I find deals for business class flights from Houston to Dulles Intl?

Yes. Cheapflights offers flight deals from Houston 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.

$101+ Flights from Houston to Washington, D.C. Dulles Intl Airport

Q: How far in advance should I book a flight from Houston to Washington, D.C. Dulles Intl Airport?

To save up to 133% on this flight, we recommend booking at least 55 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Houston to Washington, D.C. Dulles Intl Airport from $231 1-2 weeks out and tickets from $365 for flights departing within the next 72 hours.

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1. Tell us where you want to go

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2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Houston to Washington, D.C. Dulles Intl are usually found in September or January, booked 67 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from Houston to Dulles Intl

Round-trip from	$155 (Frontier)
One-way from	$101 (Mytrip)
Popular in	November
Cheapest in	September
Average price	$350

From Houston to Washington, D.C. Dulles Intl

Search Deals

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

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Highest demand for flights based on searches. 9% potential increase in price ($36 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).

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Average for round-trip flights in June 2025

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Find flight deals from Houston to Dulles Intl

Cheapest flights from Houston to Dulles Intl
Explore the most affordable flight options available from Houston to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 30, 2025.

Wed 9/38:45 amIAH - IAD

1 stop11h 54mFrontier

Sat 9/67:00 amIAD - IAH

1 stop11h 01mFrontier

Deal found 6/28

$155

Mon 8/188:15 pmIAH - IAD

Nonstop3h 00mUnited Airlines

Tue 8/195:55 pmIAD - IAH

Nonstop3h 18mUnited Airlines

Deal found 6/29

$177

Wed 7/238:56 pmIAH - IAD

1 stop14h 48mMultiple Airlines

Sat 7/266:10 amIAD - IAH

1 stop8h 03mMultiple Airlines

Deal found 6/30

$192

Tue 9/238:05 amHOU - IAD

1 stop7h 10mSouthwest

Tue 9/305:45 amIAD - HOU

1 stop9h 15mSouthwest

Deal found 6/28

$197

Tue 8/1210:22 amHOU - IAD

1 stop5h 08mDelta

Tue 8/196:00 amIAD - HOU

1 stop7h 10mDelta

Deal found 6/29

$237

Sun 7/276:05 pmHOU - IAD

1 stop17h 26mSun Country Air

Tue 7/2912:34 pmIAD - HOU

1 stop25h 55mSun Country Air

Deal found 6/30

$285

Thu 9/256:00 amHOU - IAD

1 stop9h 50mAmerican Airlines

Sat 9/2711:47 amIAD - HOU

1 stop5h 08mAmerican Airlines

Deal found 6/29

$287

Thu 8/76:24 pmHOU - IAD

2 stops22h 39mMultiple Airlines

Sun 8/109:05 pmIAD - HOU

2 stops22h 08mMultiple Airlines

Deal found 6/28

$359

Best flights from Houston to Dulles Intl
Discover carefully curated flight deals from Houston to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 30, 2025.

Wed 9/38:45 amIAH - IAD

1 stop11h 54mFrontier

Sat 9/67:00 amIAD - IAH

1 stop11h 01mFrontier

Deal found 6/28

$155

Mon 8/188:15 pmIAH - IAD

Nonstop3h 00mUnited Airlines

Tue 8/195:55 pmIAD - IAH

Nonstop3h 18mUnited Airlines

Deal found 6/29

$177

Wed 7/238:56 pmIAH - IAD

1 stop14h 48mMultiple Airlines

Sat 7/266:10 amIAD - IAH

1 stop8h 03mMultiple Airlines

Deal found 6/30

$192

Tue 9/238:05 amHOU - IAD

1 stop7h 10mSouthwest

Tue 9/305:45 amIAD - HOU

1 stop9h 15mSouthwest

Deal found 6/28

$197

Tue 8/1210:22 amHOU - IAD

1 stop5h 08mDelta

Tue 8/196:00 amIAD - HOU

1 stop7h 10mDelta

Deal found 6/29

$237

Sun 7/276:05 pmHOU - IAD

1 stop17h 26mSun Country Air

Tue 7/2912:34 pmIAD - HOU

1 stop25h 55mSun Country Air

Deal found 6/30

$285

Thu 9/256:00 amHOU - IAD

1 stop9h 50mAmerican Airlines

Sat 9/2711:47 amIAD - HOU

1 stop5h 08mAmerican Airlines

Deal found 6/29

$287

Thu 8/76:24 pmHOU - IAD

2 stops22h 39mMultiple Airlines

Sun 8/109:05 pmIAD - HOU

2 stops22h 08mMultiple Airlines

Deal found 6/28

$359

Last-minute flights from Houston to Dulles Intl
Discover last-minute flight deals from Houston to Dulles Intl. Data last updated June 30, 2025 and is based on user searches.

Tue 7/14:42 pmIAH - IAD

1 stop6h 22mFrontier

Fri 7/44:24 pmIAD - IAH

1 stop7h 36mFrontier

Deal found 6/28

$157

Fri 7/47:03 pmHOU - IAD

2 stops17h 52mMultiple Airlines

Sun 7/1310:00 amIAD - HOU

1 stop8h 18mMultiple Airlines

Deal found 6/30

$567

Mon 7/75:00 amHOU - IAD

1 stop4h 59mAmerican Airlines

Sat 8/211:49 amIAD - HOU

1 stop7h 10mAmerican Airlines

Deal found 6/30

$490

Tue 7/84:42 pmIAH - IAD

1 stop6h 30mFrontier

Sun 8/36:10 amIAD - IAH

1 stop10h 13mFrontier

Deal found 6/29

$161

Thu 7/109:40 amHOU - IAD

1 stop8h 25mSouthwest

Mon 7/215:00 amIAD - HOU

1 stop9h 20mSouthwest

Deal found 6/30

$573

Thu 7/104:16 pmHOU - IAD

1 stop5h 00mDelta

Tue 7/153:37 pmIAD - HOU

1 stop6h 03mDelta

Deal found 6/30

$589

Wed 7/238:56 pmIAH - IAD

1 stop14h 48mMultiple Airlines

Sat 7/266:10 amIAD - IAH

1 stop8h 03mMultiple Airlines

Deal found 6/30

$192

Sat 7/265:15 amHOU - IAD

1 stop6h 55mSouthwest

Wed 7/307:25 amIAD - HOU

2 stops14h 15mSouthwest

Deal found 6/30

$321

Sun 7/276:05 pmHOU - IAD

1 stop17h 26mSun Country Air

Tue 7/2912:34 pmIAD - HOU

1 stop25h 55mSun Country Air

Deal found 6/30

$285

Sun 7/275:00 amHOU - IAD

1 stop4h 59mAmerican Airlines

Sun 8/36:44 pmIAD - HOU

1 stop6h 06mAmerican Airlines

Deal found 6/29

$426

Tue 7/296:00 amHOU - IAD

1 stop7h 42mDelta

Tue 8/53:37 pmIAD - HOU

1 stop6h 03mDelta

Deal found 6/30

$244

One-way flights from Houston to Dulles Intl
Search for one-way flight options from Houston to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated June 30, 2025.

Thu 10/29:10 pmIAH - IAD

1 stop21h 40mFrontier

Deal found 6/30

$101

Mon 9/17:20 amIAH - IAD

Nonstop3h 08mUnited Airlines

Deal found 6/29

$106

Wed 9/312:41 pmIAH - IAD

3 stops21h 45mMultiple Airlines

Deal found 6/28

$110

Mon 8/46:40 pmHOU - IAD

1 stop4h 54mDelta

Deal found 6/29

$119

Tue 8/191:07 pmIAH - IAD

1 stop4h 42mDelta

Deal found 6/30

$119

Tue 9/162:27 pmIAH - IAD

1 stop19h 30mAmerican Airlines

Deal found 6/28

$127

Tue 11/256:37 pmHOU - IAD

1 stop16h 17mSun Country Air

Deal found 6/28

$143

Sun 8/34:25 pmHOU - IAD

1 stop5h 21mAmerican Airlines

Deal found 6/28

$179

Mon 8/111:00 pmHOU - IAD

2 stops8h 50mSouthwest

Deal found 6/29

$214

Thu 7/106:00 pmHOU - IAD

2 stops23h 03mMultiple Airlines

Deal found 6/30

$382

Sat 7/192:29 pmHOU - IAD

2 stops41h 11mQatar Airways

Deal found 6/28

$1,612

Cheapflights Fare Finder

Use the filters below to find and compare flights from Houston 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

Wed 9/3

8:45 am-9:39 pm

1 stop11h 54m

Washington, D.C. Dulles Intl

Sat 9/6

7:00 am-5:01 pm

1 stop11h 01m

$155

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Mon 8/18

8:15 pm-12:15 am

Nonstop3h 00m

Washington, D.C. Dulles Intl

Tue 8/19

5:55 pm-8:13 pm

Nonstop3h 18m

$177

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Wed 7/23

8:56 pm-12:44 pm

1 stop14h 48m

Washington, D.C. Dulles Intl

Sat 7/26

6:10 am-1:13 pm

1 stop8h 03m

$192

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Tue 9/23

8:05 am-4:15 pm

1 stop7h 10m

Washington, D.C. Dulles Intl

Tue 9/30

5:45 am-2:00 pm

1 stop9h 15m

$197

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Tue 8/12

10:22 am-4:30 pm

1 stop5h 08m

Washington, D.C. Dulles Intl

Tue 8/19

6:00 am-12:10 pm

1 stop7h 10m

$237

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Sun 7/27

6:05 pm-12:31 pm

1 stop17h 26m

Washington, D.C. Dulles Intl

Tue 7/29

12:34 pm-1:29 pm

1 stop25h 55m

$285

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Thu 9/25

6:00 am-4:50 pm

1 stop9h 50m

Washington, D.C. Dulles Intl

Sat 9/27

11:47 am-3:55 pm

1 stop5h 08m

$287

HoustonWashington, D.C.

HOU - IAD

HOUIAD

Houston Hobby

Thu 8/7

6:24 pm-6:03 pm

2 stops22h 39m

Washington, D.C. Dulles Intl

Sun 8/10

9:05 pm-6:13 pm

2 stops22h 08m

$359

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Thu 10/2

9:10 pm-7:50 pm

1 stop21h 40m

$101

HoustonWashington, D.C.

IAH - IAD

IAHIAD

Houston George Bush Intcntl

Mon 9/1

7:20 am-11:28 am

Nonstop3h 08m

$106

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 18 results

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

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

Airports

IAH

Check security wait times on the IAH website to save time before your flight.

IAD

Use the Washington Metro Silver Line for a cheap, 40-minute ride to downtown from IAD.

Our travel experts

Evie Carrick

Expert on IAH

Ramsey Qubein

Expert on IAD

Best time to book a flight from Houston to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Houston 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 to Washington, D.C. Dulles Intl Airport

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

To ensure you get the cheapest price possible for a flight from Houston to Washington, D.C. Dulles Intl Airport, you should look to book at least 67 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, August is the cheapest month in which you can book a flight from Houston to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Houston to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $345). 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 HOU to IAD?

It’s optimal to fly from Houston to Washington, D.C. Dulles Intl Airport in the afternoon. By choosing this option you can save up to 9% on the cost of your flight, compared to a flight in the morning.

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

Travelers seeking maximum savings on their Houston to Washington, D.C. Dulles Intl Airport flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Dulles Intl

See what other customers who have flown with Southwest, Delta, and Qatar Airways from Houston to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,278 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Southwest

8.0

Very good

4,278 reviews

Southwest

8.0

Very good

4,278 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Delta

8.0

Very good

7,969 reviews

Southwest

8.0

Very good

4,278 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Qatar Airways

7.4

Good

3,596 reviews

Southwest

8.0

Very good

4,278 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

United Airlines

7.4

Good

8,852 reviews

Southwest

8.0

Very good

4,278 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,278 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Related info for your journey

What are the cheapest airlines flying from Houston to Washington, D.C. Dulles Intl Airport round-trip?
According to our current data, Frontier ($155), United Airlines ($177), and Southwest ($197) offers the cheapest pricing from Houston to Washington, D.C. Dulles Intl Airport. Users have found that Frontier is 58% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from Houston 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 $101. Users have also found prices from $106 and $119 on United Airlines and Delta, respectively.
Can I find deals for flights from Houston to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Houston to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Houston to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Houston to Dulles Intl.
Can I find deals for business class flights from Houston to Dulles Intl?
Yes. Cheapflights offers flight deals from Houston 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 to Washington, D.C. Dulles Intl Airport?
Currently, August is the cheapest month in which you can book a flight from Houston to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Houston to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $345). 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 Houston to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$54	Average$235	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$161	Average$282	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$234	Average$422	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$236	Average$316	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$244	Average$382	FlexibilityNo cancel fee	On-time69%

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$101+ Cheap flights from Houston 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 10/2. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Houston to Dulles Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Houston to Washington, D.C. Dulles Intl are usually found in September or January, booked 67 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from Houston to Dulles Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Houston to Dulles Intl

Cheapest flights from Houston to Dulles IntlExplore the most affordable flight options available from Houston to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 30, 2025.

Explore the most affordable flight options available from Houston to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 30, 2025.

Cheapflights Fare Finder

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

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

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

Airports

IAH

IAD

Our travel experts

Best time to book a flight from Houston to Dulles Intl

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

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a round-trip flight from Houston to Dulles Intl. Price data was last updated on June 27, 2025.

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

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

Find hourly flight availability from Houston 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 June 30, 2025.

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

Use this chart to determine the cheapest time to fly round-trip from Houston to Dulles Intl. Price data was last updated on June 30, 2024.

Reviews of airlines servicing Dulles Intl

See what other customers who have flown with Southwest, Delta, and Qatar Airways from Houston to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Houston 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 to Washington, D.C. Dulles Intl Airport round-trip?

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

Can I find deals for flights from Houston to Dulles Intl that include hotel bookings?

How can I find direct flights from Houston to Dulles Intl?

Can I find deals for business class flights from Houston to Dulles Intl?

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

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Alternative routes for Houston to Dulles Intl

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Top 5 airlines flying from Houston to Dulles Intl

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Cheapest flights from Houston to Dulles Intl
Explore the most affordable flight options available from Houston to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 30, 2025.