What is the cheapest airline to fly from Harlingen, Texas to Washington, D.C. Dulles Intl Airport round-trip?

Cheapflights users have booked flights from Harlingen, Texas to Washington, D.C. Dulles Intl Airport round-trip from $306.

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

Currently, July is the cheapest month in which you can book a flight from Harlingen, Texas to Washington, D.C. Dulles Intl Airport (average of $302). Flying from Harlingen, Texas 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 day to fly from Harlingen, Texas to Washington, D.C. Dulles Intl Airport?

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

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

Flying to your destination on a Tuesday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to Washington, D.C. Dulles Intl Airport. Check prices with Cheapflights to find a great deal for your trip.

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

The best pricing can be found in the month of September. Prices to Washington, D.C. Dulles Intl Airport from Harlingen, Texas average $345. You can even find prices in September for less than $345, as users have found deals to Washington, D.C. Dulles Intl Airport from as low as $226. The month of January appears to be one of the more expensive times to travel to Washington, D.C. Dulles Intl Airport from Harlingen, Texas. Flying in the targeted month can save you up to 40%.

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

Unlike in the morning, when flights are generally more expensive, you can save up to 2% on flights from Harlingen, Texas to Washington, D.C. Dulles Intl Airport by exploring options for tickets at noon.

What airport do you fly from for flights from Harlingen to Washington, D.C. Dulles Intl?

Harlingen Valley Intl (HRL), located 3.7 mi from the city center, is the airport you fly out of when you book flights from Harlingen to Washington, D.C. Dulles Intl. 1 airline have flights from Valley Intl to Washington, D.C. Dulles Intl on a regular basis. Booking flights from Harlingen Valley Intl to Washington, D.C. Dulles Intl should not be difficult; the airport handles an average of 0 outbound flights to Washington, D.C. Dulles Intl per day.

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

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

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

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

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

Yes. Cheapflights offers flight deals from Harlingen 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.

$105+ Cheap Flights from Harlingen, TX to Washington, D.C. Dulles Intl Airport

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Cheap flight deals from Harlingen to Dulles Intl

Round-trip from	$362 (United Airlines)
One-way from	$105 (American Airlines)
Popular in	January
Cheapest in	September
Average price	$383

From Harlingen Valley Intl to Washington, D.C. Dulles Intl

Search Deals

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

Search Deals

Highest demand for flights based on searches. 7% potential increase in price ($28 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).

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Average for round-trip flights in August 2025

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Find flight deals from Harlingen to Dulles Intl

Cheapest flights from Harlingen to Dulles Intl
Explore the most affordable flight options available from Harlingen to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

Mon 9/87:00 amHRL - IAD

1 stop7h 03mUnited Airlines

Fri 9/126:00 amIAD - HRL

1 stop8h 30mUnited Airlines

Deal found 8/14

$362

Mon 11/175:00 pmHRL - IAD

1 stop5h 44mUnited Airlines

Fri 11/216:00 amIAD - HRL

1 stop5h 59mUnited Airlines

Deal found 8/14

$402

Fri 8/292:47 pmHRL - IAD

1 stop7h 03mAmerican Airlines

Tue 9/26:27 amIAD - HRL

1 stop8h 48mAmerican Airlines

Deal found 8/14

$458

Fri 8/295:20 pmHRL - IAD

2 stops13h 03mUnited Airlines

Tue 9/211:03 amIAD - HRL

1 stop5h 59mUnited Airlines

Deal found 8/14

$522

Sun 9/76:19 pmHRL - IAD

1 stop15h 38mAmerican Airlines

Sun 9/146:25 amIAD - HRL

1 stop17h 27mAmerican Airlines

Deal found 8/14

$553

Fri 8/295:20 pmHRL - IAD

1 stop5h 35mUnited Airlines

Mon 9/112:50 pmIAD - HRL

1 stop7h 43mUnited Airlines

Deal found 8/12

$587

Best flights from Harlingen to Dulles Intl
Discover carefully curated flight deals from Harlingen to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 14, 2025.

Mon 9/87:00 amHRL - IAD

1 stop7h 03mUnited Airlines

Fri 9/126:00 amIAD - HRL

1 stop8h 30mUnited Airlines

Deal found 8/14

$362

Fri 8/292:47 pmHRL - IAD

1 stop7h 03mAmerican Airlines

Tue 9/26:27 amIAD - HRL

1 stop8h 48mAmerican Airlines

Deal found 8/14

$458

Mon 11/175:00 pmHRL - IAD

1 stop5h 44mUnited Airlines

Fri 11/216:00 amIAD - HRL

1 stop5h 59mUnited Airlines

Deal found 8/14

$402

Sun 9/76:19 pmHRL - IAD

1 stop15h 38mAmerican Airlines

Sun 9/146:25 amIAD - HRL

1 stop17h 27mAmerican Airlines

Deal found 8/14

$553

Fri 8/295:20 pmHRL - IAD

2 stops13h 03mUnited Airlines

Tue 9/211:03 amIAD - HRL

1 stop5h 59mUnited Airlines

Deal found 8/14

$522

Fri 8/295:20 pmHRL - IAD

1 stop5h 35mUnited Airlines

Mon 9/112:50 pmIAD - HRL

1 stop7h 43mUnited Airlines

Deal found 8/12

$587

Last-minute flights from Harlingen to Dulles Intl
Discover last-minute flight deals from Harlingen to Dulles Intl. Data last updated August 14, 2025 and is based on user searches.

Fri 8/292:47 pmHRL - IAD

1 stop7h 03mAmerican Airlines

Tue 9/26:27 amIAD - HRL

1 stop8h 48mAmerican Airlines

Deal found 8/14

$458

Fri 8/295:20 pmHRL - IAD

2 stops13h 03mUnited Airlines

Tue 9/211:03 amIAD - HRL

1 stop5h 59mUnited Airlines

Deal found 8/14

$522

Fri 8/295:20 pmHRL - IAD

1 stop5h 35mUnited Airlines

Mon 9/112:50 pmIAD - HRL

1 stop7h 43mUnited Airlines

Deal found 8/12

$587

Sun 9/76:19 pmHRL - IAD

1 stop15h 38mAmerican Airlines

Sun 9/146:25 amIAD - HRL

1 stop17h 27mAmerican Airlines

Deal found 8/14

$553

Mon 9/87:00 amHRL - IAD

1 stop7h 03mUnited Airlines

Fri 9/126:00 amIAD - HRL

1 stop8h 30mUnited Airlines

Deal found 8/14

$362

One-way flights from Harlingen to Dulles Intl
Search for one-way flight options from Harlingen to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated August 14, 2025.

Wed 9/32:51 pmHRL - IAD

1 stop6h 57mAmerican Airlines

Deal found 8/12

$105

Wed 9/35:00 amHRL - IAD

3 stops10h 23mUnited Airlines

Deal found 8/12

$492

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

HarlingenWashington, D.C.

HRL - IAD

HRLIAD

Harlingen Valley Intl

Mon 9/8

7:00 am-3:03 pm

1 stop7h 03m

Washington, D.C. Dulles Intl

Fri 9/12

6:00 am-1:30 pm

1 stop8h 30m

$362

HarlingenWashington, D.C.

HRL - IAD

HRLIAD

Harlingen Valley Intl

Mon 11/17

5:00 pm-11:44 pm

1 stop5h 44m

Washington, D.C. Dulles Intl

Fri 11/21

6:00 am-10:59 am

1 stop5h 59m

$402

HarlingenWashington, D.C.

HRL - IAD

HRLIAD

Harlingen Valley Intl

Fri 8/29

2:47 pm-10:50 pm

1 stop7h 03m

Washington, D.C. Dulles Intl

Tue 9/2

6:27 am-2:15 pm

1 stop8h 48m

$458

HarlingenWashington, D.C.

HRL - IAD

HRLIAD

Harlingen Valley Intl

Fri 8/29

5:20 pm-7:23 am

2 stops13h 03m

Washington, D.C. Dulles Intl

Tue 9/2

11:03 am-4:02 pm

1 stop5h 59m

$522

HarlingenWashington, D.C.

HRL - IAD

HRLIAD

Harlingen Valley Intl

Sun 9/7

6:19 pm-10:57 am

1 stop15h 38m

Washington, D.C. Dulles Intl

Sun 9/14

6:25 am-10:52 pm

1 stop17h 27m

$553

HarlingenWashington, D.C.

HRL - IAD

HRLIAD

Harlingen Valley Intl

Fri 8/29

5:20 pm-11:55 pm

1 stop5h 35m

Washington, D.C. Dulles Intl

Mon 9/1

12:50 pm-7:33 pm

1 stop7h 43m

$587

HarlingenWashington, D.C.

HRL - IAD

HRLIAD

Harlingen Valley Intl

Wed 9/3

2:51 pm-10:48 pm

1 stop6h 57m

$105

HarlingenWashington, D.C.

HRL - IAD

HRLIAD

Harlingen Valley Intl

Wed 9/3

5:00 am-4:23 pm

3 stops10h 23m

$492

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Best time to book a flight from Harlingen to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Harlingen 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.

Reviews of airlines servicing Dulles Intl

Peruse reviews from past customers who have flown with United Airlines from Harlingen 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.

United Airlines

7.4

Good

8,916 reviews

Reviews

1 / 20

8.0

Excellent

Mignon,Nov 2024

IAH - LGA

Good boarding process. (Nice to be able to buy Group 2 boarding option.) Plane was clean. Tried to avoid full flight by flying on Saturday, but plane was full anyway. Gate area in Houston should have charging options. Should be a lounge for people with American Express Platinum Card in Houston Airport.

United Airlines

7.4

Good

8,916 reviews

United Airlines

7.4

Good

8,916 reviews

Reviews

1 / 20

8.0

Excellent

Mignon,Nov 2024

IAH - LGA

Related info for your journey

What airport do you fly from for flights from Harlingen to Washington, D.C. Dulles Intl?
Harlingen Valley Intl (HRL), located 3.7 mi from the city center, is the airport you fly out of when you book flights from Harlingen to Washington, D.C. Dulles Intl. 1 airline have flights from Valley Intl to Washington, D.C. Dulles Intl on a regular basis. Booking flights from Harlingen Valley Intl to Washington, D.C. Dulles Intl should not be difficult; the airport handles an average of 0 outbound flights to Washington, D.C. Dulles Intl per day.
What is the cheapest airline to fly from Harlingen, Texas to Washington, D.C. Dulles Intl Airport round-trip?
Cheapflights users have booked flights from Harlingen, Texas to Washington, D.C. Dulles Intl Airport round-trip from $306.
Can I find deals for flights from Harlingen to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Harlingen to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Harlingen to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Harlingen to Dulles Intl.
Can I find deals for business class flights from Harlingen to Dulles Intl?
Yes. Cheapflights offers flight deals from Harlingen 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 Harlingen, Texas to Washington, D.C. Dulles Intl Airport?
Currently, July is the cheapest month in which you can book a flight from Harlingen, Texas to Washington, D.C. Dulles Intl Airport (average of $302). Flying from Harlingen, Texas 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 airline flying from Harlingen to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$306	Average$491	FlexibilityNo cancel fee	On-time69%

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$105+ Cheap flights from Harlingen, TX (HRL) 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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Harlingen to Dulles Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Harlingen to Dulles Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Harlingen to Dulles Intl

Cheapest flights from Harlingen to Dulles IntlExplore the most affordable flight options available from Harlingen to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

Explore the most affordable flight options available from Harlingen to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Harlingen to Dulles Intl

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

Reviews of airlines servicing Dulles Intl

Peruse reviews from past customers who have flown with United Airlines from Harlingen 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.

Related info for your journey

Find useful and relevant information for your journey from Harlingen 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 airport do you fly from for flights from Harlingen to Washington, D.C. Dulles Intl?

What is the cheapest airline to fly from Harlingen, Texas to Washington, D.C. Dulles Intl Airport round-trip?

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

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

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

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

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Harlingen to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Harlingen to Dulles Intl

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Cheapest flights from Harlingen to Dulles Intl
Explore the most affordable flight options available from Harlingen to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.