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

Our cheapest airline available from Washington, D.C. Dulles Intl Airport to Harlingen is American Airlines. Our recent data shows that you can find tickets from as low as $229 on this airline. An additional option worth looking into is United Airlines, starting at $340.

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

Currently, April is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Harlingen (average of $267). Flying from Washington, D.C. Dulles Intl Airport to Harlingen in June is currently the most expensive (average of $381). 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 Washington, D.C. Dulles Intl Airport to Harlingen?

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

In terms of precipitation, rainfall in Harlingen ranges from 1.1 - 5.2 inches per month. September is typically the wettest month, when rainfall can reach 5.2 in. January is typically the driest time to visit Harlingen when rainfall is around 1.1 in.

If weather is an important factor for your trip to Harlingen, 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 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 60.8 F).

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

It’s generally more expensive to depart on a Wednesday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

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

Our data shows that February tends to be the cheapest month to fly to Harlingen from Washington, D.C. Dulles Intl Airport. Users have commonly found prices around $404 for the month, but tickets can be as low as $288. Due to multiple factors, prepare for potentially higher prices in April.

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

Located just 3.7 mi from the city center, Harlingen Valley Intl is the airport most travelers will use when flying to Harlingen from Washington, D.C. Dulles Intl. Booking flights from Washington, D.C. Dulles Intl to Valley Intl (HRL) should be relatively easy as there are 0 daily inbound flights from Washington, D.C. Dulles Intl from 1 airline.

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

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

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

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

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

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

$229+ Flights from Washington, D.C. Dulles Intl Airport to Harlingen

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Cheap flight deals from Dulles Intl to Harlingen

Round-trip from	$229 (American Airlines)
Popular in	April
Cheapest in	February

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

Search Deals

Highest demand for flights based on searches. 5% potential increase in price ($22 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).

Search Deals

Find flight deals from Dulles Intl to Harlingen

Cheapest flights from Dulles Intl to Harlingen
Explore the most affordable flight options available from Dulles Intl to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 18, 2025.

Tue 9/166:25 amIAD - HRL

1 stop8h 54mAmerican Airlines

Wed 9/242:51 pmHRL - IAD

1 stop6h 57mAmerican Airlines

Deal found 7/16

$229

Sun 9/1411:03 amIAD - HRL

1 stop5h 59mUnited Airlines

Tue 9/167:00 amHRL - IAD

1 stop7h 03mUnited Airlines

Deal found 7/17

$340

Best flights from Dulles Intl to Harlingen
Discover carefully curated flight deals from Dulles Intl to Harlingen that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 18, 2025.

Tue 9/166:25 amIAD - HRL

1 stop8h 54mAmerican Airlines

Wed 9/242:51 pmHRL - IAD

1 stop6h 57mAmerican Airlines

Deal found 7/16

$229

Wed 9/38:35 amIAD - HRL

1 stop5h 55mUnited Airlines

Sun 9/75:00 amHRL - IAD

1 stop5h 28mUnited Airlines

Deal found 7/14

$340

Last-minute flights from Dulles Intl to Harlingen
Discover last-minute flight deals from Dulles Intl to Harlingen. Data last updated July 18, 2025 and is based on user searches.

Thu 7/2411:49 amIAD - HRL

1 stop8h 37mAmerican Airlines

Tue 7/2910:07 amHRL - IAD

2 stops12h 51mAmerican Airlines

Deal found 7/17

$604

Thu 7/246:10 amIAD - HRL

1 stop8h 10mUnited Airlines

Tue 7/291:59 pmHRL - IAD

1 stop7h 19mUnited Airlines

Deal found 7/17

$663

Fri 8/16:10 amIAD - HRL

1 stop8h 10mUnited Airlines

Tue 8/55:20 pmHRL - IAD

1 stop5h 38mUnited Airlines

Deal found 7/17

$568

One-way flights from Dulles Intl to Harlingen
Search for one-way flight options from Dulles Intl to Harlingen. Find affordable one-way fares based on user searches. Data last updated July 18, 2025.

Thu 7/2411:49 amIAD - HRL

1 stop8h 37mAmerican Airlines

Deal found 7/17

$365

Thu 7/248:35 amIAD - HRL

3 stops14h 15mUnited Airlines

Deal found 7/17

$1,796

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Harlingen

IAD - HRL

IADHRL

Washington, D.C. Dulles Intl

Tue 9/16

6:25 am-2:19 pm

1 stop8h 54m

Harlingen Valley Intl

Wed 9/24

2:51 pm-10:48 pm

1 stop6h 57m

$229

Washington, D.C.Harlingen

IAD - HRL

IADHRL

Washington, D.C. Dulles Intl

Sun 9/14

11:03 am-4:02 pm

1 stop5h 59m

Harlingen Valley Intl

Tue 9/16

7:00 am-3:03 pm

1 stop7h 03m

$340

Washington, D.C.Harlingen

IAD - HRL

IADHRL

Washington, D.C. Dulles Intl

Tue 12/23

10:06 pm-5:43 pm

1 stop20h 37m

$355

Washington, D.C.Harlingen

IAD - HRL

IADHRL

Washington, D.C. Dulles Intl

Thu 7/24

11:49 am-7:26 pm

1 stop8h 37m

$365

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/16

Best time to book a flight from Dulles Intl to Harlingen

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

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

When flying from Washington, D.C. Dulles Intl Airport to Harlingen, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Harlingen

Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Harlingen, such as United Airlines and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,864 reviews

Reviews

1 / 20

8.0

Excellent

FERNANDO,Sep 2024

YYC - IAH

Everything was good, maybe can give better foof flys more than 4 hours

United Airlines

7.4

Good

8,864 reviews

United Airlines

7.4

Good

8,864 reviews

Reviews

1 / 20

8.0

Excellent

FERNANDO,Sep 2024

YYC - IAH

Everything was good, maybe can give better foof flys more than 4 hours

American Airlines

7.2

Good

10,000 reviews

United Airlines

7.4

Good

8,864 reviews

Reviews

1 / 20

8.0

Excellent

FERNANDO,Sep 2024

YYC - IAH

Everything was good, maybe can give better foof flys more than 4 hours

Related info for your journey

What airport do you fly into for flights to Harlingen from Washington, D.C. Dulles Intl?
Located just 3.7 mi from the city center, Harlingen Valley Intl is the airport most travelers will use when flying to Harlingen from Washington, D.C. Dulles Intl. Booking flights from Washington, D.C. Dulles Intl to Valley Intl (HRL) should be relatively easy as there are 0 daily inbound flights from Washington, D.C. Dulles Intl from 1 airline.
What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Harlingen round-trip?
Our cheapest airline available from Washington, D.C. Dulles Intl Airport to Harlingen is American Airlines. Our recent data shows that you can find tickets from as low as $229 on this airline. An additional option worth looking into is United Airlines, starting at $340.
Can I find deals for flights from Dulles Intl to Harlingen that include hotel bookings?
Yes. In addition to deals on Dulles Intl to Harlingen flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Dulles Intl to Harlingen?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Harlingen.
Can I find deals for business class flights from Dulles Intl to Harlingen?
Yes. Cheapflights offers flight deals from Dulles Intl to Harlingen 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 Washington, D.C. Dulles Intl Airport to Harlingen?
Currently, April is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Harlingen (average of $267). Flying from Washington, D.C. Dulles Intl Airport to Harlingen in June is currently the most expensive (average of $381). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Dulles Intl to Harlingen

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$258	Average$468	FlexibilityNo cancel fee	On-time69%

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$229+ Cheap flights from Dulles Intl (IAD) to Harlingen (HRL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/16. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Dulles Intl to Harlingen with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Dulles Intl to Harlingen

Round-trip from

Popular in

Cheapest in

Find flight deals from Dulles Intl to Harlingen

Cheapest flights from Dulles Intl to HarlingenExplore the most affordable flight options available from Dulles Intl to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 18, 2025.

Explore the most affordable flight options available from Dulles Intl to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 18, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Dulles Intl to Harlingen

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

Cheapflights Insights

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

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

Find hourly flight availability from Dulles Intl to Harlingen. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 18, 2025.

Reviews of airlines servicing Harlingen

Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Harlingen, such as United Airlines and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

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

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

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

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

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 Dulles Intl to Harlingen

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

Top airline flying from Dulles Intl to Harlingen

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Cheapest flights from Dulles Intl to Harlingen
Explore the most affordable flight options available from Dulles Intl to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 18, 2025.