How long is the flight from Washington, D.C. to Harlingen?

For as low as $339, American Airlines can have you in Harlingen from Washington, D.C. in 5h 53m. The distance from Washington, D.C. to Harlingen is about 1462 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

According to our current data, United Airlines ($250), offers the cheapest pricing from Washington, D.C. to Harlingen.

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 are the most popular routes from Washington, D.C. to Harlingen?

While some choose either Washington, D.C. Dulles Intl - Harlingen Valley Intl or Washington, D.C. Reagan-National - Harlingen Valley Intl, Baltimore/Washington - Harlingen Valley Intl is the most popular route from Washington, D.C. to Harlingen.

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. to Harlingen as you normally would.

Most accurate provider : When it comes to deals on Washington, D.C.-Harlingen flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C.-Harlingen flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Harlingen flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Washington, D.C.-Harlingen flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C.-Harlingen flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Harlingen Valley Intl (HRL), located 3.7 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. to Harlingen. 2 airlines have flights to Valley Intl from Washington, D.C. on a regular basis. Booking flights from Washington, D.C. to Harlingen Valley Intl should not be difficult; the airport handles an average of 0 inbound flights from Washington, D.C. per day.

Can I find deals for flights from Washington, D.C. to Harlingen that include hotel bookings?

Yes. In addition to deals on Washington, D.C. to Harlingen flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Washington, D.C. to Harlingen?

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

Can I find deals for business class flights from Washington, D.C. to Harlingen?

Yes. Cheapflights offers flight deals from Washington, D.C. 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.

$165+ Cheap Flights from Washington, D.C. to Harlingen

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Cheap flight deals from Washington, D.C. to Harlingen

Cheapest

Best

Last-minute

One-way

Cheapest flights from Washington, D.C. to Harlingen
Explore the most affordable flight options available from Washington, D.C. to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2026.

Sat 9/125:00 am -

1 stop5h 58m

Sat 9/195:28 pm -

1 stop5h 31m

Deal found 8/19

$339

Tue 10/68:30 am -

1 stop5h 53m

Thu 10/85:18 pm -

1 stop6h 12m

Deal found 8/16

$339

Tue 10/67:23 am -

1 stop7h 00m

Tue 10/202:13 pm -

2 stops8h 03m

Deal found 8/20

$344

Sat 9/59:40 am -

1 stop7h 10m

Wed 9/912:35 pm -

1 stop6h 25m

Deal found 8/21

$351

Tue 10/64:44 pm -

1 stop6h 08m

Thu 10/85:18 pm -

1 stop5h 41m

Deal found 8/18

$355

Tue 10/67:30 am -

1 stop6h 53m

Thu 10/82:13 pm -

1 stop8h 10m

Deal found 8/18

$355

Sat 9/56:00 am -

1 stop8h 24m

Wed 9/95:18 pm -

1 stop5h 41m

Deal found 8/21

$359

Thu 9/2410:10 am -

1 stop8h 05m

Mon 9/2811:55 am -

1 stop6h 40m

Deal found 8/19

$359

Tue 9/82:50 pm -

2 stops8h 00m

Sat 9/1212:35 pm -

1 stop6h 50m

Deal found 8/17

$360

Tue 10/63:02 pm -

1 stop7h 50m

Sun 10/185:18 pm -

1 stop6h 12m

Deal found 8/20

$361

Tue 10/67:23 am -

1 stop7h 00m

Thu 10/82:13 pm -

2 stops8h 03m

Deal found 8/20

$367

Thu 10/227:25 pm -

2 stops16h 55m

Sun 10/256:25 pm -

1 stop5h 10m

Deal found 8/18

$370

Best flights from Washington, D.C. to Harlingen
Discover carefully curated flight deals from Washington, D.C. to Harlingen that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 21, 2026.

Sat 9/125:00 am -

1 stop5h 58m

Sat 9/195:28 pm -

1 stop5h 31m

Deal found 8/19

$339

Tue 10/68:30 am -

1 stop5h 53m

Thu 10/85:18 pm -

1 stop6h 12m

Deal found 8/16

$339

Tue 12/17:30 am -

1 stop7h 02m

Tue 12/82:30 pm -

2 stops9h 09m

Deal found 8/19

$344

Sat 9/126:30 am -

1 stop6h 30m

Sat 9/197:00 am -

2 stops8h 55m

Deal found 8/19

$359

Tue 12/17:14 am -

1 stop8h 06m

Tue 12/82:26 pm -

1 stop8h 03m

Deal found 8/19

$339

Tue 10/68:35 am -

1 stop5h 48m

Thu 10/85:18 pm -

1 stop5h 41m

Deal found 8/16

$355

Thu 11/57:20 am -

1 stop7h 03m

Sun 11/82:13 pm -

1 stop8h 10m

Deal found 8/16

$359

Tue 9/82:50 pm -

2 stops8h 00m

Sat 9/126:05 am -

2 stops9h 55m

Deal found 8/17

$365

Tue 9/83:04 pm -

1 stop7h 48m

Sat 9/125:05 am -

1 stop5h 41m

Deal found 8/17

$355

Tue 10/67:30 am -

1 stop6h 53m

Thu 10/82:13 pm -

2 stops7h 51m

Deal found 8/20

$360

Tue 10/62:15 pm -

1 stop7h 40m

Thu 10/86:20 am -

1 stop5h 45m

Deal found 8/16

$371

Tue 10/67:45 am -

1 stop6h 38m

Thu 10/82:13 pm -

1 stop8h 31m

Deal found 8/20

$374

Fri 10/307:13 pm -

1 stop15h 55m

Sun 11/15:40 am -

1 stop7h 10m

Deal found 8/19

$433

Fri 10/165:05 pm -

2 stops6h 45m

Sun 10/186:00 am -

1 stop5h 20m

Deal found 8/17

$403

Thu 10/226:15 am -

1 stop8h 08m

Sun 10/255:25 pm -

1 stop6h 12m

Deal found 8/18

$425

Tue 10/64:00 pm -

2 stops6h 55m

Thu 10/85:30 am -

1 stop11h 40m

Deal found 8/16

$409

Sat 11/1412:50 pm -

1 stop7h 57m

Tue 11/171:59 pm -

1 stop5h 58m

Deal found 8/16

$429

Fri 10/307:23 am -

1 stop7h 00m

Sun 11/12:13 pm -

1 stop8h 13m

Deal found 8/20

$429

Sat 11/1412:50 pm -

1 stop7h 57m

Tue 11/171:59 pm -

1 stop7h 45m

Deal found 8/18

$429

Fri 9/49:30 am -

2 stops7h 35m

Sun 9/64:20 pm -

1 stop5h 15m

Deal found 8/20

$434

Fri 10/307:20 am -

1 stop7h 03m

Sun 11/12:13 pm -

1 stop6h 32m

Deal found 8/20

$439

Tue 9/296:05 am -

1 stop8h 18m

Sat 10/32:00 pm -

1 stop7h 34m

Deal found 8/19

$451

Last-minute flights from Washington, D.C. to Harlingen
Discover last-minute flight deals from Washington, D.C. to Harlingen. Data last updated August 21, 2026 and is based on user searches.

Sat 8/228:20 am -

1 stop6h 04m

Sat 8/291:59 pm -

1 stop5h 56m

Deal found 8/21

$433

Sat 8/292:00 pm -

1 stop7h 55m

Tue 9/1512:35 pm -

1 stop6h 25m

Deal found 8/18

$401

Sat 9/59:40 am -

1 stop7h 10m

Wed 9/912:35 pm -

1 stop6h 25m

Deal found 8/21

$351

Sat 9/56:00 am -

1 stop8h 24m

Wed 9/95:18 pm -

1 stop5h 41m

Deal found 8/21

$359

Sat 9/59:25 am -

1 stop6h 30m

Wed 9/96:35 am -

2 stops8h 15m

Deal found 8/21

$422

Tue 9/83:04 pm -

1 stop7h 48m

Sat 9/125:05 am -

1 stop5h 41m

Deal found 8/17

$355

Tue 9/82:50 pm -

2 stops8h 00m

Sat 9/1212:35 pm -

1 stop6h 50m

Deal found 8/17

$360

Sat 9/125:00 am -

1 stop5h 58m

Sat 9/195:28 pm -

1 stop5h 31m

Deal found 8/19

$339

Sat 9/126:30 am -

1 stop7h 54m

Sat 9/195:18 pm -

1 stop5h 37m

Deal found 8/19

$339

Sat 9/129:25 am -

2 stops7h 25m

Sat 9/196:05 am -

2 stops7h 55m

Deal found 8/19

$379

Sat 9/1210:55 am -

2 stops9h 00m

Sat 9/196:05 am -

2 stops9h 55m

Deal found 8/19

$381

Thu 9/2410:10 am -

1 stop8h 05m

Mon 9/2811:55 am -

1 stop6h 40m

Deal found 8/19

$359

One-way flights from Washington, D.C. to Harlingen
Search for one-way flight options from Washington, D.C. to Harlingen. Find affordable one-way fares based on user searches. Data last updated August 21, 2026.

Wed 9/210:40 am -

1 stop5h 10m

Deal found 8/19

$165

Wed 9/28:31 am -

1 stop5h 53m

Deal found 8/19

$170

Fri 9/183:25 pm -

1 stop6h 10m

Deal found 8/20

$180

Fri 9/186:50 am -

1 stop5h 30m

Deal found 8/19

$229

Wed 9/21:23 pm -

2 stops10h 31m

Deal found 8/19

$326

Fri 9/186:30 am -

1 stop14h 09m

Deal found 8/19

$340

Fri 9/181:05 pm -

1 stop7h 34m

Deal found 8/20

$346

Fri 9/1810:58 am -

1 stop6h 01m

Deal found 8/21

$403

Wed 9/27:46 am -

3 stops15h 06m

Deal found 8/19

$594

Find flight deals from Washington, D.C. to Harlingen

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$339 (American Airlines)
One-way from	$165 (Southwest)

Provider with most accurate pricing for Washington, D.C. (WAS)-Harlingen Valley Intl flight deals.

Search Deals

Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Harlingen Valley Intl flights.

Search Deals

From Washington, D.C. (WAS) to Harlingen Valley Intl

Search Deals

One-way flight from Washington, D.C. (WAS) to Harlingen Valley Intl

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

Washington, D.C.Harlingen

DCA Washington, D.C. Reagan-National - HRL Harlingen Valley Intl

DCAHRL

Washington, D.C. Reagan-National

Sat 9/12

5:00 am-9:58 am

1 stop5h 58m

Harlingen Valley Intl

Sat 9/19

5:28 pm-11:59 pm

1 stop5h 31m

$339

Washington, D.C.Harlingen

IAD Washington, D.C. Dulles Intl - HRL Harlingen Valley Intl

IADHRL

Washington, D.C. Dulles Intl

Tue 10/6

8:30 am-1:23 pm

1 stop5h 53m

Harlingen Valley Intl

Thu 10/8

5:18 pm-12:30 am

1 stop6h 12m

$339

Washington, D.C.Harlingen

IAD Washington, D.C. Dulles Intl - HRL Harlingen Valley Intl

IADHRL

Washington, D.C. Dulles Intl

Tue 12/1

7:14 am-2:20 pm

1 stop8h 06m

Harlingen Valley Intl

Tue 12/8

2:26 pm-11:29 pm

1 stop8h 03m

$339

Washington, D.C.Harlingen

IAD Washington, D.C. Dulles Intl - HRL Harlingen Valley Intl

IADHRL

Washington, D.C. Dulles Intl

Tue 12/1

7:30 am-1:32 pm

1 stop7h 02m

Harlingen Valley Intl

Tue 12/8

2:30 pm-12:39 am

2 stops9h 09m

$344

Washington, D.C.Harlingen

DCA Washington, D.C. Reagan-National - HRL Harlingen Valley Intl

DCAHRL

Washington, D.C. Reagan-National

Tue 10/6

8:35 am-1:23 pm

1 stop5h 48m

Harlingen Valley Intl

Thu 10/8

5:18 pm-11:59 pm

1 stop5h 41m

$355

BaltimoreHarlingen

BWI Baltimore/Washington - HRL Harlingen Valley Intl

BWIHRL

Baltimore/Washington

Tue 9/8

3:04 pm-9:52 pm

1 stop7h 48m

Harlingen Valley Intl

Sat 9/12

5:05 am-11:46 am

1 stop5h 41m

$355

Washington, D.C.Harlingen

DCA Washington, D.C. Reagan-National - HRL Harlingen Valley Intl

DCAHRL

Washington, D.C. Reagan-National

Sat 9/12

6:30 am-12:00 pm

1 stop6h 30m

Harlingen Valley Intl

Sat 9/19

7:00 am-4:55 pm

2 stops8h 55m

$359

BaltimoreHarlingen

BWI Baltimore/Washington - HRL Harlingen Valley Intl

BWIHRL

Baltimore/Washington

Thu 11/5

7:20 am-1:23 pm

1 stop7h 03m

Harlingen Valley Intl

Sun 11/8

2:13 pm-11:23 pm

1 stop8h 10m

$359

BaltimoreHarlingen

BWI Baltimore/Washington - HRL Harlingen Valley Intl

BWIHRL

Baltimore/Washington

Tue 10/6

7:30 am-1:23 pm

1 stop6h 53m

Harlingen Valley Intl

Thu 10/8

2:13 pm-11:04 pm

2 stops7h 51m

$360

BaltimoreHarlingen

BWI Baltimore/Washington - HRL Harlingen Valley Intl

BWIHRL

Baltimore/Washington

Tue 9/8

2:50 pm-9:50 pm

2 stops8h 00m

Harlingen Valley Intl

Sat 9/12

6:05 am-5:00 pm

2 stops9h 55m

$365

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/19

Showing 1-10 of 31 resultsSorted by cheapest first

Compare providers for flights from Washington, D.C. to Harlingen

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Washington, D.C. to Harlingen in August.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
Expedia	Price Accuracy1 star	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Washington, D.C.-Harlingen flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C.-Harlingen flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Harlingen flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Washington, D.C.-Harlingen flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C.-Harlingen flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Washington, D.C. to Harlingen

Have a flexible travel schedule? Discover the best time to fly to Harlingen from Washington, D.C. with our price prediction graph.

WAS-HRL

DCA-HRL

IAD-HRL

BWI-HRL

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. to Harlingen

WAS-HRL

DCA-HRL

IAD-HRL

BWI-HRL

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Harlingen

Peruse reviews from past customers who have flown with Southwest from Washington, D.C. to Harlingen 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.

Southwest

8.0

Very good

4,215 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Southwest

8.0

Very good

4,215 reviews

Southwest

8.0

Very good

4,215 reviews

Reviews

1 / 20

2.0

Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

What airport do you fly into for flights to Harlingen from Washington, D.C.?
Harlingen Valley Intl (HRL), located 3.7 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. to Harlingen. 2 airlines have flights to Valley Intl from Washington, D.C. on a regular basis. Booking flights from Washington, D.C. to Harlingen Valley Intl should not be difficult; the airport handles an average of 0 inbound flights from Washington, D.C. per day.
How long is the flight from Washington, D.C. to Harlingen?
For as low as $339, American Airlines can have you in Harlingen from Washington, D.C. in 5h 53m. The distance from Washington, D.C. to Harlingen is about 1462 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
What is the cheapest airline to fly from Washington, D.C. to Harlingen round-trip?
According to our current data, United Airlines ($250), offers the cheapest pricing from Washington, D.C. to Harlingen.
What are the most popular routes from Washington, D.C. to Harlingen?
While some choose either Washington, D.C. Dulles Intl - Harlingen Valley Intl or Washington, D.C. Reagan-National - Harlingen Valley Intl, Baltimore/Washington - Harlingen Valley Intl is the most popular route from Washington, D.C. to Harlingen.
Can I find deals for flights from Washington, D.C. to Harlingen that include hotel bookings?
Yes. In addition to deals on Washington, D.C. to Harlingen flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Washington, D.C. to Harlingen?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Harlingen.
Can I find deals for business class flights from Washington, D.C. to Harlingen?
Yes. Cheapflights offers flight deals from Washington, D.C. 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.

See more FAQs

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Alternative routes for Washington, D.C. to Harlingen

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Top 2 airlines flying from Washington, D.C. to Harlingen

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$250	Average$289	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$286	Average$366	FlexibilityNo cancel fee	On-time63%

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$165+ Cheap flights from Washington, D.C. (WAS) to Harlingen (HRL)

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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Washington, D.C. to Harlingen with Cheapflights

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Cheap flight deals from Washington, D.C. to Harlingen

Cheapest flights from Washington, D.C. to HarlingenExplore the most affordable flight options available from Washington, D.C. to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2026.

Explore the most affordable flight options available from Washington, D.C. to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2026.

Best flights from Washington, D.C. to HarlingenDiscover carefully curated flight deals from Washington, D.C. to Harlingen that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 21, 2026.

Discover carefully curated flight deals from Washington, D.C. to Harlingen that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 21, 2026.

Last-minute flights from Washington, D.C. to HarlingenDiscover last-minute flight deals from Washington, D.C. to Harlingen. Data last updated August 21, 2026 and is based on user searches.

Discover last-minute flight deals from Washington, D.C. to Harlingen. Data last updated August 21, 2026 and is based on user searches.

One-way flights from Washington, D.C. to HarlingenSearch for one-way flight options from Washington, D.C. to Harlingen. Find affordable one-way fares based on user searches. Data last updated August 21, 2026.

Search for one-way flight options from Washington, D.C. to Harlingen. Find affordable one-way fares based on user searches. Data last updated August 21, 2026.

Find flight deals from Washington, D.C. to Harlingen

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Cheapflights Fare Finder

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

Compare providers for flights from Washington, D.C. to Harlingen

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Washington, D.C. to Harlingen in August.

Best time to book a flight from Washington, D.C. to Harlingen

Have a flexible travel schedule? Discover the best time to fly to Harlingen from Washington, D.C. with our price prediction graph.

Cheapflights Insights

Reviews of airlines servicing Harlingen

Peruse reviews from past customers who have flown with Southwest from Washington, D.C. to Harlingen 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

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

How long is the flight from Washington, D.C. to Harlingen?

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

What are the most popular routes from Washington, D.C. to Harlingen?

Can I find deals for flights from Washington, D.C. to Harlingen that include hotel bookings?

How can I find direct flights from Washington, D.C. to Harlingen?

Can I find deals for business class flights from Washington, D.C. to Harlingen?

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Alternative routes for Washington, D.C. to Harlingen

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Other flights to Harlingen

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Washington, D.C. and Harlingen flights

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Other flights from Washington, D.C.

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Washington, D.C. to Harlingen flights

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Cheapest flights from Washington, D.C. to Harlingen
Explore the most affordable flight options available from Washington, D.C. to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2026.

Best flights from Washington, D.C. to Harlingen
Discover carefully curated flight deals from Washington, D.C. to Harlingen that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 21, 2026.

Last-minute flights from Washington, D.C. to Harlingen
Discover last-minute flight deals from Washington, D.C. to Harlingen. Data last updated August 21, 2026 and is based on user searches.

One-way flights from Washington, D.C. to Harlingen
Search for one-way flight options from Washington, D.C. to Harlingen. Find affordable one-way fares based on user searches. Data last updated August 21, 2026.