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Cheap flights from Washington, D.C. Reagan-National Airport to Harlingen from $170

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Reagan-National Airport to Harlingen departing on 9/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Washington, D.C. Reagan-National Airport to Harlingen

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
6:30 am - 12:00 pm
DCA
-
HRL
6h 30m
1 stop
Southwest Logo
4:25 pm - 10:20 pm
HRL
-
DCA
4h 55m
1 stop
$339Southwest
Sat, Aug 22 - Tue, Aug 25
United Airlines Logo
6:00 am - 1:24 pm
DCA
-
HRL
8h 24m
1 stop
United Airlines Logo
5:18 pm - 11:59 pm
HRL
-
DCA
5h 41m
1 stop
$339United Airlines
Thu, Aug 20 - Wed, Aug 26
American Airlines Logo
5:00 am - 10:13 am
DCA
-
HRL
6h 13m
1 stop
American Airlines Logo
5:40 am - 12:49 pm
HRL
-
DCA
6h 09m
1 stop
$339American Airlines
Sun, Nov 1 - Sat, Nov 7
Southwest Logo
6:55 am - 1:20 pm
DCA
-
HRL
7h 25m
1 stop
Southwest Logo
4:25 pm - 11:55 pm
HRL
-
DCA
6h 30m
2 stops
$344Southwest
Thu, Aug 20 - Wed, Aug 26
Southwest Logo
6:05 am - 11:05 am
DCA
-
HRL
6h 00m
1 stop
Southwest Logo
12:45 pm - 8:55 pm
HRL
-
DCA
7h 10m
2 stops
$344Southwest
Sun, Nov 1 - Sat, Nov 7
Southwest Logo
4:55 pm - 8:55 pm
DCA
-
HRL
5h 00m
1 stop
Southwest Logo
7:25 am - 3:50 pm
HRL
-
DCA
7h 25m
2 stops
$344Southwest
Sat, Aug 22 - Tue, Aug 25
Southwest Logo
4:35 pm - 10:35 pm
DCA
-
HRL
7h 00m
2 stops
Southwest Logo
7:25 am - 3:50 pm
HRL
-
DCA
7h 25m
2 stops
$349Southwest
Thu, Aug 20 - Wed, Aug 26
Southwest Logo
12:45 pm - 8:55 pm
DCA
-
HRL
9h 10m
2 stops
Southwest Logo
6:35 am - 2:00 pm
HRL
-
DCA
6h 25m
2 stops
$349Southwest
Sat, Aug 22 - Tue, Aug 25
United Airlines Logo
2:40 pm - 9:52 pm
DCA
-
HRL
8h 12m
1 stop
United Airlines Logo
5:18 pm - 11:59 pm
HRL
-
DCA
5h 41m
1 stop
$359United Airlines
Fri, Aug 28 - Fri, Sep 4
Southwest Logo
6:40 pm - 10:35 pm
DCA
-
HRL
4h 55m
1 stop
Southwest Logo
4:40 pm - 10:25 pm
HRL
-
DCA
4h 45m
1 stop
$374Southwest
Mon, Aug 17 - Mon, Aug 24

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United Airlines flights from Washington, D.C. Reagan-National Airport to Harlingen

Our best United Airlines deals on Washington, D.C. Reagan-National Airport to Harlingen flight tickets
United Airlines
Aug 20
DCA6:00 amWashington, D.C. Reagan-National
8h 24m
1 stop
HRL1:24 pmHarlingen Valley Intl
Aug 26
HRL5:18 pmHarlingen Valley Intl
5h 41m
1 stop
DCA11:59 pmWashington, D.C. Reagan-National
$339
United Airlines
Aug 28
DCA2:40 pmWashington, D.C. Reagan-National
8h 12m
1 stop
HRL9:52 pmHarlingen Valley Intl
Sep 4
HRL5:18 pmHarlingen Valley Intl
5h 41m
1 stop
DCA11:59 pmWashington, D.C. Reagan-National
$359
United Airlines
Aug 29
DCA8:20 amWashington, D.C. Reagan-National
6h 04m
1 stop
HRL1:24 pmHarlingen Valley Intl
Sep 2
HRL1:59 pmHarlingen Valley Intl
6h 06m
1 stop
DCA9:05 pmWashington, D.C. Reagan-National
$429

American Airlines flights from Washington, D.C. Reagan-National Airport to Harlingen

Our best American Airlines deals on Washington, D.C. Reagan-National Airport to Harlingen flight tickets
American Airlines
Aug 27
DCA11:59 amWashington, D.C. Reagan-National
8h 34m
1 stop
HRL7:33 pmHarlingen Valley Intl
Aug 31
HRL6:43 pmHarlingen Valley Intl
13h 16m
1 stop
DCA8:59 amWashington, D.C. Reagan-National
$386
American Airlines
Aug 27
DCA11:59 amWashington, D.C. Reagan-National
8h 34m
1 stop
HRL7:33 pmHarlingen Valley Intl
Aug 31
HRL6:43 pmHarlingen Valley Intl
13h 16m
1 stop
DCA8:59 amWashington, D.C. Reagan-National
$388
American Airlines
Aug 27
DCA11:59 amWashington, D.C. Reagan-National
8h 34m
1 stop
HRL7:33 pmHarlingen Valley Intl
Aug 31
HRL6:43 pmHarlingen Valley Intl
13h 16m
1 stop
DCA8:59 amWashington, D.C. Reagan-National
$409

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Reagan-National Airport to Harlingen that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 1, 2026.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Harlingen that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Harlingen

DCA - HRL

DCAHRL

Washington, D.C. Reagan-National

Sat 8/22

6:30 am-12:00 pm

1 stop6h 30m

Harlingen Valley Intl

Tue 8/25

4:25 pm-10:20 pm

1 stop4h 55m

$339

Washington, D.C.Harlingen

DCA - HRL

DCAHRL

Washington, D.C. Reagan-National

Thu 8/20

6:00 am-1:24 pm

1 stop8h 24m

Harlingen Valley Intl

Wed 8/26

5:18 pm-11:59 pm

1 stop5h 41m

$339

Washington, D.C.Harlingen

DCA - HRL

DCAHRL

Washington, D.C. Reagan-National

Sun 11/1

5:00 am-10:13 am

1 stop6h 13m

Harlingen Valley Intl

Sat 11/7

5:40 am-12:49 pm

1 stop6h 09m

$339

Washington, D.C.Harlingen

DCA - HRL

DCAHRL

Washington, D.C. Reagan-National

Thu 8/20

6:55 am-1:20 pm

1 stop7h 25m

Harlingen Valley Intl

Wed 8/26

4:25 pm-11:55 pm

2 stops6h 30m

$344

Washington, D.C.Harlingen

DCA - HRL

DCAHRL

Washington, D.C. Reagan-National

Sun 11/1

6:05 am-11:05 am

1 stop6h 00m

Harlingen Valley Intl

Sat 11/7

12:45 pm-8:55 pm

2 stops7h 10m

$344

Washington, D.C.Harlingen

DCA - HRL

DCAHRL

Washington, D.C. Reagan-National

Sat 8/22

4:55 pm-8:55 pm

1 stop5h 00m

Harlingen Valley Intl

Tue 8/25

7:25 am-3:50 pm

2 stops7h 25m

$344

Washington, D.C.Harlingen

DCA - HRL

DCAHRL

Washington, D.C. Reagan-National

Thu 8/20

4:35 pm-10:35 pm

2 stops7h 00m

Harlingen Valley Intl

Wed 8/26

7:25 am-3:50 pm

2 stops7h 25m

$349

Washington, D.C.Harlingen

DCA - HRL

DCAHRL

Washington, D.C. Reagan-National

Sat 8/22

12:45 pm-8:55 pm

2 stops9h 10m

Harlingen Valley Intl

Tue 8/25

6:35 am-2:00 pm

2 stops6h 25m

$349

Washington, D.C.Harlingen

DCA - HRL

DCAHRL

Washington, D.C. Reagan-National

Fri 8/28

2:40 pm-9:52 pm

1 stop8h 12m

Harlingen Valley Intl

Fri 9/4

5:18 pm-11:59 pm

1 stop5h 41m

$359
Quickest round-trip

Washington, D.C.Harlingen

DCA - HRL

DCAHRL

Washington, D.C. Reagan-National

Mon 8/17

6:40 pm-10:35 pm

1 stop4h 55m

Harlingen Valley Intl

Mon 8/24

4:40 pm-10:25 pm

1 stop4h 45m

$374

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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See travel insights to Harlingen from

How to get the cheapest flight ticket from Washington, D.C. Reagan-National Airport to Harlingen

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Harlingen?

If you aren’t able to travel during the month of November, then book flights to Harlingen from Washington, D.C. Reagan-National Airport during September instead. Flights to Harlingen in September, while not as cheap as those in November, still average around $189.

When to book flights from Washington, D.C. Reagan-National Airport to Harlingen

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Reagan-National Airport to Harlingen according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Reagan-National Airport to Harlingen (DCA to HRL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Reagan-National Airport to Harlingen

Fastest flight time

6h 00m

Direct flights

None
The fastest flight from Washington, D.C. Reagan-National Airport to Harlingen takes 6h 00m
There are no direct flights from Washington, D.C. Reagan-National Airport to Harlingen. There are no popular flight routes from Washington, D.C. Reagan-National Airport to Harlingen.
Search flight deals

Frequently asked questions about flying from Washington, D.C. Reagan-National Airport to Harlingen

  • How far is Washington, D.C. Reagan-National to Harlingen Valley Intl by plane?

    The distance between Washington, D.C. Reagan-National and Harlingen Valley Intl is about 1480.9 mi. 6h 00m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Washington, D.C. Reagan-National Airport to Harlingen Valley Intl Airport?

    Prices for flights from Washington, D.C. Reagan-National Airport to Harlingen Valley Intl Airport refresh daily.

  • How old do you have to be to fly from Washington, D.C. Reagan-National Airport to Harlingen Valley Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Reagan-National Airport to Harlingen Valley Intl Airport.

  • What documentation or ID do you need to fly to Harlingen Valley Intl Airport?

    The travel and health documents you'll need for your trip to Harlingen Valley Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Harlingen Valley Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Harlingen?

Finding the right flight to Harlingen from Washington, D.C. is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Harlingen quick and easy, saving you time and money.

Can I find flights from Washington, D.C. to Harlingen with flexible booking policies on momondo?

momondo does allow users to show only those flights to Harlingen from Washington, D.C. which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Washington, D.C. to Harlingen?

Once all potential Washington, D.C. to Harlingen flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Washington, D.C. to Harlingen right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington, D.C. to Harlingen now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Harlingen and let you know when they change.

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