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Cheap flights from Harlingen to Washington, D.C. from $235

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Harlingen to Washington, D.C. departing on 6/26. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Harlingen to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:18 pm - 11:59 pm
HRL
-
DCA
5h 41m
1 stop
United Airlines Logo
12:57 pm - 7:44 pm
DCA
-
HRL
7h 47m
1 stop
$353United Airlines
Thu, Sep 24 - Mon, Sep 28
United Airlines Logo
5:18 pm - 11:59 pm
HRL
-
DCA
5h 41m
1 stop
United Airlines Logo
8:20 am - 1:24 pm
DCA
-
HRL
6h 04m
1 stop
$362United Airlines
Tue, Sep 1 - Wed, Sep 2
United Airlines Logo
5:20 pm - 11:59 pm
HRL
-
DCA
5h 39m
1 stop
United Airlines Logo
2:55 pm - 7:49 pm
DCA
-
HRL
5h 54m
1 stop
$399United Airlines
Mon, Jun 29 - Fri, Jul 3
Southwest Logo
5:30 am - 2:50 pm
HRL
-
DCA
8h 20m
2 stops
Southwest Logo
12:55 pm - 5:15 pm
DCA
-
HRL
5h 20m
1 stop
$404Southwest
Thu, Sep 24 - Mon, Sep 28
United Airlines Logo
5:10 am - 11:56 am
HRL
-
DCA
5h 46m
1 stop
United Airlines Logo
2:55 pm - 7:49 pm
DCA
-
HRL
5h 54m
1 stop
$419United Airlines
Fri, Jul 17 - Tue, Jul 21
Southwest Logo
10:40 am - 5:30 pm
HRL
-
DCA
5h 50m
1 stop
Southwest Logo
6:10 pm - 11:45 pm
DCA
-
HRL
6h 35m
1 stop
$423Southwest
Fri, Jul 10 - Fri, Jul 17
Southwest Logo
5:30 am - 2:50 pm
HRL
-
DCA
8h 20m
2 stops
Southwest Logo
9:35 am - 4:05 pm
DCA
-
HRL
7h 30m
2 stops
$430Southwest
Thu, Sep 24 - Mon, Sep 28
Southwest Logo
10:40 am - 5:30 pm
HRL
-
DCA
5h 50m
1 stop
Southwest Logo
4:10 pm - 11:45 pm
DCA
-
HRL
8h 35m
2 stops
$444Southwest
Fri, Jul 10 - Fri, Jul 17
Southwest Logo
1:00 pm - 10:40 pm
HRL
-
DCA
8h 40m
2 stops
Southwest Logo
6:10 pm - 11:40 pm
DCA
-
HRL
6h 30m
1 stop
$464Southwest
Mon, Jun 29 - Fri, Jul 3
American Airlines Logo
6:00 am - 1:43 pm
HRL
-
DCA
6h 43m
1 stop
American Airlines Logo
5:00 am - 10:13 am
DCA
-
HRL
6h 13m
1 stop
$483American Airlines
Sat, Jun 27 - Wed, Jul 1

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

Our best Southwest deals on Harlingen to Washington, D.C. Reagan-National Airport flight tickets
Southwest
Sep 24
HRL5:30 amHarlingen Valley Intl
8h 20m
2 stops
DCA2:50 pmWashington, D.C. Reagan-National
Sep 28
DCA12:55 pmWashington, D.C. Reagan-National
5h 20m
1 stop
HRL5:15 pmHarlingen Valley Intl
$404
Southwest
Jul 10
HRL10:40 amHarlingen Valley Intl
5h 50m
1 stop
DCA5:30 pmWashington, D.C. Reagan-National
Jul 17
DCA6:10 pmWashington, D.C. Reagan-National
6h 35m
1 stop
HRL11:45 pmHarlingen Valley Intl
$423
Southwest
Sep 24
HRL5:30 amHarlingen Valley Intl
8h 20m
2 stops
DCA2:50 pmWashington, D.C. Reagan-National
Sep 28
DCA9:35 amWashington, D.C. Reagan-National
7h 30m
2 stops
HRL4:05 pmHarlingen Valley Intl
$430

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

Our best United Airlines deals on Harlingen to Washington, D.C. Reagan-National Airport flight tickets
United Airlines
Sep 24
HRL5:18 pmHarlingen Valley Intl
5h 41m
1 stop
DCA11:59 pmWashington, D.C. Reagan-National
Sep 28
DCA12:57 pmWashington, D.C. Reagan-National
7h 47m
1 stop
HRL7:44 pmHarlingen Valley Intl
$353
United Airlines
Sep 1
HRL5:18 pmHarlingen Valley Intl
5h 41m
1 stop
DCA11:59 pmWashington, D.C. Reagan-National
Sep 2
DCA8:20 amWashington, D.C. Reagan-National
6h 04m
1 stop
HRL1:24 pmHarlingen Valley Intl
$362
United Airlines
Jun 29
HRL5:20 pmHarlingen Valley Intl
5h 39m
1 stop
DCA11:59 pmWashington, D.C. Reagan-National
Jul 3
DCA2:55 pmWashington, D.C. Reagan-National
5h 54m
1 stop
HRL7:49 pmHarlingen Valley Intl
$399

momondo Fare Finder

 
Customize your flight search to find flights from Harlingen to Washington, D.C. Reagan-National Airport 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 June 16, 2026.
Use the filters below to find and compare flights from Harlingen to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Thu 9/24

5:18 pm-11:59 pm

1 stop5h 41m

Washington, D.C. Reagan-National

Mon 9/28

12:57 pm-7:44 pm

1 stop7h 47m

$353

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Tue 9/1

5:18 pm-11:59 pm

1 stop5h 41m

Washington, D.C. Reagan-National

Wed 9/2

8:20 am-1:24 pm

1 stop6h 04m

$362
Quickest round-trip

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Mon 6/29

5:20 pm-11:59 pm

1 stop5h 39m

Washington, D.C. Reagan-National

Fri 7/3

2:55 pm-7:49 pm

1 stop5h 54m

$399

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Thu 9/24

5:30 am-2:50 pm

2 stops8h 20m

Washington, D.C. Reagan-National

Mon 9/28

12:55 pm-5:15 pm

1 stop5h 20m

$404

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Fri 7/17

5:10 am-11:56 am

1 stop5h 46m

Washington, D.C. Reagan-National

Tue 7/21

2:55 pm-7:49 pm

1 stop5h 54m

$419

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Fri 7/10

10:40 am-5:30 pm

1 stop5h 50m

Washington, D.C. Reagan-National

Fri 7/17

6:10 pm-11:45 pm

1 stop6h 35m

$423

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Thu 9/24

5:30 am-2:50 pm

2 stops8h 20m

Washington, D.C. Reagan-National

Mon 9/28

9:35 am-4:05 pm

2 stops7h 30m

$430

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Fri 7/10

10:40 am-5:30 pm

1 stop5h 50m

Washington, D.C. Reagan-National

Fri 7/17

4:10 pm-11:45 pm

2 stops8h 35m

$444

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Mon 6/29

1:00 pm-10:40 pm

2 stops8h 40m

Washington, D.C. Reagan-National

Fri 7/3

6:10 pm-11:40 pm

1 stop6h 30m

$464

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Sat 6/27

6:00 am-1:43 pm

1 stop6h 43m

Washington, D.C. Reagan-National

Wed 7/1

5:00 am-10:13 am

1 stop6h 13m

$483

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 Washington, D.C. from

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

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 typical price of a round-trip flight between Harlingen and Washington, D.C. Reagan-National Airport?

What is the cheapest month to fly to Washington, D.C. Reagan-National Airport?

The month of November is, on average, the cheapest month to fly to Washington, D.C. Reagan-National Airport from Harlingen, with most prices found around $0. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of November, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $0.

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

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

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

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

Fastest flight time

5h 46m

Direct flights

None
The fastest flight from Harlingen to Washington, D.C. Reagan-National Airport takes 5h 46m
There are no direct flights from Harlingen to Washington, D.C. Reagan-National Airport. There are no popular flight routes from Harlingen to Washington, D.C. Reagan-National Airport.
Search flight deals

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

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

    Harlingen Valley Intl and Washington, D.C. Reagan-National are 1480.9 mi apart from one another. Flights usually cover this in 5h 46m, depending on flying conditions and air traffic around both airports.

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

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

  • How many operators does momondo search for flights from Harlingen Valley Intl Airport to Washington, D.C. Reagan-National Airport?

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Harlingen Valley Intl Airport to Washington, D.C. Reagan-National Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Reagan-National Airport?

    The required travel and health documents for your Washington, D.C. Reagan-National Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Reagan-National Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Harlingen to Washington, D.C. Reagan-National Airport?

Best airlines flying from Harlingen to Washington, D.C. Reagan-National Airport

Compare and see reviews for airlines that fly from Harlingen to Washington, D.C. Reagan-National Airport with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $270Free CancellationRating
7.4
9,842 reviews
Search United Airlines flights
SouthwestPriceFrom $328Free CancellationRating
7.9
4,237 reviews
Search Southwest flights

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Waldorf
Woodbridge
Laurel
Fredericksburg
Gaithersburg
Colonial Beach
Rockville
Linthicum Heights
Silver Spring
Towson
Manassas
Tysons
Springfield
Bethesda
Fairfax
College Park

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington, D.C. from Harlingen.

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

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

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

Once you have performed a search for Harlingen to Washington, D.C. flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes momondo offers price alerts on flights to Washington, D.C. from Harlingen. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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