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Cheap flights from Harlingen, Texas to Washington, D.C. from $255

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, Texas to Washington, D.C. departing on 3/18. 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

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

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
2:00 pm - 8:35 pm
HRL
-
DCA
5h 35m
1 stop
United Airlines Logo
11:05 am - 3:34 pm
DCA
-
HRL
5h 29m
1 stop
$297United Airlines
Tue, Sep 1 - Tue, Sep 8
United Airlines Logo
5:18 pm - 11:58 pm
HRL
-
DCA
5h 40m
1 stop
United Airlines Logo
11:05 am - 4:04 pm
DCA
-
HRL
5h 59m
1 stop
$329United Airlines
Thu, Apr 30 - Mon, May 4
United Airlines Logo
12:10 pm - 8:50 pm
HRL
-
DCA
7h 40m
1 stop
United Airlines Logo
2:35 pm - 9:59 pm
DCA
-
HRL
8h 24m
1 stop
$351United Airlines
Sat, May 2 - Tue, May 5
United Airlines Logo
5:18 pm - 11:58 pm
HRL
-
DCA
5h 40m
1 stop
United Airlines Logo
2:35 pm - 8:00 pm
DCA
-
HRL
6h 25m
1 stop
$371United Airlines
Sat, May 2 - Tue, May 5
Delta Logo
4:02 pm - 11:43 pm
HRL
-
DCA
6h 41m
1 stop
Delta Logo
6:00 am - 3:05 pm
DCA
-
HRL
10h 05m
2 stops
$372Delta
Thu, Apr 30 - Mon, May 4
American Airlines Logo
10:02 am - 6:27 pm
HRL
-
DCA
7h 25m
2 stops
American Airlines Logo
5:00 am - 9:32 am
DCA
-
HRL
5h 32m
1 stop
$378American Airlines
Tue, Sep 1 - Tue, Sep 8
United Airlines Logo
5:25 pm - 11:50 pm
HRL
-
DCA
5h 25m
1 stop
United Airlines Logo
8:30 am - 4:04 pm
DCA
-
HRL
8h 34m
1 stop
$396United Airlines
Fri, Mar 27 - Tue, Mar 31
Southwest Logo
5:00 pm - 11:25 pm
HRL
-
DCA
5h 25m
1 stop
Southwest Logo
6:35 pm - 11:00 pm
DCA
-
HRL
5h 25m
1 stop
$404Southwest
Mon, May 4 - Thu, May 21
Southwest Logo
6:00 am - 2:00 pm
HRL
-
DCA
7h 00m
2 stops
Southwest Logo
6:35 pm - 11:00 pm
DCA
-
HRL
5h 25m
1 stop
$409Southwest
Mon, May 4 - Thu, May 21
Southwest Logo
1:45 pm - 11:05 pm
HRL
-
DCA
8h 20m
2 stops
Southwest Logo
10:45 am - 4:45 pm
DCA
-
HRL
7h 00m
2 stops
$422Southwest
Tue, Sep 1 - Tue, Sep 8

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

Our best United Airlines deals on Harlingen, Texas to Washington, D.C. Reagan-National Airport flight tickets
United Airlines
Sep 1
HRL2:00 pmHarlingen Valley Intl
5h 35m
1 stop
DCA8:35 pmWashington, D.C. Reagan-National
Sep 8
DCA11:05 amWashington, D.C. Reagan-National
5h 29m
1 stop
HRL3:34 pmHarlingen Valley Intl
$297
United Airlines
Apr 30
HRL5:18 pmHarlingen Valley Intl
5h 40m
1 stop
DCA11:58 pmWashington, D.C. Reagan-National
May 4
DCA11:05 amWashington, D.C. Reagan-National
5h 59m
1 stop
HRL4:04 pmHarlingen Valley Intl
$329
United Airlines
May 2
HRL12:10 pmHarlingen Valley Intl
7h 40m
1 stop
DCA8:50 pmWashington, D.C. Reagan-National
May 5
DCA2:35 pmWashington, D.C. Reagan-National
8h 24m
1 stop
HRL9:59 pmHarlingen Valley Intl
$351

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

Our best Delta deals on Harlingen, Texas to Washington, D.C. Reagan-National Airport flight tickets
Delta
Apr 30
HRL4:02 pmHarlingen Valley Intl
6h 41m
1 stop
DCA11:43 pmWashington, D.C. Reagan-National
May 4
DCA6:00 amWashington, D.C. Reagan-National
10h 05m
2 stops
HRL3:05 pmHarlingen Valley Intl
$372
Delta
Mar 29
HRL4:04 pmHarlingen Valley Intl
6h 31m
1 stop
DCA11:35 pmWashington, D.C. Reagan-National
Apr 2
DCA6:00 amWashington, D.C. Reagan-National
10h 09m
2 stops
HRL3:09 pmHarlingen Valley Intl
$524

momondo Fare Finder

 
Customize your flight search to find flights from Harlingen, Texas 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 March 16, 2026.
Use the filters below to find and compare flights from Harlingen, Texas 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

Tue 9/1

2:00 pm-8:35 pm

1 stop5h 35m

Washington, D.C. Reagan-National

Tue 9/8

11:05 am-3:34 pm

1 stop5h 29m

$297

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Thu 4/30

5:18 pm-11:58 pm

1 stop5h 40m

Washington, D.C. Reagan-National

Mon 5/4

11:05 am-4:04 pm

1 stop5h 59m

$329

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Sat 5/2

12:10 pm-8:50 pm

1 stop7h 40m

Washington, D.C. Reagan-National

Tue 5/5

2:35 pm-9:59 pm

1 stop8h 24m

$351

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Sat 5/2

5:18 pm-11:58 pm

1 stop5h 40m

Washington, D.C. Reagan-National

Tue 5/5

2:35 pm-8:00 pm

1 stop6h 25m

$371

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Thu 4/30

4:02 pm-11:43 pm

1 stop6h 41m

Washington, D.C. Reagan-National

Mon 5/4

6:00 am-3:05 pm

2 stops10h 05m

$372

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Tue 9/1

10:02 am-6:27 pm

2 stops7h 25m

Washington, D.C. Reagan-National

Tue 9/8

5:00 am-9:32 am

1 stop5h 32m

$378

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Fri 3/27

5:25 pm-11:50 pm

1 stop5h 25m

Washington, D.C. Reagan-National

Tue 3/31

8:30 am-4:04 pm

1 stop8h 34m

$396
Quickest round-trip

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Mon 5/4

5:00 pm-11:25 pm

1 stop5h 25m

Washington, D.C. Reagan-National

Thu 5/21

6:35 pm-11:00 pm

1 stop5h 25m

$404

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Mon 5/4

6:00 am-2:00 pm

2 stops7h 00m

Washington, D.C. Reagan-National

Thu 5/21

6:35 pm-11:00 pm

1 stop5h 25m

$409

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Tue 9/1

1:45 pm-11:05 pm

2 stops8h 20m

Washington, D.C. Reagan-National

Tue 9/8

10:45 am-4:45 pm

2 stops7h 00m

$422

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

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

Are you open to changing your travel dates? Check out the ideal times to fly from Harlingen, Texas 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, Texas 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, Texas to Washington, D.C. Reagan-National Airport

Fastest flight time

5h 25m

Direct flights

None
The fastest flight from Harlingen, Texas to Washington, D.C. Reagan-National Airport takes 5h 25m
There are no direct flights from Harlingen, Texas to Washington, D.C. Reagan-National Airport. There are no popular flight routes from Harlingen, Texas to Washington, D.C. Reagan-National Airport.
Search flight deals

  • 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 25m, 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, Texas to Washington, D.C. Reagan-National Airport?

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

Compare and see reviews for airlines that fly from Harlingen, Texas to Washington, D.C. Reagan-National Airport with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $250Free CancellationRating
7.4
9,428 reviews
Search United Airlines flights

  • How do I get Price Alerts for flights from Harlingen, Texas to Washington, D.C. Reagan-National Airport?

    Search flight deals from Harlingen, Texas to Washington, D.C. Reagan-National Airport. While viewing offers you’ll have the option to create a Price Alert.

  • How can I save money on flights from Harlingen, Texas to Washington, D.C. Reagan-National Airport with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

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
Colonial Beach
Laurel
Towson
Gaithersburg
Silver Spring
Fredericksburg
Rockville
Tysons
Manassas
Springfield
Linthicum Heights
Bethesda
Fairfax
Reston

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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