Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Harlingen to Washington, D.C. from $159

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 9/8. 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
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
5:15 am - 11:25 am
HRL
-
DCA
5h 10m
1 stop
United Airlines Logo
8:15 am - 1:14 pm
DCA
-
HRL
5h 59m
1 stop
$367United Airlines
Tue, Sep 1 - Wed, Sep 2
United Airlines Logo
2:05 pm - 10:15 pm
HRL
-
DCA
7h 10m
1 stop
United Airlines Logo
12:59 pm - 7:49 pm
DCA
-
HRL
7h 50m
1 stop
$399United Airlines
Sat, May 23 - Fri, May 29
United Airlines Logo
12:05 pm - 9:05 pm
HRL
-
DCA
8h 00m
1 stop
United Airlines Logo
6:00 am - 11:23 am
DCA
-
HRL
6h 23m
1 stop
$418United Airlines
Wed, May 13 - Sat, May 16
Southwest Logo
4:40 pm - 11:00 pm
HRL
-
DCA
5h 20m
1 stop
Southwest Logo
6:00 am - 11:20 am
DCA
-
HRL
6h 20m
1 stop
$419Southwest
Wed, May 13 - Sun, May 17
Southwest Logo
7:10 am - 3:00 pm
HRL
-
DCA
6h 50m
2 stops
Southwest Logo
6:00 am - 11:20 am
DCA
-
HRL
6h 20m
1 stop
$424Southwest
Wed, May 13 - Sun, May 17
Southwest Logo
5:40 am - 6:00 pm
HRL
-
DCA
11h 20m
1 stop
Southwest Logo
6:10 am - 12:00 pm
DCA
-
HRL
6h 50m
1 stop
$429Southwest
Sun, Jun 14 - Sat, Aug 8
United Airlines Logo
2:05 pm - 10:15 pm
HRL
-
DCA
7h 10m
1 stop
United Airlines Logo
12:59 pm - 7:49 pm
DCA
-
HRL
7h 50m
1 stop
$451United Airlines
Sat, May 23 - Fri, May 29
United Airlines Logo
2:05 pm - 10:15 pm
HRL
-
DCA
7h 10m
1 stop
United Airlines Logo
12:59 pm - 7:49 pm
DCA
-
HRL
7h 50m
1 stop
$453United Airlines
Sat, May 23 - Fri, May 29
United Airlines Logo
2:05 pm - 10:15 pm
HRL
-
DCA
7h 10m
1 stop
United Airlines Logo
12:59 pm - 7:49 pm
DCA
-
HRL
7h 50m
1 stop
$455United Airlines
Sat, May 23 - Fri, May 29
Southwest Logo
5:40 am - 6:00 pm
HRL
-
DCA
11h 20m
1 stop
Southwest Logo
12:45 pm - 8:55 pm
DCA
-
HRL
9h 10m
2 stops
$468Southwest
Sun, Jun 14 - Sat, Aug 8

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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 1
HRL5:15 amHarlingen Valley Intl
5h 10m
1 stop
DCA11:25 amWashington, D.C. Reagan-National
Sep 2
DCA8:15 amWashington, D.C. Reagan-National
5h 59m
1 stop
HRL1:14 pmHarlingen Valley Intl
$367
United Airlines
May 23
HRL2:05 pmHarlingen Valley Intl
7h 10m
1 stop
DCA10:15 pmWashington, D.C. Reagan-National
May 29
DCA12:59 pmWashington, D.C. Reagan-National
7h 50m
1 stop
HRL7:49 pmHarlingen Valley Intl
$399
United Airlines
May 13
HRL12:05 pmHarlingen Valley Intl
8h 00m
1 stop
DCA9:05 pmWashington, D.C. Reagan-National
May 16
DCA6:00 amWashington, D.C. Reagan-National
6h 23m
1 stop
HRL11:23 amHarlingen Valley Intl
$418

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
May 13
HRL4:40 pmHarlingen Valley Intl
5h 20m
1 stop
DCA11:00 pmWashington, D.C. Reagan-National
May 17
DCA6:00 amWashington, D.C. Reagan-National
6h 20m
1 stop
HRL11:20 amHarlingen Valley Intl
$419
Southwest
May 13
HRL7:10 amHarlingen Valley Intl
6h 50m
2 stops
DCA3:00 pmWashington, D.C. Reagan-National
May 17
DCA6:00 amWashington, D.C. Reagan-National
6h 20m
1 stop
HRL11:20 amHarlingen Valley Intl
$424
Southwest
Jun 14
HRL5:40 amHarlingen Valley Intl
11h 20m
1 stop
DCA6:00 pmWashington, D.C. Reagan-National
Aug 8
DCA6:10 amWashington, D.C. Reagan-National
6h 50m
1 stop
HRL12:00 pmHarlingen Valley Intl
$429

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 May 3, 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
Quickest round-trip

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Tue 9/1

5:15 am-11:25 am

1 stop5h 10m

Washington, D.C. Reagan-National

Wed 9/2

8:15 am-1:14 pm

1 stop5h 59m

$367

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Sat 5/23

2:05 pm-10:15 pm

1 stop7h 10m

Washington, D.C. Reagan-National

Fri 5/29

12:59 pm-7:49 pm

1 stop7h 50m

$399

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Wed 5/13

12:05 pm-9:05 pm

1 stop8h 00m

Washington, D.C. Reagan-National

Sat 5/16

6:00 am-11:23 am

1 stop6h 23m

$418

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Wed 5/13

4:40 pm-11:00 pm

1 stop5h 20m

Washington, D.C. Reagan-National

Sun 5/17

6:00 am-11:20 am

1 stop6h 20m

$419

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Wed 5/13

7:10 am-3:00 pm

2 stops6h 50m

Washington, D.C. Reagan-National

Sun 5/17

6:00 am-11:20 am

1 stop6h 20m

$424

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Sun 6/14

5:40 am-6:00 pm

1 stop11h 20m

Washington, D.C. Reagan-National

Sat 8/8

6:10 am-12:00 pm

1 stop6h 50m

$429

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Sat 5/23

2:05 pm-10:15 pm

1 stop7h 10m

Washington, D.C. Reagan-National

Fri 5/29

12:59 pm-7:49 pm

1 stop7h 50m

$451

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Sat 5/23

2:05 pm-10:15 pm

1 stop7h 10m

Washington, D.C. Reagan-National

Fri 5/29

12:59 pm-7:49 pm

1 stop7h 50m

$453

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Sat 5/23

2:05 pm-10:15 pm

1 stop7h 10m

Washington, D.C. Reagan-National

Fri 5/29

12:59 pm-7:49 pm

1 stop7h 50m

$455

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Sun 6/14

5:40 am-6:00 pm

1 stop11h 20m

Washington, D.C. Reagan-National

Sat 8/8

12:45 pm-8:55 pm

2 stops9h 10m

$468

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 cheapest airline that flies from Harlingen Valley Intl to Washington, D.C. Reagan-National?

United Airlines, Southwest, and American Airlines are the most popular carriers operating from Harlingen Valley Intl to Washington, D.C. Reagan-National

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 29m

Direct flights

None
The fastest flight from Harlingen to Washington, D.C. Reagan-National Airport takes 5h 29m
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 29m, 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 $250Free CancellationRating
7.4
9,681 reviews
Search United Airlines 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
Colonial Beach
Gaithersburg
Towson
Fredericksburg
Silver Spring
Rockville
Manassas
Linthicum Heights
Tysons
Bethesda
Springfield
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.

An easier way to manage your Washington, D.C. Reagan-National Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 6/2
Tue 6/9
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Washington, D.C.