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Cheap flights from Washington, D.C. to Harlingen from $251

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Harlingen departing on 10/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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

Cheap round-trip flights

Delta Logo
6:10 am - 2:43 pmDCA-HRL
9h 33m1 stop
Delta Logo
3:39 pm - 11:25 pmHRL-DCA
6h 46m1 stop
$251Delta
Find Deal
Tue, Oct 21 - Sat, Oct 25
Delta Logo
6:18 am - 2:43 pmIAD-HRL
9h 25m1 stop
Delta Logo
3:39 pm - 11:39 pmHRL-IAD
7h 00m1 stop
$251Delta
Find Deal
Tue, Oct 21 - Tue, Oct 28
Delta Logo
7:45 am - 2:43 pmDCA-HRL
7h 58m1 stop
Delta Logo
3:39 pm - 11:25 pmHRL-DCA
6h 46m1 stop
$260Delta
Find Deal
Tue, Oct 21 - Fri, Oct 24
Delta Logo
6:18 am - 2:43 pmIAD-HRL
9h 25m1 stop
Delta Logo
3:39 pm - 11:40 pmHRL-IAD
7h 01m1 stop
$260Delta
Find Deal
Tue, Oct 21 - Mon, Oct 27
United Airlines Logo
6:00 am - 10:59 amIAD-HRL
5h 59m1 stop
United Airlines Logo
5:00 pm - 11:44 pmHRL-IAD
5h 44m1 stop
$271United Airlines
Find Deal
Sat, Nov 15 - Mon, Nov 17
Southwest Logo
2:50 pm - 9:40 pmDCA-HRL
7h 50m2 stops
Southwest Logo
2:20 pm - 11:45 pmHRL-DCA
8h 25m1 stop
$305Southwest
Find Deal
Wed, Oct 22 - Mon, Oct 27
Southwest Logo
3:55 pm - 9:55 pmBWI-HRL
7h 00m2 stops
Southwest Logo
5:45 am - 3:05 pmHRL-BWI
8h 20m2 stops
$308Southwest
Find Deal
Tue, Nov 4 - Mon, Nov 10
American Airlines Logo
5:27 pm - 11:22 pmIAD-HRL
6h 55m1 stop
American Airlines Logo
5:40 am - 4:49 pmHRL-IAD
10h 09m2 stops
$330American Airlines
Find Deal
Sat, Nov 15 - Mon, Nov 17
American Airlines Logo
6:24 am - 3:32 pmIAD-HRL
10h 08m2 stops
American Airlines Logo
5:40 am - 4:49 pmHRL-IAD
10h 09m2 stops
$335American Airlines
Find Deal
Sat, Nov 15 - Mon, Nov 17
United Airlines Logo
6:01 am - 1:19 pmIAD-HRL
8h 18m1 stop
United Airlines Logo
5:17 pm - 11:51 pmHRL-IAD
5h 34m1 stop
$337United Airlines
Find Deal
Thu, Oct 9 - Mon, Oct 13

Delta flights from Washington, D.C. to Harlingen, Texas

Our best Delta deals on Washington, D.C. to Harlingen, Texas flight tickets
Delta
Oct 21
DCA6:10 amWashington, D.C. Reagan-National
9h 33m
1 stop
HRL2:43 pmHarlingen Valley Intl
Oct 25
HRL3:39 pmHarlingen Valley Intl
6h 46m
1 stop
DCA11:25 pmWashington, D.C. Reagan-National
$251
Find similar
Delta
Oct 21
DCA7:45 amWashington, D.C. Reagan-National
7h 58m
1 stop
HRL2:43 pmHarlingen Valley Intl
Oct 24
HRL3:39 pmHarlingen Valley Intl
6h 46m
1 stop
DCA11:25 pmWashington, D.C. Reagan-National
$260
Find similar
Delta
Oct 22
DCA6:00 amWashington, D.C. Reagan-National
9h 43m
2 stops
HRL2:43 pmHarlingen Valley Intl
Oct 27
HRL3:39 pmHarlingen Valley Intl
6h 46m
1 stop
DCA11:25 pmWashington, D.C. Reagan-National
$265
Find similar

Southwest flights from Washington, D.C. to Harlingen, Texas

Our best Southwest deals on Washington, D.C. to Harlingen, Texas flight tickets
Southwest
Oct 22
DCA2:50 pmWashington, D.C. Reagan-National
7h 50m
2 stops
HRL9:40 pmHarlingen Valley Intl
Oct 27
HRL2:20 pmHarlingen Valley Intl
8h 25m
1 stop
DCA11:45 pmWashington, D.C. Reagan-National
$305
Find similar
Southwest
Nov 4
BWI3:55 pmBaltimore/Washington
7h 00m
2 stops
HRL9:55 pmHarlingen Valley Intl
Nov 10
HRL5:45 amHarlingen Valley Intl
8h 20m
2 stops
BWI3:05 pmBaltimore/Washington
$308
Find similar
Southwest
Nov 4
BWI12:35 pmBaltimore/Washington
9h 30m
1 stop
HRL9:05 pmHarlingen Valley Intl
Nov 10
HRL5:45 amHarlingen Valley Intl
8h 20m
2 stops
BWI3:05 pmBaltimore/Washington
$309
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to Harlingen, Texas 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 September 24, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Harlingen, Texas that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Harlingen

DCA - HRL

DCAHRL

Washington, D.C. Reagan-National

Tue 10/21

6:10 am-2:43 pm

1 stop9h 33m

Harlingen Valley Intl

Sat 10/25

3:39 pm-11:25 pm

1 stop6h 46m

$251

Washington, D.C.Harlingen

IAD - HRL

IADHRL

Washington, D.C. Dulles Intl

Tue 10/21

6:18 am-2:43 pm

1 stop9h 25m

Harlingen Valley Intl

Tue 10/28

3:39 pm-11:39 pm

1 stop7h 00m

$251

Washington, D.C.Harlingen

DCA - HRL

DCAHRL

Washington, D.C. Reagan-National

Tue 10/21

7:45 am-2:43 pm

1 stop7h 58m

Harlingen Valley Intl

Fri 10/24

3:39 pm-11:25 pm

1 stop6h 46m

$260

Washington, D.C.Harlingen

IAD - HRL

IADHRL

Washington, D.C. Dulles Intl

Tue 10/21

6:18 am-2:43 pm

1 stop9h 25m

Harlingen Valley Intl

Mon 10/27

3:39 pm-11:40 pm

1 stop7h 01m

$260

Washington, D.C.Harlingen

IAD - HRL

IADHRL

Washington, D.C. Dulles Intl

Sat 11/15

6:00 am-10:59 am

1 stop5h 59m

Harlingen Valley Intl

Mon 11/17

5:00 pm-11:44 pm

1 stop5h 44m

$271

Washington, D.C.Harlingen

DCA - HRL

DCAHRL

Washington, D.C. Reagan-National

Wed 10/22

2:50 pm-9:40 pm

2 stops7h 50m

Harlingen Valley Intl

Mon 10/27

2:20 pm-11:45 pm

1 stop8h 25m

$305

BaltimoreHarlingen

BWI - HRL

BWIHRL

Baltimore/Washington

Tue 11/4

3:55 pm-9:55 pm

2 stops7h 00m

Harlingen Valley Intl

Mon 11/10

5:45 am-3:05 pm

2 stops8h 20m

$308

Washington, D.C.Harlingen

IAD - HRL

IADHRL

Washington, D.C. Dulles Intl

Sat 11/15

5:27 pm-11:22 pm

1 stop6h 55m

Harlingen Valley Intl

Mon 11/17

5:40 am-4:49 pm

2 stops10h 09m

$330

Washington, D.C.Harlingen

IAD - HRL

IADHRL

Washington, D.C. Dulles Intl

Sat 11/15

6:24 am-3:32 pm

2 stops10h 08m

Harlingen Valley Intl

Mon 11/17

5:40 am-4:49 pm

2 stops10h 09m

$335

Washington, D.C.Harlingen

IAD - HRL

IADHRL

Washington, D.C. Dulles Intl

Thu 10/9

6:01 am-1:19 pm

1 stop8h 18m

Harlingen Valley Intl

Mon 10/13

5:17 pm-11:51 pm

1 stop5h 34m

$337

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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How to get the cheapest flight ticket from Washington, D.C. to Harlingen, Texas

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 day to depart on your flight to Harlingen, Texas?

The cheapest day to depart on your flight to Harlingen, Texas is on a Wednesday when prices can be found for as low as $389. This is often the case because there is less demand to fly during this day of the week. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. to Harlingen, Texas for around $567.

What is the cheapest time of day to depart on your flight to Harlingen, Texas?

Our most recent data shows that the best time of day to fly to Harlingen, Texas is in the morning. Flights from Washington, D.C. to Harlingen, Texas during this time can be as low as $444. Flights in the afternoon are often more expensive with an average ticket price of $485.

Can stopping save me money on Washington, D.C. to Harlingen, Texas flights?

You could potentially save up to 36% on your flight if you consider stops on a Washington, D.C. to Harlingen, Texas flight.

When to book flights from Washington, D.C. to Harlingen, Texas

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

Cheap Washington, D.C. to Harlingen, Texas (WAS to HRL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Harlingen, Texas

Direct flights

None
There are no direct flights from Washington, D.C. to Harlingen, Texas. There are no popular flight routes from Washington, D.C. to Harlingen, Texas.
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  • How far is Washington, D.C. to Harlingen Valley Intl by plane?

    The distance between Washington, D.C. and Harlingen Valley Intl is about 1482.9 mi. By plane, this route typically takes 5h 38m.

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

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

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. to Harlingen Valley Intl Airport.

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

    The required travel and health documents for your Harlingen Valley Intl 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 Harlingen Valley Intl 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 Washington, D.C. to Harlingen, Texas?

Best airlines flying from Washington, D.C. to Harlingen, Texas

Compare and see reviews for airlines that fly from Washington, D.C. to Harlingen, Texas with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $210Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $228Free CancellationRating
8.0
4,244 reviews
Search Southwest flights

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to Harlingen. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Washington, D.C. to Harlingen flights to just show those with flexible booking policies.

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

Once you have performed a search for Washington, D.C. to Harlingen 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 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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