What is the cheapest airline that flies from Harlingen Valley Intl to District of Columbia?

Southwest and United Airlines are the most popular carriers operating from Harlingen Valley Intl to District of Columbia

What airlines fly to District of Columbia?

United Airlines, American Airlines and Southwest are the top three most popular airlines that fly to District of Columbia from Harlingen according to our data. United Airlines is the first choice among our users, with 56% of people opting to fly with this airline when traveling to District of Columbia. Keep in mind that there are 3 different airlines that fly to District of Columbia on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Harlingen Valley Intl Airport to District of Columbia?

Prices for flights from Harlingen Valley Intl Airport to District of Columbia refresh daily.

How many operators does momondo search for flights from Harlingen Valley Intl Airport to District of Columbia?

The number of operators available for flights from Harlingen Valley Intl Airport to District of Columbia is 2 as of June 2026.

How old do you have to be to fly from Harlingen Valley Intl Airport to District of Columbia?

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 Harlingen Valley Intl Airport to District of Columbia.

What documentation or ID do you need to fly to District of Columbia?

The necessary travel and health documents for your District of Columbia trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$165 Cheap Flights from Harlingen to District of Columbia in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Harlingen to District of Columbia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:00 pm - 11:29 pm

HRL

DCA

8h 29m

1 stop

6:10 am - 1:31 pm

DCA

HRL

8h 21m

1 stop

$306Delta

Thu, Oct 22 - Thu, Nov 19

10:55 am - 5:20 pm

HRL

DCA

5h 25m

1 stop

2:40 pm - 9:45 pm

DCA

HRL

8h 05m

2 stops

$325Southwest

Thu, Oct 22 - Thu, Nov 19

7:15 am - 4:04 pm

HRL

DCA

7h 49m

1 stop

10:58 am - 3:59 pm

DCA

HRL

6h 01m

1 stop

$362United Airlines

Tue, Sep 1 - Wed, Sep 2

5:30 am - 2:10 pm

HRL

DCA

7h 40m

2 stops

2:40 pm - 9:45 pm

DCA

HRL

8h 05m

2 stops

$372Southwest

Thu, Oct 22 - Thu, Nov 19

1:59 pm - 10:30 pm

HRL

IAD

7h 31m

1 stop

3:02 pm - 9:52 pm

IAD

HRL

7h 50m

1 stop

$396United Airlines

Wed, Sep 30 - Sat, Oct 3

5:18 pm - 11:59 pm

HRL

DCA

5h 41m

1 stop

8:20 am - 1:24 pm

DCA

HRL

6h 04m

1 stop

$403United Airlines

Tue, Sep 1 - Wed, Sep 2

5:18 pm - 11:59 pm

HRL

DCA

5h 41m

1 stop

6:00 am - 1:24 pm

DCA

HRL

8h 24m

1 stop

$408United Airlines

Tue, Sep 1 - Wed, Sep 2

1:59 pm - 10:13 pm

HRL

DCA

7h 14m

1 stop

10:58 am - 3:59 pm

DCA

HRL

6h 01m

1 stop

$419United Airlines

Tue, Sep 1 - Wed, Sep 2

2:10 pm - 11:15 pm

HRL

DCA

8h 05m

2 stops

6:05 am - 12:05 pm

DCA

HRL

7h 00m

1 stop

$423Southwest

Wed, Jun 24 - Tue, Jun 30

1:15 pm - 11:55 pm

HRL

DCA

9h 40m

1 stop

6:10 pm - 11:45 pm

DCA

HRL

6h 35m

1 stop

$429Southwest

Mon, Jul 13 - Fri, Jul 17

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United Airlines flights from Harlingen to District of Columbia

Our best United Airlines deals on Harlingen to District of Columbia flight tickets

United Airlines

Sep 1

HRL7:15 amHarlingen Valley Intl

7h 49m

1 stop

DCA4:04 pmWashington, D.C. Reagan-National

Sep 2

DCA10:58 amWashington, D.C. Reagan-National

6h 01m

1 stop

HRL3:59 pmHarlingen Valley Intl

$362

United Airlines

Sep 30

HRL1:59 pmHarlingen Valley Intl

7h 31m

1 stop

IAD10:30 pmWashington, D.C. Dulles Intl

Oct 3

IAD3:02 pmWashington, D.C. Dulles Intl

7h 50m

1 stop

HRL9:52 pmHarlingen Valley Intl

$396

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

$403

American Airlines flights from Harlingen to District of Columbia

Our best American Airlines deals on Harlingen to District of Columbia flight tickets

American Airlines

Jun 19

HRL4:57 pmHarlingen Valley Intl

6h 02m

1 stop

DCA11:59 pmWashington, D.C. Reagan-National

Jun 23

DCA1:53 pmWashington, D.C. Reagan-National

6h 41m

1 stop

HRL7:34 pmHarlingen Valley Intl

$479

American Airlines

Jun 13

HRL5:18 pmHarlingen Valley Intl

5h 41m

1 stop

DCA11:59 pmWashington, D.C. Reagan-National

Jun 15

DCA1:53 pmWashington, D.C. Reagan-National

6h 41m

1 stop

HRL7:34 pmHarlingen Valley Intl

$610

American Airlines

Jul 7

HRL6:00 amHarlingen Valley Intl

28h 07m

1 stop

IAD11:07 amWashington, D.C. Dulles Intl

Aug 3

IAD6:14 amWashington, D.C. Dulles Intl

11h 09m

1 stop

HRL4:23 pmHarlingen Valley Intl

$621

momondo Fare Finder

Use the filters below to find and compare flights from Harlingen to District of Columbia 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 10/22

2:00 pm-11:29 pm

1 stop8h 29m

Washington, D.C. Reagan-National

Thu 11/19

6:10 am-1:31 pm

1 stop8h 21m

$306

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Thu 10/22

10:55 am-5:20 pm

1 stop5h 25m

Washington, D.C. Reagan-National

Thu 11/19

2:40 pm-9:45 pm

2 stops8h 05m

$325

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Tue 9/1

7:15 am-4:04 pm

1 stop7h 49m

Washington, D.C. Reagan-National

Wed 9/2

10:58 am-3:59 pm

1 stop6h 01m

$362

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Thu 10/22

5:30 am-2:10 pm

2 stops7h 40m

Washington, D.C. Reagan-National

Thu 11/19

2:40 pm-9:45 pm

2 stops8h 05m

$372

HarlingenWashington, D.C.

HRL - IAD

HRLIAD

Harlingen Valley Intl

Wed 9/30

1:59 pm-10:30 pm

1 stop7h 31m

Washington, D.C. Dulles Intl

Sat 10/3

3:02 pm-9:52 pm

1 stop7h 50m

$396

Quickest round-trip

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

$403

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

6:00 am-1:24 pm

1 stop8h 24m

$408

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Tue 9/1

1:59 pm-10:13 pm

1 stop7h 14m

Washington, D.C. Reagan-National

Wed 9/2

10:58 am-3:59 pm

1 stop6h 01m

$419

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Wed 6/24

2:10 pm-11:15 pm

2 stops8h 05m

Washington, D.C. Reagan-National

Tue 6/30

6:05 am-12:05 pm

1 stop7h 00m

$423

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Mon 7/13

1:15 pm-11:55 pm

1 stop9h 40m

Washington, D.C. Reagan-National

Fri 7/17

6:10 pm-11:45 pm

1 stop6h 35m

$429

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Harlingen to District of Columbia

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

Prices

Airlines

What is the cheapest month to fly to District of Columbia?

In general, November is the cheapest month to fly from Harlingen to District of Columbia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you don’t want to visit District of Columbia in November, then you should wait until February to fly from Harlingen, when ticket prices are also cheap, with an average price of $0.

Cheap Harlingen to District of Columbia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Harlingen to District of Columbia

Fastest flight time	5h 37m
Direct flights	None

The fastest flight from Harlingen to District of Columbia takes 5h 37m

There are no direct flights from Harlingen to District of Columbia. There are no popular flight routes from Harlingen to District of Columbia.

Search flight deals

Frequently asked questions about flying from Harlingen to District of Columbia

When did momondo last update prices for flights from Harlingen Valley Intl Airport to District of Columbia?
Prices for flights from Harlingen Valley Intl Airport to District of Columbia refresh daily.
How many operators does momondo search for flights from Harlingen Valley Intl Airport to District of Columbia?
The number of operators available for flights from Harlingen Valley Intl Airport to District of Columbia is 2 as of June 2026.
How old do you have to be to fly from Harlingen Valley Intl Airport to District of Columbia?
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 Harlingen Valley Intl Airport to District of Columbia.
What documentation or ID do you need to fly to District of Columbia?
The necessary travel and health documents for your District of Columbia trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Harlingen to District of Columbia

Compare and see reviews for airlines that fly from Harlingen to District of Columbia with momondo

Airline	Rating	Free Cancellation	Price
Southwest	PriceFrom $155	Free Cancellation	Rating 7.9 4,243 reviews		Search Southwest flights
United Airlines	PriceFrom $270	Free Cancellation	Rating 7.4 9,794 reviews		Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Harlingen to District of Columbia?

It is quick and easy to find Harlingen to District of Columbia flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to District of Columbia that suits you.

Can I find flights from Harlingen to District of Columbia with flexible booking policies on momondo?

Yes. All flights to District of Columbia from Harlingen on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Harlingen to District of Columbia?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Harlingen to District of Columbia.

I’m not ready to book a flight from Harlingen to District of Columbia right now. Can momondo alert me if prices change?

Price alerts on flights to District of Columbia from Harlingen are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.