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

United Airlines, Delta, and Southwest 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 57% 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 July 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.

3:25 pm - 11:15 pm

HRL

DCA

6h 50m

1 stop

6:40 pm - 10:35 pm

DCA

HRL

4h 55m

1 stop

$329Southwest

Wed, Sep 23 - Mon, Sep 28

12:40 pm - 8:55 pm

HRL

DCA

7h 15m

1 stop

8:00 am - 3:15 pm

DCA

HRL

8h 15m

2 stops

$334Southwest

Sat, Oct 31 - Sat, Nov 7

5:18 pm - 12:30 am

HRL

IAD

6h 12m

1 stop

8:31 am - 3:59 pm

IAD

HRL

8h 28m

1 stop

$334United Airlines

Fri, Aug 28 - Mon, Aug 31

2:13 pm - 11:21 pm

HRL

IAD

8h 08m

1 stop

7:25 am - 1:23 pm

IAD

HRL

6h 58m

1 stop

$339Delta

Fri, Oct 23 - Tue, Oct 27

12:40 pm - 8:45 pm

HRL

DCA

7h 05m

2 stops

8:00 am - 3:15 pm

DCA

HRL

8h 15m

2 stops

$339Southwest

Sat, Oct 31 - Sat, Nov 7

2:13 pm - 11:11 pm

HRL

IAD

7h 58m

2 stops

7:25 am - 1:23 pm

IAD

HRL

6h 58m

1 stop

$344Delta

Fri, Oct 23 - Tue, Oct 27

2:00 pm - 11:33 pm

HRL

IAD

8h 33m

1 stop

7:30 am - 1:31 pm

IAD

HRL

7h 01m

1 stop

$349Delta

Fri, Nov 13 - Sun, Nov 15

10:40 am - 6:23 pm

HRL

IAD

6h 43m

1 stop

7:18 am - 2:20 pm

IAD

HRL

8h 02m

1 stop

$352American Airlines

Sat, Oct 31 - Sat, Nov 7

5:10 am - 11:56 am

HRL

DCA

5h 46m

1 stop

12:59 pm - 7:49 pm

DCA

HRL

7h 50m

1 stop

$364United Airlines

Fri, Aug 7 - Mon, Aug 10

6:00 am - 1:59 pm

HRL

DCA

6h 59m

1 stop

11:59 am - 6:13 pm

DCA

HRL

7h 14m

1 stop

$399American Airlines

Tue, Aug 4 - Sat, Aug 8

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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

Aug 28

HRL5:18 pmHarlingen Valley Intl

6h 12m

1 stop

IAD12:30 amWashington, D.C. Dulles Intl

Aug 31

IAD8:31 amWashington, D.C. Dulles Intl

8h 28m

1 stop

HRL3:59 pmHarlingen Valley Intl

$334

United Airlines

Aug 7

HRL5:10 amHarlingen Valley Intl

5h 46m

1 stop

DCA11:56 amWashington, D.C. Reagan-National

Aug 10

DCA12:59 pmWashington, D.C. Reagan-National

7h 50m

1 stop

HRL7:49 pmHarlingen Valley Intl

$364

United Airlines

Aug 20

HRL5:18 pmHarlingen Valley Intl

6h 12m

1 stop

IAD12:30 amWashington, D.C. Dulles Intl

Aug 22

IAD6:30 amWashington, D.C. Dulles Intl

7h 54m

1 stop

HRL1:24 pmHarlingen Valley Intl

$419

Delta flights from Harlingen to District of Columbia

Our best Delta deals on Harlingen to District of Columbia flight tickets

Delta

Oct 23

HRL2:13 pmHarlingen Valley Intl

8h 08m

1 stop

IAD11:21 pmWashington, D.C. Dulles Intl

Oct 27

IAD7:25 amWashington, D.C. Dulles Intl

6h 58m

1 stop

HRL1:23 pmHarlingen Valley Intl

$339

Delta

Oct 23

HRL2:13 pmHarlingen Valley Intl

7h 58m

2 stops

IAD11:11 pmWashington, D.C. Dulles Intl

Oct 27

IAD7:25 amWashington, D.C. Dulles Intl

6h 58m

1 stop

HRL1:23 pmHarlingen Valley Intl

$344

Delta

Nov 13

HRL2:00 pmHarlingen Valley Intl

8h 33m

1 stop

IAD11:33 pmWashington, D.C. Dulles Intl

Nov 15

IAD7:30 amWashington, D.C. Dulles Intl

7h 01m

1 stop

HRL1:31 pmHarlingen Valley Intl

$349

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

Quickest round-trip

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Wed 9/23

3:25 pm-11:15 pm

1 stop6h 50m

Washington, D.C. Reagan-National

Mon 9/28

6:40 pm-10:35 pm

1 stop4h 55m

$329

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Sat 10/31

12:40 pm-8:55 pm

1 stop7h 15m

Washington, D.C. Reagan-National

Sat 11/7

8:00 am-3:15 pm

2 stops8h 15m

$334

HarlingenWashington, D.C.

HRL - IAD

HRLIAD

Harlingen Valley Intl

Fri 8/28

5:18 pm-12:30 am

1 stop6h 12m

Washington, D.C. Dulles Intl

Mon 8/31

8:31 am-3:59 pm

1 stop8h 28m

$334

HarlingenWashington, D.C.

HRL - IAD

HRLIAD

Harlingen Valley Intl

Fri 10/23

2:13 pm-11:21 pm

1 stop8h 08m

Washington, D.C. Dulles Intl

Tue 10/27

7:25 am-1:23 pm

1 stop6h 58m

$339

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Sat 10/31

12:40 pm-8:45 pm

2 stops7h 05m

Washington, D.C. Reagan-National

Sat 11/7

8:00 am-3:15 pm

2 stops8h 15m

$339

HarlingenWashington, D.C.

HRL - IAD

HRLIAD

Harlingen Valley Intl

Fri 10/23

2:13 pm-11:11 pm

2 stops7h 58m

Washington, D.C. Dulles Intl

Tue 10/27

7:25 am-1:23 pm

1 stop6h 58m

$344

HarlingenWashington, D.C.

HRL - IAD

HRLIAD

Harlingen Valley Intl

Fri 11/13

2:00 pm-11:33 pm

1 stop8h 33m

Washington, D.C. Dulles Intl

Sun 11/15

7:30 am-1:31 pm

1 stop7h 01m

$349

HarlingenWashington, D.C.

HRL - IAD

HRLIAD

Harlingen Valley Intl

Sat 10/31

10:40 am-6:23 pm

1 stop6h 43m

Washington, D.C. Dulles Intl

Sat 11/7

7:18 am-2:20 pm

1 stop8h 02m

$352

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Fri 8/7

5:10 am-11:56 am

1 stop5h 46m

Washington, D.C. Reagan-National

Mon 8/10

12:59 pm-7:49 pm

1 stop7h 50m

$364

HarlingenWashington, D.C.

HRL - DCA

HRLDCA

Harlingen Valley Intl

Tue 8/4

6:00 am-1:59 pm

1 stop6h 59m

Washington, D.C. Reagan-National

Sat 8/8

11:59 am-6:13 pm

1 stop7h 14m

$399

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	4h 45m
Direct flights	None

The fastest flight from Harlingen to District of Columbia takes 4h 45m

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 July 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
United Airlines	PriceFrom $270	Free Cancellation	Rating 7.4 10,026 reviews		Search United Airlines flights
Southwest	PriceFrom $290	Free Cancellation	Rating 8.0 4,236 reviews		Search Southwest 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.