$329 Find Cheap Flights from Harlingen to District of Columbia

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Harlingen to District of Columbia departing on 7/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to District of Columbia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Harlingen to District of Columbia, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Harlingen to District of Columbia, as well as popular online travel agencies
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Book Cheap Harlingen to District of Columbia Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Harlingen to District of Columbia that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Harlingen to District of Columbia

Wed, Jul 15 - Mon, Jul 20
United Airlines Logo
5:20 pm - 11:59 pm
HRL
-
DCA
5h 39m
1 stop
United Airlines Logo
2:55 pm - 9:54 pm
DCA
-
HRL
7h 59m
1 stop
$329United Airlines
Wed, Jul 15 - Mon, Jul 20
Southwest Logo
7:05 am - 4:45 pm
HRL
-
DCA
8h 40m
1 stop
Southwest Logo
5:25 pm - 9:40 pm
DCA
-
HRL
5h 15m
1 stop
$366Southwest
Tue, Sep 1 - Wed, Sep 2
United Airlines Logo
2:00 pm - 8:35 pm
HRL
-
DCA
5h 35m
1 stop
United Airlines Logo
4:35 pm - 9:44 pm
DCA
-
HRL
6h 09m
1 stop
$367United Airlines
Tue, Aug 11 - Wed, Aug 12
United Airlines Logo
5:15 am - 11:28 am
HRL
-
IAD
5h 13m
1 stop
United Airlines Logo
12:50 pm - 7:29 pm
IAD
-
HRL
7h 39m
1 stop
$367United Airlines
Wed, Jul 15 - Mon, Jul 20
Southwest Logo
7:05 am - 4:45 pm
HRL
-
DCA
8h 40m
1 stop
Southwest Logo
4:10 pm - 11:40 pm
DCA
-
HRL
8h 30m
2 stops
$385Southwest
Sat, May 23 - Fri, May 29
United Airlines Logo
5:20 pm - 12:31 am
HRL
-
IAD
6h 11m
1 stop
United Airlines Logo
2:53 pm - 7:49 pm
IAD
-
HRL
5h 56m
1 stop
$400United Airlines
Wed, Jul 15 - Mon, Jul 20
United Airlines Logo
5:20 pm - 12:31 am
HRL
-
IAD
6h 11m
1 stop
United Airlines Logo
2:53 pm - 9:54 pm
IAD
-
HRL
8h 01m
1 stop
$413United Airlines
Tue, May 19 - Sat, May 23
United Airlines Logo
5:18 pm - 11:59 pm
HRL
-
IAD
5h 41m
1 stop
United Airlines Logo
2:53 pm - 9:54 pm
IAD
-
HRL
8h 01m
1 stop
$419United Airlines
Tue, May 19 - Sat, May 23
American Airlines Logo
10:47 am - 6:00 pm
HRL
-
DCA
6h 13m
1 stop
American Airlines Logo
6:55 pm - 12:14 am
DCA
-
HRL
6h 19m
1 stop
$420American Airlines
Tue, May 19 - Sat, May 23
American Airlines Logo
10:47 am - 6:00 pm
HRL
-
DCA
6h 13m
1 stop
American Airlines Logo
5:26 pm - 12:14 am
DCA
-
HRL
7h 48m
2 stops
$426American Airlines
Booking Insights

KAYAK's insights & trends for Harlingen to District of Columbia flights

Get data-powered insights and trends into flights from Harlingen to District of Columbia to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Harlingen to District of Columbia?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Harlingen to District of Columbia were found on United Airlines ($329) and American Airlines ($420).

Good to know

Cheapest flight$357
Flight from Harlingen to Reagan Washington National Airport

FAQs - booking District of Columbia flights

  • How does KAYAK find such low prices on flights from Harlingen to District of Columbia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Harlingen to District of Columbia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Harlingen to District of Columbia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Harlingen to District of Columbia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Harlingen to District of Columbia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Harlingen to District of Columbia with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Harlingen to District of Columbia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Harlingen to District of Columbia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Harlingen to District of Columbia

 
See real verified KAYAK customer reviews for airlines flying from Harlingen to District of Columbia. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Harlingen to District of Columbia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
SouthwestOverall score based on 4305 reviews
7.5Entertainment
8.6Crew
8.0Comfort
7.0Food
8.1Boarding
Airline reviews

Truly terrible. Will never willingly fly southwest again. Seats are worse than before they switched to assigned seating. One flight attendant was the opposite of helpful (rude, unhelpful, dismissive, and as my stranger seatmate said unprompted: a total prick). This caused me, 15 minutes into the flight, to book an alternate return flight home on a competing airline (first class 1.2k purchase instead of my existing planned flight) just so I would not have to ever be on that aircraft, with that terrible service person, with those horrific seats ever again.

2.0 MediocreJoshua, May 2026
TPA - LAS
Read more Southwest reviews

Truly terrible. Will never willingly fly southwest again. Seats are worse than before they switched to assigned seating. One flight attendant was the opposite of helpful (rude, unhelpful, dismissive, and as my stranger seatmate said unprompted: a total prick). This caused me, 15 minutes into the flight, to book an alternate return flight home on a competing airline (first class 1.2k purchase instead of my existing planned flight) just so I would not have to ever be on that aircraft, with that terrible service person, with those horrific seats ever again.

Not having a five hour delay with little notice! The crew was very kind, though, and just as tired as we passengers were. The flight didn't depart until nearly 1 am...and no reason was ever given.

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

no service at all due to turbulence. they should've at least given us snacks, there were only 10 people on the entire flight.

First time I've had to use the disabled accommodations. And I could not have had a better experience with Southwest, i was having trouble getting from one terminal to another due to my heart failure. And the next thing I know a Southwest agent had made sure. I had a wheelchair at all my flights. Can't thank them enough.

The new seat assignment thing is wierd. If you don’t pay for a seat they always assign you a middle seat regardless of how many people are on the flight. Idk… the new company that bought Southwest is trying to make it more profitable, but I’m just not seeing it. The flight attendants aren’t having as much fun anymore. It just feels like the airline is slowly dying. IMO. We shall see if Southwest is the next Toy’s R Us.

The Air hostess were very rude on my flight from Houston to Austin . Their regular communication itself felt a they are shouting at people.

Plane was late. Zero service for 2+ hour flight and it was not that bumpy.

I have roller bag with food and medication told me I couldn't bring on my 2nd flight today. 15 years flying with SW never an issue with that bag.

Great flight. Good snacks and drinks. Grateful it was free. The flight from Nashville to louisville, i think her name was Tracy (not sure that's right) super awesome, nice and cheerful. She really enjoyed being at work today! She was the person who scanned the boarding pass on flight wn941. She should be recommended for a raise !

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

My bags were misplaced!!! Im in a foreign country with no bags

Great flight. Got to watch a movie. Smooth flight and early arrival at ORD.

Fine. The issues I had were associated with luggage being delayed from Turkey to Tanzania

I've been flying American mostly, and it's been very frustrating. This united flight makes me realize maybe the issue isn't flying, but the airline. United was a significantly better experience. The plane was more comfortable, with a normal amount of leg room (vs the ridiculous reductions AA has made), more comfortable seats, screens to watch movies. It was a much better experience!

We had excellent customer service despite the chaos at George Bush airport in Houston!

It isvvery small flight. No leg room . No space to put my personal item at feet.

United is one airline which regardless of how many separate United tickets in existence, if one flight breaks down, the airline will take care of all the flights.

Overall we had a good experience during our flight from San Francisco to Houston.

Airport terminal was outdated, flight was on a small jet with no wifi

Everything you need to know for your flight from Harlingen to District of Columbia

Information on your arrival and departure airports