WAS - HRL

$237 Find Cheap Flights from Washington, D.C. to Harlingen

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Harlingen departing on 9/8. 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

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Harlingen, 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 Washington, D.C. to Harlingen, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Washington, D.C. to Harlingen (WAS-HRL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. to Harlingen 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 Washington, D.C. to Harlingen

Mon, Sep 8 - Wed, Sep 10
Southwest Logo
6:55 am - 1:00 pmDCA-HRL
7h 05m1 stop
Southwest Logo
2:10 pm - 10:45 pmHRL-DCA
7h 35m1 stop
$237Southwest
Find Deal
Mon, Sep 8 - Wed, Sep 10
American Airlines Logo
5:40 pm - 10:57 pmIAD-HRL
6h 17m1 stop
American Airlines Logo
2:51 pm - 10:49 pmHRL-IAD
6h 58m1 stop
$237American Airlines
Find Deal
Mon, Sep 8 - Wed, Sep 10
Southwest Logo
6:05 am - 1:00 pmDCA-HRL
7h 55m2 stops
Southwest Logo
3:55 pm - 10:45 pmHRL-DCA
5h 50m1 stop
$242Southwest
Find Deal
Wed, Sep 3 - Sat, Sep 6
American Airlines Logo
5:00 am - 9:41 amDCA-HRL
5h 41m1 stop
American Airlines Logo
5:46 am - 12:37 pmHRL-DCA
5h 51m1 stop
$247American Airlines
Find Deal
Wed, Sep 3 - Sat, Sep 6
American Airlines Logo
6:25 am - 2:19 pmIAD-HRL
8h 54m1 stop
American Airlines Logo
10:11 am - 4:50 pmHRL-IAD
5h 39m1 stop
$247American Airlines
Find Deal
Wed, Sep 3 - Sat, Sep 6
American Airlines Logo
3:15 pm - 10:57 pmDCA-HRL
8h 42m2 stops
American Airlines Logo
6:30 pm - 1:15 amHRL-DCA
5h 45m1 stop
$252American Airlines
Find Deal
Thu, Nov 20 - Tue, Dec 2
Delta Logo
6:19 am - 2:26 pmBWI-HRL
9h 07m1 stop
Delta Logo
3:00 pm - 11:47 pmHRL-BWI
7h 47m1 stop
$293Delta
Find Deal
Thu, Nov 20 - Tue, Dec 2
Delta Logo
6:15 am - 2:26 pmIAD-HRL
9h 11m1 stop
Delta Logo
3:00 pm - 11:34 pmHRL-IAD
7h 34m1 stop
$313Delta
Find Deal
Sat, Jul 12 - Fri, Jul 18
United Airlines Logo
6:00 am - 1:20 pmDCA-HRL
8h 20m1 stop
United Airlines Logo
1:59 pm - 10:15 pmHRL-DCA
7h 16m1 stop
$317United Airlines
Find Deal
Thu, Jun 26 - Mon, Jun 30
United Airlines Logo
8:20 am - 4:00 pmDCA-HRL
8h 40m1 stop
United Airlines Logo
5:20 pm - 11:59 pmHRL-DCA
5h 39m1 stop
$357United Airlines
Find Deal
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KAYAK's insights & trends for Washington, D.C. to Harlingen flights

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

What’s the cheapest day of the week to fly from Washington, D.C. to Harlingen?

The average price of all round-trip flights from Washington, D.C. to Harlingen clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Washington, D.C. to Harlingen, look for departures on Wednesdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Harlingen, Tuesday is the cheapest day to fly and Wednesday is the most expensive.

Good to know

Low seasonFebruary
High seasonJuly
Cheapest flight$237
Best time to beat the crowds with an average 34% drop in price.
Most popular time to fly with an average 60% increase in price.
Flight from Reagan Washington National Airport to Harlingen

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

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Harlingen based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Washington, D.C. to Harlingen

  • What is the cheapest flight from Washington, D.C. to Harlingen?

    In the last 3 days, the lowest price for a flight from Washington, D.C. to Harlingen was $237 for a round-trip ticket.

  • Do I need a passport to fly between Washington, D.C. and Harlingen?

    A passport is not required to fly from Washington, D.C. to Harlingen.

  • Which airports will I be using when flying from Washington, D.C. to Harlingen?

    Washington, D.C. is served by 2 major airports and there is only 1 main airport in Harlingen. You will leave Washington, D.C. from one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. You will be arriving at Harlingen Valley Intl.

  • Which aircraft models fly most regularly from Washington, D.C. to Harlingen?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Washington, D.C. to Harlingen?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Washington, D.C. and Harlingen, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Washington, D.C. to Harlingen, Southwest or American Airlines?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Harlingen are Southwest and American Airlines. With an average price for the route of $428 and an overall rating of 8.0, Southwest is the most popular choice. American Airlines is also a great choice for the route, with an average price of $409 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from Washington, D.C. to Harlingen?

    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 Washington, D.C. to Harlingen.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Harlingen?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Harlingen from Washington, D.C. 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 Washington, D.C. to Harlingen?

    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 to Harlingen with an airline and back to Washington, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Harlingen?

    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 to Harlingen from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top airlines flying from Washington, D.C. to Harlingen

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Harlingen. 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 Washington, D.C. to Harlingen? 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.
8.0
SouthwestOverall score based on 4287 reviews
7.1Food
8.0Comfort
7.6Entertainment
8.2Boarding
8.6Crew
Airline reviews

Southwest is typically delayed, and it gets wearisome. It is no longer a discount airline and you get way less than you pay for when it comes to comfort and Ce.

6.0 GoodDavid, Jun 2025BWI - COS
Read more Southwest reviews

Southwest is typically delayed, and it gets wearisome. It is no longer a discount airline and you get way less than you pay for when it comes to comfort and Ce.

Multiple delays and gate changes. Arrived at final destination 6 hours late. All rental cars had been taken.

The movies using Southwest WiFi kept pausing and I had to restart multiple times.

First, my flight was a usual flight nothing exceptional or unexpected. Over all it was a normal, good flight! Second, your questionaire is wholly lacking in the proper options to which one can answer a question. Often on short flights, there is no food let alone entertainment so why isn't that reflected in your questionaire? A simple "not applicable" would cover that issue appropriately but no, your form arbitrarily enters an answer based on the initial assessment which normally isn't factual. Until you provide an accurate means of assessing flights, I'll no longer be completing of these unimpressive and misleading assessements. Thank you!

Easy to book and to get check in and get on and off.

First time I’ve ever missed a flight and it was an international flight.. Southwest put me on the next flight and it was the best experience possible.

It seems as though the provisions are even less. Although SWA used to be an economy Airline, that isn't really the case anymore. I paid over $700. for a round trip to Denver and I could have flown just about any airline for the price. The drinks are now in a 6-ounce cup and with ice I'm sure a can would fill more than 2 cups. However, I am very proud of SWA for using paper rather than continuing to contribute to the millions of plastic cups being used each day. I've thought of this fr many years and am so glad to see it come to fruition, if not by only SWA so far.

Service was great, boarding and exiting went smoothly, and the flight was very pleasant.

Southwest is amazing. The only issues I would have to say is. I don't like the unassigned seating, and the fact that the flight is completely sold out. It makes for a very tight fit. Other than that. Crew was great fun professional and attentive.

Everything worked well. Crew was as entertaining as is possible on a plane flight. Southwest still has good legroom:

Plane, flight, crew, captain were all great. The first flight had a Chipotle box lunch...delicious.

Plane, flight, crew, captain were all great. The first flight had a Chipotle box lunch...delicious. this return flight not as tasty, but filling.

So awful Unreliable Unfriendly Bad Mad Mean Smelly Hot Late Overbooked Understaffed Expensive Cramped Narcs If they were a fruit they’d be rotten durian

It’s a great flight. Service is good. Staff is awesome.

Boarding on time and fight was early but they didn't let us off the plane on time so we missed our connecting flight to Japan.

DFW-LHR Toilets not kept clean Too cramped. Aisles so narrow crew were constantly banging into people on the aisle seats. Even then, the carts used are reduced width. Other than that it was a decent flight on both legs

Eventless. It was a good flight and good crew. Can’t complaint.

Update.us on flight information in a more timely manner. Don’t say we are boarding on time ten minutes before the boarding time when the aircraft isn’t arriving for another forty minutes.

Pitch was very small. Knees were on the seat back in front of me.

Several delays. Next flight was worse. Did not arrive home until 2am PT

Everything you need to know for your flight from Washington, D.C. to Harlingen

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