WAS - HRL

$230 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 11/22. 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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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

Sat, Nov 22 - Thu, Nov 27
Southwest Logo
5:35 pm - 11:55 pmDCA-HRL
7h 20m1 stop
Southwest Logo
7:10 am - 2:55 pmHRL-DCA
6h 45m1 stop
$230Southwest
Find Deal
Sat, Nov 22 - Thu, Nov 27
Southwest Logo
4:35 pm - 11:55 pmDCA-HRL
8h 20m2 stops
Southwest Logo
7:10 am - 2:55 pmHRL-DCA
6h 45m1 stop
$235Southwest
Find Deal
Sat, Nov 22 - Thu, Nov 27
Southwest Logo
4:35 pm - 11:55 pmDCA-HRL
8h 20m2 stops
Southwest Logo
5:50 am - 2:55 pmHRL-DCA
8h 05m2 stops
$240Southwest
Find Deal
Wed, Oct 8 - Fri, Oct 17
American Airlines Logo
5:00 am - 9:38 amDCA-HRL
5h 38m1 stop
American Airlines Logo
6:20 pm - 12:59 amHRL-DCA
5h 39m1 stop
$260American Airlines
Find Deal
Sat, Nov 22 - Fri, Nov 28
Southwest Logo
5:35 pm - 11:55 pmDCA-HRL
7h 20m1 stop
Southwest Logo
5:45 am - 1:05 pmHRL-DCA
6h 20m2 stops
$265Southwest
Find Deal
Sun, Sep 28 - Tue, Sep 30
United Airlines Logo
6:00 am - 1:19 pmBWI-HRL
8h 19m1 stop
United Airlines Logo
2:05 pm - 10:58 pmHRL-BWI
7h 53m1 stop
$277United Airlines
Find Deal
Wed, Jan 7 - Tue, Mar 31
American Airlines Logo
6:30 am - 11:41 amIAD-HRL
6h 11m1 stop
American Airlines Logo
4:12 pm - 10:15 pmHRL-IAD
5h 03m1 stop
$280American Airlines
Find Deal
Sun, Sep 28 - Tue, Sep 30
United Airlines Logo
6:00 am - 1:19 pmBWI-HRL
8h 19m1 stop
United Airlines Logo
5:00 am - 2:08 pmHRL-BWI
8h 08m2 stops
$282United Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
Delta Logo
6:10 am - 2:29 pmDCA-HRL
9h 19m1 stop
Delta Logo
3:00 pm - 10:17 pmHRL-DCA
6h 17m1 stop
$294Delta
Find Deal
Wed, Oct 8 - Fri, Oct 17
Delta Logo
6:18 am - 2:43 pmIAD-HRL
9h 25m1 stop
Delta Logo
3:39 pm - 11:40 pmHRL-IAD
7h 01m1 stop
$345Delta
Find Deal

Everything you should know

Top airlines
Southwest
Cheapest • from $230 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$230
Southwest
Sat 11/22Thu 11/27
DCA - HRL • 1 stop
Cheapest one-way
Multiple Airlines
Tue 9/16
WAS - HRL • multi-stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Harlingen!
Booking Insights

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 Thursdays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Harlingen, Friday is the cheapest day to fly and Wednesday is the most expensive.

Good to know

Cheapest flight$230
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 $230 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, Star Alliance, and SkyTeam are the airline alliances operating flights between Washington, D.C. and Harlingen, with SkyTeam being the most commonly used for this route.

  • 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.

Reviews of the top airline 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 4242 reviews
7.5Entertainment
8.6Crew
8.1Boarding
7.0Food
8.0Comfort
Airline reviews

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

10.0 ExcellentG, Sep 2025LAS - ATL
Read more Southwest reviews

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

Was good. I miss the free 2 checked bags. That was part of what made Southwest special

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.

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

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