WAS - HRL

$129 Find Cheap Flights from Washington, D.C. to Harlingen

This is the cheapest one-way 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 8/6. 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

Thu, Aug 21 - Sun, Aug 24
United Airlines Logo
6:00 am - 10:50 amBWI-HRL
5h 50m1 stop
United Airlines Logo
5:00 am - 12:00 pmHRL-BWI
6h 00m1 stop
$247United Airlines
Find Deal
Tue, Aug 19 - Tue, Aug 19
Southwest Logo
6:20 am - 11:45 amBWI-HRL
6h 25m1 stop
Southwest Logo
3:55 pm - 10:30 pmHRL-BWI
5h 35m1 stop
$267Southwest
Find Deal
Thu, Sep 18 - Mon, Sep 22
American Airlines Logo
6:30 am - 2:08 pmBWI-HRL
8h 38m1 stop
American Airlines Logo
5:45 am - 5:47 pmHRL-BWI
11h 02m2 stops
$273American Airlines
Find Deal
Thu, Aug 21 - Sun, Aug 24
United Airlines Logo
6:15 am - 4:02 pmBWI-HRL
10h 47m2 stops
United Airlines Logo
5:00 am - 12:00 pmHRL-BWI
6h 00m1 stop
$284United Airlines
Find Deal
Fri, Sep 5 - Sun, Sep 7
Southwest Logo
2:05 pm - 9:30 pmBWI-HRL
8h 25m1 stop
Southwest Logo
6:00 am - 11:50 amHRL-BWI
4h 50m1 stop
$293Southwest
Find Deal
Thu, Aug 14 - Thu, Aug 14
Southwest Logo
6:15 am - 11:20 amBWI-HRL
6h 05m1 stop
Southwest Logo
5:45 pm - 12:25 amHRL-BWI
5h 40m1 stop
$297Southwest
Find Deal
Thu, Aug 21 - Sun, Aug 24
United Airlines Logo
2:59 pm - 7:33 pmDCA-HRL
5h 34m1 stop
United Airlines Logo
5:00 am - 1:56 pmHRL-DCA
7h 56m1 stop
$297United Airlines
Find Deal
Tue, Aug 19 - Tue, Aug 19
Southwest Logo
6:20 am - 11:45 amBWI-HRL
6h 25m1 stop
Southwest Logo
2:10 pm - 9:55 pmHRL-BWI
6h 45m2 stops
$303Southwest
Find Deal
Thu, Sep 18 - Mon, Sep 22
American Airlines Logo
6:30 am - 2:08 pmBWI-HRL
8h 38m1 stop
American Airlines Logo
5:45 am - 12:42 pmHRL-BWI
5h 57m1 stop
$311American Airlines
Find Deal
Thu, Sep 18 - Mon, Sep 22
American Airlines Logo
6:30 am - 2:08 pmBWI-HRL
8h 38m1 stop
American Airlines Logo
5:45 am - 5:47 pmHRL-BWI
11h 02m2 stops
$334American Airlines
Find Deal
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 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
Cheapest flight$129
Best time to beat the crowds with an average 30% drop in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Baltimore 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 $129 for a one-way ticket and $247 for a round-trip.

  • 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?

    Star Alliance, oneworld, 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 4241 reviews
8.0Comfort
8.6Crew
8.1Boarding
7.0Food
7.5Entertainment
Airline reviews

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

2.0 MediocreAnonymous, Jul 2025AUS - RDU
Read more Southwest reviews

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

The quality of Southwest Airlines continues to degrade each time I fly with them. If it were not for the free luggage, I would probably choose another airline. Their prices are a little bit competitive, but way too high for the quality of the service. Southwest is not unique in this way. Domestic flight in the United States of America has continued to be a lower and lower quality product. Very sad when you compare the quality of domestic airlines to that of many international airlines around the world.

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

WiFi did not work. For as outrageous as these flights cost, when they’re advertised with certain services/ features they should be in working order

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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