WAS - HRL

$145 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 4/7. 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 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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Flight 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

Wed, Feb 18 - Wed, Feb 25
United Airlines Logo
11:00 am - 4:04 pmDCA-HRL
6h 04m1 stop
United Airlines Logo
9:20 am - 3:55 pmHRL-DCA
5h 35m1 stop
$251United Airlines
Find Deal
Wed, Feb 18 - Wed, Feb 25
American Airlines Logo
3:55 pm - 10:51 pmDCA-HRL
7h 56m1 stop
American Airlines Logo
6:00 am - 4:25 pmHRL-DCA
9h 25m2 stops
$256American Airlines
Find Deal
Wed, Feb 18 - Thu, Feb 26
United Airlines Logo
12:50 pm - 7:58 pmIAD-HRL
8h 08m1 stop
United Airlines Logo
12:10 pm - 8:41 pmHRL-IAD
7h 31m1 stop
$264United Airlines
Find Deal
Tue, Apr 7 - Thu, Apr 9
Delta Logo
7:15 am - 2:29 pmBWI-HRL
8h 14m1 stop
Delta Logo
3:00 pm - 11:27 pmHRL-BWI
7h 27m1 stop
$289Delta
Find Deal
Tue, Apr 7 - Thu, Apr 9
Delta Logo
7:15 am - 2:29 pmBWI-HRL
8h 14m1 stop
Delta Logo
3:00 pm - 11:27 pmHRL-BWI
7h 27m1 stop
$314Delta
Find Deal
Wed, Feb 18 - Wed, Feb 25
Southwest Logo
10:35 am - 6:00 pmDCA-HRL
8h 25m2 stops
Southwest Logo
6:30 am - 2:15 pmHRL-DCA
6h 45m2 stops
$327Southwest
Find Deal
Mon, Apr 6 - Fri, Apr 10
Southwest Logo
4:25 pm - 12:05 amBWI-HRL
8h 40m2 stops
Southwest Logo
6:00 am - 3:40 pmHRL-BWI
8h 40m2 stops
$359Southwest
Find Deal
Fri, Nov 28 - Sun, Nov 30
Multiple Airlines Logo
5:35 am - 10:31 amBWI-HRL
29h 56m2 stops
Multiple Airlines Logo
3:04 pm - 10:05 amHRL-BWI
18h 01m1 stop
$705Multiple Airlines
Find Deal
Fri, Nov 28 - Sun, Nov 30
Sun Country Air Logo
11:38 am - 10:31 amBWI-HRL
23h 53m1 stop
Sun Country Air Logo
3:04 pm - 3:35 pmHRL-BWI
23h 31m1 stop
$712Sun Country Air
Find Deal
Fri, Dec 26 - Mon, Dec 29
Multiple Airlines Logo
9:34 am - 8:58 amBWI-HRL
24h 24m2 stops
Multiple Airlines Logo
11:13 am - 9:35 amHRL-BWI
21h 22m3 stops
$865Multiple Airlines
Find Deal

Everything you should know

Top airlines
United Airlines
Cheapest • from $251 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$251
United Airlines
Wed 2/18Wed 2/25
DCA - HRL • 1 stop
Cheapest one-way
$145
Delta
Tue 4/7
BWI - HRL • 1 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$145
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 $145 for a one-way ticket and $251 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.

  • 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 4243 reviews
8.1Boarding
7.0Food
8.6Crew
7.5Entertainment
8.0Comfort
Airline reviews

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

8.0 ExcellentGreg, Oct 2025OAK - BUR
Read more Southwest reviews

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Full cans of soda would be nice. A choice between two snacks would be appreciated.

Tried watching free movie and it kept freezing so I couldn’t finish.

All was good. I just had a hard time getting connected to the WiFi/internet during the flight

I was re-booked onto another flight because my original flight was delayed and I would have missed my connector. I ended up in the “C” group after paying extra to be in the “A “ group on the original flight. At least if you’re going to re-book people, re-book them into the same group.

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.

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

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