WAS - HRL

$270 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 1/12. 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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Everything you should know

Cheapest round-trip
$270
Southwest
Mon 1/12Tue 1/20
BWI - HRL • 1 stop
Cheapest one-way
$334
Southwest
Sun 12/21
BWI - HRL • 1 stop
Top airlines
Southwest
Cheapest • from $270 (round-trip)
Southwest
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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Flight Deals
Booking Insights
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

Mon, Jan 12 - Tue, Jan 20
Southwest Logo
12:30 pm - 5:05 pm
BWI
-
HRL
5h 35m1 stop
Southwest Logo
12:15 pm - 7:35 pm
HRL
-
BWI
6h 20m1 stop
$270Southwest
Mon, Jan 12 - Tue, Jan 20
Southwest Logo
12:30 pm - 5:05 pm
BWI
-
HRL
5h 35m1 stop
Southwest Logo
6:30 am - 4:25 pm
HRL
-
BWI
8h 55m2 stops
$275Southwest
Mon, Jan 12 - Tue, Jan 20
Southwest Logo
3:45 pm - 9:50 pm
BWI
-
HRL
7h 05m2 stops
Southwest Logo
6:30 am - 4:25 pm
HRL
-
BWI
8h 55m2 stops
$290Southwest
Sat, Jan 24 - Wed, Jan 28
United Airlines Logo
6:00 am - 11:26 am
DCA
-
HRL
6h 26m1 stop
United Airlines Logo
7:00 am - 1:43 pm
HRL
-
DCA
5h 43m1 stop
$331United Airlines
Sat, Jan 24 - Wed, Jan 28
United Airlines Logo
8:15 am - 4:06 pm
IAD
-
HRL
8h 51m1 stop
United Airlines Logo
12:10 pm - 8:49 pm
HRL
-
IAD
7h 39m1 stop
$331United Airlines
Sat, Jan 24 - Wed, Jan 28
United Airlines Logo
8:15 am - 4:06 pm
IAD
-
HRL
8h 51m1 stop
United Airlines Logo
12:10 pm - 7:30 am
HRL
-
IAD
18h 20m2 stops
$415United Airlines
Sat, Feb 14 - Wed, Feb 18
United Airlines Logo
6:07 am - 11:24 am
BWI
-
HRL
6h 17m1 stop
United Airlines Logo
9:20 am - 4:10 pm
HRL
-
BWI
5h 50m1 stop
$422United Airlines
Fri, Dec 26 - Mon, Dec 29
American Airlines Logo
2:59 pm - 10:48 pm
DCA
-
HRL
8h 49m1 stop
American Airlines Logo
10:12 am - 6:44 pm
HRL
-
DCA
7h 32m1 stop
$786American Airlines
Fri, Dec 26 - Mon, Dec 29
American Airlines Logo
6:05 am - 2:18 pm
IAD
-
HRL
9h 13m1 stop
American Airlines Logo
2:48 pm - 10:33 pm
HRL
-
IAD
6h 45m1 stop
$980American Airlines
Fri, Dec 26 - Mon, Dec 29
Delta Logo
6:00 am - 2:20 pm
DCA
-
HRL
9h 20m2 stops
Delta Logo
3:15 pm - 11:57 pm
HRL
-
DCA
7h 42m1 stop
$3,348Delta
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$270
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 $334 for a one-way ticket and $270 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.
7.9
SouthwestOverall score based on 4250 reviews
7.5Entertainment
8.1Boarding
7.0Food
8.0Comfort
8.6Crew
Airline reviews

They sent a notice that they were boarding an hour early. We had to leave the club and run to the gate. They said sorry, that came from corporate and was a mistake. They did not have enough seating because the flight before it had not taken off on time. They moved our gate and delayed it for an hour.

2.0 MediocreRobert, Dec 2025
LAS - TPA
Read more Southwest reviews

They sent a notice that they were boarding an hour early. We had to leave the club and run to the gate. They said sorry, that came from corporate and was a mistake. They did not have enough seating because the flight before it had not taken off on time. They moved our gate and delayed it for an hour.

No delays and arrived to destination 30 min early. Staff was super friendly.

Everything a cheap airline should be at normal airline rates.

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.

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!

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

Information on your arrival and departure airports