$329 Find Cheap Flights from Harlingen to District of Columbia - Compare and Save

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Harlingen to District of Columbia departing on 9/24. 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 District of Columbia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Harlingen to District of Columbia, 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 Harlingen to District of Columbia, as well as popular online travel agencies
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Book Cheap Harlingen to District of Columbia Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Harlingen to District of Columbia 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 Harlingen to District of Columbia

Thu, Sep 24 - Mon, Sep 28
United Airlines Logo
5:05 am - 11:28 am
HRL
-
IAD
5h 23m
1 stop
United Airlines Logo
6:15 am - 1:23 pm
IAD
-
HRL
8h 08m
1 stop
$329United Airlines
Thu, Sep 24 - Mon, Sep 28
United Airlines Logo
5:18 pm - 11:59 pm
HRL
-
DCA
5h 41m
1 stop
United Airlines Logo
12:57 pm - 7:44 pm
DCA
-
HRL
7h 47m
1 stop
$353United Airlines
Tue, Sep 1 - Wed, Sep 2
United Airlines Logo
7:15 am - 4:04 pm
HRL
-
DCA
7h 49m
1 stop
United Airlines Logo
10:58 am - 3:59 pm
DCA
-
HRL
6h 01m
1 stop
$362United Airlines
Mon, Jun 29 - Fri, Jul 3
United Airlines Logo
5:20 pm - 11:59 pm
HRL
-
DCA
5h 39m
1 stop
United Airlines Logo
2:55 pm - 7:49 pm
DCA
-
HRL
5h 54m
1 stop
$399United Airlines
Thu, Sep 24 - Mon, Sep 28
Southwest Logo
5:30 am - 2:50 pm
HRL
-
DCA
8h 20m
2 stops
Southwest Logo
12:55 pm - 5:15 pm
DCA
-
HRL
5h 20m
1 stop
$404Southwest
Fri, Jul 3 - Tue, Jul 7
Southwest Logo
10:40 am - 8:55 pm
HRL
-
DCA
9h 15m
1 stop
Southwest Logo
6:05 am - 12:05 pm
DCA
-
HRL
7h 00m
1 stop
$413Southwest
Fri, Jul 17 - Tue, Jul 21
United Airlines Logo
5:10 am - 11:56 am
HRL
-
DCA
5h 46m
1 stop
United Airlines Logo
2:55 pm - 7:49 pm
DCA
-
HRL
5h 54m
1 stop
$419United Airlines
Fri, Jul 10 - Fri, Jul 17
Southwest Logo
10:40 am - 5:30 pm
HRL
-
DCA
5h 50m
1 stop
Southwest Logo
6:10 pm - 11:45 pm
DCA
-
HRL
6h 35m
1 stop
$423Southwest
Fri, Jul 3 - Tue, Jul 7
Southwest Logo
1:00 pm - 10:40 pm
HRL
-
DCA
8h 40m
2 stops
Southwest Logo
6:05 am - 12:05 pm
DCA
-
HRL
7h 00m
1 stop
$427Southwest
Tue, Jul 7 - Mon, Aug 3
American Airlines Logo
10:45 am - 12:10 am
HRL
-
IAD
12h 25m
2 stops
American Airlines Logo
11:59 am - 7:34 pm
IAD
-
HRL
8h 35m
1 stop
$585American Airlines
Booking Insights

KAYAK's insights & trends for Harlingen to District of Columbia flights

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

What is the cheapest month to fly from Harlingen to District of Columbia?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Harlingen to District of Columbia, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Harlingen to District of Columbia is February, when tickets cost $0 (return) on average. On the other hand, the most expensive months are June and May, when the average cost of round-trip tickets is $412 and $393 respectively.

Good to know

Cheapest flight$329
Flight from Harlingen to Washington Dulles Airport

FAQs - booking District of Columbia flights

  • How does KAYAK find such low prices on flights from Harlingen to District of Columbia?

    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 Harlingen to District of Columbia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Harlingen to District of Columbia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Harlingen to District of Columbia 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 Harlingen to District of Columbia?

    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 from Harlingen to District of Columbia with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Harlingen to District of Columbia?

    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 from Harlingen to District of Columbia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Harlingen to District of Columbia

 
See real verified KAYAK customer reviews for airlines flying from Harlingen to District of Columbia. 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 Harlingen to District of Columbia? 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 4235 reviews
7.5Entertainment
8.6Crew
7.0Food
8.1Boarding
8.0Comfort
Airline reviews

Flight was delayed over 3 hours. Planes were dirty. Staff indifferent. And they serve vegan pretzels as snacks.

2.0 MediocreMatthew, Jun 2026
CVG - MDW
Read more Southwest reviews

Flight was delayed over 3 hours. Planes were dirty. Staff indifferent. And they serve vegan pretzels as snacks.

It was great. The gate staff were very helpful in Portland when my son forgot his rolling bag and had to go back to get it just in time to make it on the plane. We really appreciate that. Great job!

Airline is not very senior friendly. Flights are late, forcing us to run to the connecting flight. Food is awful. Wish they would go back to pretzels and peanuts. During flight, pressurization isn’t quite right and all of our ears get plugged. Everything is nickel and dime, charging for boarding, seat selection and legroom. While a screen at the desk in the gate area says check your roll on bag now for free due to space limitation, the employee at the desk will not check the bag without a $100 fee. Insane.

Kayak could’ve posted the correct gate number. Almost missed my flight.

Slow boarding, limited food and drink portions. Bad delays and turbulence

there were two flight attendants that were up front...that were the best! They get KUDOs for making my trip only fantastic. Tell them Jeff said that!

OKay. I sat in the back of the plane and it was really loud between babies and little kids, and adults who.like to talk a lot and loudly most of the flight.

Flight coming out of Buffalo was delayed, so we had to be rescheduled on another flight from Baltimore to Phoenix which means we had a long layover and got home 3.5 hours late. Shuttle to parking stopped at 10pm, so we had to pay for an Uber to the parking lot and got charged an extra day of parking since it was after midnight. Not the best experience. Long day!

Was fine, delayed and feels like southwest is always late

I don't know why flying out of Sarasota requires two plane changes.

The entertainment is a bit limited, it would be better if they added some games to play besides the movies and tv shows. But the seats are comfortable and the crew is polite

The pilot had to extend the flight time from san antonio to Houston to burn off fuel. This caused a lot of unnecessary stress since we had a tight connection to Aruba. And with no other flights going to Aruba we were worried about spending a night in Houston. We had to to run to our connection because of the flight crews mistake. Not happy.

Packed flight, which makes it tough on crew and boarding staff (and the customers of course). But this was great boarding, clear instructions, etc. Traveling on the weekends are always fraught with danger as you have families and less frequent flyers thus more confusion. But this flight went as planned.

Boarded early, left early, arrived 40 mins early! A win win for me!

MY FAMILY'S LUGGAGE WAS LOST FROM ROME TO BARI. I WAS THE ONLY ONE THAT RECEIVED MY LUGGAGE FROM ROME TO BARI. AFTER DEPLANING IN BARI, WE WASTED A LOT OF TIME AT BAG CLAIMS LOST AND FOUND REPORTING THE CLAIM AND PLEADING FOR THE BAGS TO BE DELIVERED THE NEXT DAY. WE WERE TOLD THAT IT TAKES 3 DAYS MINIMUM TO DELIVER. MY DAUGHTER AND MY GIRLFRIEND NEEDED THEIR PERSONAL THINGS AND WE WERE STAYING 3 HOURS AWAY FROM THE BARI AIRPORT. WE HAD TO DRIVE 3 HOURS TO THE AIRPORT TO COLLECT OUR LOST LUGGAGE THE NEXT DAY. WE ARE NOT HAPPY WITH THE EXPERIENCE

We had a delay, but thankfully I made it to my connection. Overall it went smooth

Our flight to Rome, Italy was cancelled the day of and we were never informed. We only found out because I was trying to get into my husbands account and called to get his account number. Had to pay more for worse seating on another airline.

We were a little disappointed to not be able to complete check in online without uploading pics of passports. Also we have KTN's and they weren't on our boarding passes when we got to security. Had to trek back to counter to have them fix.

Excellent service in Polaris class IAD to ZRH. Arrived rested and well fed after the overnight flight.

It's a short hop. My carryon was checked at the gate, I didn't have to drag it all over the airport. Excellent wheelchair assist.

Everything you need to know for your flight from Harlingen to District of Columbia

Information on your arrival and departure airports