$324 Find Cheap Flights from Harlingen to District of Columbia

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 2/19. 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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Flight Deals

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, Feb 19 - Sun, Feb 22
American Airlines Logo
2:45 pm - 10:53 pm
HRL
-
IAD
7h 08m
1 stop
American Airlines Logo
6:00 am - 2:14 pm
IAD
-
HRL
9h 14m
1 stop
$324American Airlines
Tue, Feb 24 - Sat, Feb 28
United Airlines Logo
12:10 pm - 8:56 pm
HRL
-
DCA
7h 46m
1 stop
United Airlines Logo
3:59 pm - 9:59 pm
DCA
-
HRL
7h 00m
1 stop
$331United Airlines
Thu, Feb 19 - Sun, Feb 22
American Airlines Logo
2:45 pm - 10:53 pm
HRL
-
IAD
7h 08m
1 stop
American Airlines Logo
6:00 am - 2:14 pm
IAD
-
HRL
9h 14m
1 stop
$337American Airlines
Thu, Feb 26 - Sun, Mar 1
American Airlines Logo
2:45 pm - 10:53 pm
HRL
-
IAD
7h 08m
1 stop
American Airlines Logo
6:00 am - 2:14 pm
IAD
-
HRL
9h 14m
1 stop
$348American Airlines
Thu, Feb 26 - Sun, Mar 1
American Airlines Logo
2:45 pm - 10:53 pm
HRL
-
IAD
7h 08m
1 stop
American Airlines Logo
6:00 am - 2:14 pm
IAD
-
HRL
9h 14m
1 stop
$353American Airlines
Tue, Feb 24 - Sat, Feb 28
United Airlines Logo
9:20 am - 3:55 pm
HRL
-
DCA
5h 35m
1 stop
United Airlines Logo
3:59 pm - 9:59 pm
DCA
-
HRL
7h 00m
1 stop
$371United Airlines
Wed, Feb 11 - Sat, Feb 14
American Airlines Logo
3:22 pm - 11:00 pm
HRL
-
DCA
6h 38m
1 stop
American Airlines Logo
3:59 pm - 11:03 pm
DCA
-
HRL
8h 04m
1 stop
$374American Airlines
Thu, Feb 19 - Sun, Feb 22
American Airlines Logo
6:00 am - 4:16 pm
HRL
-
IAD
9h 16m
2 stops
American Airlines Logo
6:00 am - 2:14 pm
IAD
-
HRL
9h 14m
1 stop
$405American Airlines
Mon, Feb 9 - Tue, Feb 10
United Airlines Logo
12:10 pm - 8:49 pm
HRL
-
IAD
7h 39m
1 stop
United Airlines Logo
8:15 am - 4:06 pm
IAD
-
HRL
8h 51m
1 stop
$409United Airlines
Wed, Feb 11 - Sat, Feb 14
Southwest Logo
12:15 pm - 8:35 pm
HRL
-
DCA
7h 20m
2 stops
Southwest Logo
1:25 pm - 10:50 pm
DCA
-
HRL
10h 25m
2 stops
$454Southwest
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.

Which airlines provide the cheapest flights from Harlingen to District of Columbia?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Harlingen to District of Columbia were found on American Airlines ($324) and United Airlines ($331).

Good to know

Cheapest flight$324
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.
8.0
SouthwestOverall score based on 4273 reviews
7.5Entertainment
7.0Food
8.6Crew
8.1Boarding
8.0Comfort
Airline reviews

Flight attendants very hospitable and friendly. Pilot flew a smooth take off and landing.

10.0 ExcellentAnonymous, Feb 2026
MSY - PHX
Read more Southwest reviews

Flight attendants very hospitable and friendly. Pilot flew a smooth take off and landing.

Paid for premium extra leg room but the bin space for rows 1-3 had to go in rows 4-6 and 4-6 had to go to 7-9 because flight attendants have snacks and their luggage upfront. So we pay extra to have to fight thru traffic to get our bags. Only 2nd day of new seating so hope they fix this.

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled. No snack or drink on this flight.

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled.

The wifi on the plane is great. The only issue that I have is that I prefer an aisle seat and on my trips this week, I was either in the middle or window. If we can work to secure aisle seating, I will be thrilled. Nice trip.

All good except once again bags took an hour at Midway Airport Happens all the time. Ridiculous

Everything went smoothly and we even arrived a little bit early.

Great vacation. Can't wait till next year for another one.

Great flight but super high price. Glad it was a business trip and not personal

The flight crew was extremely rude and especially not helpful when our flight was delayed.

Unfortunately weather delayed our flight waiting for our plane to arrive and due to a little snow time was needed to deice the plane so departure was very delayed and I missed the connecting flight

The flight crew where really good. Better then the crew from BNE to SFO

Delayed, toilets did not flush, pilot parked to far away from Gate

Miserable. They moved my seat, but canceled the next leg of my flight. I resolved the issue at my transfer, but that resulted in lost luggage that has taken days off my schedule with no resolution. Worse, they fail to interface effectively with Lufthansa, forcing me to bounce between two equally useless help desks. The apps are unable to handle the situation, the bag dropped off the tracker, and while the call centers are polite, they do not provide written information to assist with cross-airline communication.

I like flying first class, and United has a nice one

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

The only downside was my cell phone charger wouldn’t work in the charging port but everyone else’s would work in them all. My cell phone cable works fine in my hotel room in Frankfurt.

Very thoughtful flight attendant offered me water immediately since I had run to make my connection.

One bag is incorrect and not acceptable for an international flight. The food was not just good. I won't fly with them again.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

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

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