$190 Find Cheap Flights from Harlingen to District of Columbia

This is the cheapest one-way 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 9/23. 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 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

Cheap Flights from Harlingen to District of Columbia

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

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

Fri, Dec 5 - Mon, Dec 8
American Airlines Logo
5:36 am - 11:59 amHRL-DCA
5h 23m1 stop
American Airlines Logo
6:30 am - 11:40 amDCA-HRL
6h 10m1 stop
$269American Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
Delta Logo
3:00 pm - 11:33 pmHRL-DCA
7h 33m1 stop
Delta Logo
7:40 am - 2:29 pmDCA-HRL
7h 49m1 stop
$319Delta
Find Deal
Fri, Dec 5 - Mon, Dec 8
American Airlines Logo
5:36 am - 2:23 pmHRL-DCA
7h 47m2 stops
American Airlines Logo
6:30 am - 11:40 amDCA-HRL
6h 10m1 stop
$339American Airlines
Find Deal
Fri, Dec 5 - Mon, Dec 8
United Airlines Logo
12:16 pm - 8:42 pmHRL-IAD
7h 26m1 stop
United Airlines Logo
6:00 am - 11:04 amIAD-HRL
6h 04m1 stop
$345United Airlines
Find Deal
Sat, Sep 27 - Sat, Oct 4
American Airlines Logo
6:35 pm - 1:00 amHRL-DCA
5h 25m1 stop
American Airlines Logo
5:00 am - 9:41 amDCA-HRL
5h 41m1 stop
$349American Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
United Airlines Logo
2:00 pm - 11:51 pmHRL-IAD
8h 51m1 stop
United Airlines Logo
8:25 am - 7:29 pmIAD-HRL
12h 04m1 stop
$375United Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
American Airlines Logo
12:10 pm - 9:07 pmHRL-DCA
7h 57m2 stops
American Airlines Logo
5:00 am - 11:35 amDCA-HRL
7h 35m1 stop
$394American Airlines
Find Deal
Sat, Sep 27 - Sat, Oct 4
United Airlines Logo
5:00 am - 11:38 amHRL-IAD
5h 38m1 stop
United Airlines Logo
12:50 pm - 7:41 pmIAD-HRL
7h 51m1 stop
$398United Airlines
Find Deal
Fri, Dec 5 - Mon, Dec 8
United Airlines Logo
12:16 pm - 8:42 pmHRL-IAD
7h 26m1 stop
United Airlines Logo
9:00 am - 9:54 pmIAD-HRL
13h 54m2 stops
$432United Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 11
Delta Logo
3:00 pm - 11:53 amHRL-IAD
19h 53m2 stops
Delta Logo
7:59 pm - 2:29 pmIAD-HRL
19h 30m2 stops
$476Delta
Find Deal
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’s the cheapest day of the week to fly from Harlingen to District of Columbia?

The average price of all round-trip flights from Harlingen to District of Columbia clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to District of Columbia on a Friday, as we generally find the cheapest rates on that day for this route. On the other hand, Wednesday is the most expensive day to fly from Harlingen to District of Columbia. For your return ticket, we recommend flying on a Thursday and avoiding Saturdays for the best deals.

Good to know

Low seasonFebruary
Cheapest flight$190
Best time to beat the crowds with an average 25% drop in price.
Most popular time to fly with an average 4% increase in price.
Flight from Harlingen to Reagan Washington National 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.

  • What is the cheapest time of day to fly to District of Columbia?

    The cheapest time of day to fly to District of Columbia is generally in the morning, when round-trip flights cost $381 on average. Morning departures are around 6% cheaper than evening flights, on average. The most expensive time of day to fly to District of Columbia is generally in the evening, which is peak travel time and where the average cost of a ticket is $407.

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 4242 reviews
8.1Boarding
8.6Crew
7.0Food
8.0Comfort
7.5Entertainment
Airline reviews

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

10.0 ExcellentG, Sep 2025LAS - ATL
Read more Southwest reviews

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

After being assaulted by a flight attendant I was then brushed off as oh well because he long braids didn’t mean to whip me in the eye. I have filed complaints and will see. But like any other issue I’ve had with kayak involved it’s been trash. Last time I’ll be using your app

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

Near 4 hour flight with only 1 service. Had to use call button to request water. Internet and power not working until into flight. Internet would stop working during flight.

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.

Flight crew and cabin crew were great. I had to rearrange flights because my original flight was 3hrs delayed for weather, the rub is the flight I moved to boarded on time then we sat at the gate for 2 hours because scheduling stole our first officer for another flight, TWICE. Then our actual FO was an hour delayed. To make it worse my original flight went from a 3 hour delay to departing 15min EARLY. Just poor scheduling operations all around.

Bring back peanuts Take our drink orders when were all seated, especially after you switch to assigned seating.

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

It is clear that someone knew, and competent, is in charge of food at United Airlines at least for the international flights. I was flying in coach, but the choices of the dinner were excellent. Tasty, and appropriate size. I had the beef, which was a little bit like a shepherds pie, and it was good. Nothing comparable has been served on a United flight in years. It will not be confused with three star food, but it is very good for airline food. Even better was the breakfast choice between a cinnamon roll and a breakfast sandwich. I chose the breakfast sandwich which was absolutely delicious and which I would happily order again at my local Starbucks or Panera. It is clear that someone knew indifferent is in charge of the food and it’s about time.

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

Overall it was good. I missed my connection but I was put on another flight.

The attendant were friendly. I suggest you have a medical attendant on board every flight so that in case someone is sick , he/she will help them.

Gate agent did not hold flight for connection, provided no assistance to get new flight

United airlines, mediocre at best. No issues , nothing great . Worked for me

Turbulent taking off & landing to Dulles from Raleigh. Flight from Dulles to Tokyo very good!!

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

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