Find cheap flights from Harlingen to Washington Dulles Airport from $356
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 Dulles Intl departing on 8/17. 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.
Round-trip
1 adult
Economy
0 bags
Thu 6/6
Thu 6/13
Search hundreds of travel sites at once for deals on flights to Washington Dulles Airport
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Harlingen to Washington, D.C., as well as popular online travel agencies
...and more
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Harlingen to Washington, D.C., as well as popular online travel agencies
In the last 7 days travelers have searched 43,707,506 times on KAYAK, and here is why:
Save 21% or moreCompare multiple travel sites with one search.
Filter your dealsChoose cabin class, free Wi-Fi and more.
Bundle and saveSave money when you bundle your flight + hotel.
Cheap flight deals from Harlingen to Dulles Intl (HRL-IAD)
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Harlingen to Dulles Intl 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 and deals for you by selecting your travel dates.
Flights from Harlingen to Dulles Intl - Travel Insights & Trends
Get data-powered insights and trends into flights from Harlingen to Dulles Intl 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 Washington Dulles Airport?
The average price of all flights from Harlingen, Texas to Washington, D.C. Dulles Intl Airport clicked on KAYAK for each day over the last 12 months.
When flying from Harlingen to Washington Dulles Airport, you should consider leaving on a Tuesday and avoid Fridays if you are looking for the best rates. For your return to Harlingen, you’ll find the best rates on Mondays and the most expensive ones on Fridays.
Which airlines provide the cheapest flights from Harlingen to Washington Dulles Airport?
The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 3 days, American Airlines offered the best one-way deal for that route, at $398. KAYAK users also found Harlingen to Washington Dulles Airport round-trip flights on American Airlines from $356 and on United Airlines from $388.
Flight from Harlingen to Washington Dulles Airport
When to book flights from Harlingen to Dulles Intl
Are your dates flexible? Find out the best times to travel from Harlingen to Dulles Intl 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 Harlingen to Washington Dulles Airport flights
What is the cheapest flight from Harlingen, Texas to Washington, D.C. Dulles Intl Airport?
In the last 3 days, the lowest price for a flight from Harlingen, Texas to Washington, D.C. Dulles Intl Airport was $398 for a one-way ticket and $356 for a round-trip.
Do I need a passport to fly between Harlingen and Washington Dulles Airport?
Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.
Which airports will I be using when flying from Harlingen to Washington Dulles Airport?
Harlingen airport is called Harlingen Valley Intl and the only airport in Washington Dulles Airport is Washington, D.C. Dulles Intl.
Which aircraft models fly most regularly from Harlingen to Washington Dulles Airport?
We unfortunately don’t have that data for this specific route.
Which airline alliances offer flights from Harlingen to Washington Dulles Airport?
oneworld, and Star Alliance are the airline alliances operating flights between Harlingen and Washington Dulles Airport, with oneworld being the most commonly used for this route.
How does KAYAK find such low prices on flights from Harlingen to Washington Dulles Airport?
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 Washington Dulles Airport.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Harlingen to Washington Dulles Airport?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from Harlingen 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 Washington Dulles Airport?
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 Washington Dulles Airport with an airline and back to Harlingen with another airline. Booking your flights between Harlingen and IAD can sometimes prove cheaper using this method.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Harlingen to Washington Dulles Airport?
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 Washington Dulles Airport from Harlingen up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.
See more FAQs
Book cheap flights from Harlingen to Washington, D.C.
Recent one-way flight deals
Only flying one-way? Below are some of the best one-way flight deals from Harlingen to Washington, D.C. found on KAYAK in the last 72 hours.
5/19Sun
2 stopsAmerican Airlines
10h 39mHRL-IAD
$398
5/19Sun
1 stopUnited Airlines
25h 15mHRL-IAD
$472
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Last minute flights from Harlingen to Dulles Intl
Last minute flight, train and bus deals
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Harlingen to Washington, D.C. that are departing in the next 10 days.