$335 Cheap Flights from Washington (DCA) to Rosario (ROS)

View $335 flight on Fri, Apr 10, 2026Opens in a new window

Popular airlines from Ronald Reagan Washington National Airport (DCA) to Rosario (ROS-Rosario - Islas Malvinas Intl.)

  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Washington to Rosario (DCA-ROS)

Prices were available within the past 7 days and start at $335 for one-way flights and $694 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Apr 13 - Tue, Apr 21
DCA
Washington
ROS
Rosario
$694 Roundtrip, found 1 day ago
$694
Roundtrip
found 1 day ago
Select United flight, departing Mon, Apr 13 from Washington to Rosario, returning Tue, Apr 21, priced at $694 found 1 day ago
United
Tue, Apr 7 - Tue, Apr 21
DCA
Washington
ROS
Rosario
$729 Roundtrip, found 1 day ago
$729
Roundtrip
found 1 day ago
Select United flight, departing Tue, Apr 7 from Washington to Rosario, returning Tue, Apr 21, priced at $729 found 1 day ago
United
Fri, Apr 10 - Sun, Apr 19
DCA
Washington
ROS
Rosario
$754 Roundtrip, found 1 day ago
$754
Roundtrip
found 1 day ago
Select United flight, departing Fri, Apr 10 from Washington to Rosario, returning Sun, Apr 19, priced at $754 found 1 day ago
American Airlines
Sun, Feb 22 - Wed, Mar 4
DCA
Washington
ROS
Rosario
$786 Roundtrip, found 3 days ago
$786
Roundtrip
found 3 days ago
Select American Airlines flight, departing Sun, Feb 22 from Washington to Rosario, returning Wed, Mar 4, priced at $786 found 3 days ago
American Airlines
Fri, Feb 27 - Wed, Mar 4
DCA
Washington
ROS
Rosario
$794 Roundtrip, found 3 days ago
$794
Roundtrip
found 3 days ago
Select American Airlines flight, departing Fri, Feb 27 from Washington to Rosario, returning Wed, Mar 4, priced at $794 found 3 days ago
Delta
Tue, Apr 7 - Wed, Apr 22
DCA
Washington
ROS
Rosario
$840 Roundtrip, found 1 day ago
$840
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Apr 7 from Washington to Rosario, returning Wed, Apr 22, priced at $840 found 1 day ago
JetBlue Airways
Tue, Jan 20 - Wed, Feb 25
DCA
Washington
ROS
Rosario
$855 Roundtrip, found 1 day ago
$855
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Tue, Jan 20 from Washington to Rosario, returning Wed, Feb 25, priced at $855 found 1 day ago
LATAM Airlines Group
Tue, Apr 7 - Mon, Apr 20
DCA
Washington
ROS
Rosario
$860 Roundtrip, found 1 day ago
$860
Roundtrip
found 1 day ago
Select LATAM Airlines Group flight, departing Tue, Apr 7 from Washington to Rosario, returning Mon, Apr 20, priced at $860 found 1 day ago
JetBlue Airways
Tue, Jan 20 - Wed, Feb 25
DCA
Washington
ROS
Rosario
$861 Roundtrip, found 1 day ago
$861
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Tue, Jan 20 from Washington to Rosario, returning Wed, Feb 25, priced at $861 found 1 day ago
JetBlue Airways
Tue, Jan 20 - Wed, Feb 25
DCA
Washington
ROS
Rosario
$862 Roundtrip, found 1 day ago
$862
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Tue, Jan 20 from Washington to Rosario, returning Wed, Feb 25, priced at $862 found 1 day ago
Flights from Washington (DCA) to Rosario (ROS)
Origin airport
Ronald Reagan Washington National
Destination airport
Rosario - Islas Malvinas Intl.
Airlines serving
GOL Linhas Aereas S.A., LATAM Airlines Group
Roundtrip price
$694
Distance
5066 mi

Washington to Rosario Flights

The cheapest times to fly from Washington to Rosario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Rosario are during the month of April. You can find some of the cheapest flights from Washington to Rosario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Rosario

Sunday is one of the best days to book for cheap flights from Washington to Rosario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Rosario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Rosario in 2026. You can also book with separate airlines for your outbound and return journeys, from $335 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Rosario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Rosario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Ronald Reagan Washington National Airport (DCA) to Rosario - Islas Malvinas Intl. Airport (ROS) cost?
Secure a cheap one-way flight from $335 or cheap return flight from $694 from Ronald Reagan Washington National Airport (DCA) to Rosario - Islas Malvinas Intl. Airport (ROS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Ronald Reagan Washington National Airport (DCA) to Rosario - Islas Malvinas Intl. Airport (ROS)?
Planning your getaway for April can help you save, as it's the cheapest month for flights between DCA and ROS. You'll usually find the lowest fares during off-peak months.
What is the cheapest airline that flies from Ronald Reagan Washington National Airport (DCA) to Rosario - Islas Malvinas Intl. Airport (ROS)?
Use the filters on Expedia to compare airlines and find the cheapest carrier that'll take you from DCA to ROS. Then, sort your results by "Price (lowest to highest)" to pick up a great deal.
How many flights per day from Ronald Reagan Washington National Airport (DCA) to Rosario - Islas Malvinas Intl. Airport (ROS)?
There aren't any daily nonstop flights departing from Ronald Reagan Washington National Airport (DCA) to Rosario - Islas Malvinas Intl. Airport (ROS). But you can choose flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from DCA to ROS?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can change based on various factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Ronald Reagan Washington National Airport (DCA) to Rosario - Islas Malvinas Intl. Airport (ROS)?
To reach Rosario - Islas Malvinas Intl. Airport (ROS) on time, select a flight that leaves from Ronald Reagan Washington National Airport (DCA) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Ronald Reagan Washington National Airport (DCA) to Rosario - Islas Malvinas Intl. Airport (ROS) last-minute?
Last-minute fares from DCA to ROS are typically more expensive. To lock in the best prices, start searching for flights early. That being said, if you can play around with your travel dates, it's possible to land a cheap fare right before your journey.
Is it cheaper to book a DCA to ROS flight and hotel package?
You can save money by booking a DCA to ROS flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. Once you've selected your preferred flights and accommodations, consider adding extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Ronald Reagan Washington National Airport (DCA) to Rosario - Islas Malvinas Intl. Airport (ROS)?
Typically, you can reschedule or cancel your DCA to ROS flight. However, additional fees may apply, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's policies and fees on flight changes, or if you want further details, head to our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.