What is the cheapest flight from Washington, D.C. to Rosario?

In the last 3 days, the lowest price for a flight from Washington, D.C. to Rosario was $937 for a round-trip ticket. Visit our flight page for the latest deals!>/a>

Do I need a passport to fly between Washington, D.C. and Rosario?

Yes Visit our flight page for the latest deals!>/a>

Which airports will I be using when flying from Washington, D.C. to Rosario?

Washington, D.C. is served by 2 major airports and there is only 1 main airport in Rosario. You will leave Washington, D.C. from one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. You will be arriving at Rosario Fisherton. Visit our flight page for the latest deals!>/a>

Which aircraft models fly most regularly from Washington, D.C. to Rosario?

We unfortunately don’t have that data for this specific route.

Which airline alliances offer flights from Washington, D.C. to Rosario?

Star Alliance is the only airline alliance operating flights between Washington, D.C. and Rosario.

How does KAYAK find such low prices on flights from Washington, D.C. to Rosario?

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 Washington, D.C. to Rosario. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Rosario?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Rosario from Washington, D.C. is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Washington, D.C. to Rosario?

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 Rosario with an airline and back to Washington, D.C. with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Rosario?

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 Rosario from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$937 CHEAP FLIGHTS from Washington, D.C. to Rosario (WAS - ROS)

WAS - ROS

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Cheap Flight Deals from Washington, D.C. to Rosario (WAS-ROS)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. to Rosario 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.

Round-trip

One-way

Recent round-trip flight deals from Washington, D.C. to Rosario

KAYAK's recommended round-trip deals from the most popular airlines that fly from Washington, D.C. to Rosario.

Discover the best prices for you by selecting your travel dates on KAYAK.

7:00 am - 9:45 amIAD-ROS

25h 45m2 stops

8:20 am - 2:00 pmROS-IAD

54h 40m2 stops

$937

Find Deal

Mon, Jul 14 - Thu, Jul 24

1:52 pm - 6:05 amBWI-ROS

39h 13m2 stops

7:30 am - 12:43 amROS-BWI

18h 13m2 stops

$947LATAM Airlines

Find Deal

Wed, Jul 9 - Sun, Jul 20

2:55 pm - 6:05 amDCA-ROS

38h 10m2 stops

7:30 am - 11:42 pmROS-DCA

17h 12m2 stops

$947LATAM Airlines

Find Deal

Wed, Jul 9 - Sun, Jul 20

12:40 pm - 6:05 amIAD-ROS

40h 25m2 stops

7:30 am - 12:02 pmROS-IAD

29h 32m2 stops

$958

Find Deal

Wed, Jul 9 - Sun, Jul 20

7:00 am - 9:45 amIAD-ROS

25h 45m2 stops

10:05 am - 2:00 pmROS-IAD

52h 55m3 stops

$1,102

Find Deal

Mon, Jul 14 - Thu, Jul 24

2:45 am - 12:14 amIAD-ROS

20h 29m1 stop

1:21 am - 3:04 pmROS-IAD

14h 43m1 stop

$1,288Copa Airlines

Find Deal

Sun, Jul 13 - Wed, Jul 23

7:00 am - 9:45 amIAD-ROS

25h 45m2 stops

1:21 am - 12:29 amROS-IAD

24h 08m1 stop

$1,322

Find Deal

Mon, Jul 14 - Wed, Jul 23

3:25 pm - 9:25 amIAD-ROS

17h 00m2 stops

1:21 am - 12:29 amROS-IAD

24h 08m1 stop

$1,356

Find Deal

Wed, Jul 9 - Sat, Jul 19

6:55 pm - 2:05 amDCA-ROS

30h 10m2 stops

3:00 am - 11:00 amROS-DCA

33h 00m2 stops

$1,507GOL

Find Deal

Wed, Jul 9 - Sat, Jul 19

2:45 am - 12:14 amIAD-ROS

20h 29m1 stop

1:21 am - 3:04 pmROS-IAD

14h 43m1 stop

$1,576Copa Airlines

Find Deal

Tue, Jul 8 - Sat, Jul 19

Useful Info

KAYAK's insights & trends for Washington, D.C. to Rosario flights

Get data-powered insights and trends into flights from Washington, D.C. to Rosario to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Washington, D.C. to Rosario?

In the past 3 days, the cheapest round-trip tickets from Washington, D.C. to Rosario were found on LATAM Airlines ($947) and Copa Airlines ($1,288).

Find deals

Cheapest flight	$937

Flight from Washington Dulles Airport to Rosario

When to book flights from Washington, D.C. to Rosario

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Rosario 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.

What is the cheapest flight from Washington, D.C. to Rosario?
In the last 3 days, the lowest price for a flight from Washington, D.C. to Rosario was $937 for a round-trip ticket.
Do I need a passport to fly between Washington, D.C. and Rosario?
Yes
Which airports will I be using when flying from Washington, D.C. to Rosario?
Washington, D.C. is served by 2 major airports and there is only 1 main airport in Rosario. You will leave Washington, D.C. from one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. You will be arriving at Rosario Fisherton.
Which aircraft models fly most regularly from Washington, D.C. to Rosario?
We unfortunately don’t have that data for this specific route.
Which airline alliances offer flights from Washington, D.C. to Rosario?
Star Alliance is the only airline alliance operating flights between Washington, D.C. and Rosario.
How does KAYAK find such low prices on flights from Washington, D.C. to Rosario?
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 Washington, D.C. to Rosario.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Rosario?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Rosario from Washington, D.C. 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 Washington, D.C. to Rosario?
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 Rosario with an airline and back to Washington, D.C. with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Rosario?
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 Rosario from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top airline flying from Washington, D.C. to Rosario

See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Rosario. 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 Washington, D.C. to Rosario? 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.

7.5

Copa AirlinesOverall score based on 1415 reviews

7.4Comfort

6.8Entertainment

6.8Food

7.8Boarding

8.1Crew

Airline reviews

My flight delayed and i misss the connection they send me to orlando no to tampa i have to pay a uber to my house

4.0 OkayAnonymous, Apr 2025BOG - PTY

Everything you need to know for your flight from Washington, D.C. to Rosario

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Rosario (ROS)

WAS - ROS

$937 Find Cheap Flights from Washington, D.C. to Rosario

KAYAK searches hundreds of travel sites at once for deals on flights to Rosario

Cheap Flight Deals from Washington, D.C. to Rosario (WAS-ROS)

Recent round-trip flight deals from Washington, D.C. to Rosario

Recent one-way flight deals from Washington, D.C. to Rosario

KAYAK's insights & trends for Washington, D.C. to Rosario flights

Get data-powered insights and trends into flights from Washington, D.C. to Rosario to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Washington, D.C. to Rosario?

In the past 3 days, the cheapest round-trip tickets from Washington, D.C. to Rosario were found on LATAM Airlines ($947) and Copa Airlines ($1,288).

Good to know

When to book flights from Washington, D.C. to Rosario

FAQs for booking flights from Washington, D.C. to Rosario

What is the cheapest flight from Washington, D.C. to Rosario?

In the last 3 days, the lowest price for a flight from Washington, D.C. to Rosario was $937 for a round-trip ticket.

Do I need a passport to fly between Washington, D.C. and Rosario?

Yes

Which airports will I be using when flying from Washington, D.C. to Rosario?

Washington, D.C. is served by 2 major airports and there is only 1 main airport in Rosario. You will leave Washington, D.C. from one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. You will be arriving at Rosario Fisherton.

Which aircraft models fly most regularly from Washington, D.C. to Rosario?

We unfortunately don’t have that data for this specific route.

Which airline alliances offer flights from Washington, D.C. to Rosario?

Star Alliance is the only airline alliance operating flights between Washington, D.C. and Rosario.

How does KAYAK find such low prices on flights from Washington, D.C. to Rosario?

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 Washington, D.C. to Rosario.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Rosario?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Rosario from Washington, D.C. 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 Washington, D.C. to Rosario?

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 Rosario with an airline and back to Washington, D.C. with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Rosario?

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 Rosario from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top airline flying from Washington, D.C. to Rosario

Everything you need to know for your flight from Washington, D.C. to Rosario

Information on your arrival and departure airports

Cabin class types available on flights from Washington, D.C. to Rosario

Complete your trip to Rosario with a hotel stay or car rental

Find direct flights to and from Washington, D.C. and Rosario

Flights to other popular destinations

Flights from domestic origins to Rosario

Choose which airport to fly into in Rosario