Rosario

$917+ Cheap flights from Dulles Intl (IAD) to Rosario (ROS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/19. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — ROS
Aug 3 — Aug 101
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Rosario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Dulles Intl to Rosario

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Rosario (ROS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 29, 2025.

Round-trip from

$917
(LATAM Airlines)
From Washington, D.C. Dulles Intl to Rosario Fisherton

Find flight deals from Dulles Intl to Rosario

Cheapest flights from Dulles Intl to Rosario
Explore the most affordable flight options available from Dulles Intl to Rosario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

This LATAM Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1910:31 pmIAD - ROS
2 stops29h 34mMultiple Airlines
Fri 11/287:50 amROS - IAD
2 stops30h 00mMultiple Airlines
Deal found 7/28$917
This FlightHub deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/186:00 amIAD - ROS
2 stops22h 05mLATAM Airlines
Fri 11/287:50 amROS - IAD
2 stops30h 00mLATAM Airlines
Deal found 7/28$935
This Copa Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/181:13 amIAD - ROS
1 stop21h 08mCopa Airlines
Thu 11/271:21 amROS - IAD
1 stop14h 43mCopa Airlines
Deal found 7/28$3,027

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Rosario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Rosario that are best for you.

Fly from

Dulles Intl

Fly to

Rosario

Route

Depart

Return

Price

Washington, D.C.Rosario

IAD - ROS

IADROS

Washington, D.C. Dulles Intl

Wed 11/19

10:31 pm-6:05 am

2 stops29h 34m

Rosario Fisherton

Fri 11/28

7:50 am-11:50 am

2 stops30h 00m

$917

Washington, D.C.Rosario

IAD - ROS

IADROS

Washington, D.C. Dulles Intl

Tue 11/18

6:00 am-6:05 am

2 stops22h 05m

Rosario Fisherton

Fri 11/28

7:50 am-11:50 am

2 stops30h 00m

$935

Washington, D.C.Rosario

IAD - ROS

IADROS

Washington, D.C. Dulles Intl

Tue 11/18

1:13 am-12:21 am

1 stop21h 08m

Rosario Fisherton

Thu 11/27

1:21 am-2:04 pm

1 stop14h 43m

$3,027

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Best time to book a flight from Dulles Intl to Rosario

Have a flexible travel schedule? Discover the best time to fly to Rosario from Dulles Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing Rosario

Get insights into the airlines that provide service to Rosario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Rosario. Reviews last updated July 29, 2025.
Peruse reviews from past customers who have flown with LATAM Airlines and Copa Airlines from Washington, D.C. Dulles Intl Airport to Rosario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

7.6

Entertainment

7.0

Comfort

7.4

Crew

8.1

Food

6.7

Overall

7.5

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing

Boarding

7.6

Entertainment

7.0

Comfort

7.4

Crew

8.1

Food

6.7

Overall

7.5

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing

Boarding

7.6

Entertainment

7.0

Comfort

7.4

Crew

8.1

Food

6.7

Overall

7.5

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Rosario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly into for flights to Rosario from Washington, D.C. Dulles Intl?

    Rosario Fisherton (ROS), located 6.6 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. Dulles Intl to Rosario. 0 airlines have flights to Fisherton from Washington, D.C. Dulles Intl on a regular basis. Booking flights from Washington, D.C. Dulles Intl to Rosario Fisherton should not be difficult; the airport handles an average of 0 inbound flights from Washington, D.C. Dulles Intl per day.

  • Can I find deals for flights from Dulles Intl to Rosario that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Rosario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Rosario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Rosario.

  • Can I find deals for business class flights from Dulles Intl to Rosario?

    Yes. Cheapflights offers flight deals from Dulles Intl to Rosario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.