$1,532+ 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 12/22. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — ROS
Apr 27 — May 41
1 adult, Economy
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1. Tell us where you want to go
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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 April 22, 2025.
Most accurate provider | AranGrant 3 stars |
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Most trusted provider | AranGrant 3 stars |
Find flight deals from Dulles Intl to Rosario
Cheapest flights from Dulles Intl to RosarioExplore 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 April 22, 2025.
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 April 22, 2025.
This Ovago deal was found by Cheapflights users on 4/20. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2211:55 pmIAD - ROS
2 stops46h 26mMultiple Airlines
Wed 1/71:21 amROS - IAD
1 stop28h 01mMultiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$1,532
This FlightHub deal was found by Cheapflights users on 4/22. 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.
Fri 12/1912:30 pmIAD - ROS
2 stops39h 40mLATAM Airlines
Fri 1/27:30 amROS - IAD
2 stops35h 16mLATAM Airlines
Deal found 4/22![LATAM Airlines logo]()
$1,627
This Copa Airlines deal was found by Cheapflights users on 4/21. 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.
Mon 12/221:18 amIAD - ROS
1 stop21h 03mCopa Airlines
Mon 1/51:21 amROS - IAD
1 stop14h 50mCopa Airlines
Deal found 4/21![Copa Airlines logo]()
$2,120
This American Airlines deal was found by Cheapflights users on 4/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1911:30 amIAD - ROS
2 stops36h 35mAmerican Airlines
Thu 1/12:55 amROS - IAD
2 stops39h 18mAmerican Airlines
Deal found 4/22![American Airlines logo]()
$2,924
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.
Cheapflights Insights
Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Rosario
Rainfall in Rosario by month
Plan your trip to Rosario by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Rosario ranges from 1.2 - 5.9 inches per month. March is typically the wettest month, when rainfall can reach 5.9 in. July is typically the driest time to visit Rosario when rainfall is around 1.2 in.
Temperature in Rosario by month
Plan your trip to Rosario by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Rosario, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 50.0 F).