$1,397+ 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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — ROS
Mar 8 — Mar 151
1 adult, Economy
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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
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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 March 3, 2025.
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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 March 3, 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 March 3, 2025.
This KAYAK deal was found by Cheapflights users on 3/2. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/42:22 amIAD - ROS
1 stop21h 02mCopa Airlines
Sat 7/191:29 amROS - IAD
1 stop14h 35mCopa Airlines
Deal found 3/2![Copa Airlines logo]()
$1,397
This KAYAK deal was found by Cheapflights users on 3/2. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/144:34 pmIAD - ROS
1 stop34h 19mMultiple Airlines
Thu 7/38:20 amROS - IAD
2 stops30h 40mMultiple Airlines
Deal found 3/2![Multiple Airlines logo]()
$1,503
This StudentUniverse deal was found by Cheapflights users on 3/2. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/146:00 amIAD - ROS
3 stops26h 00mLATAM Airlines
Sat 7/510:15 amROS - IAD
3 stops26h 45mLATAM Airlines
Deal found 3/2![LATAM Airlines logo]()
$2,276
Find flights from Dulles Intl to Rosario within your budget
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 March 3, 2025.
Fly from
Dulles Intl
Fly to
Rosario
Route
Depart
Return
Price
Washington, D.C.Rosario
IAD - ROS
IADROS
Washington, D.C. Dulles Intl
Fri 7/4
2:22 am-12:24 am
1 stop21h 02m
Rosario Fisherton
Sat 7/19
1:29 am-3:04 pm
1 stop14h 35m
$1,397
Washington, D.C.Rosario
IAD - ROS
IADROS
Washington, D.C. Dulles Intl
Sat 6/14
4:34 pm-3:53 am
1 stop34h 19m
Rosario Fisherton
Thu 7/3
8:20 am-2:00 pm
2 stops30h 40m
$1,503
Washington, D.C.Rosario
IAD - ROS
IADROS
Washington, D.C. Dulles Intl
Sat 6/14
6:00 am-9:00 am
3 stops26h 00m
Rosario Fisherton
Sat 7/5
10:15 am-12:00 pm
3 stops26h 45m
$2,276
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.
Travel insights for flights from Dulles Intl to Rosario
Get recent, data-driven insights about flights from Dulles Intl to Rosario including ideal travel times, pricing trends, and more.
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).