Rosario

$894+ 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 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — ROS
Feb 25 — Mar 41
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Cheap 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 January 26, 2026.

This LATAM Airlines deal was found by Cheapflights users on 1/25. 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.
Mon 9/286:00 am
IAD
-
ROS
2 stops32h 25m
LATAM Airlines
Fri 10/27:35 am
ROS
-
IAD
2 stops26h 35m
LATAM Airlines
Deal found 1/25$894
This Mytrip deal was found by Cheapflights users on 1/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/85:45 am
IAD
-
ROS
2 stops25h 50m
Multiple Airlines
Sun 3/810:30 pm
ROS
-
IAD
3 stops29h 10m
Multiple Airlines
Deal found 1/26$1,108
This Copa Airlines deal was found by Cheapflights users on 1/26. 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.
Sat 2/71:18 am
IAD
-
ROS
1 stop21h 02m
Copa Airlines
Sun 3/85:20 am
ROS
-
IAD
1 stop20h 12m
Copa Airlines
Deal found 1/26$1,109
This Copa Airlines deal was found by Cheapflights users on 1/24. 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.
Thu 2/58:29 am
IAD
-
ROS
1 stop17h 24m
Copa Airlines
Tue 2/241:34 am
ROS
-
IAD
1 stop14h 26m
Copa Airlines
Deal found 1/24$1,129
This Mytrip deal was found by Cheapflights users on 1/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/214:00 am
IAD
-
ROS
3 stops25h 10m
Multiple Airlines
Sun 4/59:40 pm
ROS
-
IAD
3 stops34h 47m
Multiple Airlines
Deal found 1/25$1,151
This LATAM Airlines deal was found by Cheapflights users on 1/24. 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.
Thu 2/510:08 am
IAD
-
ROS
2 stops18h 02m
LATAM Airlines
Wed 2/257:45 am
ROS
-
IAD
2 stops18h 36m
LATAM Airlines
Deal found 1/24$1,218
This Mytrip deal was found by Cheapflights users on 1/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/54:15 pm
IAD
-
ROS
3 stops25h 15m
Multiple Airlines
Wed 2/2510:00 pm
ROS
-
IAD
2 stops32h 25m
Multiple Airlines
Deal found 1/24$1,253

Find 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 January 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,108
(Mytrip)
Provider with most accurate pricing for Washington, D.C. (WAS)-Rosario Fisherton flight deals.
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Rosario Fisherton flights.
From Washington, D.C. Dulles Intl to Rosario Fisherton

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 January 26, 2026.
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

Sun 2/8

5:45 am-9:35 am

2 stops25h 50m

Rosario Fisherton

Sun 3/8

10:30 pm-2:40 am

3 stops29h 10m

$1,108

Washington, D.C.Rosario

IAD - ROS

IADROS

Washington, D.C. Dulles Intl

Sat 2/7

1:18 am-12:20 am

1 stop21h 02m

Rosario Fisherton

Sun 3/8

5:20 am-12:32 am

1 stop20h 12m

$1,109

Washington, D.C.Rosario

IAD - ROS

IADROS

Washington, D.C. Dulles Intl

Thu 2/5

8:29 am-3:53 am

1 stop17h 24m

Rosario Fisherton

Tue 2/24

1:34 am-2:00 pm

1 stop14h 26m

$1,129

Washington, D.C.Rosario

IAD - ROS

IADROS

Washington, D.C. Dulles Intl

Sat 3/21

4:00 am-6:10 am

3 stops25h 10m

Rosario Fisherton

Sun 4/5

9:40 pm-7:27 am

3 stops34h 47m

$1,151

Washington, D.C.Rosario

IAD - ROS

IADROS

Washington, D.C. Dulles Intl

Thu 2/5

10:08 am-6:10 am

2 stops18h 02m

Rosario Fisherton

Wed 2/25

7:45 am-12:21 am

2 stops18h 36m

$1,218

Washington, D.C.Rosario

IAD - ROS

IADROS

Washington, D.C. Dulles Intl

Thu 2/5

4:15 pm-7:30 pm

3 stops25h 15m

Rosario Fisherton

Wed 2/25

10:00 pm-4:25 am

2 stops32h 25m

$1,253

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

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.

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.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Rosario?

    Copa Airlines can get you from Washington, D.C. Dulles Intl Airport to Rosario in just under 21h 02m. Your travel time can differ by up to . The distance between Washington, D.C. Dulles Intl Airport and Rosario is about 5075 mi.

  • 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.

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