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.

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.

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).

What is the cheapest time of day to fly from IAD to ROS?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Dulles Intl Airport to Rosario as you normally would.

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.

$894+ Flights from Washington, D.C. Dulles Intl Airport to Rosario

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

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

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.

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

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

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

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

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

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

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

Best flights from Dulles Intl to Rosario
Discover carefully curated flight deals from Dulles Intl to Rosario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 26, 2026.

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

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

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

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

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

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

Last-minute flights from Dulles Intl to Rosario
Discover last-minute flight deals from Dulles Intl to Rosario. Data last updated January 26, 2026 and is based on user searches.

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

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

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

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

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

Find flight deals from Dulles Intl to Rosario

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.

Search Deals

Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Rosario Fisherton flights.

Search Deals

From Washington, D.C. Dulles Intl to Rosario Fisherton

Search Deals

Cheapflights Fare Finder

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

Fly to

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

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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Dulles Intl to Rosario

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.

$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.

Find cheap flights from Dulles Intl to Rosario with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap 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 January 26, 2026.

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.

Find flight deals from Dulles Intl to Rosario

Most accurate provider

Most trusted provider

Round-trip from

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Rosario that are best for you.

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.

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?

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

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

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

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

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.

Alternative routes for Dulles Intl to Rosario

See prices for flight routes from nearby airports that may be better suited for you.

100% Free

Book with Flexibility

Travel Smart

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.