Cheap flights from Washington, D.C. Dulles Intl Airport to Rosario from $1,514

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to Rosario departing on 2/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Rosario

Cheap round-trip flights

Copa Airlines Logo
1:18 am - 3:53 amIAD-ROS
24h 35m1 stop
Copa Airlines Logo
1:34 am - 3:15 amROS-IAD
27h 41m1 stop
$1,514Copa Airlines
Find Deal
Sat, Feb 7 - Mon, Feb 9
Copa Airlines Logo
1:18 am - 3:53 amIAD-ROS
24h 35m1 stop
Copa Airlines Logo
5:20 am - 11:32 pmROS-IAD
20h 12m1 stop
$1,543Copa Airlines
Find Deal
Sat, Feb 7 - Tue, Feb 10
Copa Airlines Logo
8:29 am - 3:53 amIAD-ROS
17h 24m1 stop
Copa Airlines Logo
1:34 am - 11:32 pmROS-IAD
23h 58m1 stop
$1,581Copa Airlines
Find Deal
Sun, Feb 8 - Mon, Feb 9
Copa Airlines Logo
8:29 am - 3:53 amIAD-ROS
17h 24m1 stop
Copa Airlines Logo
5:20 am - 3:15 amROS-IAD
23h 55m1 stop
$1,610Copa Airlines
Find Deal
Sun, Feb 8 - Tue, Feb 10
Copa Airlines Logo
1:18 am - 12:20 amIAD-ROS
21h 02m1 stop
Copa Airlines Logo
1:34 am - 11:32 pmROS-IAD
23h 58m1 stop
$1,681Copa Airlines
Find Deal
Sat, Feb 7 - Mon, Feb 9
Copa Airlines Logo
1:18 am - 12:20 amIAD-ROS
21h 02m1 stop
Copa Airlines Logo
5:20 am - 3:15 amROS-IAD
23h 55m1 stop
$1,710Copa Airlines
Find Deal
Sat, Feb 7 - Tue, Feb 10
Copa Airlines Logo
1:18 am - 12:20 amIAD-ROS
21h 02m1 stop
Copa Airlines Logo
1:34 am - 2:02 pmROS-IAD
14h 28m1 stop
$1,818Copa Airlines
Find Deal
Sat, Feb 7 - Mon, Feb 9

Copa Airlines flights from Washington, D.C. Dulles Intl Airport to Rosario

Our best Copa Airlines deals on Washington, D.C. Dulles Intl Airport to Rosario flight tickets
Copa Airlines
Feb 7
IAD1:18 amWashington, D.C. Dulles Intl
24h 35m
1 stop
ROS3:53 amRosario Fisherton
Feb 9
ROS1:34 amRosario Fisherton
27h 41m
1 stop
IAD3:15 amWashington, D.C. Dulles Intl
Copa Airlines
Feb 7
IAD1:18 amWashington, D.C. Dulles Intl
24h 35m
1 stop
ROS3:53 amRosario Fisherton
Feb 10
ROS5:20 amRosario Fisherton
20h 12m
1 stop
IAD11:32 pmWashington, D.C. Dulles Intl
Copa Airlines
Feb 8
IAD8:29 amWashington, D.C. Dulles Intl
17h 24m
1 stop
ROS3:53 amRosario Fisherton
Feb 9
ROS1:34 amRosario Fisherton
23h 58m
1 stop
IAD11:32 pmWashington, D.C. Dulles Intl

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport 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, momondo users made 832,500 searches. Data last updated August 28, 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

Fly to

Route

Depart

Return

Price

Washington, D.C.Rosario

IAD - ROS

IADROS

Washington, D.C. Dulles Intl

Sat 2/7

1:18 am-3:53 am

1 stop24h 35m

Rosario Fisherton

Mon 2/9

1:34 am-3:15 am

1 stop27h 41m

$1,514

Washington, D.C.Rosario

IAD - ROS

IADROS

Washington, D.C. Dulles Intl

Sat 2/7

1:18 am-3:53 am

1 stop24h 35m

Rosario Fisherton

Tue 2/10

5:20 am-11:32 pm

1 stop20h 12m

$1,543

Washington, D.C.Rosario

IAD - ROS

IADROS

Washington, D.C. Dulles Intl

Sun 2/8

8:29 am-3:53 am

1 stop17h 24m

Rosario Fisherton

Mon 2/9

1:34 am-11:32 pm

1 stop23h 58m

$1,581

Washington, D.C.Rosario

IAD - ROS

IADROS

Washington, D.C. Dulles Intl

Sun 2/8

8:29 am-3:53 am

1 stop17h 24m

Rosario Fisherton

Tue 2/10

5:20 am-3:15 am

1 stop23h 55m

$1,610

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

Mon 2/9

1:34 am-11:32 pm

1 stop23h 58m

$1,681

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

Tue 2/10

5:20 am-3:15 am

1 stop23h 55m

$1,710

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

Mon 2/9

1:34 am-2:02 pm

1 stop14h 28m

$1,818

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Rosario from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Rosario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Rosario?

The cheapest day to depart on your flight to Rosario is on a Thursday when prices can be found for as low as $1,119. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $1,765. These prices are subject to change though, so be sure to set up a Price Alert for flights to Rosario.

What is the cheapest time of day to depart on your flight to Rosario?

The cheapest time of day to fly to Rosario is in the morning when flights can be purchased for as low as $1,266. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,288 on average. Flights to Rosario from Washington, D.C. Dulles Intl Airport in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from Washington, D.C. Dulles Intl Airport to Rosario

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to Rosario according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Dulles Intl Airport to Rosario (IAD to ROS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Rosario

Direct flights

None
There are no direct flights from Washington, D.C. Dulles Intl Airport to Rosario. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Rosario.
  • How far is Washington, D.C. Dulles Intl to Rosario Fisherton by plane?

    The straight-line distance from Washington, D.C. Dulles Intl to Rosario Fisherton is 5079.7 mi. A reasonable flight in good conditions will take 17h 24m.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Rosario Fisherton Airport?

    Prices for flights from Washington, D.C. Dulles Intl Airport to Rosario Fisherton Airport were last updated today.

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Rosario Fisherton Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Rosario Fisherton Airport.

  • What documentation or ID do you need to fly to Rosario Fisherton Airport?

    The travel and health documents you'll need for your trip to Rosario Fisherton Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Rosario Fisherton Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Rosario?

Finding the right flight to Rosario from Washington, D.C. is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Rosario quick and easy, saving you time and money.

Can I find flights from Washington, D.C. to Rosario with flexible booking policies on momondo?

momondo does allow users to show only those flights to Rosario from Washington, D.C. which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Washington, D.C. to Rosario?

Once all potential Washington, D.C. to Rosario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Washington, D.C. to Rosario right now. Can momondo alert me if prices change?

Price alerts on flights to Rosario from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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