WAS - ROS

$375 Find Cheap Flights from Washington, D.C. to Rosario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Rosario departing on 9/20. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Rosario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Rosario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Rosario, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Washington, D.C. to Rosario (WAS-ROS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. to Rosario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Washington, D.C. to Rosario

Sat, Dec 13 - Sun, Dec 28
LATAM Airlines Logo
7:00 am - 6:05 amDCA-ROS
21h 05m2 stops
LATAM Airlines Logo
7:50 am - 8:57 pmROS-DCA
39h 07m2 stops
$1,301LATAM Airlines
Find Deal
Mon, Jul 21 - Fri, Jul 25
Copa Airlines Logo
2:22 am - 12:14 amIAD-ROS
20h 52m1 stop
Copa Airlines Logo
1:21 am - 3:04 pmROS-IAD
14h 43m1 stop
$1,318Copa Airlines
Find Deal
Tue, Jul 22 - Sat, Jul 26
 Logo
3:25 pm - 9:00 pmIAD-ROS
28h 35m3 stops
 Logo
4:45 pm - 5:35 amROS-IAD
37h 50m3 stops
$1,349
Find Deal
Mon, Jul 21 - Sat, Jul 26
 Logo
1:05 am - 6:05 amIAD-ROS
28h 00m3 stops
 Logo
4:45 pm - 5:35 amROS-IAD
37h 50m3 stops
$1,423
Find Deal
Sat, Dec 13 - Sun, Dec 28
 Logo
2:20 pm - 8:30 amIAD-ROS
40h 10m2 stops
 Logo
12:35 pm - 1:00 pmROS-IAD
50h 25m2 stops
$1,605
Find Deal
Sun, Dec 14 - Sun, Dec 28
 Logo
6:10 am - 7:20 pmIAD-ROS
35h 10m2 stops
 Logo
11:00 pm - 1:00 pmROS-IAD
40h 00m2 stops
$1,665
Find Deal
Tue, Jul 22 - Sat, Jul 26
 Logo
3:25 pm - 8:30 amIAD-ROS
16h 05m2 stops
 Logo
4:45 pm - 5:35 amROS-IAD
37h 50m3 stops
$1,696
Find Deal
Tue, Jul 22 - Sat, Jul 26
 Logo
3:25 pm - 8:30 amIAD-ROS
16h 05m2 stops
 Logo
8:25 pm - 5:35 amROS-IAD
34h 10m2 stops
$1,853
Find Deal
Fri, Dec 19 - Thu, Jan 1
American Airlines Logo
11:30 am - 2:05 amIAD-ROS
36h 35m2 stops
American Airlines Logo
2:55 am - 4:13 pmROS-IAD
39h 18m2 stops
$3,152American Airlines
Find Deal
Fri, Dec 19 - Thu, Jan 1
American Airlines Logo
11:30 am - 2:05 amIAD-ROS
36h 35m2 stops
American Airlines Logo
2:55 am - 4:13 pmROS-IAD
39h 18m2 stops
$4,031American Airlines
Find Deal
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KAYAK's insights & trends for Washington, D.C. to Rosario flights

Get data-powered insights and trends into flights from Washington, D.C. to Rosario to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Washington, D.C. to Rosario?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Washington, D.C. to Rosario were found on LATAM Airlines ($1,301) and Copa Airlines ($1,318).

Good to know

Cheapest flight$375
Flight from Baltimore to Rosario

When to book flights from Washington, D.C. to Rosario

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Rosario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Washington, D.C. to Rosario

  • What is the cheapest flight from Washington, D.C. to Rosario?

    In the last 3 days, the lowest price for a flight from Washington, D.C. to Rosario was $375 for a one-way ticket and $1,301 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Rosario?

    Yes

  • Which airports will I be using when flying from Washington, D.C. to Rosario?

    Washington, D.C. is served by 2 major airports and there is only 1 main airport in Rosario. You will leave Washington, D.C. from one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. You will be arriving at Rosario Fisherton.

  • Which aircraft models fly most regularly from Washington, D.C. to Rosario?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Washington, D.C. to Rosario?

    Star Alliance, and oneworld are the airline alliances operating flights between Washington, D.C. and Rosario, with oneworld being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Washington, D.C. to Rosario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington, D.C. to Rosario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Rosario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Rosario from Washington, D.C. is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington, D.C. to Rosario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Rosario with an airline and back to Washington, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Rosario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Rosario from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Washington, D.C. to Rosario

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Rosario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Washington, D.C. to Rosario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.5
Copa AirlinesOverall score based on 1465 reviews
8.1Crew
7.4Comfort
6.8Entertainment
7.8Boarding
6.8Food
Airline reviews

Seats not reclining, no vegetarian food option, no snacks. 7.5 hr flight should have been more comfortable. Luggage limits are unusually small. Will never fly Copa again and will tell friends and family to avoid this airline.

2.0 MediocreAnonymous, Jun 2025GIG - PTY
Read more Copa Airlines reviews

Seats not reclining, no vegetarian food option, no snacks. 7.5 hr flight should have been more comfortable. Luggage limits are unusually small. Will never fly Copa again and will tell friends and family to avoid this airline.

We had a five hour layover in the way home from Colombia. I read the "bout your flight" email carefully before we checked bags. We had to go through security right at the gate. Almost lost our ground coffee because that airport only allows 16 ounce of coffee and we had 18. I've been to 48 countries and never heard of a coffee restriction. I can't follow a rule I don't know about. I requested they bring our coffee to our checked luggage. Instead tey gate checked our bag for free. Back to planning transfers in Dallas I guess

It was ok. However, the food was quite poor since I don't eat pasta.

Tell people to remain in their seats during the meal/beverage distribution. Enforce boarding by group numbers. No one was checking. Tell people to turn their electronics speakers off. Bigger cups for drinks.

Enforce the boarding process by group numbers. Tell people to stay seated during the meal/drink distribution. It took forever to get food and drinks because people would not stay out the isle and let the crew do their jobs. Everyone wanted to go to the bathroom forcing the crew to enter and leave the isle constantly so people can pass. Tell people to keep their electronics off speaker mode. No one wants to hear phone conversations and music playing.

Placed us in the last rear row of the plane so could not recline seats because of the rear wall, and also made it more of a tight space when the passenger in front reclined their seat. While understand seat assignments, every passenger should be afforded a reclining seat. The odor control scent from the restrooms was overwhelming strong. My wife and I could not deal with it, and she suffered a terrible headache as a result. I kept getting hit by the crew since I was on the ilse seat. No apologies, nothing. They made me feel like I was supposed to take the beating for a 3 hr flight.

There was no individual at the front check in when I arrived. I waited for at least 15 minutes and walked around asking security/janitors if they could help and they did not have a solution. So I had to take my checked bag through security and they threw away some of my items. I ended up making it to the gate only a few minutes before it closed due to my waiting for an agent at check in.

We were in transit from Lima (flight at 1.10am) and we were in stand by in our flight from Panama to Washington. We wait from 4.30 am to 18.30pm in the Airport. The company give us 2 x 15 dollars for eat during the day and a personnal travel voucher of 400 dollars each. Do they buy food one time something in the Airport ??? And one of us live in France so the voucher is not usable. More than 24 hours travel !! And our place were near the toilets, with 8 children around us. The boy behind my seat stamped his feet on my back all the flight. Really Wonder full ! So we are totally unhappy with our travel. Thanks Copa Airlines....

It would have been better if they don't separate families in seating. We were seated in the aile row in the middle of a family of four. It would have been better if they they seat the family of four together than separated.

I upgraded myself to Business Class at the last minute so I had a DREAMS window seat. Seeing as I've never flown Business before everything was novel and fun for me and it made the 7 hour flight much more enjoyable for sure.

Everything you need to know for your flight from Washington, D.C. to Rosario

Information on your arrival and departure airports

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