$423 Cheap Flights from Baltimore (BWI) to Rosario (ROS)

View $423 flight on Tue, Oct 21, 2025Opens in a new window

Popular airlines from Baltimore Washington Intl. Airport (BWI) to Rosario (ROS-Rosario - Islas Malvinas Intl.)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Baltimore to Rosario (BWI-ROS)

Prices were available within the past 7 days and start at $423 for one-way flights and $929 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

LATAM Airlines Group
Thu, Sep 11 - Wed, Sep 17
BWI
Baltimore
ROS
Rosario
$929 Roundtrip, found 1 day ago
$929
Roundtrip
found 1 day ago
Select LATAM Airlines Group flight, departing Thu, Sep 11 from Baltimore to Rosario, returning Wed, Sep 17, priced at $929 found 1 day ago
LATAM Airlines Group
Thu, Sep 11 - Wed, Sep 17
BWI
Baltimore
ROS
Rosario
$937 Roundtrip, found 1 day ago
$937
Roundtrip
found 1 day ago
Select LATAM Airlines Group flight, departing Thu, Sep 11 from Baltimore to Rosario, returning Wed, Sep 17, priced at $937 found 1 day ago
Copa
Sat, Aug 9 - Wed, Aug 13
BWI
Baltimore
ROS
Rosario
$940 Roundtrip, found 4 days ago
$940
Roundtrip
found 4 days ago
Select Copa flight, departing Sat, Aug 9 from Baltimore to Rosario, returning Wed, Aug 13, priced at $940 found 4 days ago
LATAM Airlines Group
Mon, Dec 8 - Wed, Dec 24
BWI
Baltimore
ROS
Rosario
$945 Roundtrip, found 6 days ago
$945
Roundtrip
found 6 days ago
Select LATAM Airlines Group flight, departing Mon, Dec 8 from Baltimore to Rosario, returning Wed, Dec 24, priced at $945 found 6 days ago
Copa
Sun, Aug 10 - Wed, Aug 13
BWI
Baltimore
ROS
Rosario
$990 Roundtrip, found 4 days ago
$990
Roundtrip
found 4 days ago
Select Copa flight, departing Sun, Aug 10 from Baltimore to Rosario, returning Wed, Aug 13, priced at $990 found 4 days ago
Copa
Sat, Aug 9 - Sat, Aug 16
BWI
Baltimore
ROS
Rosario
$1,020 Roundtrip, found 4 days ago
$1,020
Roundtrip
found 4 days ago
Select Copa flight, departing Sat, Aug 9 from Baltimore to Rosario, returning Sat, Aug 16, priced at $1,020 found 4 days ago
Copa
Sun, Aug 10 - Sat, Aug 16
BWI
Baltimore
ROS
Rosario
$1,070 Roundtrip, found 4 days ago
$1,070
Roundtrip
found 4 days ago
Select Copa flight, departing Sun, Aug 10 from Baltimore to Rosario, returning Sat, Aug 16, priced at $1,070 found 4 days ago
Copa
Wed, Aug 6 - Mon, Aug 11
BWI
Baltimore
ROS
Rosario
$1,071 Roundtrip, found 4 days ago
$1,071
Roundtrip
found 4 days ago
Select Copa flight, departing Wed, Aug 6 from Baltimore to Rosario, returning Mon, Aug 11, priced at $1,071 found 4 days ago
Copa
Wed, Aug 6 - Wed, Aug 13
BWI
Baltimore
ROS
Rosario
$1,106 Roundtrip, found 4 days ago
$1,106
Roundtrip
found 4 days ago
Select Copa flight, departing Wed, Aug 6 from Baltimore to Rosario, returning Wed, Aug 13, priced at $1,106 found 4 days ago
United
Fri, Dec 19 - Sun, Jan 4
BWI
Baltimore
ROS
Rosario
$3,551 Roundtrip, found 5 hours ago
$3,551
Roundtrip
found 5 hours ago
Select United flight, departing Fri, Dec 19 from Baltimore to Rosario, returning Sun, Jan 4, priced at $3,551 found 5 hours ago
Flights from Baltimore (BWI) to Rosario (ROS)
Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
Rosario - Islas Malvinas Intl.
Airlines serving
LATAM Airlines Group
Roundtrip price
$929
Distance
5084 mi

Baltimore to Rosario Flights

The cheapest times to fly from Baltimore to Rosario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Baltimore to Rosario are during the month of September. You can find some of the cheapest flights from Baltimore to Rosario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Baltimore to Rosario

Sunday is one of the best days to book for cheap flights from Baltimore to Rosario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Baltimore to Rosario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Baltimore to Rosario in 2025. You can also book with separate airlines for your outbound and return journeys, from $423 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Baltimore to Rosario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Baltimore to Rosario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Rosario - Islas Malvinas Intl. Airport (ROS) cost?
Discover the latest flight deals from BWI to ROS by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from BWI to ROS?
The cheapest flights from BWI to ROS are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from BWI to ROS?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from BWI to ROS. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Rosario - Islas Malvinas Intl. Airport (ROS)?
There aren't any daily direct flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Rosario - Islas Malvinas Intl. Airport (ROS). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be on your way in no time at all.
What day of the week has the most flights from BWI to ROS?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Rosario - Islas Malvinas Intl. Airport (ROS)?
To arrive at Rosario - Islas Malvinas Intl. Airport (ROS) on time, book a flight that takes off from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Rosario - Islas Malvinas Intl. Airport (ROS) last-minute?
Booking your ticket from BWI to ROS right before your journey is typically more expensive. However, if there's some wiggle room with your itinerary, you could grab a cheap last-minute fare.
Is it cheaper to book a BWI to ROS flight and hotel package?
Securing a BWI to ROS flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Select from our wide range of accommodations and then add activities, flights and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Rosario - Islas Malvinas Intl. Airport (ROS)?
If you booked your BWI to ROS flight within the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the ticket type you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more information.

Explore a world of travel with Expedia

*Available to One Key members.