$793 Cheap Flights from Phoenix (PHX) to Rosario (ROS)

View $793 flight on Fri, Sep 12, 2025Opens in a new window

Popular airlines from Phoenix Sky Harbor Intl. Airport (PHX) to Rosario (ROS-Rosario - Islas Malvinas Intl.)

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Cheap Flights from Phoenix to Rosario (PHX-ROS)

Prices were available within the past 7 days and start at $793 for one-way flights and $923 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Fri, Sep 12 - Wed, Sep 24
PHX
Phoenix
ROS
Rosario
$923 Roundtrip, found 6 days ago
$923
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Fri, Sep 12 from Phoenix to Rosario, returning Wed, Sep 24, priced at $923 found 6 days ago
United
Wed, Sep 10 - Wed, Sep 17
PHX
Phoenix
ROS
Rosario
$1,079 Roundtrip, found 6 days ago
$1,079
Roundtrip
found 6 days ago
Select United flight, departing Wed, Sep 10 from Phoenix to Rosario, returning Wed, Sep 17, priced at $1,079 found 6 days ago
United
Sat, Sep 13 - Wed, Sep 17
PHX
Phoenix
ROS
Rosario
$1,087 Roundtrip, found 6 days ago
$1,087
Roundtrip
found 6 days ago
Select United flight, departing Sat, Sep 13 from Phoenix to Rosario, returning Wed, Sep 17, priced at $1,087 found 6 days ago
Alaska Airlines
Fri, Sep 12 - Thu, Sep 25
PHX
Phoenix
ROS
Rosario
$1,099 Roundtrip, found 6 days ago
$1,099
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Fri, Sep 12 from Phoenix to Rosario, returning Thu, Sep 25, priced at $1,099 found 6 days ago
United
Sat, Sep 13 - Wed, Sep 24
PHX
Phoenix
ROS
Rosario
$1,113 Roundtrip, found 6 days ago
$1,113
Roundtrip
found 6 days ago
Select United flight, departing Sat, Sep 13 from Phoenix to Rosario, returning Wed, Sep 24, priced at $1,113 found 6 days ago
Alaska Airlines
Fri, Sep 12 - Sun, Sep 21
PHX
Phoenix
ROS
Rosario
$1,123 Roundtrip, found 6 days ago
$1,123
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Fri, Sep 12 from Phoenix to Rosario, returning Sun, Sep 21, priced at $1,123 found 6 days ago
United
Fri, Sep 12 - Wed, Sep 17
PHX
Phoenix
ROS
Rosario
$1,133 Roundtrip, found 6 days ago
$1,133
Roundtrip
found 6 days ago
Select United flight, departing Fri, Sep 12 from Phoenix to Rosario, returning Wed, Sep 17, priced at $1,133 found 6 days ago
United
Wed, Sep 10 - Thu, Sep 18
PHX
Phoenix
ROS
Rosario
$1,188 Roundtrip, found 6 days ago
$1,188
Roundtrip
found 6 days ago
Select United flight, departing Wed, Sep 10 from Phoenix to Rosario, returning Thu, Sep 18, priced at $1,188 found 6 days ago
United
Tue, Sep 9 - Wed, Sep 17
PHX
Phoenix
ROS
Rosario
$1,191 Roundtrip, found 6 days ago
$1,191
Roundtrip
found 6 days ago
Select United flight, departing Tue, Sep 9 from Phoenix to Rosario, returning Wed, Sep 17, priced at $1,191 found 6 days ago
Copa
Sat, Sep 13 - Sat, Sep 27
PHX
Phoenix
ROS
Rosario
$1,228 Roundtrip, found 6 days ago
$1,228
Roundtrip
found 6 days ago
Select Copa flight, departing Sat, Sep 13 from Phoenix to Rosario, returning Sat, Sep 27, priced at $1,228 found 6 days ago
Flights from Phoenix (PHX) to Rosario (ROS)
Origin airport
Sky Harbor Intl.
Destination airport
Rosario - Islas Malvinas Intl.
Roundtrip price
$922
Distance
5665 mi

Phoenix to Rosario Flights

The cheapest times to fly from Phoenix 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 Phoenix to Rosario are during the month of September. You can find some of the cheapest flights from Phoenix to Rosario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Phoenix to Rosario

Sunday is one of the best days to book for cheap flights from Phoenix 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 Phoenix 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 Phoenix to Rosario in 2025. You can also book with separate airlines for your outbound and return journeys, from $793 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 Phoenix 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 Phoenix 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 Sky Harbor Intl. Airport (PHX) to Rosario - Islas Malvinas Intl. Airport (ROS) cost?
Discover the latest flight deals from PHX 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 PHX to ROS?
The cheapest flights from PHX 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 PHX to ROS?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from PHX to ROS. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Sky Harbor Intl. Airport (PHX) to Rosario - Islas Malvinas Intl. Airport (ROS)?
There aren't any daily nonstop flights from Sky Harbor Intl. Airport (PHX) to Rosario - Islas Malvinas Intl. Airport (ROS). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be soaring above the clouds in no time at all.
What day of the week has the most flights from PHX to ROS?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* However, this can change depending on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Sky Harbor Intl. Airport (PHX) to Rosario - Islas Malvinas Intl. Airport (ROS)?
Select a flight from Sky Harbor Intl. Airport (PHX) to Rosario - Islas Malvinas Intl. Airport (ROS) that takes off before 3 PM to reduce the likelihood of delays and cancellations. Departures later than this are on average 22% more likely to be canceled.**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 Sky Harbor Intl. Airport (PHX) to Rosario - Islas Malvinas Intl. Airport (ROS) last-minute?
Booking your plane ticket from PHX to ROS right before your trip is usually more expensive. But if you're flexible with your travel times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a PHX to ROS flight and hotel package?
Opting for a PHX to ROS flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Choose from our impressive range of accommodations and then add flights, activities and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Sky Harbor Intl. Airport (PHX) to Rosario - Islas Malvinas Intl. Airport (ROS)?
In most cases, you're able to reschedule or cancel your PHX to ROS flight. However, there may be additional fees, especially if you made your booking more than 24 hours ago. Double-check your itinerary for the airline's fees and policies on flight changes, or if you want further information, head to our Customer Service portal.

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*Available to One Key members.