$466 Cheap Flights from Sao Luis (SLZ) to Philadelphia (PHL)

View $466 flight on Wed, Oct 22, 2025Opens in a new window

Popular airlines from Sao Luis (SLZ-Marechal Cunha Machado Intl.) to Philadelphia Intl. Airport (PHL)

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Cheap Flights from Sao Luis to Philadelphia (SLZ-PHL)

Prices were available within the past 7 days and start at $466 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Flights from Sao Luis (SLZ) to Philadelphia (PHL)
Origin airport
Marechal Cunha Machado Intl.
Destination airport
Philadelphia Intl.
Distance
3529 mi

Sao Luis to Philadelphia Flights

The cheapest times to fly from Sao Luis to Philadelphia

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 Sao Luis to Philadelphia are during the month of . You can find some of the cheapest flights from Sao Luis to Philadelphia with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Sao Luis to Philadelphia

Sunday is one of the best days to book for cheap flights from Sao Luis to Philadelphia: 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 Sao Luis to Philadelphia

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 Sao Luis to Philadelphia in 2025. You can also book with separate airlines for your outbound and return journeys, from $466 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 Sao Luis to Philadelphia 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 Sao Luis to Philadelphia 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 Marechal Cunha Machado Intl. Airport (SLZ) to Philadelphia Intl. Airport (PHL) cost?
Discover the latest flight deals from SLZ to PHL 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 SLZ to PHL?
The cheapest flights from SLZ to PHL 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 SLZ to PHL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SLZ to PHL. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Marechal Cunha Machado Intl. Airport (SLZ) to Philadelphia Intl. Airport (PHL)?
There are no daily nonstop flights from Marechal Cunha Machado Intl. Airport (SLZ) to Philadelphia Intl. Airport (PHL). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be on your way before you know it.
What day of the week has the most flights from SLZ to PHL?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Marechal Cunha Machado Intl. Airport (SLZ) to Philadelphia Intl. Airport (PHL)?
To land at Philadelphia Intl. Airport (PHL) on schedule, book a flight that takes off from Marechal Cunha Machado Intl. Airport (SLZ) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Marechal Cunha Machado Intl. Airport (SLZ) to Philadelphia Intl. Airport (PHL) last-minute?
Last-minute fares from SLZ to PHL are typically more expensive. To lock in the best prices, start looking for flights well in advance. That said, if you can play around with your travel dates, you may find a cheap ticket just before your departure.
Is it cheaper to book a SLZ to PHL flight and hotel package?
You'll generally save money by booking a SLZ to PHL flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. After choosing your ideal flights and accommodations, consider adding extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Marechal Cunha Machado Intl. Airport (SLZ) to Philadelphia Intl. Airport (PHL)?
Generally, it's possible to cancel or reschedule your SLZ to PHL flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more information on our Customer Service portal.

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