$960 Cheap Flights from Philadelphia (PHL) to Monrovia (ROB)

View $960 flight on Wed, Apr 1, 2026Opens in a new window

Popular airlines from Philadelphia Intl. Airport (PHL) to Monrovia (ROB-Roberts Intl.)

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Cheap Flights from Philadelphia to Monrovia (PHL-ROB)

Prices were available within the past 7 days and start at $960 for one-way flights and $1,419 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Mon, Feb 2 - Tue, Feb 17
PHL
Philadelphia
ROB
Monrovia
$1,419 Roundtrip, found 6 hours ago
$1,419
Roundtrip
found 6 hours ago
Select Air Canada flight, departing Mon, Feb 2 from Philadelphia to Monrovia, returning Tue, Feb 17, priced at $1,419 found 6 hours ago
United
Tue, Feb 3 - Tue, Feb 17
PHL
Philadelphia
ROB
Monrovia
$1,424 Roundtrip, found 6 hours ago
$1,424
Roundtrip
found 6 hours ago
Select United flight, departing Tue, Feb 3 from Philadelphia to Monrovia, returning Tue, Feb 17, priced at $1,424 found 6 hours ago
Air Canada
Mon, Feb 2 - Tue, Feb 10
PHL
Philadelphia
ROB
Monrovia
$1,429 Roundtrip, found 6 hours ago
$1,429
Roundtrip
found 6 hours ago
Select Air Canada flight, departing Mon, Feb 2 from Philadelphia to Monrovia, returning Tue, Feb 10, priced at $1,429 found 6 hours ago
United
Tue, Feb 3 - Tue, Feb 10
PHL
Philadelphia
ROB
Monrovia
$1,434 Roundtrip, found 6 hours ago
$1,434
Roundtrip
found 6 hours ago
Select United flight, departing Tue, Feb 3 from Philadelphia to Monrovia, returning Tue, Feb 10, priced at $1,434 found 6 hours ago
United
Mon, Nov 17 - Wed, Dec 3
PHL
Philadelphia
ROB
Monrovia
$1,434 Roundtrip, found 17 hours ago
$1,434
Roundtrip
found 17 hours ago
Select United flight, departing Mon, Nov 17 from Philadelphia to Monrovia, returning Wed, Dec 3, priced at $1,434 found 17 hours ago
United
Sun, Nov 23 - Tue, Dec 2
PHL
Philadelphia
ROB
Monrovia
$1,435 Roundtrip, found 2 days ago
$1,435
Roundtrip
found 2 days ago
Select United flight, departing Sun, Nov 23 from Philadelphia to Monrovia, returning Tue, Dec 2, priced at $1,435 found 2 days ago
United
Sun, Feb 15 - Tue, Mar 3
PHL
Philadelphia
ROB
Monrovia
$1,436 Roundtrip, found 1 day ago
$1,436
Roundtrip
found 1 day ago
Select United flight, departing Sun, Feb 15 from Philadelphia to Monrovia, returning Tue, Mar 3, priced at $1,436 found 1 day ago
British Airways
Fri, Jan 30 - Sun, Mar 1
PHL
Philadelphia
ROB
Monrovia
$1,442 Roundtrip, found 23 hours ago
$1,442
Roundtrip
found 23 hours ago
Select British Airways flight, departing Fri, Jan 30 from Philadelphia to Monrovia, returning Sun, Mar 1, priced at $1,442 found 23 hours ago
Brussels Airlines
Tue, Nov 11 - Tue, Nov 18
PHL
Philadelphia
ROB
Monrovia
$1,484 Roundtrip, found 22 hours ago
$1,484
Roundtrip
found 22 hours ago
Select Brussels Airlines flight, departing Tue, Nov 11 from Philadelphia to Monrovia, returning Tue, Nov 18, priced at $1,484 found 22 hours ago
Ethiopian Airlines
Mon, Nov 10 - Thu, Nov 20
PHL
Philadelphia
ROB
Monrovia
$1,521 Roundtrip, found 6 days ago
$1,521
Roundtrip
found 6 days ago
Select Ethiopian Airlines flight, departing Mon, Nov 10 from Philadelphia to Monrovia, returning Thu, Nov 20, priced at $1,521 found 6 days ago

Alternative airports near Monrovia

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Roberts Intl. ROB. Cheapest option available. Average driving time to city center is 49 minutes. Flights from $1,709
ROB
Roberts Intl.
Cheapest
Average driving time to city center49 min
Flights from $1,709

Frequently asked questions

How much does a flight from Philadelphia Intl. Airport (PHL) to Roberts Intl. Airport (ROB) cost?
Secure a cheap one-way flight from $960 or cheap return flight from $1,419 from Philadelphia Intl. Airport (PHL) to Roberts Intl. Airport (ROB) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Philadelphia Intl. Airport (PHL) to Roberts Intl. Airport (ROB)?
Traveling in February can help you save, as it's the cheapest month for flights between PHL and ROB. You'll often find the lowest prices during the off-season.
What is the cheapest airline that flies from Philadelphia Intl. Airport (PHL) to Roberts Intl. Airport (ROB)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest PHL to ROB flight.
How many flights per day from Philadelphia Intl. Airport (PHL) to Roberts Intl. Airport (ROB)?
You'll have to hop on a flight with a layover when traveling from Philadelphia Intl. Airport (PHL) to Roberts Intl. Airport (ROB). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from PHL to ROB?
Typically you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can change depending on the airline, time of year 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 Philadelphia Intl. Airport (PHL) to Roberts Intl. Airport (ROB)?
To touch down at Roberts Intl. Airport (ROB) without delays, choose a flight that leaves from Philadelphia Intl. Airport (PHL) 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 Philadelphia Intl. Airport (PHL) to Roberts Intl. Airport (ROB) last-minute?
Last-minute fares from PHL to ROB are generally more expensive. To lock in the best rates, start searching for flights well ahead of time. That being said, if you can play around with your travel dates, it's possible to land a cheap ticket right before your trip.
Is it cheaper to book a PHL to ROB flight and hotel package?
You'll typically save money by securing a PHL to ROB flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. Once you've chosen your ideal accommodations and flights, consider adding extras including activities, car rentals and tours.
Can I cancel or change the date of my flight from Philadelphia Intl. Airport (PHL) to Roberts Intl. Airport (ROB)?
If you booked your PHL to ROB flight within the last 24 hours, you may be able to modify or cancel it without fees. 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, go to our Customer Service portal for more information.

Travel information

Origin airport
Philadelphia Intl.
Destination airport
Roberts Intl.
Airlines serving
Air Canada, American Airlines, British Airways, Brussels Airlines, United
Roundtrip price
$1,419
Distance
4617 mi

Book with confidence

Philadelphia to Monrovia Flights

The cheapest times to fly from Philadelphia to Monrovia

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

 

The best time to book a flight from Philadelphia to Monrovia

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

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 Philadelphia to Monrovia in 2025. You can also book with separate airlines for your outbound and return journeys, from $960 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 Philadelphia to Monrovia 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 Philadelphia to Monrovia 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.

 

Philadelphia to Monrovia Flights
*Available to One Key members.