Cheap flights from Philadelphia International to Monrovia Roberts

Compare Philadelphia International to Monrovia Roberts flight deals

Find the cheapest month or even day of the year to fly to Monrovia Roberts

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Flight deals from Philadelphia International to Monrovia Roberts

Looking for a cheap last-minute deal or the best return flight from Philadelphia International Airport to Monrovia Roberts Airport? If you want to travel next month, return fares start from $5,448. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Philadelphia International to Monrovia Roberts

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Philadelphia International to Monrovia Roberts flights are currently cheapest in November.

Philadelphia International to Monrovia Roberts: Alternative routes

Compare routes from Philadelphia International to Monrovia below. You may find an airport to fly into that's cheaper, faster, or easier than Monrovia Roberts.

Philadelphia to Monrovia: Flight information

The things to know before you go.
Cheapest flight found$806
Cheapest month to flyNovember

Finding cheap flights from Philadelphia International to Monrovia Roberts: Frequently asked questions

The best price we found for a return flight from Philadelphia International to Monrovia Roberts is $1,668. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Philadelphia International to Monrovia Roberts. But we found flights with one or more stops from $1,668.
As of May 2026, there are no flights flying from Philadelphia International to Monrovia Roberts.
The cheapest month to fly from Philadelphia International to Monrovia Roberts is usually November.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Philadelphia International Airport to Monrovia Roberts Airport on Sunday, 1 November 2026.
No airlines currently offer direct flights between Philadelphia International Airport and Monrovia Roberts Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Monrovia Roberts but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Monrovia is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Qatar Airways offers the cheapest flight tickets to Monrovia Roberts.

Flying from Philadelphia International Airport (PHL) to Roberts International Airport (ROB): what you need to know

  • Monrovia's timezone is UTC+0, which makes Monrovia four hours ahead of Philadelphia.

  • For a stress-free journey, turn up at the airport two hours ahead of international flights and one hour before domestic departures. This way, you'll have plenty of time to board your PHL to ROB flight.

  • Flying during a peak month like August? Major public holidays and other popular periods can result in longer lines at airport checkpoints. Play it safe and get there up to four hours ahead of international flights and two hours before a domestic departure.

How to find the cheapest flights from Philadelphia International Airport (PHL) to Roberts International Airport (ROB)

  • $806 is the lowest price for a one-way Philadelphia International Airport to Roberts International Airport flight. Return flights start at $1,668. These prices may change based on availability and demand.

  • To find cheap tickets from PHL to ROB, book as early as you can. Airlines tend to offer lower prices when flights are first made available.

  • Getting cheap flights from Philadelphia International Airport to Roberts International Airport is easy if you can be flexible with your travel plans. Use the 'Whole month' search tool to see the best prices across each month and land a great deal.

  • Spend less time searching for cheap flights from PHL to ROB by setting up a Price Alert. You'll get an email or push notification on the app when a special offer becomes available.

  • Select your preferred departure and arrival times, airlines and number of stops with the filters. Or sort your results by 'Cheapest' to find the best deals on flights from Philadelphia International Airport to Roberts International Airport.

Handy information about Philadelphia International Airport (PHL)

  • The address for PHL is Industrial Highway and Island Road.

  • 78.93% of flights departing from Philadelphia International Airport land at their destination on time.

  • Philadelphia International Airport is around 19 kilometres from central Philadelphia. If you're driving, ride-sharing or catching a cab from the centre, it'll take you 15 minutes or so to arrive, depending on the traffic.

  • Planning to catch public transport? Expect a trip time of around 45 minutes.

  • Need a handy hotel near PHL? If you're catching an early flight from Philadelphia International Airport to Roberts International Airport, these accommodation options will have you moments from your departure lounge:

Arriving at Roberts International Airport (ROB)

  • Arriving late on a Philadelphia International Airport to Roberts International Airport flight? Collect your bags and go straight to the comfort of a nearby hotel. Two good options close to ROB are The Farmington Hotel and Time Royal Ambassador Hotel.

Getting from Roberts International Airport (ROB) to central Monrovia

  • Roberts International Airport to the centre of Monrovia has a drive time of around 1 hour 30 minutes. It's approximately 56 kilometres away.

When to fly to Roberts International Airport (ROB)

  • June is the most popular month for flights from Philadelphia International Airport to Roberts International Airport. For smaller crowds, head to Monrovia in February.

  • Lock in your flight from Philadelphia International Airport to Roberts International Airport for January if you'd like to explore Monrovia during its warmest month. Expect temperatures of between 24ºC (75ºF) and 31ºC (88ºF).

  • For cooler conditions, look for a cheap ticket from PHL to ROB in August. Average temperatures are between 23ºC (73ºF) and 26ºC (79ºF) then.

Explore more of Liberia

  • Get more out of your Liberia getaway by venturing beyond Monrovia. Around 2 kilometres away to the north, Vai Town is another terrific city to add to your itinerary. Tick off some of its top sights like Chevron Park while you're there.

  • Another major destination in Liberia, Mataley is about 5 kilometres east of Monrovia. Set aside time for highlights including Matadi Central Mosque مسجد.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.