HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Monrovia

$824+ Cheap flights from Philadelphia (PHL) to Monrovia (ROB)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ROB
Aug 21 — Aug 281
Thu 8/21
Thu 8/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Philadelphia to Monrovia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Philadelphia to Monrovia

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Monrovia (ROB). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 16, 2025.

Round-trip from

$1,536
(Gurufare)

One-way from

$824
(Gurufare)

Popular in

October

Cheapest in

November

Average price

$1,606
From Philadelphia to Monrovia Roberts Intl
Search Deals
One-way flight from Philadelphia to Monrovia Roberts Intl
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($73 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($44 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

Find flight deals from Philadelphia to Monrovia

Cheapest flights from Philadelphia to Monrovia
Explore the most affordable flight options available from Philadelphia to Monrovia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2025.

This Gurufare deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/253:00 pmPHL - ROB
3 stops26h 15mBrussels Airlines
Sat 11/1510:45 pmROB - PHL
2 stops25h 20mBrussels Airlines
Deal found 8/15$1,536
This American Airlines deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/123:45 pmPHL - ROB
2 stops32h 25mAmerican Airlines
Fri 10/316:35 amROB - PHL
2 stops31h 04mAmerican Airlines
Deal found 8/15$1,561
This KAYAK deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/125:35 pmPHL - ROB
3 stops46h 15mBrussels Airlines
Fri 10/318:05 pmROB - PHL
3 stops25h 30mBrussels Airlines
Deal found 8/15$1,615
This Ovago deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/306:40 pmPHL - ROB
2 stops20h 05mBrussels Airlines
Fri 1/308:05 pmROB - PHL
3 stops27h 35mBrussels Airlines
Deal found 8/16$1,619
This Gurufare deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/226:10 pmPHL - ROB
3 stops22h 05mBrussels Airlines
Sun 3/2210:45 pmROB - PHL
2 stops46h 20mBrussels Airlines
Deal found 8/15$1,620
This Ovago deal was found by Cheapflights users on 8/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/38:00 pmPHL - ROB
2 stops27h 35mBritish Airways
Wed 3/255:35 amROB - PHL
2 stops39h 40mBritish Airways
Deal found 8/15$1,648

Cheapflights Fare Finder

 
Customize your flight search to find flights from Philadelphia to Monrovia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 16, 2025.
Use the filters below to find and compare flights from Philadelphia to Monrovia that are best for you.

Fly from

Philadelphia

Fly to

Monrovia

Route

Depart

Return

Price

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Sat 10/25

3:00 pm-9:15 pm

3 stops26h 15m

Monrovia Roberts Intl

Sat 11/15

10:45 pm-7:05 pm

2 stops25h 20m

$1,536

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Tue 2/3

2:37 pm-9:15 pm

3 stops25h 38m

Monrovia Roberts Intl

Wed 3/25

10:45 pm-6:40 pm

2 stops23h 55m

$1,548

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Fri 9/12

3:45 pm-4:10 am

2 stops32h 25m

Monrovia Roberts Intl

Fri 10/31

6:35 am-9:39 am

2 stops31h 04m

$1,561

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Sat 11/22

10:05 am-9:15 pm

3 stops30h 10m

Monrovia Roberts Intl

Sun 3/22

10:45 pm-1:51 pm

2 stops43h 06m

$1,615

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Fri 9/12

5:35 pm-7:50 pm

3 stops46h 15m

Monrovia Roberts Intl

Fri 10/31

8:05 pm-5:35 pm

3 stops25h 30m

$1,615

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Wed 2/4

4:56 pm-6:45 pm

2 stops44h 49m

Monrovia Roberts Intl

Sat 4/4

9:10 pm-12:32 am

2 stops31h 22m

$1,616

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Thu 10/30

6:40 pm-6:45 pm

2 stops20h 05m

Monrovia Roberts Intl

Fri 1/30

8:05 pm-6:40 pm

3 stops27h 35m

$1,619

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Sat 11/22

6:10 pm-9:15 pm

3 stops22h 05m

Monrovia Roberts Intl

Sun 3/22

10:45 pm-5:05 pm

2 stops46h 20m

$1,620

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Tue 11/25

3:00 pm-9:15 pm

3 stops25h 15m

$824

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Tue 12/9

9:11 pm-4:35 am

2 stops50h 24m

$903

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 18 results
1
2

Best time to book a flight from Philadelphia to Monrovia

Have a flexible travel schedule? Discover the best time to fly to Monrovia from Philadelphia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Philadelphia to Monrovia

What is the cheapest month to book a flight from Philadelphia to Monrovia?

Currently, September is the cheapest month in which you can book a flight from Philadelphia to Monrovia (average of $1,197). Flying from Philadelphia to Monrovia in May is currently the most expensive (average of $1,850). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PHL to ROB?

Find hourly flight availability from Philadelphia to Monrovia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 16, 2025.

A simple way to save on the total cost of your ticket is to fly from Philadelphia to Monrovia at noon. If you’re flexible enough to do this you can expect to save up to 17% on your trip compared to booking a flight in the evening.

Reviews of airlines servicing Monrovia

Get insights into the airlines that provide service to Monrovia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Monrovia. Reviews last updated August 16, 2025.
Read reviews from past customers who have flown United Airlines and Brussels Airlines from Philadelphia to Monrovia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,916 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Brussels Airlines
7.3
Good
349 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Monrovia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Philadelphia to Monrovia round-trip?

    Our cheapest airline available from Philadelphia to Monrovia is Brussels Airlines. Our recent data shows that you can find tickets from as low as $1,470 on this airline. An additional option worth looking into is United Airlines, starting at $1,589. You may be able to fly from Philadelphia to Monrovia for 13% less than the average price by searching for these airlines.

  • Can I find deals for flights from Philadelphia to Monrovia that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Monrovia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Monrovia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Monrovia.

  • Can I find deals for business class flights from Philadelphia to Monrovia?

    Yes. Cheapflights offers flight deals from Philadelphia to Monrovia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Philadelphia to Monrovia?

    Currently, September is the cheapest month in which you can book a flight from Philadelphia to Monrovia (average of $1,197). Flying from Philadelphia to Monrovia in May is currently the most expensive (average of $1,850). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Philadelphia to Monrovia

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Monrovia flights
Newark to Monrovia flights
Dulles Intl to Monrovia flights
LaGuardia to Monrovia flights
Reagan-National to Monrovia flights

Top 2 airlines flying from Philadelphia to Monrovia

Discover the top 2 airlines that operate flights from Philadelphia to Monrovia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Brussels AirlinesCheapest$1,470Average$1,586FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$1,589Average$1,753FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.