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Monrovia

$786+ 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 2/14. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ROB
Feb 23 — Mar 21
Mon 2/23
Mon 3/2
1 adult, Economy
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Cheap 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 January 24, 2026.

This FlightHub deal was found by Cheapflights users on 1/23. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/87:45 pm
PHL
-
ROB
3 stops41h 05m
Multiple Airlines
Sun 3/297:30 am
ROB
-
PHL
3 stops53h 30m
Multiple Airlines
Deal found 1/23$1,379
This United Airlines deal was found by Cheapflights users on 1/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/108:00 am
PHL
-
ROB
3 stops33h 15m
United Airlines
Tue 3/1710:45 pm
ROB
-
PHL
2 stops24h 24m
United Airlines
Deal found 1/23$1,436
This United Airlines deal was found by Cheapflights users on 1/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/87:45 pm
PHL
-
ROB
3 stops45h 30m
United Airlines
Tue 3/1710:45 pm
ROB
-
PHL
2 stops24h 24m
United Airlines
Deal found 1/22$1,441
This FlightHub deal was found by Cheapflights users on 1/23. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/38:40 pm
PHL
-
ROB
2 stops41h 10m
Multiple Airlines
Sun 4/127:30 am
ROB
-
PHL
3 stops53h 30m
Multiple Airlines
Deal found 1/23$1,459
This United Airlines deal was found by Cheapflights users on 1/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/312:55 pm
PHL
-
ROB
3 stops24h 55m
United Airlines
Sun 4/129:10 pm
ROB
-
PHL
2 stops28h 22m
United Airlines
Deal found 1/23$1,485
This FlightHub deal was found by Cheapflights users on 1/23. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/18:40 pm
PHL
-
ROB
3 stops41h 10m
Multiple Airlines
Sun 4/127:30 am
ROB
-
PHL
3 stops53h 30m
Multiple Airlines
Deal found 1/23$1,490
This United Airlines deal was found by Cheapflights users on 1/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/910:10 am
PHL
-
ROB
3 stops30h 05m
United Airlines
Sun 3/299:10 pm
ROB
-
PHL
2 stops40h 40m
United Airlines
Deal found 1/23$1,491
This United Airlines deal was found by Cheapflights users on 1/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/87:45 pm
PHL
-
ROB
3 stops44h 30m
United Airlines
Sun 3/299:10 pm
ROB
-
PHL
2 stops40h 40m
United Airlines
Deal found 1/23$1,497
This United Airlines deal was found by Cheapflights users on 1/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/26:17 am
PHL
-
ROB
3 stops33h 33m
United Airlines
Sun 4/129:10 pm
ROB
-
PHL
2 stops31h 35m
United Airlines
Deal found 1/23$1,510
This United Airlines deal was found by Cheapflights users on 1/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/66:30 am
PHL
-
ROB
3 stops33h 45m
United Airlines
Sun 3/299:10 pm
ROB
-
PHL
2 stops45h 00m
United Airlines
Deal found 1/23$1,516
This KAYAK deal was found by Cheapflights users on 1/24. 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.
Sun 3/19:30 pm
PHL
-
ROB
3 stops47h 35m
British Airways
Sat 3/143:05 am
ROB
-
PHL
2 stops39h 30m
British Airways
Deal found 1/24$1,527

Find 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 January 24, 2026.

Most accurate provider

oojo
3 stars

Most trusted provider

oojo
3 stars

Round-trip from

$1,379
(FlightHub)

One-way from

$786
(FlightHub)
Provider with most accurate pricing for Philadelphia-Monrovia Roberts Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Monrovia Roberts Intl flights.
Search Deals
From Philadelphia to Monrovia Roberts Intl
Search Deals
One-way flight from Philadelphia to Monrovia Roberts Intl
Search Deals

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 January 24, 2026.
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

Tue 3/10

8:00 am-9:15 pm

3 stops33h 15m

Monrovia Roberts Intl

Tue 3/17

10:45 pm-7:09 pm

2 stops24h 24m

$1,436

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Sun 3/8

7:45 pm-9:15 pm

3 stops45h 30m

Monrovia Roberts Intl

Tue 3/17

10:45 pm-7:09 pm

2 stops24h 24m

$1,441

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Tue 3/31

2:55 pm-7:50 pm

3 stops24h 55m

Monrovia Roberts Intl

Sun 4/12

9:10 pm-9:32 pm

2 stops28h 22m

$1,485

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Wed 4/1

8:40 pm-5:50 pm

3 stops41h 10m

Monrovia Roberts Intl

Sun 4/12

7:30 am-9:00 am

3 stops53h 30m

$1,490

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Sun 2/8

7:45 pm-9:15 pm

3 stops44h 30m

Monrovia Roberts Intl

Sun 3/29

9:10 pm-9:50 am

2 stops40h 40m

$1,497

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Thu 4/2

6:17 am-7:50 pm

3 stops33h 33m

Monrovia Roberts Intl

Sun 4/12

9:10 pm-12:45 am

2 stops31h 35m

$1,510

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Sat 4/4

2:55 pm-7:50 pm

3 stops24h 55m

Monrovia Roberts Intl

Sun 4/12

9:10 pm-12:45 am

2 stops31h 35m

$1,510

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Sat 2/7

10:10 am-9:15 pm

3 stops30h 05m

Monrovia Roberts Intl

Sun 3/29

9:10 pm-9:50 am

2 stops40h 40m

$1,516

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Thu 3/5

3:30 pm-6:45 pm

2 stops22h 15m

Monrovia Roberts Intl

Fri 3/20

8:05 pm-5:05 pm

3 stops49h 00m

$1,529

PhiladelphiaMonrovia

PHL - ROB

PHLROB

Philadelphia

Wed 2/18

8:02 pm-6:45 pm

2 stops41h 43m

Monrovia Roberts Intl

Sun 2/22

10:45 pm-7:04 pm

2 stops25h 19m

$1,541

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/22

Showing 1-10 of 13 results
1
2

Compare providers for flights from Philadelphia to Monrovia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to Monrovia in January.
ProviderPrice AccuracyTrust Score*
OvagoPrice Accuracy2 starsTrust Score*2 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
ExpediaPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Philadelphia-Monrovia flights, users find the pricing of oojo to be most consistent on Cheapflights vs. oojo Users can find the same prices on Philadelphia-Monrovia flight deals on Cheapflights vs. oojo >95% of the time. Price accuracy is based on data collected from Philadelphia-Monrovia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-Monrovia flights, Cheapflights users trust oojo the most. oojo has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-Monrovia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 $874). Flying from Philadelphia to Monrovia in July is currently the most expensive (average of $1,268). 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.

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 January 24, 2026.
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
9,195 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,195 reviews
United Airlines
7.4
Good
9,195 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Brussels Airlines
7.2
Good
382 reviews
United Airlines
7.4
Good
9,195 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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.

  • How long is the flight from Philadelphia to Monrovia?

    For as low as $1,436, United Airlines can have you in Monrovia from Philadelphia in 33h 15m. The distance between Philadelphia and Monrovia is about 4614 mi.

  • 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 $1,428 on this airline. An additional option worth looking into is United Airlines, starting at $1,470.

  • 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 $874). Flying from Philadelphia to Monrovia in July is currently the most expensive (average of $1,268). 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

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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
Reagan-National to Monrovia flights
LaGuardia 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 January 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
Brussels AirlinesCheapest$1,428Average$1,633FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$1,470Average$1,753FlexibilityNo cancel feeOn-time69%

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