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$1,557+ Cheap flights from Monrovia (ROB) to Philadelphia (PHL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/17. Fares are subject to change and may not be available on all flights or dates of travel.
ROB — PHL
Jan 10 — Jan 171
Sat 1/10
Sat 1/17
1 adult, Economy
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Cheap flight deals from Monrovia to Philadelphia

Cheapest flights from Monrovia to Philadelphia
Explore the most affordable flight options available from Monrovia to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 11, 2025.

This American Airlines deal was found by Cheapflights users on 12/10. 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.
Wed 12/175:35 amROB - PHL
3 stops33h 10mAmerican Airlines
Mon 1/56:55 pmPHL - ROB
3 stops28h 40mAmerican Airlines
Deal found 12/10$1,557
This American Airlines deal was found by Cheapflights users on 12/10. 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.
Wed 12/175:35 amROB - PHL
2 stops38h 59mMultiple Airlines
Mon 1/56:55 pmPHL - ROB
3 stops28h 40mMultiple Airlines
Deal found 12/10$1,564
This American Airlines deal was found by Cheapflights users on 12/11. 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.
Sun 12/215:35 amROB - PHL
2 stops39h 00mMultiple Airlines
Tue 1/67:40 pmPHL - ROB
2 stops51h 55mMultiple Airlines
Deal found 12/11$1,569
This United Airlines deal was found by Cheapflights users on 12/11. 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 12/2310:45 pmROB - PHL
2 stops29h 45mUnited Airlines
Mon 1/58:27 amPHL - ROB
3 stops31h 48mUnited Airlines
Deal found 12/11$1,648
This United Airlines deal was found by Cheapflights users on 12/10. 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 12/1610:45 pmROB - PHL
2 stops44h 26mUnited Airlines
Tue 1/206:30 amPHL - ROB
3 stops33h 45mUnited Airlines
Deal found 12/10$1,699
This United Airlines deal was found by Cheapflights users on 12/11. 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 12/2110:45 pmROB - PHL
2 stops31h 00mUnited Airlines
Mon 1/510:39 amPHL - ROB
3 stops29h 36mUnited Airlines
Deal found 12/11$1,708
This United Airlines deal was found by Cheapflights users on 12/11. 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 12/2110:45 pmROB - PHL
2 stops40h 10mUnited Airlines
Thu 1/85:00 pmPHL - ROB
3 stops47h 15mUnited Airlines
Deal found 12/11$1,774
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Sat 12/2010:45 pmROB - PHL
2 stops31h 00mUnited Airlines
Mon 1/510:39 amPHL - ROB
3 stops29h 36mUnited Airlines
Deal found 12/11$1,858
This United Airlines deal was found by Cheapflights users on 12/11. 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 12/2310:45 pmROB - PHL
2 stops23h 43mUnited Airlines
Tue 1/61:10 pmPHL - ROB
3 stops27h 05mUnited Airlines
Deal found 12/11$1,893
This United Airlines deal was found by Cheapflights users on 12/11. 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 12/2310:45 pmROB - PHL
2 stops40h 10mUnited Airlines
Sun 1/46:34 pmPHL - ROB
3 stops45h 41mUnited Airlines
Deal found 12/11$1,908
This United Airlines deal was found by Cheapflights users on 12/11. 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 12/198:05 pmROB - PHL
3 stops42h 50mUnited Airlines
Thu 1/85:00 pmPHL - ROB
3 stops47h 15mUnited Airlines
Deal found 12/11$1,944

Find flight deals from Monrovia to Philadelphia

Discover tips and strategies to find the most affordable flight options for your journey from Monrovia (ROB) to Philadelphia (PHL). 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 December 11, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$1,564
(Ovago)
Provider with most accurate pricing for Monrovia Roberts Intl-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Monrovia Roberts Intl-Philadelphia flights.
Search Deals
From Monrovia Roberts Intl to Philadelphia
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Monrovia to Philadelphia 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 December 11, 2025.
Use the filters below to find and compare flights from Monrovia to Philadelphia that are best for you.

Fly from

Monrovia

Fly to

Philadelphia

Route

Depart

Return

Price

MonroviaPhiladelphia

ROB - PHL

ROBPHL

Monrovia Roberts Intl

Sun 12/21

5:35 am-3:35 pm

2 stops39h 00m

Philadelphia

Tue 1/6

9:31 pm-4:35 am

3 stops50h 04m

$1,564

MonroviaPhiladelphia

ROB - PHL

ROBPHL

Monrovia Roberts Intl

Sun 12/21

5:35 am-3:35 pm

2 stops39h 00m

Philadelphia

Tue 1/6

7:40 pm-4:35 am

2 stops51h 55m

$1,569

MonroviaPhiladelphia

ROB - PHL

ROBPHL

Monrovia Roberts Intl

Tue 12/23

10:45 pm-11:30 pm

2 stops29h 45m

Philadelphia

Mon 1/5

8:27 am-9:15 pm

3 stops31h 48m

$1,648

MonroviaPhiladelphia

ROB - PHL

ROBPHL

Monrovia Roberts Intl

Sun 12/21

10:45 pm-12:45 am

2 stops31h 00m

Philadelphia

Mon 1/5

10:39 am-9:15 pm

3 stops29h 36m

$1,708

MonroviaPhiladelphia

ROB - PHL

ROBPHL

Monrovia Roberts Intl

Sun 2/1

10:45 pm-6:55 pm

2 stops25h 10m

Philadelphia

Tue 6/30

5:35 pm-7:50 pm

3 stops22h 15m

$1,718

MonroviaPhiladelphia

ROB - PHL

ROBPHL

Monrovia Roberts Intl

Sun 12/21

10:45 pm-9:55 am

2 stops40h 10m

Philadelphia

Thu 1/8

5:00 pm-9:15 pm

3 stops47h 15m

$1,774

MonroviaPhiladelphia

ROB - PHL

ROBPHL

Monrovia Roberts Intl

Sat 1/31

3:05 am-9:00 am

2 stops34h 55m

Philadelphia

Tue 6/30

8:30 pm-4:35 am

2 stops52h 05m

$1,799

MonroviaPhiladelphia

ROB - PHL

ROBPHL

Monrovia Roberts Intl

Tue 12/23

10:45 pm-5:28 pm

2 stops23h 43m

Philadelphia

Tue 1/6

1:10 pm-9:15 pm

3 stops27h 05m

$1,893

MonroviaPhiladelphia

ROB - PHL

ROBPHL

Monrovia Roberts Intl

Tue 12/23

10:45 pm-9:55 am

2 stops40h 10m

Philadelphia

Sun 1/4

6:34 pm-9:15 pm

3 stops45h 41m

$1,908

MonroviaPhiladelphia

ROB - PHL

ROBPHL

Monrovia Roberts Intl

Sun 12/21

10:45 pm-12:45 am

2 stops31h 00m

Philadelphia

Sun 1/4

6:34 pm-9:15 pm

3 stops45h 41m

$1,971

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 11 results
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Compare providers for flights from Monrovia to Philadelphia

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 Monrovia to Philadelphia in December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
ExpediaPrice Accuracy2 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
GurufarePrice Accuracy2 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
SmartFaresPrice Accuracy1 starTrust Score*1 star

*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 Monrovia-Philadelphia flights, users find the pricing of Justfly.com to be most consistent on Cheapflights vs. Justfly.com Users can find the same prices on Monrovia-Philadelphia flight deals on Cheapflights vs. Justfly.com >95% of the time. Price accuracy is based on data collected from Monrovia-Philadelphia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Monrovia-Philadelphia flights, Cheapflights users trust Justfly.com the most. Justfly.com 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 Monrovia-Philadelphia 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 Monrovia to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Monrovia 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.

Related info for your journey

Find useful and relevant information for your journey from Monrovia to Philadelphia. 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 Monrovia to Philadelphia?

    Airlines like British Airways, United Airlines, and Brussels Airlines fly from Monrovia to Philadelphia in about 25h 10m. The time it takes to get you to your destination can typically vary by up to 13h 50m. Airlines will cover a distance of 4614 mi. This flight may include one or multiple stops.

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

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

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

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

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

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

See more FAQs

Traveling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Wildwood
Pottstown
King of Prussia
Reading
Ocean City
Cherry Hill
Lewes
Dewey Beach
Ephrata
Camden
Vineland
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Newark
Millville
Chester

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Alternative routes for Monrovia to Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.
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