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$1,306+ Cheap flights from Monrovia (ROB) to Philadelphia (PHL)

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 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
ROB — PHL
Apr 14 — Apr 211
Tue 4/14
Tue 4/21
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 March 15, 2026.

This FlightHub deal was found by Cheapflights users on 3/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/147:30 am
ROB
-
PHL
2 stops29h 30m
Multiple Airlines
Mon 9/218:30 pm
PHL
-
ROB
2 stops41h 20m
Multiple Airlines
Deal found 3/11$1,612
This FlightHub deal was found by Cheapflights users on 3/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/147:30 am
ROB
-
PHL
2 stops29h 30m
Multiple Airlines
Sun 9/208:30 pm
PHL
-
ROB
3 stops41h 20m
Multiple Airlines
Deal found 3/11$1,624
This Expedia deal was found by Cheapflights users on 3/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/155:45 am
ROB
-
PHL
2 stops31h 15m
Multiple Airlines
Sun 9/208:30 pm
PHL
-
ROB
2 stops52h 05m
Multiple Airlines
Deal found 3/11$1,750
This Gotogate deal was found by Cheapflights users on 3/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/149:10 pm
ROB
-
PHL
2 stops22h 55m
Multiple Airlines
Tue 9/2210:05 am
PHL
-
ROB
3 stops29h 45m
Multiple Airlines
Deal found 3/11$1,756
This United Airlines deal was found by Cheapflights users on 3/11. 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 7/129:10 pm
ROB
-
PHL
2 stops41h 20m
United Airlines
Mon 9/2110:28 am
PHL
-
ROB
3 stops29h 22m
United Airlines
Deal found 3/11$1,780
This United Airlines deal was found by Cheapflights users on 3/11. 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 7/149:10 pm
ROB
-
PHL
2 stops40h 35m
United Airlines
Fri 9/187:55 pm
PHL
-
ROB
3 stops43h 55m
United Airlines
Deal found 3/11$1,855
This Brussels Airlines deal was found by Cheapflights users on 3/11. 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 Brussels Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/149:10 pm
ROB
-
PHL
3 stops25h 44m
Brussels Airlines
Mon 9/215:40 pm
PHL
-
ROB
3 stops22h 10m
Brussels Airlines
Deal found 3/11$2,013
This Brussels Airlines deal was found by Cheapflights users on 3/11. 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 Brussels Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/149:10 pm
ROB
-
PHL
3 stops25h 44m
Brussels Airlines
Sun 9/205:40 pm
PHL
-
ROB
3 stops46h 10m
Brussels Airlines
Deal found 3/11$2,027
This United Airlines deal was found by Cheapflights users on 3/11. 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 7/179:10 pm
ROB
-
PHL
2 stops31h 47m
United Airlines
Sun 9/207:55 pm
PHL
-
ROB
3 stops43h 55m
United Airlines
Deal found 3/11$2,185

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 March 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,612
(FlightHub)

One-way from

$1,306
(Kiwi.com)
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
Search Deals
One-way flight from Monrovia Roberts Intl to Philadelphia
Search Deals

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 March 15, 2026.
Use the filters below to find and compare flights from Monrovia to Philadelphia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MonroviaPhiladelphia

ROB - PHL

ROBPHL

Monrovia Roberts Intl

Sun 7/12

9:10 pm-11:44 pm

2 stops30h 34m

Philadelphia

Fri 9/18

7:55 pm-7:50 pm

3 stops43h 55m

$1,780

MonroviaPhiladelphia

ROB - PHL

ROBPHL

Monrovia Roberts Intl

Tue 7/14

9:10 pm-9:45 am

2 stops40h 35m

Philadelphia

Sat 9/19

10:28 am-7:50 pm

3 stops29h 22m

$1,855

MonroviaPhiladelphia

ROB - PHL

ROBPHL

Monrovia Roberts Intl

Tue 7/14

9:10 pm-9:45 am

2 stops40h 35m

Philadelphia

Thu 9/17

10:28 am-7:50 pm

3 stops29h 22m

$1,855

MonroviaPhiladelphia

ROB - PHL

ROBPHL

Monrovia Roberts Intl

Tue 7/14

9:10 pm-9:45 am

2 stops40h 35m

Philadelphia

Wed 9/23

7:55 pm-7:50 pm

3 stops43h 55m

$1,855

MonroviaPhiladelphia

ROB - PHL

ROBPHL

Monrovia Roberts Intl

Tue 7/14

9:10 pm-6:54 pm

3 stops25h 44m

Philadelphia

Sun 9/20

5:40 pm-7:50 pm

3 stops46h 10m

$2,027
Quickest round-trip

MonroviaPhiladelphia

ROB - PHL

ROBPHL

Monrovia Roberts Intl

Fri 7/17

9:10 pm-12:57 am

2 stops31h 47m

Philadelphia

Tue 9/22

10:28 am-7:50 pm

3 stops29h 22m

$2,185
Cheapest one-way
Quickest one-way

MonroviaPhiladelphia

ROB - PHL

ROBPHL

Monrovia Roberts Intl

Mon 4/6

6:50 pm-4:48 pm

3 stops49h 58m

$1,306

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

Sorted by cheapest first

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 March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars
GurufarePrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Monrovia-Philadelphia flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 United Airlines fly from Monrovia to Philadelphia in about 30h 34m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 4614 mi.

  • 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
Reading
King of Prussia
Camden
Ocean City
Cherry Hill
Lewes
Dewey Beach
Pottstown
Ephrata
Vineland
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Glen Mills
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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