HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Monrovia

$1,844+ Cheap flights from Phoenix to Monrovia (ROB)

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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
PHX — ROB
Aug 12 — Aug 191
Tue 8/12
Tue 8/19
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Phoenix 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 Phoenix to Monrovia

Discover tips and strategies to find the most affordable flight options for your journey from Phoenix (PH1) 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 7, 2025.

Round-trip from

$1,844
(United Airlines)

Popular in

July

Cheapest in

April
From Phoenix to Monrovia Roberts Intl
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($644 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($72 potential savings vs. average RT price).
Search Deals

Find flight deals from Phoenix to Monrovia

Cheapest flights from Phoenix to Monrovia
Explore the most affordable flight options available from Phoenix to Monrovia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 7, 2025.

This United Airlines deal was found by Cheapflights users on 8/6. 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 12/88:52 amPHX - ROB
3 stops29h 18mUnited Airlines
Tue 1/1310:35 pmROB - PHX
2 stops46h 22mUnited Airlines
Deal found 8/6$1,844
This United Airlines deal was found by Cheapflights users on 8/6. 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 12/88:52 amPHX - ROB
3 stops29h 18mUnited Airlines
Wed 1/1410:35 pmROB - PHX
2 stops48h 10mUnited Airlines
Deal found 8/6$1,845
This United Airlines deal was found by Cheapflights users on 8/6. 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 12/71:45 pmPHX - ROB
3 stops48h 25mUnited Airlines
Tue 1/1310:35 pmROB - PHX
2 stops46h 22mUnited Airlines
Deal found 8/6$1,855
This United Airlines deal was found by Cheapflights users on 8/6. 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 12/73:55 pmPHX - ROB
3 stops46h 15mUnited Airlines
Wed 1/1410:35 pmROB - PHX
2 stops48h 10mUnited Airlines
Deal found 8/6$1,857
This United Airlines deal was found by Cheapflights users on 8/6. 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 12/71:45 pmPHX - ROB
3 stops48h 25mUnited Airlines
Sun 1/1810:35 pmROB - PHX
3 stops53h 45mUnited Airlines
Deal found 8/6$1,864
This Ovago deal was found by Cheapflights users on 8/5. 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 12/248:25 pmPHX - ROB
2 stops25h 10mBritish Airways
Fri 2/65:35 amROB - PHX
3 stops43h 42mBritish Airways
Deal found 8/5$1,883
This United Airlines deal was found by Cheapflights users on 8/6. 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 12/123:55 pmPHX - ROB
3 stops46h 15mUnited Airlines
Wed 1/1410:35 pmROB - PHX
2 stops44h 56mUnited Airlines
Deal found 8/6$1,931
This United Airlines deal was found by Cheapflights users on 8/6. 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 12/123:55 pmPHX - ROB
3 stops46h 15mUnited Airlines
Sun 1/1810:35 pmROB - PHX
3 stops53h 45mUnited Airlines
Deal found 8/6$1,940
This United Airlines deal was found by Cheapflights users on 8/6. 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.
Wed 12/1010:45 amPHX - ROB
3 stops49h 00mUnited Airlines
Tue 1/1310:35 pmROB - PHX
2 stops46h 22mUnited Airlines
Deal found 8/6$1,941
This United Airlines deal was found by Cheapflights users on 8/6. 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.
Wed 12/1010:45 amPHX - ROB
3 stops49h 00mUnited Airlines
Wed 1/1410:35 pmROB - PHX
2 stops48h 10mUnited Airlines
Deal found 8/6$1,942

Cheapflights Fare Finder

 
Customize your flight search to find flights from Phoenix 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 7, 2025.
Use the filters below to find and compare flights from Phoenix to Monrovia that are best for you.

Fly from

Phoenix

Fly to

Monrovia

Route

Depart

Return

Price

PhoenixMonrovia

PHX - ROB

PHXROB

Phoenix Sky Harbor Intl

Mon 12/8

8:52 am-9:10 pm

3 stops29h 18m

Monrovia Roberts Intl

Tue 1/13

10:35 pm-1:57 pm

2 stops46h 22m

$1,844

PhoenixMonrovia

PHX - ROB

PHXROB

Phoenix Sky Harbor Intl

Mon 12/8

8:52 am-9:10 pm

3 stops29h 18m

Monrovia Roberts Intl

Wed 1/14

10:35 pm-3:45 pm

2 stops48h 10m

$1,845

PhoenixMonrovia

PHX - ROB

PHXROB

Phoenix Sky Harbor Intl

Sun 12/7

1:45 pm-9:10 pm

3 stops48h 25m

Monrovia Roberts Intl

Tue 1/13

10:35 pm-1:57 pm

2 stops46h 22m

$1,855

PhoenixMonrovia

PHX - ROB

PHXROB

Phoenix Sky Harbor Intl

Sun 12/7

3:55 pm-9:10 pm

3 stops46h 15m

Monrovia Roberts Intl

Wed 1/14

10:35 pm-3:45 pm

2 stops48h 10m

$1,857

PhoenixMonrovia

PHX - ROB

PHXROB

Phoenix Sky Harbor Intl

Sun 12/7

1:45 pm-9:10 pm

3 stops48h 25m

Monrovia Roberts Intl

Sun 1/18

10:35 pm-9:20 pm

3 stops53h 45m

$1,864

PhoenixMonrovia

PHX - ROB

PHXROB

Phoenix Sky Harbor Intl

Wed 12/24

8:25 pm-4:35 am

2 stops25h 10m

Monrovia Roberts Intl

Fri 2/6

5:35 am-6:17 pm

3 stops43h 42m

$1,883

PhoenixMonrovia

PHX - ROB

PHXROB

Phoenix Sky Harbor Intl

Fri 12/12

3:55 pm-9:10 pm

3 stops46h 15m

Monrovia Roberts Intl

Wed 1/14

10:35 pm-12:31 pm

2 stops44h 56m

$1,931

PhoenixMonrovia

PHX - ROB

PHXROB

Phoenix Sky Harbor Intl

Fri 12/12

3:55 pm-9:10 pm

3 stops46h 15m

Monrovia Roberts Intl

Sun 1/18

10:35 pm-9:20 pm

3 stops53h 45m

$1,940

PhoenixMonrovia

PHX - ROB

PHXROB

Phoenix Sky Harbor Intl

Wed 12/10

10:45 am-6:45 pm

3 stops49h 00m

Monrovia Roberts Intl

Tue 1/13

10:35 pm-1:57 pm

2 stops46h 22m

$1,941

PhoenixMonrovia

PHX - ROB

PHXROB

Phoenix Sky Harbor Intl

Wed 12/10

10:45 am-6:45 pm

3 stops49h 00m

Monrovia Roberts Intl

Wed 1/14

10:35 pm-3:45 pm

2 stops48h 10m

$1,942

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/6

Best time to book a flight from Phoenix to Monrovia

Have a flexible travel schedule? Discover the best time to fly to Monrovia from Phoenix 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 Phoenix to Monrovia
No data available for this route at this time. Please check back soon.

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 7, 2025.
See what other customers who have flown with SWISS, United Airlines, and American Airlines from Phoenix to Monrovia have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
SWISS
7.6
Good
1,692 reviews

Comfort

7.4

Entertainment

6.8

Food

7.1

Crew

8.2

Boarding

7.7

Overall

7.6

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

BOS - ZRH

Food was not very good and the options were poor. The seat wasn't very comfortable. I would not choose to fly on this airline again. Their website was also difficult to navigate.
SWISS
7.6
Good
1,692 reviews
SWISS
7.6
Good
1,692 reviews

Comfort

7.4

Entertainment

6.8

Food

7.1

Crew

8.2

Boarding

7.7

Overall

7.6

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

BOS - ZRH

Food was not very good and the options were poor. The seat wasn't very comfortable. I would not choose to fly on this airline again. Their website was also difficult to navigate.
United Airlines
7.4
Good
8,916 reviews
SWISS
7.6
Good
1,692 reviews

Comfort

7.4

Entertainment

6.8

Food

7.1

Crew

8.2

Boarding

7.7

Overall

7.6

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

BOS - ZRH

Food was not very good and the options were poor. The seat wasn't very comfortable. I would not choose to fly on this airline again. Their website was also difficult to navigate.
American Airlines
7.2
Good
10,000 reviews
SWISS
7.6
Good
1,692 reviews

Comfort

7.4

Entertainment

6.8

Food

7.1

Crew

8.2

Boarding

7.7

Overall

7.6

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

BOS - ZRH

Food was not very good and the options were poor. The seat wasn't very comfortable. I would not choose to fly on this airline again. Their website was also difficult to navigate.
Kenya Airways
6.9
Okay
275 reviews
SWISS
7.6
Good
1,692 reviews

Comfort

7.4

Entertainment

6.8

Food

7.1

Crew

8.2

Boarding

7.7

Overall

7.6

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

BOS - ZRH

Food was not very good and the options were poor. The seat wasn't very comfortable. I would not choose to fly on this airline again. Their website was also difficult to navigate.
British Airways
6.7
Okay
7,251 reviews
SWISS
7.6
Good
1,692 reviews

Comfort

7.4

Entertainment

6.8

Food

7.1

Crew

8.2

Boarding

7.7

Overall

7.6

Reviews

1 / 20
6.0
Good

Yvette,Nov 2024

BOS - ZRH

Food was not very good and the options were poor. The seat wasn't very comfortable. I would not choose to fly on this airline again. Their website was also difficult to navigate.

Related info for your journey

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

  • What airport do you fly into for flights to Monrovia from Phoenix?

    Most people fly into Monrovia Roberts Intl (ROB) if they book a flight to Monrovia from Phoenix. On average, Roberts Intl has 0 inbound flights from Phoenix per day from 1 airline. Monrovia Roberts Intl is conveniently located just 30.2 mi from Monrovia’s city center.

  • What is the cheapest airline to fly from Phoenix to Monrovia round-trip?

    Our cheapest airline available from Phoenix to Monrovia is United Airlines. Our recent data shows that you can find tickets from as low as $1,844 on this airline. This flight start at 4% lower than the current average price 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Phoenix 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 Phoenix to Monrovia?

    Currently, September is the cheapest month in which you can book a flight from Phoenix to Monrovia (average of $1,197). Flying from Phoenix to Monrovia in May is currently the most expensive (average of $1,858). 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 Phoenix to Monrovia

See prices for flight routes from nearby airports that may be better suited for you.
Sky Harbor Intl to Monrovia flights

Top airline flying from Phoenix to Monrovia

Discover the top airline that operate flights from Phoenix 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 7, 2025.
AirlineCheapestAverageFlexibilityOn-time
Brussels AirlinesCheapest$1,203Average$1,723FlexibilityNo cancel feeOn-timeN/A

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.