$841 Cheap Flights from Phoenix (PHX) to Monrovia (ROB)

View $841 flight on Fri, Oct 31, 2025Opens in a new window

Popular airlines from Phoenix Sky Harbor Intl. Airport (PHX) to Monrovia (ROB-Roberts Intl.)

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Cheap Flights from Phoenix to Monrovia (PHX-ROB)

Prices were available within the past 7 days and start at $841 for one-way flights and $1,516 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sat, Nov 1 - Tue, Nov 18
PHX
Phoenix
ROB
Monrovia
$1,516 Roundtrip, found 1 day ago
$1,516
Roundtrip
found 1 day ago
Select United flight, departing Sat, Nov 1 from Phoenix to Monrovia, returning Tue, Nov 18, priced at $1,516 found 1 day ago
Delta
Tue, Oct 21 - Wed, Oct 29
PHX
Phoenix
ROB
Monrovia
$1,551 Roundtrip, found 2 days ago
$1,551
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Oct 21 from Phoenix to Monrovia, returning Wed, Oct 29, priced at $1,551 found 2 days ago
Delta
Tue, Oct 21 - Mon, Oct 27
PHX
Phoenix
ROB
Monrovia
$1,563 Roundtrip, found 3 days ago
$1,563
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Oct 21 from Phoenix to Monrovia, returning Mon, Oct 27, priced at $1,563 found 3 days ago
United
Sat, Nov 1 - Tue, Nov 18
PHX
Phoenix
ROB
Monrovia
$1,596 Roundtrip, found 1 day ago
$1,596
Roundtrip
found 1 day ago
Select United flight, departing Sat, Nov 1 from Phoenix to Monrovia, returning Tue, Nov 18, priced at $1,596 found 1 day ago
JetBlue Airways
Fri, Oct 31 - Wed, Nov 12
PHX
Phoenix
ROB
Monrovia
$1,605 Roundtrip, found 1 day ago
$1,605
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Fri, Oct 31 from Phoenix to Monrovia, returning Wed, Nov 12, priced at $1,605 found 1 day ago
JetBlue Airways
Mon, Jan 5 - Wed, Jan 21
PHX
Phoenix
ROB
Monrovia
$1,607 Roundtrip, found 1 day ago
$1,607
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Mon, Jan 5 from Phoenix to Monrovia, returning Wed, Jan 21, priced at $1,607 found 1 day ago
United
Sat, Nov 22 - Thu, Dec 11
PHX
Phoenix
ROB
Monrovia
$1,611 Roundtrip, found 1 day ago
$1,611
Roundtrip
found 1 day ago
Select United flight, departing Sat, Nov 22 from Phoenix to Monrovia, returning Thu, Dec 11, priced at $1,611 found 1 day ago
United
Fri, Jan 30 - Sun, Feb 15
PHX
Phoenix
ROB
Monrovia
$1,616 Roundtrip, found 1 day ago
$1,616
Roundtrip
found 1 day ago
Select United flight, departing Fri, Jan 30 from Phoenix to Monrovia, returning Sun, Feb 15, priced at $1,616 found 1 day ago
Air Canada
Mon, Oct 27 - Fri, Nov 14
PHX
Phoenix
ROB
Monrovia
$1,695 Roundtrip, found 1 day ago
$1,695
Roundtrip
found 1 day ago
Select Air Canada flight, departing Mon, Oct 27 from Phoenix to Monrovia, returning Fri, Nov 14, priced at $1,695 found 1 day ago
Brussels Airlines
Tue, Oct 21 - Wed, Oct 29
PHX
Phoenix
ROB
Monrovia
$1,710 Roundtrip, found 2 days ago
$1,710
Roundtrip
found 2 days ago
Select Brussels Airlines flight, departing Tue, Oct 21 from Phoenix to Monrovia, returning Wed, Oct 29, priced at $1,710 found 2 days ago

Frequently asked questions

How much does a flight from Sky Harbor Intl. Airport (PHX) to Roberts Intl. Airport (ROB) cost?
Grab a cheap one-way flight from $841 or cheap return flight from $1,516 from Sky Harbor Intl. Airport (PHX) to Roberts Intl. Airport (ROB) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Sky Harbor Intl. Airport (PHX) to Roberts Intl. Airport (ROB)?
Flying in November may help you find better deals, as it's the cheapest month for flights between PHX and ROB. You'll typically find the lowest prices during off-peak months.
What is the cheapest airline that flies from Sky Harbor Intl. Airport (PHX) to Roberts Intl. Airport (ROB)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest PHX to ROB flight.
How many flights per day from Sky Harbor Intl. Airport (PHX) to Roberts Intl. Airport (ROB)?
Nonstop flights from Sky Harbor Intl. Airport (PHX) to Roberts Intl. Airport (ROB) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from PHX to ROB?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* But this can vary depending on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Sky Harbor Intl. Airport (PHX) to Roberts Intl. Airport (ROB)?
To avoid possible delays on the Sky Harbor Intl. Airport (PHX) to Roberts Intl. Airport (ROB) route, travel before 3 PM. Flights after this time are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Sky Harbor Intl. Airport (PHX) to Roberts Intl. Airport (ROB) last-minute?
Booking your plane ticket from PHX to ROB right before your journey is generally more expensive. However, if there's some wiggle room with your itinerary, you could score a cheap last-minute fare.
Is it cheaper to book a PHX to ROB flight and hotel package?
You can save money by booking a PHX to ROB flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. After selecting your ideal accommodations and flights, you can add extras such as car rentals, tours and activities.
Can I cancel or change the date of my flight from Sky Harbor Intl. Airport (PHX) to Roberts Intl. Airport (ROB)?
It's usually possible to reschedule or cancel your PHX to ROB flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Travel information

Origin airport
Sky Harbor Intl.
Destination airport
Roberts Intl.
Airlines serving
American Airlines, British Airways, Delta, Royal Air Maroc, United
Roundtrip price
$1,515
Distance
6645 mi

Book with confidence

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Phoenix to Monrovia Flights

The cheapest times to fly from Phoenix to Monrovia

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Phoenix to Monrovia are during the month of November. You can find some of the cheapest flights from Phoenix to Monrovia with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Phoenix to Monrovia

Sunday is one of the best days to book for cheap flights from Phoenix to Monrovia: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Phoenix to Monrovia

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Phoenix to Monrovia in 2025. You can also book with separate airlines for your outbound and return journeys, from $841 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Phoenix to Monrovia flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Phoenix to Monrovia airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Phoenix to Monrovia Flights
*Available to One Key members.