$846 Cheap Flights from Phoenix (PHX) to Monrovia (ROB)

View $846 flight on Fri, May 2, 2025Opens in a new window

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

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key
Find available prices by choosing your travel dates.

Cheap Flights from Phoenix to Monrovia (PHX-ROB)

Prices were available within the past 7 days and start at $846 for one-way flights and $1,436 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Sep 25 - Mon, Oct 27
PHX
Phoenix
ROB
Monrovia
$1,436 Roundtrip, found 2 days ago
$1,436
Roundtrip
found 2 days ago
Select United flight, departing Thu, Sep 25 from Phoenix to Monrovia, returning Mon, Oct 27, priced at $1,436 found 2 days ago
United
Thu, Sep 25 - Thu, Oct 23
PHX
Phoenix
ROB
Monrovia
$1,496 Roundtrip, found 2 days ago
$1,496
Roundtrip
found 2 days ago
Select United flight, departing Thu, Sep 25 from Phoenix to Monrovia, returning Thu, Oct 23, priced at $1,496 found 2 days ago
Air Canada
Thu, Jul 31 - Fri, Aug 15
PHX
Phoenix
ROB
Monrovia
$1,643 Roundtrip, found 2 days ago
$1,643
Roundtrip
found 2 days ago
Select Air Canada flight, departing Thu, Jul 31 from Phoenix to Monrovia, returning Fri, Aug 15, priced at $1,643 found 2 days ago
Brussels Airlines
Thu, Oct 16 - Tue, Nov 18
PHX
Phoenix
ROB
Monrovia
$1,648 Roundtrip, found 2 days ago
$1,648
Roundtrip
found 2 days ago
Select Brussels Airlines flight, departing Thu, Oct 16 from Phoenix to Monrovia, returning Tue, Nov 18, priced at $1,648 found 2 days ago
Air Canada
Thu, Jul 31 - Fri, Aug 15
PHX
Phoenix
ROB
Monrovia
$1,650 Roundtrip, found 2 days ago
$1,650
Roundtrip
found 2 days ago
Select Air Canada flight, departing Thu, Jul 31 from Phoenix to Monrovia, returning Fri, Aug 15, priced at $1,650 found 2 days ago
Air Canada
Thu, Dec 25 - Fri, Jan 23
PHX
Phoenix
ROB
Monrovia
$1,653 Roundtrip, found 5 days ago
$1,653
Roundtrip
found 5 days ago
Select Air Canada flight, departing Thu, Dec 25 from Phoenix to Monrovia, returning Fri, Jan 23, priced at $1,653 found 5 days ago
Air Canada
Thu, Dec 25 - Fri, Jan 23
PHX
Phoenix
ROB
Monrovia
$1,663 Roundtrip, found 5 days ago
$1,663
Roundtrip
found 5 days ago
Select Air Canada flight, departing Thu, Dec 25 from Phoenix to Monrovia, returning Fri, Jan 23, priced at $1,663 found 5 days ago
Air Canada
Thu, Dec 25 - Fri, Jan 23
PHX
Phoenix
ROB
Monrovia
$1,665 Roundtrip, found 5 days ago
$1,665
Roundtrip
found 5 days ago
Select Air Canada flight, departing Thu, Dec 25 from Phoenix to Monrovia, returning Fri, Jan 23, priced at $1,665 found 5 days ago
British Airways
Fri, Jun 6 - Fri, Jul 4
PHX
Phoenix
ROB
Monrovia
$1,891 Roundtrip, found 1 hour ago
$1,891
Roundtrip
found 1 hour ago
Select British Airways flight, departing Fri, Jun 6 from Phoenix to Monrovia, returning Fri, Jul 4, priced at $1,891 found 1 hour ago
Kenya Airways
Mon, Aug 25 - Mon, Sep 8
PHX
Phoenix
ROB
Monrovia
$2,112 Roundtrip, found 1 day ago
$2,112
Roundtrip
found 1 day ago
Select Kenya Airways flight, departing Mon, Aug 25 from Phoenix to Monrovia, returning Mon, Sep 8, priced at $2,112 found 1 day ago
Flights from Phoenix (PHX) to Monrovia (ROB)
Origin airport
Sky Harbor Intl.
Destination airport
Roberts Intl.
Airlines serving
British Airways, Brussels Airlines, Kenya Airways, Royal Air Maroc, United
Roundtrip price
$1,435
Distance
6645 mi

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 September. 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 $846 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.

Frequently asked questions

How much does a flight from Sky Harbor Intl. Airport (PHX) to Roberts Intl. Airport (ROB) cost?
Discover the latest flight deals from PHX to ROB by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from PHX to ROB?
The cheapest flights from PHX to ROB are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from PHX to ROB?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from PHX to ROB. Sort your results by “Price (lowest to highest)” to snap up a great deal.
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.

Explore a world of travel with Expedia

*Available to One Key members.