What is the cheapest month to book a flight from Portland to Monrovia?

Currently, September is the cheapest month in which you can book a flight from Portland to Monrovia (average of $1,197). Flying from Portland 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.

What is the cheapest day to fly from Portland to Monrovia?

Travelers seeking maximum savings on their Portland to Monrovia flight should consider departing on Wednesday evenings when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

What is the cheapest day to fly round-trip from Portland to Monrovia?

Flights from Portland to Monrovia are found to be more expensive on Saturday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Monrovia.

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

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

How can I find direct flights from Portland to Monrovia?

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

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

Yes. Cheapflights offers flight deals from Portland 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.

$1,685+ Flights from Portland to Monrovia

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Cheap flight deals from Portland to Monrovia

Round-trip from	$1,685 (United Airlines)

From Portland to Monrovia Roberts Intl

Search Deals

Find flight deals from Portland to Monrovia

Cheapest flights from Portland to Monrovia
Explore the most affordable flight options available from Portland to Monrovia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Sat 9/278:08 amPDX - ROB

3 stops28h 42mBrussels Airlines

Wed 10/19:10 pmROB - PDX

2 stops30h 10mBrussels Airlines

Deal found 7/27

$1,685

Best flights from Portland to Monrovia
Discover carefully curated flight deals from Portland to Monrovia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2025.

Sat 9/277:00 amPDX - ROB

3 stops29h 50mUnited Airlines

Wed 10/19:10 pmROB - PDX

3 stops32h 35mUnited Airlines

Deal found 7/27

$1,685

Fly from

Fly to

Route

Depart

Return

Price

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Sat 9/27

7:00 am-7:50 pm

3 stops29h 50m

Monrovia Roberts Intl

Wed 10/1

9:10 pm-10:45 pm

3 stops32h 35m

$1,685

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Best time to book a flight from Portland to Monrovia

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

What is the cheapest time of day to fly from PDX to ROB?

Unlike at noon, when flights are generally more expensive, you can save up to 9% on flights from Portland to Monrovia by exploring options for tickets in the morning.

Reviews of airlines servicing Monrovia

Read reviews from past customers who have flown United Airlines from Portland to Monrovia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,899 reviews

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

United Airlines

7.4

Good

8,899 reviews

United Airlines

7.4

Good

8,899 reviews

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Can I find deals for flights from Portland to Monrovia that include hotel bookings?
Yes. In addition to deals on Portland to Monrovia flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Portland to Monrovia?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Monrovia.
Can I find deals for business class flights from Portland to Monrovia?
Yes. Cheapflights offers flight deals from Portland 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 Portland to Monrovia?
Currently, September is the cheapest month in which you can book a flight from Portland to Monrovia (average of $1,197). Flying from Portland 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.

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$1,685+ Cheap flights from Portland (PDX) 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 9/27. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Portland to Monrovia with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Portland to Monrovia

Round-trip from

Find flight deals from Portland to Monrovia

Cheapest flights from Portland to MonroviaExplore the most affordable flight options available from Portland to Monrovia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Explore the most affordable flight options available from Portland to Monrovia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to Monrovia that are best for you.

Best time to book a flight from Portland to Monrovia

Have a flexible travel schedule? Discover the best time to fly to Monrovia from Portland with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Portland to Monrovia

What is the cheapest time of day to fly from PDX to ROB?

Find hourly flight availability from Portland to Monrovia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2025.

Reviews of airlines servicing Monrovia

Read reviews from past customers who have flown United Airlines from Portland to Monrovia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

How can I find direct flights from Portland to Monrovia?

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

What is the cheapest month to book a flight from Portland to Monrovia?

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 Portland to Monrovia

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Travel Smart

Cheapest flights from Portland to Monrovia
Explore the most affordable flight options available from Portland to Monrovia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.