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Monrovia

$1,377+ 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 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — ROB
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
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Cheap 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 January 27, 2026.

This United Airlines deal was found by Cheapflights users on 1/26. 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 2/1811:59 pm
PDX
-
ROB
2 stops34h 46m
United Airlines
Sun 2/2210:45 pm
ROB
-
PDX
2 stops45h 10m
United Airlines
Deal found 1/26$1,377
This oojo deal was found by Cheapflights users on 1/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/217:03 am
PDX
-
ROB
2 stops48h 42m
Ethiopian Air
Sun 3/2911:05 am
ROB
-
PDX
3 stops36h 45m
Ethiopian Air
Deal found 1/26$2,015
This Ovago deal was found by Cheapflights users on 1/26. 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.
Sat 3/217:00 am
PDX
-
ROB
3 stops48h 45m
Multiple Airlines
Sun 3/2911:05 am
ROB
-
PDX
3 stops36h 45m
Multiple Airlines
Deal found 1/26$2,649

Find flight deals from Portland to Monrovia

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) 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 January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,377
(United Airlines)
Provider with most accurate pricing for Portland-Monrovia Roberts Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Monrovia Roberts Intl flights.
Search Deals
From Portland to Monrovia Roberts Intl
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland 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 January 27, 2026.
Use the filters below to find and compare flights from Portland to Monrovia that are best for you.

Fly from

Portland

Fly to

Monrovia

Route

Depart

Return

Price

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Wed 2/18

11:59 pm-6:45 pm

2 stops34h 46m

Monrovia Roberts Intl

Sun 2/22

10:45 pm-11:55 am

2 stops45h 10m

$1,377

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Sat 3/21

7:03 am-2:45 pm

2 stops48h 42m

Monrovia Roberts Intl

Sun 3/29

11:05 am-4:50 pm

3 stops36h 45m

$2,015

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Sat 3/21

7:00 am-2:45 pm

3 stops48h 45m

Monrovia Roberts Intl

Sun 3/29

11:05 am-4:50 pm

3 stops36h 45m

$2,649

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Compare providers for flights from Portland to Monrovia

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 Portland to Monrovia in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*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 Portland-Monrovia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Monrovia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-Monrovia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-Monrovia 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 Portland-Monrovia 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 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.

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.

  • How long is the flight from Portland to Monrovia?

    For as low as $1,377, United Airlines can have you in Monrovia from Portland in 34h 46m. The distance between Portland and Monrovia is about 6953 mi.

  • 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.

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