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$1,684+ 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.
PDX — ROB
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$1,684
(Brussels Airlines)
From Portland to Monrovia Roberts Intl
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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 September 11, 2025.

This Brussels Airlines deal was found by Cheapflights users on 9/9. 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 Brussels Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/278:08 amPDX - ROB
3 stops28h 42mBrussels Airlines
Wed 10/19:10 pmROB - PDX
2 stops28h 21mBrussels Airlines
Deal found 9/9$1,684
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/271:25 pmPDX - ROB
2 stops45h 15mDelta
Wed 10/16:40 pmROB - PDX
2 stops33h 25mDelta
Deal found 9/9$2,213
This oojo deal was found by Cheapflights users on 9/11. 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.
Fri 12/57:04 amPDX - ROB
2 stops47h 41mEthiopian Air
Tue 1/611:05 amROB - PDX
3 stops37h 34mEthiopian Air
Deal found 9/11$2,331
This Expedia deal was found by Cheapflights users on 9/11. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/55:45 pmPDX - ROB
2 stops26h 50mMultiple Airlines
Tue 1/610:45 pmROB - PDX
2 stops28h 11mMultiple Airlines
Deal found 9/11$5,140

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 September 11, 2025.
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

Sat 9/27

8:08 am-7:50 pm

3 stops28h 42m

Monrovia Roberts Intl

Wed 10/1

9:10 pm-6:31 pm

2 stops28h 21m

$1,684

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-12:28 am

3 stops34h 18m

$1,835

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Sat 9/27

1:25 pm-5:40 pm

2 stops45h 15m

Monrovia Roberts Intl

Wed 10/1

6:40 pm-9:05 pm

2 stops33h 25m

$2,213

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Fri 12/5

7:04 am-2:45 pm

2 stops47h 41m

Monrovia Roberts Intl

Tue 1/6

11:05 am-4:39 pm

3 stops37h 34m

$2,331

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Fri 12/5

5:45 pm-4:35 am

2 stops26h 50m

Monrovia Roberts Intl

Tue 1/6

10:45 pm-6:56 pm

2 stops28h 11m

$5,140

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

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?

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 September 11, 2025.

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.

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 $1,684, Brussels Airlines can have you in Monrovia from Portland in 28h 42m. The distance between Portland and Monrovia is about 6953 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 $1,845). 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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