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Monrovia

$1,494+ 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 5 — Feb 121
Thu 2/5
Thu 2/12
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 January 6, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,494
(United Airlines)
Provider with most accurate pricing for Portland-Monrovia Roberts Intl flight deals.
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Provider most trusted by Cheapflights users for Portland-Monrovia Roberts Intl flights.
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From Portland to Monrovia Roberts Intl
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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 January 6, 2026.

This United Airlines deal was found by Cheapflights users on 1/5. 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 pmPDX - ROB
2 stops34h 46mUnited Airlines
Sun 2/2210:45 pmROB - PDX
2 stops28h 04mUnited Airlines
Deal found 1/5$1,494
This United Airlines deal was found by Cheapflights users on 1/5. 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.
Fri 2/2010:56 amPDX - ROB
3 stops26h 19mUnited Airlines
Fri 2/278:05 pmROB - PDX
3 stops34h 51mUnited Airlines
Deal found 1/5$1,536
This Delta deal was found by Cheapflights users on 1/5. 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.
Sun 3/157:00 amPDX - ROB
2 stops27h 40mDelta
Mon 3/236:40 pmROB - PDX
2 stops34h 30mDelta
Deal found 1/5$1,880
This KAYAK deal was found by Cheapflights users on 1/6. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/247:20 amPDX - ROB
2 stops38h 15mMultiple Airlines
Wed 7/155:45 amROB - PDX
2 stops46h 03mMultiple Airlines
Deal found 1/6$1,897
This KAYAK deal was found by Cheapflights users on 1/6. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/243:03 pmPDX - ROB
3 stops30h 32mBritish Airways
Wed 7/155:45 amROB - PDX
2 stops42h 55mBritish Airways
Deal found 1/6$2,022
This KAYAK deal was found by Cheapflights users on 1/5. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/157:25 amPDX - ROB
3 stops27h 25mMultiple Airlines
Mon 3/237:30 amROB - PDX
3 stops44h 10mMultiple Airlines
Deal found 1/5$2,042

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 6, 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-8:43 pm

2 stops29h 58m

$1,494

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Fri 2/20

10:56 am-9:15 pm

3 stops26h 19m

Monrovia Roberts Intl

Fri 2/27

8:05 pm-10:56 pm

3 stops34h 51m

$1,536

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Sun 3/15

7:00 am-5:40 pm

2 stops27h 40m

Monrovia Roberts Intl

Mon 3/23

6:40 pm-10:10 pm

2 stops34h 30m

$1,880

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Wed 6/24

7:20 am-4:35 am

2 stops38h 15m

Monrovia Roberts Intl

Wed 7/15

5:45 am-8:48 pm

2 stops46h 03m

$1,897

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Wed 6/24

3:03 pm-4:35 am

3 stops30h 32m

Monrovia Roberts Intl

Wed 7/15

5:45 am-5:40 pm

2 stops42h 55m

$2,022

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Sun 3/15

7:25 am-5:50 pm

3 stops27h 25m

Monrovia Roberts Intl

Mon 3/23

7:30 am-8:40 pm

3 stops44h 10m

$2,042

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/4

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 Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland-Monrovia flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 $1,880, United Airlines can have you in Monrovia from Portland in 27h 40m. 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.

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