How do I get Price Alerts for flights from Portland to Monrovia?

Confirm your travel details to search for the latest offers for flights from Portland to Monrovia . While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

How can I save money on flights from Portland to Monrovia with momondo?

Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore” . Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

How does momondo find its flight prices?

We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

When did momondo last update prices for flights from Portland Airport to Monrovia Roberts Intl Airport?

Prices for flights from Portland Airport to Monrovia Roberts Intl Airport were last updated today.

How many operators does momondo search for flights from Portland Airport to Monrovia Roberts Intl Airport?

As of September 2026, there is 1 operator available to choose from for flights from Portland Airport to Monrovia Roberts Intl Airport.

How old do you have to be to fly from Portland Airport to Monrovia Roberts Intl Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to Monrovia Roberts Intl Airport.

What documentation or ID do you need to fly to Monrovia Roberts Intl Airport?

The required travel and health documents for your Monrovia Roberts Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Monrovia Roberts Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$1,544 Cheap Flights from Portland to Monrovia in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Portland to Monrovia

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:15 pm - 5:50 pmPDX Portland-ROB Monrovia Roberts Intl

35h 35m2 stops Newark Lome

11:05 am - 10:27 pmROB Monrovia Roberts Intl-PDX Portland

43h 22m3 stops Addis Ababa Bole Rome Fiumicino Washington, D.C. Dulles Intl

$1,544Ethiopian Air

Mon, Nov 2 - Tue, Nov 10

10:15 pm - 5:50 pmPDX Portland-ROB Monrovia Roberts Intl

35h 35m3 stops Newark Lome Accra Kotoka

11:05 am - 10:27 pmROB Monrovia Roberts Intl-PDX Portland

43h 22m3 stops Addis Ababa Bole Rome Fiumicino Washington, D.C. Dulles Intl

$1,604Multiple Airlines

Mon, Nov 2 - Tue, Nov 10

10:15 pm - 5:50 pmPDX Portland-ROB Monrovia Roberts Intl

35h 35m2 stops Newark Lome

7:30 am - 12:13 pmROB Monrovia Roberts Intl-PDX Portland

36h 43m2 stops Lome Newark

$1,619Ethiopian Air

Mon, Nov 2 - Tue, Nov 10

2:35 pm - 9:15 pmPDX Portland-ROB Monrovia Roberts Intl

46h 40m3 stops Chicago O'Hare Intl Brussels Bruxelles-National Freetown Lungi Intl

10:45 pm - 6:39 pmROB Monrovia Roberts Intl-PDX Portland

27h 54m2 stops Brussels Bruxelles-National Chicago O'Hare Intl

$2,252United Airlines

Fri, Feb 5 - Tue, Feb 9

2:35 pm - 9:15 pmPDX Portland-ROB Monrovia Roberts Intl

46h 40m3 stops Chicago O'Hare Intl Brussels Bruxelles-National Freetown Lungi Intl

10:45 pm - 6:39 pmROB Monrovia Roberts Intl-PDX Portland

27h 54m2 stops Brussels Bruxelles-National Chicago O'Hare Intl

$2,253United Airlines

Fri, Feb 5 - Tue, Feb 9

2:35 pm - 9:15 pmPDX Portland-ROB Monrovia Roberts Intl

46h 40m3 stops Chicago O'Hare Intl Brussels Bruxelles-National Freetown Lungi Intl

10:45 pm - 6:39 pmROB Monrovia Roberts Intl-PDX Portland

27h 54m2 stops Brussels Bruxelles-National Chicago O'Hare Intl

$2,272United Airlines

Fri, Feb 5 - Tue, Feb 9

10:43 am - 9:15 pmPDX Portland-ROB Monrovia Roberts Intl

26h 32m3 stops Chicago O'Hare Intl Brussels Bruxelles-National Freetown Lungi Intl

10:45 pm - 10:43 pmROB Monrovia Roberts Intl-PDX Portland

55h 58m3 stops Brussels Bruxelles-National Zurich San Francisco

$2,471Multiple Airlines

Mon, Dec 7 - Wed, Jan 20

10:43 am - 9:15 pmPDX Portland-ROB Monrovia Roberts Intl

26h 32m3 stops Chicago O'Hare Intl Brussels Bruxelles-National Freetown Lungi Intl

10:45 pm - 10:43 pmROB Monrovia Roberts Intl-PDX Portland

55h 58m3 stops Brussels Bruxelles-National Zurich San Francisco

$2,481Multiple Airlines

Mon, Dec 7 - Wed, Jan 20

10:43 am - 9:15 pmPDX Portland-ROB Monrovia Roberts Intl

26h 32m3 stops Chicago O'Hare Intl Brussels Bruxelles-National Freetown Lungi Intl

10:45 pm - 10:43 pmROB Monrovia Roberts Intl-PDX Portland

55h 58m3 stops Brussels Bruxelles-National Zurich San Francisco

$2,488Multiple Airlines

Mon, Dec 7 - Wed, Jan 20

7:00 am - 9:15 pmPDX Portland-ROB Monrovia Roberts Intl

30h 15m3 stops Chicago O'Hare Intl Brussels Bruxelles-National Freetown Lungi Intl

10:45 pm - 6:39 pmROB Monrovia Roberts Intl-PDX Portland

27h 54m2 stops Brussels Bruxelles-National Chicago O'Hare Intl

$2,776Brussels Airlines

Mon, Dec 7 - Wed, Jan 20

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Ethiopian Air flights from Portland to Monrovia

Our best Ethiopian Air deals on Portland to Monrovia flight tickets

Ethiopian Air

Nov 2

PDX10:15 pmPortland

35h 35m

2 stops

ROB5:50 pmMonrovia Roberts Intl

Nov 10

ROB11:05 amMonrovia Roberts Intl

43h 22m

3 stops

PDX10:27 pmPortland

$1,544

Ethiopian Air

Nov 2

PDX10:15 pmPortland

35h 35m

2 stops

ROB5:50 pmMonrovia Roberts Intl

Nov 10

ROB7:30 amMonrovia Roberts Intl

36h 43m

2 stops

PDX12:13 pmPortland

$1,619

United Airlines flights from Portland to Monrovia

Our best United Airlines deals on Portland to Monrovia flight tickets

United Airlines

Feb 5

PDX2:35 pmPortland

46h 40m

3 stops

ROB9:15 pmMonrovia Roberts Intl

Feb 9

ROB10:45 pmMonrovia Roberts Intl

27h 54m

2 stops

PDX6:39 pmPortland

$2,252

United Airlines

Feb 5

PDX2:35 pmPortland

46h 40m

3 stops

ROB9:15 pmMonrovia Roberts Intl

Feb 9

ROB10:45 pmMonrovia Roberts Intl

27h 54m

2 stops

PDX6:39 pmPortland

$2,253

United Airlines

Feb 5

PDX2:35 pmPortland

46h 40m

3 stops

ROB9:15 pmMonrovia Roberts Intl

Feb 9

ROB10:45 pmMonrovia Roberts Intl

27h 54m

2 stops

PDX6:39 pmPortland

$2,272

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandMonrovia

PDX Portland - ROB Monrovia Roberts Intl

PDXROB

Portland

Mon 11/2

10:15 pm-5:50 pm

2 stops35h 35m

Monrovia Roberts Intl

Tue 11/10

11:05 am-10:27 pm

3 stops43h 22m

$1,544

PortlandMonrovia

PDX Portland - ROB Monrovia Roberts Intl

PDXROB

Portland

Mon 11/2

10:15 pm-5:50 pm

3 stops35h 35m

Monrovia Roberts Intl

Tue 11/10

11:05 am-10:27 pm

3 stops43h 22m

$1,604

PortlandMonrovia

PDX Portland - ROB Monrovia Roberts Intl

PDXROB

Portland

Mon 11/2

10:15 pm-5:50 pm

2 stops35h 35m

Monrovia Roberts Intl

Tue 11/10

7:30 am-12:13 pm

2 stops36h 43m

$1,619

PortlandMonrovia

PDX Portland - ROB Monrovia Roberts Intl

PDXROB

Portland

Fri 2/5

2:35 pm-9:15 pm

3 stops46h 40m

Monrovia Roberts Intl

Tue 2/9

10:45 pm-6:39 pm

2 stops27h 54m

$2,252

PortlandMonrovia

PDX Portland - ROB Monrovia Roberts Intl

PDXROB

Portland

Fri 2/5

2:35 pm-9:15 pm

3 stops46h 40m

Monrovia Roberts Intl

Tue 2/9

10:45 pm-6:39 pm

2 stops27h 54m

$2,253

PortlandMonrovia

PDX Portland - ROB Monrovia Roberts Intl

PDXROB

Portland

Fri 2/5

2:35 pm-9:15 pm

3 stops46h 40m

Monrovia Roberts Intl

Tue 2/9

10:45 pm-6:39 pm

2 stops27h 54m

$2,272

PortlandMonrovia

PDX Portland - ROB Monrovia Roberts Intl

PDXROB

Portland

Mon 12/7

10:43 am-9:15 pm

3 stops26h 32m

Monrovia Roberts Intl

Wed 1/20

10:45 pm-10:43 pm

3 stops55h 58m

$2,471

PortlandMonrovia

PDX Portland - ROB Monrovia Roberts Intl

PDXROB

Portland

Mon 12/7

10:43 am-9:15 pm

3 stops26h 32m

Monrovia Roberts Intl

Wed 1/20

10:45 pm-10:43 pm

3 stops55h 58m

$2,481

PortlandMonrovia

PDX Portland - ROB Monrovia Roberts Intl

PDXROB

Portland

Mon 12/7

10:43 am-9:15 pm

3 stops26h 32m

Monrovia Roberts Intl

Wed 1/20

10:45 pm-10:43 pm

3 stops55h 58m

$2,488

Quickest round-trip

PortlandMonrovia

PDX Portland - ROB Monrovia Roberts Intl

PDXROB

Portland

Mon 12/7

7:00 am-9:15 pm

3 stops30h 15m

Monrovia Roberts Intl

Wed 1/20

10:45 pm-6:39 pm

2 stops27h 54m

$2,776

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from Portland to Monrovia

Are you open to changing your travel dates? Check out the ideal times to fly from Portland to Monrovia according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Portland to Monrovia (PDX to ROB) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to Monrovia

Best Price Found	$1,544
Fastest flight time	30h 15m
Direct flights	None

The best flight deal from Portland to Monrovia found on momondo in the last 72 hours is $1,544

The fastest flight from Portland to Monrovia takes 30h 15m

There are no direct flights from Portland to Monrovia. There are no popular flight routes from Portland to Monrovia.

Search flight deals

Frequently asked questions about flying from Portland to Monrovia

How far is Portland to Monrovia Roberts Intl by plane?
A flight from Portland to Monrovia Roberts Intl will travel around 6934.9 mi. By plane, this route typically takes 30h 15m.
When did momondo last update prices for flights from Portland Airport to Monrovia Roberts Intl Airport?
Prices for flights from Portland Airport to Monrovia Roberts Intl Airport were last updated today.
How many operators does momondo search for flights from Portland Airport to Monrovia Roberts Intl Airport?
As of September 2026, there is 1 operator available to choose from for flights from Portland Airport to Monrovia Roberts Intl Airport.
How old do you have to be to fly from Portland Airport to Monrovia Roberts Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to Monrovia Roberts Intl Airport.
What documentation or ID do you need to fly to Monrovia Roberts Intl Airport?
The required travel and health documents for your Monrovia Roberts Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Monrovia Roberts Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Portland to Monrovia?
momondo data reveals that the most frequently booked airline on the route from Portland to Monrovia is SWISS, representing 100% of all bookings.

Best airlines flying from Portland to Monrovia

Compare and see reviews for airlines that fly from Portland to Monrovia with momondo

Airline	Rating	Free Cancellation	Price
SWISS	PriceFrom $1,958	Free Cancellation	Rating 7.5 2,077 reviews		Search SWISS flights

Frequently asked questions about flying from Portland to Monrovia

How do I get Price Alerts for flights from Portland to Monrovia?
Confirm your travel details to search for the latest offers for flights from Portland to Monrovia. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.
How can I save money on flights from Portland to Monrovia with momondo?
Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.
How does momondo find its flight prices?
We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Monrovia?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Portland to Monrovia for you.

Can I find flights from Portland to Monrovia with flexible booking policies on momondo?

Flights from Portland to Monrovia with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Portland to Monrovia?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Monrovia from Portland.

I’m not ready to book a flight from Portland to Monrovia right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Monrovia from Portland. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Monrovia trip

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SWISS

Cheap flights from Portland to Monrovia from $1,544

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Monrovia departing on 11/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Portland to Monrovia

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Cheap one-way flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Ethiopian Air flights from Portland to Monrovia

Our best Ethiopian Air deals on Portland to Monrovia flight tickets

United Airlines flights from Portland to Monrovia

Our best United Airlines deals on Portland to Monrovia flight tickets

momondo Fare Finder

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

When to book flights from Portland to Monrovia

Cheap Portland to Monrovia (PDX to ROB) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Portland to Monrovia

Best airlines flying from Portland to Monrovia

Compare and see reviews for airlines that fly from Portland to Monrovia with momondo

Frequently asked questions about flying from Portland to Monrovia

Why use momondo?

An easier way to manage your Monrovia trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Liberia

Fly your favorite airline to Monrovia

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Monrovia

List of cabin classes available on flights landing in Monrovia. Availability may vary depending on flight origin and airline.

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