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 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.

$1,377 Cheap Flights from Portland to Monrovia in 2026

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Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:59 pm - 6:45 pm

PDX

ROB

34h 46m

2 stops

10:45 pm - 11:55 am

ROB

PDX

45h 10m

2 stops

$1,377United Airlines

Wed, Feb 18 - Sun, Feb 22

1:18 pm - 6:45 pm

PDX

ROB

45h 27m

3 stops

10:45 pm - 11:55 am

ROB

PDX

45h 10m

2 stops

$1,382United Airlines

Wed, Feb 18 - Sun, Feb 22

11:59 pm - 6:45 pm

PDX

ROB

34h 46m

2 stops

10:45 pm - 8:43 pm

ROB

PDX

29h 58m

2 stops

$1,495United Airlines

Wed, Feb 18 - Sun, Feb 22

1:18 pm - 6:45 pm

PDX

ROB

45h 27m

3 stops

10:45 pm - 8:43 pm

ROB

PDX

29h 58m

2 stops

$1,500United Airlines

Wed, Feb 18 - Sun, Feb 22

11:59 pm - 6:45 pm

PDX

ROB

34h 46m

2 stops

10:45 pm - 8:43 pm

ROB

PDX

29h 58m

2 stops

$1,665United Airlines

Wed, Feb 18 - Sun, Feb 22

1:18 pm - 6:45 pm

PDX

ROB

45h 27m

3 stops

10:45 pm - 8:43 pm

ROB

PDX

29h 58m

2 stops

$1,670United Airlines

Wed, Feb 18 - Sun, Feb 22

7:03 am - 2:45 pm

PDX

ROB

48h 42m

2 stops

11:05 am - 4:50 pm

ROB

PDX

36h 45m

3 stops

$2,015Ethiopian Air

Sat, Mar 21 - Sun, Mar 29

7:00 am - 2:45 pm

PDX

ROB

48h 45m

3 stops

11:05 am - 4:50 pm

ROB

PDX

36h 45m

3 stops

$2,649Multiple Airlines

Sat, Mar 21 - Sun, Mar 29

7:00 am - 2:45 pm

PDX

ROB

48h 45m

3 stops

11:05 am - 4:50 pm

ROB

PDX

36h 45m

3 stops

$2,665Ethiopian Air

Sat, Mar 21 - Sun, Mar 29

United Airlines flights from Portland to Monrovia

Our best United Airlines deals on Portland to Monrovia flight tickets

United Airlines

Feb 18

PDX11:59 pmPortland

34h 46m

2 stops

ROB6:45 pmMonrovia Roberts Intl

Feb 22

ROB10:45 pmMonrovia Roberts Intl

45h 10m

2 stops

PDX11:55 amPortland

$1,377

United Airlines

Feb 18

PDX1:18 pmPortland

45h 27m

3 stops

ROB6:45 pmMonrovia Roberts Intl

Feb 22

ROB10:45 pmMonrovia Roberts Intl

45h 10m

2 stops

PDX11:55 amPortland

$1,382

United Airlines

Feb 18

PDX11:59 pmPortland

34h 46m

2 stops

ROB6:45 pmMonrovia Roberts Intl

Feb 22

ROB10:45 pmMonrovia Roberts Intl

29h 58m

2 stops

PDX8:43 pmPortland

$1,495

Ethiopian Air flights from Portland to Monrovia

Our best Ethiopian Air deals on Portland to Monrovia flight tickets

Ethiopian Air

Mar 21

PDX7:03 amPortland

48h 42m

2 stops

ROB2:45 pmMonrovia Roberts Intl

Mar 29

ROB11:05 amMonrovia Roberts Intl

36h 45m

3 stops

PDX4:50 pmPortland

$2,015

Ethiopian Air

Mar 21

PDX7:00 amPortland

48h 45m

3 stops

ROB2:45 pmMonrovia Roberts Intl

Mar 29

ROB11:05 amMonrovia Roberts Intl

36h 45m

3 stops

PDX4:50 pmPortland

$2,665

Fly from

Fly to

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

Wed 2/18

1:18 pm-6:45 pm

3 stops45h 27m

Monrovia Roberts Intl

Sun 2/22

10:45 pm-11:55 am

2 stops45h 10m

$1,382

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

$1,495

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Wed 2/18

1:18 pm-6:45 pm

3 stops45h 27m

Monrovia Roberts Intl

Sun 2/22

10:45 pm-8:43 pm

2 stops29h 58m

$1,500

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

$1,665

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Wed 2/18

1:18 pm-6:45 pm

3 stops45h 27m

Monrovia Roberts Intl

Sun 2/22

10:45 pm-8:43 pm

2 stops29h 58m

$1,670

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

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

$2,665

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

Fastest flight time	34h 46m
Direct flights	None

The fastest flight from Portland to Monrovia takes 34h 46m

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

Search flight deals

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 34h 46m.
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 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.

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.

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Cabin classes currently available on flights to Monrovia

First Class to Monrovia

Business Class to Monrovia

Cheap flights from Portland to Monrovia from $1,377

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 2/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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

Find the cheapest flights from Portland to Monrovia

Cheap round-trip flights

Cheap one-way flights

United Airlines flights from Portland to Monrovia

Our best United Airlines deals on Portland to Monrovia flight tickets

Ethiopian Air flights from Portland to Monrovia

Our best Ethiopian Air 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

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

Fastest flight time

Direct flights

How far is Portland to Monrovia Roberts Intl by plane?

When did momondo last update prices 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?

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

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

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

How does momondo find its flight prices?

Why use momondo?

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

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

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

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

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

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.