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Cheap flights from Portland to Liberia from $1,308

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 Liberia departing on 2/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
10:56 am - 9:15 pm
PDX
-
ROB
26h 19m3 stops
United Airlines Logo
10:45 pm - 8:43 pm
ROB
-
PDX
29h 58m2 stops
$1,308United Airlines
Fri, Feb 20 - Tue, Feb 24
Multiple Airlines Logo
7:00 am - 2:45 pm
PDX
-
ROB
47h 45m2 stops
Multiple Airlines Logo
7:30 am - 7:52 pm
ROB
-
PDX
43h 22m3 stops
$2,680Multiple Airlines
Sat, Feb 14 - Fri, Mar 27
Multiple Airlines Logo
7:05 am - 2:45 pm
PDX
-
ROB
47h 40m3 stops
Multiple Airlines Logo
7:30 am - 7:52 pm
ROB
-
PDX
43h 22m3 stops
$2,828Multiple Airlines
Sat, Feb 14 - Fri, Mar 27
United Airlines Logo
11:59 pm - 6:45 pm
PDX
-
ROB
34h 46m2 stops
United Airlines Logo
10:45 pm - 6:49 pm
ROB
-
PDX
28h 04m2 stops
$3,546United Airlines
Wed, Feb 25 - Sun, Mar 1
United Airlines Logo
11:59 pm - 6:45 pm
PDX
-
ROB
34h 46m2 stops
United Airlines Logo
10:45 pm - 11:55 am
ROB
-
PDX
45h 10m2 stops
$3,557United Airlines
Wed, Feb 25 - Sun, Mar 1
United Airlines Logo
1:18 pm - 6:45 pm
PDX
-
ROB
45h 27m3 stops
United Airlines Logo
10:45 pm - 6:49 pm
ROB
-
PDX
28h 04m2 stops
$4,087United Airlines
Wed, Feb 25 - Sun, Mar 1
United Airlines Logo
1:18 pm - 6:45 pm
PDX
-
ROB
45h 27m3 stops
United Airlines Logo
10:45 pm - 11:55 am
ROB
-
PDX
45h 10m2 stops
$4,098United Airlines
Wed, Feb 25 - Sun, Mar 1

United Airlines flights from Portland to Liberia

Our best United Airlines deals on Portland to Liberia flight tickets
United Airlines
Feb 20
PDX10:56 amPortland
26h 19m
3 stops
ROB9:15 pmMonrovia Roberts Intl
Feb 24
ROB10:45 pmMonrovia Roberts Intl
29h 58m
2 stops
PDX8:43 pmPortland
$1,308
Find similar
United Airlines
Feb 25
PDX11:59 pmPortland
34h 46m
2 stops
ROB6:45 pmMonrovia Roberts Intl
Mar 1
ROB10:45 pmMonrovia Roberts Intl
28h 04m
2 stops
PDX6:49 pmPortland
$3,546
Find similar
United Airlines
Feb 25
PDX11:59 pmPortland
34h 46m
2 stops
ROB6:45 pmMonrovia Roberts Intl
Mar 1
ROB10:45 pmMonrovia Roberts Intl
45h 10m
2 stops
PDX11:55 amPortland
$3,557
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Portland to Liberia 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, momondo users made 832,500 searches. Data last updated December 7, 2025.
Use the filters below to find and compare flights from Portland to Liberia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Fri 2/20

10:56 am-9:15 pm

3 stops26h 19m

Monrovia Roberts Intl

Tue 2/24

10:45 pm-8:43 pm

2 stops29h 58m

$1,308

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Sat 2/14

7:00 am-2:45 pm

2 stops47h 45m

Monrovia Roberts Intl

Fri 3/27

7:30 am-7:52 pm

3 stops43h 22m

$2,680

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Sat 2/14

7:05 am-2:45 pm

3 stops47h 40m

Monrovia Roberts Intl

Fri 3/27

7:30 am-7:52 pm

3 stops43h 22m

$2,828

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Wed 2/25

11:59 pm-6:45 pm

2 stops34h 46m

Monrovia Roberts Intl

Sun 3/1

10:45 pm-6:49 pm

2 stops28h 04m

$3,546

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Wed 2/25

11:59 pm-6:45 pm

2 stops34h 46m

Monrovia Roberts Intl

Sun 3/1

10:45 pm-11:55 am

2 stops45h 10m

$3,557

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Wed 2/25

1:18 pm-6:45 pm

3 stops45h 27m

Monrovia Roberts Intl

Sun 3/1

10:45 pm-6:49 pm

2 stops28h 04m

$4,087

PortlandMonrovia

PDX - ROB

PDXROB

Portland

Wed 2/25

1:18 pm-6:45 pm

3 stops45h 27m

Monrovia Roberts Intl

Sun 3/1

10:45 pm-11:55 am

2 stops45h 10m

$4,098

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Liberia from

How to get the cheapest flight ticket from Portland to Liberia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Liberia?

On average, the least expensive day to fly to Liberia from Portland is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $1,726. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Portland to Liberia for around $3,660.

What is the cheapest time of day to depart on your flight to Liberia?

In the morning is the cheapest time of day to fly from Portland to Liberia when you can find flight prices for as low as $1,890. Flying to Liberia in the morning is an ideal time because this is during off-peak travel hours. Flights to Liberia are more costly in the evening, with an average ticket price of $2,068. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

Cheap Portland to Liberia flight deals and tips

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

Fastest flight time

47h 45m

Direct flights

None
The fastest flight from Portland to Liberia takes 47h 45m
There are no direct flights from Portland to Liberia. There are no popular flight routes from Portland to Liberia.
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  • When did momondo last update prices for flights from Portland Airport to Liberia?

    Prices for flights from Portland Airport to Liberia are refreshed on a daily basis.

  • How old do you have to be to fly from Portland Airport to Liberia?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to Liberia.

  • What documentation or ID do you need to fly to Liberia?

    The travel and health documents you'll need for your trip to Liberia may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Liberia. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Portland to Liberia. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. All flights to Liberia from Portland on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search for Portland to Liberia flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from Portland to Liberia now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Liberia and let you know when they change.

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