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$136+ Cheap flights from Portland (PDX) to Liberia (LIR)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LIR
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to Liberia are usually found in January or October, booked 43 days in advance, depart on a Sunday or Tuesday and return on a Monday

Cheap flight deals from Portland to Liberia

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Liberia (LIR). 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 July 29, 2025.

Round-trip from

$313
(Alaska Airlines)

One-way from

$136
(American Airlines)

Popular in

March

Cheapest in

January

Average price

$554
From Portland to Liberia
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One-way flight from Portland to Liberia
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Highest demand for flights based on searches. 10% potential increase in price ($75 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Portland to Liberia

Cheapest flights from Portland to Liberia
Explore the most affordable flight options available from Portland to Liberia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

This Alaska Airlines deal was found by Cheapflights users on 7/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/175:35 pmPDX - LIR
1 stop11h 45mAlaska Airlines
Thu 9/2511:20 amLIR - PDX
1 stop10h 10mAlaska Airlines
Deal found 7/27$313
This United Airlines deal was found by Cheapflights users on 7/27. 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 9/107:35 pmPDX - LIR
2 stops15h 35mUnited Airlines
Wed 9/171:20 pmLIR - PDX
2 stops20h 31mUnited Airlines
Deal found 7/27$330
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/277:39 amPDX - LIR
1 stop28h 22mAmerican Airlines
Sat 10/412:25 pmLIR - PDX
2 stops22h 30mAmerican Airlines
Deal found 7/29$345
This Delta deal was found by Cheapflights users on 7/28. 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 9/145:01 pmPDX - LIR
2 stops17h 59mDelta
Wed 9/241:25 pmLIR - PDX
2 stops20h 30mDelta
Deal found 7/28$408

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
Use the filters below to find and compare flights from Portland to Liberia that are best for you.

Fly from

Portland

Fly to

Liberia

Route

Depart

Return

Price

PortlandLiberia

PDX - LIR

PDXLIR

Portland

Wed 9/17

5:35 pm-6:20 am

1 stop11h 45m

Liberia

Thu 9/25

11:20 am-8:30 pm

1 stop10h 10m

$313

PortlandLiberia

PDX - LIR

PDXLIR

Portland

Wed 9/10

7:35 pm-12:10 pm

2 stops15h 35m

Liberia

Wed 9/17

1:20 pm-8:51 am

2 stops20h 31m

$330

PortlandLiberia

PDX - LIR

PDXLIR

Portland

Sat 9/27

7:39 am-1:01 pm

1 stop28h 22m

Liberia

Sat 10/4

12:25 pm-9:55 am

2 stops22h 30m

$345

PortlandLiberia

PDX - LIR

PDXLIR

Portland

Sun 9/14

5:01 pm-12:00 pm

2 stops17h 59m

Liberia

Wed 9/24

1:25 pm-8:55 am

2 stops20h 30m

$408

PortlandLiberia

PDX - LIR

PDXLIR

Portland

Sat 9/20

2:06 pm-11:49 am

2 stops20h 43m

$136

PortlandLiberia

PDX - LIR

PDXLIR

Portland

Wed 8/13

11:59 pm-10:00 am

1 stop9h 01m

$141

PortlandLiberia

PDX - LIR

PDXLIR

Portland

Mon 8/11

7:35 pm-6:20 am

1 stop9h 45m

$151

PortlandLiberia

PDX - LIR

PDXLIR

Portland

Mon 8/11

5:35 am-12:00 pm

2 stops29h 25m

$162

PortlandLiberia

PDX - LIR

PDXLIR

Portland

Mon 8/11

3:10 pm-3:40 pm

3 stops23h 30m

$335

PortlandLiberia

PDX - LIR

PDXLIR

Portland

Fri 11/28

12:40 am-6:58 am

2 stops28h 18m

$1,706

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Best time to book a flight from Portland to Liberia

Have a flexible travel schedule? Discover the best time to fly to Liberia 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 Liberia

How far ahead should I book a flight from Portland to Liberia?

Use this chart to determine the optimal time to book a round-trip flight from Portland to Liberia. Price data was last updated on July 25, 2025.

The best time to book flights from Portland to Liberia is 43 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Portland to Liberia?

Currently, October is the cheapest month in which you can book a flight from Portland to Liberia (average of $496). Flying from Portland to Liberia in March is currently the most expensive (average of $710). 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.

What is the cheapest time of day to fly from PDX to LIR?

Find hourly flight availability from Portland to Liberia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2025.

It’s optimal to fly from Portland to Liberia at noon. By choosing this option you can save up to 28% on the cost of your flight, compared to a flight in the morning.

Reviews of airlines servicing Liberia

Get insights into the airlines that provide service to Liberia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Liberia. Reviews last updated July 29, 2025.
Read through reviews of airlines operating flights from Portland to Liberia, such as Alaska Airlines, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,979 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
WestJet
7.2
Good
2,972 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

Find useful and relevant information for your journey from Portland to Liberia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Portland to Liberia round-trip?

    According to our current data, Alaska Airlines ($313), United Airlines ($330), and American Airlines ($345) offers the cheapest pricing from Portland to Liberia. Alaska Airlines is currently priced 49% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Portland to Liberia one-way?

    For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $136. Users have also found prices from $141 and $151 on United Airlines and Alaska Airlines, respectively.

  • Can I find deals for flights from Portland to Liberia that include hotel bookings?

    Yes. In addition to deals on Portland to Liberia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Liberia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Liberia.

  • Can I find deals for business class flights from Portland to Liberia?

    Yes. Cheapflights offers flight deals from Portland to Liberia 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 Liberia?

    Currently, October is the cheapest month in which you can book a flight from Portland to Liberia (average of $496). Flying from Portland to Liberia in March is currently the most expensive (average of $710). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Portland to Liberia

Discover the top 3 airlines that operate flights from Portland to Liberia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$409Average$649FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$421Average$615FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$429Average$593FlexibilityNo cancel feeOn-time75%

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