HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Monrovia

$1,229+ Cheap flights from Boston (BOS) 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 11/17. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — ROB
Dec 5 — Dec 121
Fri 12/5
Fri 12/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boston to Monrovia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Boston Logan Intl to Monrovia Roberts Intl are usually found in August or November, booked 41 days in advance, depart on a Tuesday or Friday and return on a Monday

Find flight deals from Boston to Monrovia

Cheapest flights from Boston to Monrovia
Explore the most affordable flight options available from Boston to Monrovia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 5, 2025.

This United Airlines deal was found by Cheapflights users on 11/3. 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.
Mon 11/175:30 amBOS - ROB
3 stops34h 45mUnited Airlines
Tue 11/2510:45 pmROB - BOS
2 stops25h 35mUnited Airlines
Deal found 11/3$1,229
This United deal was found by Cheapflights users on 11/3. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1812:00 pmBOS - ROB
3 stops28h 15mMultiple Airlines
Sun 11/2310:45 pmROB - BOS
2 stops50h 35mMultiple Airlines
Deal found 11/3$1,239
This KAYAK deal was found by Cheapflights users on 11/3. 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.
Mon 11/179:50 pmBOS - ROB
3 stops42h 25mSWISS
Wed 11/2610:45 pmROB - BOS
2 stops26h 15mSWISS
Deal found 11/3$1,254
This Gurufare deal was found by Cheapflights users on 11/3. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/195:30 amBOS - ROB
3 stops31h 20mEthiopian Air
Tue 11/2511:05 amROB - BOS
3 stops41h 37mEthiopian Air
Deal found 11/3$1,333
This KAYAK deal was found by Cheapflights users on 11/3. 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.
Sat 11/155:30 amBOS - ROB
2 stops28h 15mEthiopian Air
Tue 11/2511:05 amROB - BOS
3 stops41h 37mEthiopian Air
Deal found 11/3$1,342
This KAYAK deal was found by Cheapflights users on 11/3. 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 11/169:50 pmBOS - ROB
3 stops42h 25mSWISS
Wed 11/2610:45 pmROB - BOS
2 stops26h 15mSWISS
Deal found 11/3$1,354
This Gurufare deal was found by Cheapflights users on 11/3. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/175:30 amBOS - ROB
3 stops31h 20mEthiopian Air
Sun 11/2311:05 amROB - BOS
3 stops41h 37mEthiopian Air
Deal found 11/3$1,378
This KAYAK deal was found by Cheapflights users on 11/3. 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.
Mon 11/175:30 amBOS - ROB
3 stops31h 20mEthiopian Air
Tue 11/2511:05 amROB - BOS
3 stops41h 37mEthiopian Air
Deal found 11/3$1,380
This KAYAK deal was found by Cheapflights users on 11/3. 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.
Sat 11/155:30 amBOS - ROB
2 stops28h 15mEthiopian Air
Sun 11/2311:05 amROB - BOS
3 stops41h 37mEthiopian Air
Deal found 11/3$1,392
This oojo deal was found by Cheapflights users on 11/3. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/195:30 amBOS - ROB
3 stops31h 20mEthiopian Air
Mon 11/247:30 amROB - BOS
3 stops21h 12mEthiopian Air
Deal found 11/3$1,399
This KAYAK deal was found by Cheapflights users on 11/3. 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.
Sat 11/155:30 amBOS - ROB
2 stops28h 15mEthiopian Air
Wed 11/267:30 amROB - BOS
3 stops21h 12mEthiopian Air
Deal found 11/3$1,427

Cheap flight deals from Boston to Monrovia

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) 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 November 5, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$1,229
(United Airlines)

Popular in

December

Cheapest in

August

Average price

$1,265
Provider with most accurate pricing for Boston Logan Intl-Monrovia Roberts Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-Monrovia Roberts Intl flights.
Search Deals
From Boston Logan Intl to Monrovia Roberts Intl
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($104 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($47 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston 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 November 5, 2025.
Use the filters below to find and compare flights from Boston to Monrovia that are best for you.

Fly from

Boston

Fly to

Monrovia

Route

Depart

Return

Price

BostonMonrovia

BOS - ROB

BOSROB

Boston Logan Intl

Tue 11/18

3:10 pm-9:15 pm

3 stops25h 05m

Monrovia Roberts Intl

Tue 11/25

10:45 pm-7:20 pm

2 stops25h 35m

$1,229

BostonMonrovia

BOS - ROB

BOSROB

Boston Logan Intl

Mon 11/17

5:30 am-9:15 pm

3 stops34h 45m

Monrovia Roberts Intl

Tue 11/25

10:45 pm-7:20 pm

2 stops25h 35m

$1,229

BostonMonrovia

BOS - ROB

BOSROB

Boston Logan Intl

Tue 11/18

12:00 pm-9:15 pm

3 stops28h 15m

Monrovia Roberts Intl

Sun 11/23

10:45 pm-8:20 pm

2 stops50h 35m

$1,239

BostonMonrovia

BOS - ROB

BOSROB

Boston Logan Intl

Mon 11/17

9:50 pm-9:15 pm

3 stops42h 25m

Monrovia Roberts Intl

Wed 11/26

10:45 pm-8:00 pm

2 stops26h 15m

$1,254

BostonMonrovia

BOS - ROB

BOSROB

Boston Logan Intl

Mon 2/23

7:19 pm-9:15 pm

3 stops44h 56m

Monrovia Roberts Intl

Wed 4/1

9:10 pm-2:23 pm

2 stops45h 13m

$1,316

BostonMonrovia

BOS - ROB

BOSROB

Boston Logan Intl

Wed 11/19

5:30 am-5:50 pm

3 stops31h 20m

Monrovia Roberts Intl

Mon 11/24

7:30 am-11:42 pm

3 stops21h 12m

$1,399

BostonMonrovia

BOS - ROB

BOSROB

Boston Logan Intl

Sat 2/7

5:45 am-2:45 pm

2 stops28h 00m

Monrovia Roberts Intl

Wed 2/11

7:30 am-11:49 pm

3 stops21h 19m

$1,427

BostonMonrovia

BOS - ROB

BOSROB

Boston Logan Intl

Sat 11/15

5:30 am-5:50 pm

3 stops31h 20m

Monrovia Roberts Intl

Tue 11/25

11:05 am-11:42 pm

3 stops41h 37m

$1,431

BostonMonrovia

BOS - ROB

BOSROB

Boston Logan Intl

Mon 12/8

9:30 am-9:15 pm

3 stops30h 45m

Monrovia Roberts Intl

Sun 4/12

9:10 pm-1:09 am

2 stops31h 59m

$1,449

BostonMonrovia

BOS - ROB

BOSROB

Boston Logan Intl

Wed 11/19

5:30 am-5:50 pm

3 stops31h 20m

Monrovia Roberts Intl

Wed 11/26

7:30 am-11:42 pm

3 stops21h 12m

$1,466

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/3

Showing 1-10 of 12 results
1
2

Compare providers for flights from Boston 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 Boston to Monrovia in November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
oojoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
GurufarePrice Accuracy2 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 Boston-Monrovia flights, users find the pricing of Justfly.com to be most consistent on Cheapflights vs. Justfly.com Users can find the same prices on Boston-Monrovia flight deals on Cheapflights vs. Justfly.com >95% of the time. Price accuracy is based on data collected from Boston-Monrovia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-Monrovia flights, Cheapflights users trust Justfly.com the most. Justfly.com 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 Boston-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 Boston to Monrovia

Have a flexible travel schedule? Discover the best time to fly to Monrovia from Boston 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 Boston to Monrovia

How far ahead should I book a flight from Boston to Monrovia?

Use this chart to determine the optimal time to book a round-trip flight from Boston to Monrovia. Price data was last updated on October 31, 2025.

The best time to book flights from Boston to Monrovia is 41 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 Boston to Monrovia?

Currently, November is the cheapest month in which you can book a flight from Boston to Monrovia (average of $895). Flying from Boston to Monrovia in June is currently the most expensive (average of $1,621). 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 BOS to ROB?

Find hourly flight availability from Boston to Monrovia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 5, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 15% on flights from Boston to Monrovia by exploring options for tickets at noon.

Reviews of airlines servicing Monrovia

Get insights into the airlines that provide service to Monrovia. 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 Monrovia. Reviews last updated November 5, 2025.
Peruse reviews from past customers who have flown with United Airlines, Brussels Airlines, and Ethiopian Air from Boston to Monrovia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,001 reviews

Entertainment

7.1

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,001 reviews
United Airlines
7.4
Good
9,001 reviews

Entertainment

7.1

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Brussels Airlines
7.2
Good
369 reviews
United Airlines
7.4
Good
9,001 reviews

Entertainment

7.1

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Ethiopian Air
7.2
Good
886 reviews
United Airlines
7.4
Good
9,001 reviews

Entertainment

7.1

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Kenya Airways
6.8
Okay
286 reviews
United Airlines
7.4
Good
9,001 reviews

Entertainment

7.1

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

Related info for your journey

Find useful and relevant information for your journey from Boston 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 Boston to Monrovia?

    United Airlines and SWISS can get you from Boston to Monrovia in just under 25h 05m. Your travel time can differ by up to 17h 20m. There are 4442 mi between Boston and Monrovia. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Boston to Monrovia round-trip?

    According to our current data, Brussels Airlines ($962), United Airlines ($1,035), and Ethiopian Air ($1,304) offers the cheapest pricing from Boston to Monrovia. Brussels Airlines is 38% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Boston to Monrovia that include hotel bookings?

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

  • How can I find direct flights from Boston to Monrovia?

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

  • Can I find deals for business class flights from Boston to Monrovia?

    Yes. Cheapflights offers flight deals from Boston 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.

  • What is the cheapest month to book a flight from Boston to Monrovia?

    Currently, November is the cheapest month in which you can book a flight from Boston to Monrovia (average of $895). Flying from Boston to Monrovia in June is currently the most expensive (average of $1,621). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Search flights from Boston to Monrovia by cabin class

Find flights from Boston to Monrovia, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Top 4 airlines flying from Boston to Monrovia

Discover the top 4 airlines that operate flights from Boston to Monrovia. 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 November 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
Brussels AirlinesCheapest$962Average$1,631FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$1,035Average$1,597FlexibilityNo cancel feeOn-time69%
Ethiopian AirCheapest$1,304Average$1,624FlexibilityNo cancel feeOn-time72%
Kenya AirwaysCheapest$1,355Average$1,508FlexibilityNo cancel feeOn-time82%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.