The cheapest times to fly from ROB to BOS are

  • March 26th to August 5th
  • December 17th to December 31st

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from ROB to BOS is early August. Prices can be as high as $5657 for Thursday flights during early to mid January, or as low as $935 for Tuesday flights around early August.


When to Fly to Boston

Flying from Monrovia (ROB) to Boston, MA (BOS) will usually cost between $935 to $5538 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early August with an average ticket price of $1256. Due to high demand the most expensive time to fly is early to mid January, with an average price of $3148. Planning your trip to low-cost times can easily save you $1892 on economy flights and even more on first-class flights. Generally, any price below $1701 can be considered a good price for a round-trip ROB to BOS flight.

See below for a graph of average weekly prices for the ROB to BOS route. All prices are for round-trip tickets in USD.

ROB to BOS Flight Prices

Compared to other flights, the ROB to BOS flight is more expensive than the average and costs less than the average flight leaving from Monrovia. The average price per mile (for a direct flight) is $0.24, which is below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to fly to BOS, and Sunday the cheapest day to fly back into ROB. Thursdays are the most expensive days to fly to Boston, and Saturdays are the most expensive days to return to Monrovia. Selecting flights on the least expensive days could save you up to $865 (29%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1761. Return trip prices are from the BOS to ROB flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from ROB to BOS can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 8 hour 59 minutes may not be realistic.


Flight Hacking ROB to BOS

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from ROB to BOS — but Champion Traveler does!

Hack #1: New York, NY (ROB > JFK > BOS)

  • Price for both tickets: $1671
  • Average savings: $30 (1.76%)

See ROB to flights


Flight Questions Answered

Still have questions about flying from ROB to BOS? We’ve got answers.

Which airlines fly this route?

You can find 17 major airlines flying this route most often: Air Canada, Air France, American, British Airways, Brussels Airlines, Delta, Finnair, Iberia, JetBlue, Kenya Airways, KLM, Lufthansa, Royal Air Maroc, South African, Tap Air Portugal, Turkish Airlines, United, and potentially more during busy seasons.

How far away is it from Logan International Airport to Monrovia Roberts International Airport?

The distance between the two airports is roughly 4444 miles or 7152 kilometers.

How long does it take to fly from ROB to BOS?

The real-world flight time for a nonstop ROB to BOS flight is about 8 hour 59 minutes.

How many flights go between Monrovia and Boston, MA?

It depends on the day of the week and the date, but a typical day might have around 6 available flights from ROB to BOS.


Airport Location Info


Departing Airport

Origination codeROB
Origination airport nameMonrovia Roberts International Airport

Return Airport

Destination codeBOS
Destination airport nameLogan International Airport
CityBoston, MA
Countrythe United States


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.