The cheapest times to fly from SEA to ROB are

  • January 1st to March 25th
  • September 10th to December 9th

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 SEA to ROB is early November. Prices can be as high as $8659 for Sunday flights during mid December, or as low as $1902 for Wednesday flights around early November.


When to Fly to Monrovia

Flying from Seattle, WA (SEA) to Monrovia (ROB) will usually cost between $1908 to $7317 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early November with an average ticket price of $2415. Due to high demand the most expensive time to fly is mid December, with an average price of $4530. Planning your trip to low-cost times can easily save you $2115 on economy flights and even more on first-class flights. Generally, any price below $2756 can be considered a good price for a round-trip SEA to ROB flight.

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

SEA to ROB Flight Prices

Compared to other flights, the SEA to ROB flight is more expensive than the average and costs more than the average flight leaving from Seattle. The average price per mile (for a direct flight) is $0.25, which is below average.


Flight Prices by Day of the Week

Wednesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly to Monrovia, and Thursdays are the most expensive days to return to Seattle. Selecting flights on the least expensive days could save you up to $6586 (50%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Wednesday and returning a week later will cost an average of $2312. Return trip prices are from the ROB to SEA 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 SEA to ROB can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 13 hour 24 minutes may not be realistic.


Flight Hacking SEA to ROB

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 SEA to ROB — but Champion Traveler does!

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

  • Price for both tickets: $1717
  • Average savings: $1039 (37.69%)

See SEA to JFK flights

Hack #2: Boston, MA (SEA > BOS > ROB)

  • Price for both tickets: $1726
  • Average savings: $1030 (37.36%)

See SEA to BOS flights

Hack #3: Chicago, IL (SEA > ORD > ROB)

  • Price for both tickets: $1761
  • Average savings: $995 (36.09%)

See SEA to ORD flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 16 major airlines flying this route most often: Air Canada, Air France, American, British Airways, Brussels Airlines, Delta, Ethiopian, Finnair, Iberia, Kenya Airways, KLM, Lufthansa, Royal Air Maroc, Singapore Airlines, South African, United, and potentially more during busy seasons.

How far away is it from Monrovia Roberts International Airport to Seattle/Tacoma International Airport?

The distance between the two airports is roughly 6898 miles or 11101 kilometers.

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

The real-world flight time for a nonstop SEA to ROB flight is about 13 hour 24 minutes.

How many flights go between Seattle, WA and Monrovia?

It depends on the day of the week and the date, but a typical day might have around 8 available flights from SEA to ROB.


Airport Location Info


Departing Airport

Origination codeSEA
Origination airport nameSeattle/Tacoma International Airport
CitySeattle, WA
Countrythe United States

Return Airport

Destination codeROB
Destination airport nameMonrovia Roberts International Airport


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.