HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Monrovia

$78+ Cheap flights from Seattle (SEA) to Monrovia, CA, CA

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LAX
Feb 1 — Feb 81
Sun 2/1
Sun 2/8
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle 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 Seattle/Tacoma Intl to Monrovia are usually found in January or March, booked 63 days in advance, depart on a Friday or Thursday and return on a Friday

Cheap flight deals from Seattle to Monrovia

Cheapest flights from Seattle to Monrovia
Explore the most affordable flight options available from Seattle to Monrovia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 2, 2026.

This Kiwi.com deal was found by Cheapflights users on 12/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:46 pmSEA - LAX
1 stop5h 45mFrontier
Wed 1/73:25 pmLAX - SEA
1 stop17h 39mFrontier
Deal found 12/30$388
This Kiwi.com deal was found by Cheapflights users on 12/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:46 pmSEA - LAX
1 stop5h 45mMultiple Airlines
Mon 1/59:20 pmLAX - SEA
1 stop20h 31mMultiple Airlines
Deal found 12/30$405
This Frontier deal was found by Cheapflights users on 12/31. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:25 pmSEA - LAX
1 stop11h 05mFrontier
Fri 1/29:15 amLAX - SEA
1 stop9h 38mFrontier
Deal found 12/31$422
This Kiwi.com deal was found by Cheapflights users on 12/31. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amSEA - LAX
Nonstop2h 46mFrontier
Sat 1/39:36 pmLAX - SEA
Nonstop3h 06mFrontier
Deal found 12/31$433
This Kiwi.com deal was found by Cheapflights users on 12/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amSEA - LAX
Nonstop2h 46mFrontier
Sun 1/49:36 pmLAX - SEA
Nonstop3h 06mFrontier
Deal found 12/30$434
This Kiwi.com deal was found by Cheapflights users on 12/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:46 pmSEA - LAX
1 stop5h 45mFrontier
Mon 1/59:36 pmLAX - SEA
Nonstop3h 06mFrontier
Deal found 12/30$462

Find flight deals from Seattle to Monrovia

Keep the following information in mind while searching for Seattle to Monrovia flight deals. Data was last updated January 2, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$120
(Kiwi.com)

One-way from

$78
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$153
Provider with most accurate pricing for Seattle/Tacoma Intl-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Los Angeles flights.
Search Deals
From Seattle/Tacoma Intl to Monrovia
Search Deals
One-way flight from Seattle/Tacoma Intl to Monrovia
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle 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 January 2, 2026.
Use the filters below to find and compare flights from Seattle to Monrovia that are best for you.

Fly from

Seattle

Fly to

Monrovia

Route

Depart

Return

Price

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Mon 1/19

5:43 pm-8:31 pm

Nonstop2h 48m

Los Angeles

Thu 1/22

5:13 pm-8:10 pm

Nonstop2h 57m

$123

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 1/28

6:20 am-9:02 am

Nonstop2h 42m

Los Angeles

Wed 2/4

8:00 am-11:01 am

Nonstop3h 01m

$137

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 1/24

5:12 pm-8:11 pm

Nonstop2h 59m

Los Angeles

Tue 2/3

4:15 pm-9:12 pm

1 stop4h 57m

$142

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Mon 2/2

2:02 pm-4:38 pm

Nonstop2h 36m

Los Angeles

Sat 2/7

7:20 am-10:17 am

Nonstop2h 57m

$147

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sat 1/24

12:54 pm-9:52 am

1 stop20h 58m

Los Angeles

Thu 1/29

6:30 am-11:19 am

1 stop28h 49m

$147

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 1/21

5:40 pm-8:20 pm

Nonstop2h 40m

Los Angeles

Sun 1/25

8:22 pm-11:22 pm

Nonstop3h 00m

$147

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Mon 1/26

8:50 pm-9:02 am

1 stop12h 12m

Los Angeles

Tue 1/27

11:20 am-2:19 pm

Nonstop2h 59m

$147

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Mon 2/9

9:55 am-12:40 pm

Nonstop2h 45m

Los Angeles

Sat 2/14

3:55 pm-6:49 pm

Nonstop2h 54m

$147

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Wed 1/28

11:20 am-3:15 pm

1 stop3h 55m

Los Angeles

Sat 1/31

8:25 am-12:40 pm

1 stop4h 15m

$148

SeattleLos Angeles

SEA - LAX

SEALAX

Seattle/Tacoma Intl

Sun 1/18

9:00 am-11:59 am

Nonstop2h 59m

Los Angeles

Thu 1/22

4:15 pm-9:12 pm

1 stop4h 57m

$148

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/1

Showing 1-10 of 24 results
1
2
3

Best time to book a flight from Seattle to Monrovia

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

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Monrovia. Price data was last updated on December 26, 2025.

Booking 63 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Monrovia. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from Seattle to Monrovia (average of $38). Flying from Seattle to Monrovia in July is currently the most expensive (average of $119). 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 SEA to MR9?

Find hourly flight availability from Seattle 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 January 2, 2026.

It’s optimal to fly from Seattle to Monrovia in the evening. By choosing this option you can save up to 6% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from Seattle to Monrovia?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Monrovia. Price data was last updated on December 27, 2025.

Travelers seeking maximum savings on their Seattle to Monrovia flight should consider departing on Sunday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Seattle to Monrovia

Explore weekly flight availability from Seattle to Monrovia. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated January 2, 2026.

The most flights from SEA to MR9 are scheduled on a Thursday (98 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (14 on average).

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 January 2, 2026.
See what other customers who have flown with Alaska Airlines, Delta, and United Airlines from Seattle to Monrovia have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,599 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
8.0
Very good
11,599 reviews
Alaska Airlines
8.0
Very good
11,599 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Delta
7.9
Good
8,021 reviews
Alaska Airlines
8.0
Very good
11,599 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
United Airlines
7.4
Good
9,134 reviews
Alaska Airlines
8.0
Very good
11,599 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Spirit Airlines
6.3
Okay
8,258 reviews
Alaska Airlines
8.0
Very good
11,599 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Frontier
5.7
Fair
3,068 reviews
Alaska Airlines
8.0
Very good
11,599 reviews

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

Related info for your journey

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

  • What airport do you fly from for flights from Seattle to Monrovia?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Monrovia. 8 airlines have flights from Seattle/Tacoma Intl to Monrovia on a regular basis. Booking flights from Seattle/Tacoma Intl to Monrovia should not be difficult; the airport handles an average of 57 outbound flights to Monrovia per day.

  • How popular is this Seattle to Monrovia flight route?

    Flights from Seattle/Tacoma Intl to Monrovia have been viewed 303 times in the past calendar month.

  • How long is the flight from Seattle to Monrovia?

    For as low as $137, Frontier can have you in Monrovia from Seattle in 2h 42m. The distance from Seattle to Monrovia is about 954 mi. Generally, flights for this route are nonstop.

  • What are the cheapest airlines to fly from Seattle to Monrovia one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $37. However, be on the lookout for offers from Spirit Airlines and Southwest, as they are both options that can get you from Seattle to Monrovia for a low price.

  • What are the most reliable airlines from Seattle to Monrovia?

    Before booking your flight to Monrovia from Seattle, check out the most reliable airlines to get you to your destination on time: SAUDIA (100%), Horizon Air (100%), ITA Airways( 100%).

  • What are the cheapest flights from Seattle to Monrovia?

    The cheapest flight price from Seattle to Monrovia is $72. On average you can expect to pay $678. The most popular route, (Seattle/Tacoma Intl - Los Angeles), can usually be booked for $56.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle 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 Seattle to Monrovia?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Monrovia (average of $38). Flying from Seattle to Monrovia in July is currently the most expensive (average of $119). 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.

Alternative routes for Seattle to Monrovia

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Los Angeles flights
Seattle to Las Vegas flights
Seattle to San Diego flights
Portland to Las Vegas flights
Portland to Los Angeles flights
Seattle to Ontario flights
Seattle to San Francisco flights
Seattle to Santa Ana flights
Seattle to Palm Springs flights
Everett to San Diego flights
Everett to Los Angeles flights
Everett to Las Vegas flights
Seattle to San Jose flights
Seattle to Burbank flights
Everett to San Francisco flights
Portland to San Francisco flights
Portland to Palm Springs flights
Portland to San Diego flights
Portland to Ontario flights
Everett to Santa Ana flights
Seattle to Oakland flights
Seattle to Long Beach flights
Seattle to Sacramento flights
Portland to Santa Ana flights
Spokane to Las Vegas flights
Seattle to Reno flights
Portland to Oakland flights
Spokane to San Diego flights
Spokane to Los Angeles flights
Seattle to San Luis Obispo flights
Portland to San Jose flights
Portland to Sacramento flights
Portland to Long Beach flights
Portland to Burbank flights
Spokane to San Francisco flights
Portland to Reno flights
Pasco to Las Vegas flights
Pasco to Los Angeles flights
Seattle to Fresno flights
Seattle to Monterey flights
Seattle to Santa Barbara flights
Spokane to Santa Ana flights
Spokane to Palm Springs flights
Pasco to San Francisco flights
Spokane to Ontario flights
Seattle to Santa Rosa flights
Spokane to San Jose flights
Portland to Santa Barbara flights
Portland to Fresno flights
Pasco to Ontario flights

Top 8 airlines flying from Seattle to Monrovia

Discover the top 8 airlines that operate flights from Seattle 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 January 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$53Average$162FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$73Average$153FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$98Average$262FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$113Average$241FlexibilityNo cancel feeOn-time63%
DeltaCheapest$118Average$246FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$147Average$298FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$163Average$253FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$176Average$400FlexibilityNo cancel feeOn-time71%

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.