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Monroe

$338+ Cheap flights from Ontario to Monroe (ONT - MLU)

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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MLU
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Ontario to Monroe

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Monroe (MLU). 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 September 15, 2025.

Round-trip from

$338
(American Airlines)

Popular in

November

Cheapest in

September

Average price

$290
From Ontario to Monroe Huenefeld
Search Deals
Highest demand for flights based on searches. 27% potential increase in price ($207 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Monroe

Cheapest flights from Ontario to Monroe
Explore the most affordable flight options available from Ontario to Monroe. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This American Airlines deal was found by Cheapflights users on 9/14. 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.
Thu 10/1611:59 pmONT - MLU
1 stop7h 39mAmerican Airlines
Sat 10/186:27 pmMLU - ONT
1 stop6h 15mAmerican Airlines
Deal found 9/14$338
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Thu 10/3010:57 amONT - MLU
1 stop4h 56mAmerican Airlines
Sun 11/25:30 amMLU - ONT
1 stop6h 27mAmerican Airlines
Deal found 9/14$418
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Fri 10/3110:57 amONT - MLU
1 stop4h 56mAmerican Airlines
Sun 11/25:30 amMLU - ONT
1 stop6h 27mAmerican Airlines
Deal found 9/14$443
This American Airlines deal was found by Cheapflights users on 9/13. 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.
Sun 11/2311:59 pmONT - MLU
1 stop7h 33mAmerican Airlines
Tue 12/25:30 amMLU - ONT
1 stop8h 23mAmerican Airlines
Deal found 9/13$464
This American Airlines deal was found by Cheapflights users on 9/13. 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.
Tue 11/2512:53 pmONT - MLU
1 stop7h 23mAmerican Airlines
Tue 12/25:30 amMLU - ONT
1 stop8h 23mAmerican Airlines
Deal found 9/13$479
This American Airlines deal was found by Cheapflights users on 9/13. 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.
Mon 11/243:19 pmONT - MLU
1 stop5h 17mAmerican Airlines
Tue 12/25:30 amMLU - ONT
1 stop8h 23mAmerican Airlines
Deal found 9/13$565

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Monroe 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 September 15, 2025.
Use the filters below to find and compare flights from Ontario to Monroe that are best for you.

Fly from

Ontario

Fly to

Monroe

Route

Depart

Return

Price

OntarioMonroe

ONT - MLU

ONTMLU

Ontario

Thu 10/16

11:59 pm-9:38 am

1 stop7h 39m

Monroe Huenefeld

Sat 10/18

6:27 pm-10:42 pm

1 stop6h 15m

$338

OntarioMonroe

ONT - MLU

ONTMLU

Ontario

Thu 10/30

10:57 am-5:53 pm

1 stop4h 56m

Monroe Huenefeld

Sun 11/2

5:30 am-9:57 am

1 stop6h 27m

$418

OntarioMonroe

ONT - MLU

ONTMLU

Ontario

Fri 10/31

10:57 am-5:53 pm

1 stop4h 56m

Monroe Huenefeld

Sun 11/2

5:30 am-9:57 am

1 stop6h 27m

$443

OntarioMonroe

ONT - MLU

ONTMLU

Ontario

Sun 11/23

11:59 pm-9:32 am

1 stop7h 33m

Monroe Huenefeld

Tue 12/2

5:30 am-11:53 am

1 stop8h 23m

$464

OntarioMonroe

ONT - MLU

ONTMLU

Ontario

Tue 11/25

12:53 pm-10:16 pm

1 stop7h 23m

Monroe Huenefeld

Tue 12/2

5:30 am-11:53 am

1 stop8h 23m

$479

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Best time to book a flight from Ontario to Monroe

Have a flexible travel schedule? Discover the best time to fly to Monroe from Ontario 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 Ontario to Monroe

What is the cheapest month to book a flight from Ontario to Monroe?

Currently, February is the cheapest month in which you can book a flight from Ontario to Monroe (average of $363). Flying from Ontario to Monroe in December is currently the most expensive (average of $491). 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.

Reviews of airlines servicing Monroe

Get insights into the airlines that provide service to Monroe. 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 Monroe. Reviews last updated September 15, 2025.
Get a feel of what it's like to fly with American Airlines from Ontario to Monroe by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
10,000 reviews

Crew

8.0

Comfort

7.2

Food

6.4

Overall

7.2

Entertainment

6.9

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Crew

8.0

Comfort

7.2

Food

6.4

Overall

7.2

Entertainment

6.9

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

Related info for your journey

Find useful and relevant information for your journey from Ontario to Monroe. 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 Ontario to Monroe?

    For as low as $338, American Airlines can have you in Monroe from Ontario in 7h 39m. Airlines will cover a distance of 1475 mi.

  • What is the cheapest airline to fly from Ontario to Monroe round-trip?

    According to our current data, American Airlines ($378), offers the cheapest pricing from Ontario to Monroe.

  • Can I find deals for flights from Ontario to Monroe that include hotel bookings?

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

  • How can I find direct flights from Ontario to Monroe?

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

  • Can I find deals for business class flights from Ontario to Monroe?

    Yes. Cheapflights offers flight deals from Ontario to Monroe 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 Ontario to Monroe?

    Currently, February is the cheapest month in which you can book a flight from Ontario to Monroe (average of $363). Flying from Ontario to Monroe in December is currently the most expensive (average of $491). 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

Traveling to a place near Monroe?

Book flights to Monroe if you plan to visit one of these locations
West Monroe
Ruston

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Top airline flying from Ontario to Monroe

Discover the top airline that operate flights from Ontario to Monroe. 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$378Average$388FlexibilityNo cancel feeOn-time71%

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