ONT - MLU

$381 Find Cheap Flights from Ontario to Monroe

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Monroe departing on 10/29. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Monroe

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Monroe, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Monroe, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Ontario to Monroe (ONT-MLU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Monroe that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Monroe

Wed, Oct 29 - Sun, Nov 2
American Airlines Logo
2:51 pm - 10:46 pmONT-MLU
5h 55m1 stop
American Airlines Logo
5:30 am - 9:57 amMLU-ONT
6h 27m1 stop
$388American Airlines
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Wed, Oct 29 - Sun, Nov 2
American Airlines Logo
6:15 am - 5:57 pmONT-MLU
9h 42m2 stops
American Airlines Logo
5:30 am - 9:57 amMLU-ONT
6h 27m1 stop
$471American Airlines
Find Deal
Wed, Mar 25 - Sat, Mar 28
Delta Logo
1:00 pm - 10:14 pmONT-MLU
7h 14m1 stop
Delta Logo
6:02 am - 11:38 amMLU-ONT
7h 36m1 stop
$506Delta
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Wed, Mar 25 - Sat, Mar 28
Delta Logo
1:00 pm - 10:14 pmONT-MLU
7h 14m1 stop
Delta Logo
6:02 am - 11:38 amMLU-ONT
7h 36m1 stop
$537Delta
Find Deal
Wed, Mar 25 - Sat, Mar 28
American Airlines Logo
3:09 pm - 9:54 pmONT-MLU
4h 45m1 stop
American Airlines Logo
10:10 am - 5:52 pmMLU-ONT
9h 42m2 stops
$616American Airlines
Find Deal
Wed, Mar 25 - Sat, Mar 28
American Airlines Logo
10:30 am - 9:54 pmONT-MLU
9h 24m2 stops
American Airlines Logo
10:10 am - 5:52 pmMLU-ONT
9h 42m2 stops
$656American Airlines
Find Deal
Wed, Oct 29 - Sun, Nov 2
Delta Logo
6:00 am - 5:13 pmONT-MLU
9h 13m2 stops
Delta Logo
5:03 am - 2:53 pmMLU-ONT
11h 50m2 stops
$659Delta
Find Deal

Everything you should know

Top airlines
American Airlines
Cheapest • from $388 (round-trip)
American Airlines
Best reviews • 7.2 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$388
American Airlines
Wed 10/29Sun 11/2
ONT - MLU • 1 stop
Cheapest one-way
$381
American Airlines
Wed 10/29
ONT - MLU • 1 stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Monroe!
Booking Insights

KAYAK's insights & trends for Ontario to Monroe flights

Get data-powered insights and trends into flights from Ontario to Monroe to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Ontario to Monroe?

The average price of all round-trip flights from Ontario to Monroe clicked on KAYAK for each day over the last 12 months.

For Ontario to Monroe, Sunday is the cheapest day to fly on average and Thursday is the most expensive. Flying from Monroe back to Ontario, the best deals are generally found on Friday, with Wednesday being the most expensive.

Find deals

Good to know

Cheapest flight$381
Flight from Ontario to Monroe

When to book flights from Ontario to Monroe

Are your dates flexible? Find out the best times to travel from Ontario to Monroe based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Monroe

  • What is the cheapest flight from Ontario to Monroe?

    In the last 3 days, the lowest price for a flight from Ontario to Monroe was $381 for a one-way ticket and $388 for a round-trip.

  • Do I need a passport to fly between Ontario and Monroe?

    A passport is not required to fly from Ontario to Monroe.

  • Which aircraft models fly most regularly from Ontario to Monroe?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Monroe?

    oneworld is the only airline alliance operating flights between Ontario and Monroe.

  • How does KAYAK find such low prices on flights from Ontario to Monroe?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Monroe.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Monroe?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Monroe from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Monroe?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Monroe with an airline and back to Ontario with another airline. Booking your flights between Ontario and MLU can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Monroe?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Monroe from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Ontario to Monroe

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Monroe. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Monroe? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
American AirlinesOverall score based on 11045 reviews
8.0Crew
7.2Comfort
7.5Boarding
6.9Entertainment
6.4Food
Airline reviews

Always seated jammed in rear of aircraft Admirals Club food at DFW terminal D was absolute worst food experience and I pay $600/year to eat this dried out junk

4.0 OkayCraig, Oct 2025MRY - DFW
Read more American Airlines reviews

Always seated jammed in rear of aircraft Admirals Club food at DFW terminal D was absolute worst food experience and I pay $600/year to eat this dried out junk

Mostly good. Flight was crowded but Airline personnel were very friendly & accommodating. It would be good to have savory snacks rather than just sweet Biscoff cookies.

It was a red eye flight, so no meals were provided, but it was fine with snacks. The seats felt cramped and almost too narrow.

Very crowded flight but what can you expect these days?? Crew was accommodating.

The seats in economy were appeared to be quite thin and lack sufficient cushioning to be comfortable. Perhaps it was my seating position but the plane seemed notably load.

The entertainment package was vast and the selections were very current. Keep updating it was great.

The seat was so hard my tailbone was aching The crew was kind of a b**** because I made a joke that I didn't care if they close the door I total c*** when she was trying to f****** act like she was mad at me because I said that The flight was bumpy. Sure you didnt have control over that.

4 hours late, including over +1 hour waiting in plane to take off. Baggage left behind too.

While waiting to claim my checked luggage, I discovered the airline had lost it. After a long wait and inquiries, I discovered it was on another flight. Fortunately, the airline finally sent my luggage home.

Was not able to watch most shows on the entertainment site. They would not load

Everything you need to know for your flight from Ontario to Monroe

Information on your arrival and departure airports

Ontario (ONT)
Monroe (MLU)

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