ONT - MLU

$388 Find Cheap Flights from Ontario to Monroe

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Monroe departing on 8/15. 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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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

Fri, Aug 15 - Tue, Aug 19
American Airlines Logo
11:59 pm - 9:39 amONT-MLU
7h 40m1 stop
American Airlines Logo
10:09 am - 4:06 pmMLU-ONT
7h 57m1 stop
$388American Airlines
Find Deal
Fri, Aug 15 - Tue, Aug 19
American Airlines Logo
12:22 pm - 10:28 pmONT-MLU
8h 06m2 stops
American Airlines Logo
10:09 am - 1:39 pmMLU-ONT
5h 30m1 stop
$394American Airlines
Find Deal
Fri, Aug 15 - Tue, Aug 19
American Airlines Logo
12:22 pm - 10:28 pmONT-MLU
8h 06m2 stops
American Airlines Logo
5:50 am - 11:32 amMLU-ONT
7h 42m2 stops
$399American Airlines
Find Deal
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$388
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 $388 for a round-trip ticket.

  • 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 10000 reviews
8.0Crew
6.5Food
7.5Boarding
7.2Comfort
6.9Entertainment
Airline reviews

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

4.0 OkayEthan, Jul 2025SNA - DFW
Read more American Airlines reviews

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

Delayed flight, so I switched fights to SFO to Phoenix , Phoenix to DSM. Excellent service through American Airlines

AA re-routed flight from HNL to LAX due to delay. My group of 3 with reserved seats in row 9 was broken up, with one assigned to a middle seat, another in the last row of the plane. Not happy. No explanation to the delay. No apologies. No compensation. Would have been nice to be offered an Admiral Club admission or a voucher for the extra 3 hours of layover in LAX. Could not hear the boarding gate announcements in LAX. Adjacent gate was boarding at the same time. Loud speakers were competing against each other. Barely made my boarding group.

Almost a 6 hour flight and the only food option is a cheese plate… and chips. Also how is it there are no options for texting on American. I’ll be going back to delta and united.

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

Cramped seats. FAA should make airlines have more legroom, for even short people complain

Eventless. It was a good flight and good crew. Can’t complaint.

Pitch was very small. Knees were on the seat back in front of me.

Very helpful ground crew after an earlier flight delay and being rebooked on a different flight.

The plane was late and then sat on the runway for almost 45 minutes before taking off.

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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