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$119+ Cheap flights from Madison to Ontario (MSN - ONT)

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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
MSN — ONT
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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Cheap flight deals from Madison to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Madison (MSN) to Ontario (ONT). 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 July 30, 2025.

Round-trip from

$245
(FlightHub)

One-way from

$119
(Frontier)

Popular in

May

Cheapest in

March

Average price

$485
From Madison Truax Field to Ontario
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One-way flight from Madison Truax Field to Ontario
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Highest demand for flights based on searches. 14% potential increase in price ($74 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Madison to Ontario

Cheapest flights from Madison to Ontario
Explore the most affordable flight options available from Madison to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.

This FlightHub deal was found by Cheapflights users on 7/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/127:18 pmMSN - ONT
1 stop15h 51mFrontier
Wed 8/1312:59 amONT - MSN
1 stop15h 34mFrontier
Deal found 7/28$235
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Wed 11/126:00 amMSN - ONT
1 stop10h 02mAmerican Airlines
Tue 11/186:20 amONT - MSN
1 stop6h 04mAmerican Airlines
Deal found 7/28$289
This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/185:45 amMSN - ONT
1 stop7h 39mDelta
Mon 11/246:00 amONT - MSN
2 stops9h 08mDelta
Deal found 7/28$319
This United Airlines deal was found by Cheapflights users on 7/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/13:58 pmMSN - ONT
1 stop8h 33mUnited Airlines
Sat 11/85:05 amONT - MSN
1 stop6h 55mUnited Airlines
Deal found 7/28$379

Cheapflights Fare Finder

 
Customize your flight search to find flights from Madison to Ontario 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 July 30, 2025.
Use the filters below to find and compare flights from Madison to Ontario that are best for you.

Fly from

Madison

Fly to

Ontario

Route

Depart

Return

Price

MadisonOntario

MSN - ONT

MSNONT

Madison Truax Field

Tue 8/12

7:18 pm-9:09 am

1 stop15h 51m

Ontario

Wed 8/13

12:59 am-6:33 pm

1 stop15h 34m

$235

MadisonOntario

MSN - ONT

MSNONT

Madison Truax Field

Sun 8/17

7:00 pm-12:08 am

1 stop7h 08m

Ontario

Sun 9/7

2:30 pm-11:09 pm

1 stop6h 39m

$314

MadisonOntario

MSN - ONT

MSNONT

Madison Truax Field

Tue 8/26

6:30 am-12:32 pm

2 stops8h 02m

Ontario

Tue 9/2

7:00 am-4:41 pm

1 stop7h 41m

$384

MadisonOntario

MSN - ONT

MSNONT

Madison Truax Field

Fri 8/8

2:33 pm-11:42 pm

2 stops11h 09m

Ontario

Sun 8/24

11:45 am-10:48 pm

1 stop9h 03m

$424

MadisonOntario

MSN - ONT

MSNONT

Madison Truax Field

Tue 8/19

5:30 am-2:46 pm

2 stops11h 16m

Ontario

Tue 8/26

6:00 am-8:58 pm

2 stops12h 58m

$508

MadisonOntario

MSN - ONT

MSNONT

Madison Truax Field

Thu 8/21

7:59 pm-11:50 pm

1 stop5h 51m

$119

MadisonOntario

MSN - ONT

MSNONT

Madison Truax Field

Sat 9/27

10:51 am-6:06 pm

1 stop9h 15m

$258

MadisonOntario

MSN - ONT

MSNONT

Madison Truax Field

Wed 10/1

5:00 am-2:12 pm

2 stops11h 12m

$309

MadisonOntario

MSN - ONT

MSNONT

Madison Truax Field

Wed 8/6

10:50 am-7:20 pm

1 stop10h 30m

$360

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Best time to book a flight from Madison to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from Madison to Ontario (average of $246). Flying from Madison to Ontario in March is currently the most expensive (average of $328). 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 MSN to ONT?

Find hourly flight availability from Madison to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 30, 2025.

When flying from Madison to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 32% versus a flight at noon.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated July 30, 2025.
Read through reviews of airlines operating flights from Madison to Ontario, such as Alaska Airlines, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Frontier
5.9
Fair
3,237 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

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

  • What are the cheapest airlines flying from Madison to Ontario round-trip?

    Frontier, at $245, was found to be the cheapest airline from Madison to Ontario.Alternate airlines to your destination round-trip include American Airlines and United Airlines. Frontier is currently priced 43% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Madison to Ontario one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $119. However, be on the lookout for offers from United Airlines and Delta, as they are both options that can get you from Madison to Ontario for a low price.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Madison to Ontario (average of $246). Flying from Madison to Ontario in March is currently the most expensive (average of $328). 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

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Alternative routes for Madison to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Madison to Ontario

Discover the top 4 airlines that operate flights from Madison to Ontario. 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$127Average$208FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$288Average$468FlexibilityNo cancel feeOn-time71%
DeltaCheapest$294Average$493FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$313Average$493FlexibilityNo cancel feeOn-time69%

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