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$106+ Cheap flights from Miami to Ontario (MIA - 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 7/1. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Miami to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Miami (MIA) 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 June 12, 2025.

Round-trip from

$235
(Frontier)

One-way from

$106
(Trip.com)

Popular in

December

Cheapest in

August

Average price

$336
From Miami to Ontario
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One-way flight from Miami to Ontario
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Highest demand for flights based on searches. 17% potential increase in price ($81 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Miami to Ontario

Cheapest flights from Miami to Ontario
Explore the most affordable flight options available from Miami to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Frontier deal was found by Cheapflights users on 6/12. 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.
Mon 8/47:15 amMIA - ONT
1 stop16h 37mFrontier
Wed 8/137:00 amONT - MIA
1 stop19h 45mFrontier
Deal found 6/12$235
This Trip.com deal was found by Cheapflights users on 6/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/278:55 pmMIA - ONT
1 stop22h 23mMultiple Airlines
Tue 7/17:00 amONT - MIA
1 stop11h 15mMultiple Airlines
Deal found 6/11$267
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/16:15 amMIA - ONT
1 stop11h 50mSouthwest
Sat 7/57:50 amONT - MIA
1 stop9h 30mSouthwest
Deal found 6/10$277
This Delta deal was found by Cheapflights users on 6/10. 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.
Thu 8/146:40 pmMIA - ONT
1 stop8h 00mDelta
Tue 8/197:05 amONT - MIA
1 stop8h 20mDelta
Deal found 6/10$297
This United Airlines deal was found by Cheapflights users on 6/11. 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.
Thu 6/267:00 amMIA - ONT
2 stops13h 25mUnited Airlines
Mon 6/301:34 pmONT - MIA
1 stop7h 25mUnited Airlines
Deal found 6/11$331
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/16:31 pmMIA - ONT
1 stop32h 28mAlaska Airlines
Mon 10/67:25 pmONT - MIA
1 stop19h 01mAlaska Airlines
Deal found 6/10$371
This American Airlines deal was found by Cheapflights users on 6/10. 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 6/1811:23 amMIA - ONT
1 stop9h 49mAmerican Airlines
Sun 6/222:40 pmONT - MIA
1 stop7h 05mAmerican Airlines
Deal found 6/10$375

Cheapflights Fare Finder

Customize your flight search to find flights from Miami 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 June 12, 2025.
Use the filters below to find and compare flights from Miami to Ontario that are best for you.

Fly from

Miami

Fly to

Ontario

Route

Depart

Return

Price

MiamiOntario

MIA - ONT

MIAONT

Miami

Mon 8/11

7:15 am-11:53 am

1 stop7h 38m

Ontario

Mon 8/11

5:21 pm-6:30 am

1 stop10h 09m

$240

MiamiOntario

MIA - ONT

MIAONT

Miami

Fri 6/27

8:55 pm-4:18 pm

1 stop22h 23m

Ontario

Tue 7/1

7:00 am-9:15 pm

1 stop11h 15m

$267

MiamiOntario

MIA - ONT

MIAONT

Miami

Tue 7/1

6:15 am-3:05 pm

1 stop11h 50m

Ontario

Sat 7/5

7:50 am-8:20 pm

1 stop9h 30m

$277

MiamiOntario

MIA - ONT

MIAONT

Miami

Thu 8/14

6:40 pm-11:40 pm

1 stop8h 00m

Ontario

Tue 8/19

7:05 am-6:25 pm

1 stop8h 20m

$297

MiamiOntario

MIA - ONT

MIAONT

Miami

Thu 6/26

7:00 am-5:25 pm

2 stops13h 25m

Ontario

Mon 6/30

1:34 pm-11:59 pm

1 stop7h 25m

$331

MiamiOntario

MIA - ONT

MIAONT

Miami

Wed 6/18

11:23 am-6:12 pm

1 stop9h 49m

Ontario

Sun 6/22

2:40 pm-12:45 am

1 stop7h 05m

$375

MiamiOntario

MIA - ONT

MIAONT

Miami

Tue 7/1

8:55 pm-6:38 pm

1 stop24h 43m

$106

MiamiOntario

MIA - ONT

MIAONT

Miami

Fri 7/4

6:00 am-10:20 am

1 stop7h 20m

$139

MiamiOntario

MIA - ONT

MIAONT

Miami

Wed 7/2

2:06 pm-6:12 pm

1 stop7h 06m

$140

MiamiOntario

MIA - ONT

MIAONT

Miami

Thu 8/21

6:00 am-11:50 pm

1 stop20h 50m

$141

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 13 results
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Best time to book a flight from Miami to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from Miami to Ontario (average of $246). Flying from Miami 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 MIA to ONT?

Find hourly flight availability from Miami 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 June 12, 2025.

It’s typically best to fly out from Miami to Ontario in the afternoon. Doing so could potentially save you 33% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Miami to Ontario?

Use this chart to determine the cheapest time to fly round-trip from Miami to Ontario. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Miami to Ontario flight should consider departing on Tuesday mornings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 June 12, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from Miami to Ontario have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

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

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

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.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

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

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

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 Miami 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 Miami to Ontario round-trip?

    Currently priced at $235, Frontier will fly you from Miami to Ontario and back. In addition to Frontier, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Southwest and Delta - these airlines can fly you to your destination from $277 and $297, respectively. Users have found that Frontier is 38% cheaper than the other options available to this destination.

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

    The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $139. However, be on the lookout for offers from American Airlines and Frontier, as they are both options that can get you from Miami to Ontario for a low price.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Miami to Ontario (average of $246). Flying from Miami 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 Miami 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 Miami to Ontario

Discover the top 4 airlines that operate flights from Miami 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$162Average$270FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$236Average$363FlexibilityNo cancel feeOn-time71%
DeltaCheapest$253Average$416FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$336Average$444FlexibilityNo cancel feeOn-time69%

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