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$95+ 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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — ONT
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
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 septiembre 11, 2025.

Round-trip from

$158
(Gotogate)

One-way from

$95
(Southwest)

Popular in

December

Cheapest in

September

Average price

$286
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. 13% potential increase in price ($58 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($20 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 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 septiembre 11, 2025.

This Gotogate deal was found by Cheapflights users on 9/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/268:00 amMIA - ONT
1 stop13h 35mFrontier
jue. 10/212:28 pmONT - MIA
1 stop23h 03mFrontier
Deal found 9/10$158
This CheapOair deal was found by Cheapflights users on 9/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/57:06 pmMIA - ONT
1 stop14h 36mFrontier
vie. 11/71:46 pmONT - MIA
1 stop21h 37mFrontier
Deal found 9/11$160
This CheapOair deal was found by Cheapflights users on 9/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/26:00 amMIA - ONT
1 stop16h 54mFrontier
jue. 10/1612:32 pmONT - MIA
1 stop23h 06mFrontier
Deal found 9/10$161
This CheapOair deal was found by Cheapflights users on 9/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/256:00 amMIA - ONT
1 stop28h 53mFrontier
mar. 9/308:59 pmONT - MIA
1 stop24h 45mFrontier
Deal found 9/10$163
This CheapOair deal was found by Cheapflights users on 9/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/186:00 amMIA - ONT
1 stop28h 53mFrontier
jue. 9/2512:28 pmONT - MIA
1 stop23h 03mFrontier
Deal found 9/10$177
This Flightnetwork deal was found by Cheapflights users on 9/10. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/186:00 amMIA - ONT
1 stop16h 54mFrontier
vie. 9/2612:28 pmONT - MIA
1 stop23h 08mFrontier
Deal found 9/10$178
This CheapOair deal was found by Cheapflights users on 9/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/198:00 amMIA - ONT
1 stop13h 35mFrontier
mié. 9/248:59 pmONT - MIA
1 stop24h 45mFrontier
Deal found 9/10$180
This CheapOair deal was found by Cheapflights users on 9/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/256:00 amMIA - ONT
1 stop16h 54mFrontier
dom. 9/287:15 pmONT - MIA
1 stop20h 42mFrontier
Deal found 9/10$183
This CheapOair deal was found by Cheapflights users on 9/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/186:00 amMIA - ONT
1 stop30h 35mFrontier
sáb. 10/257:04 amONT - MIA
1 stop20h 15mFrontier
Deal found 9/10$185
This CheapOair deal was found by Cheapflights users on 9/9. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/96:00 amMIA - ONT
1 stop20h 50mFrontier
dom. 10/1212:49 pmONT - MIA
1 stop22h 49mFrontier
Deal found 9/9$188
This CheapOair deal was found by Cheapflights users on 9/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/166:00 amMIA - ONT
1 stop20h 50mFrontier
sáb. 10/187:04 amONT - MIA
1 stop20h 15mFrontier
Deal found 9/10$194

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 septiembre 11, 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

jue. 9/18

6:00 am-7:53 am

1 stop28h 53m

Ontario

jue. 9/25

12:28 pm-2:31 pm

1 stop23h 03m

$177

MiamiOntario

MIA - ONT

MIAONT

Miami

jue. 9/25

6:00 am-7:53 am

1 stop28h 53m

Ontario

dom. 9/28

7:15 pm-6:57 pm

1 stop20h 42m

$183

MiamiOntario

MIA - ONT

MIAONT

Miami

jue. 9/18

6:00 am-7:53 am

1 stop28h 53m

Ontario

dom. 9/21

12:28 pm-2:31 pm

1 stop23h 03m

$216

MiamiOntario

MIA - ONT

MIAONT

Miami

lun. 10/6

6:00 am-10:13 pm

1 stop19h 13m

Ontario

lun. 10/13

8:34 am-12:50 am

1 stop13h 16m

$233

MiamiOntario

MIA - ONT

MIAONT

Miami

sáb. 10/18

6:00 am-10:26 am

1 stop7h 26m

Ontario

sáb. 10/25

11:36 am-12:29 am

1 stop9h 53m

$257

MiamiOntario

MIA - ONT

MIAONT

Miami

vie. 9/19

7:39 pm-7:54 pm

2 stops27h 15m

Ontario

dom. 9/21

7:15 pm-6:57 pm

1 stop20h 42m

$282

MiamiOntario

MIA - ONT

MIAONT

Miami

mié. 10/1

6:00 am-10:42 am

1 stop7h 42m

Ontario

dom. 10/5

10:00 pm-9:35 am

1 stop8h 35m

$287

MiamiOntario

MIA - ONT

MIAONT

Miami

mié. 10/1

6:00 am-10:42 am

1 stop7h 42m

Ontario

sáb. 10/4

11:55 am-12:23 am

1 stop9h 28m

$287

MiamiOntario

MIA - ONT

MIAONT

Miami

sáb. 9/27

5:36 pm-10:41 pm

1 stop8h 05m

Ontario

mar. 9/30

11:55 am-12:23 am

1 stop9h 28m

$292

MiamiOntario

MIA - ONT

MIAONT

Miami

sáb. 10/18

10:00 am-11:50 pm

2 stops16h 50m

Ontario

sáb. 10/25

7:04 am-6:19 am

1 stop20h 15m

$294

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 21 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 septiembre 11, 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.

How much does it cost to fly round-trip from Miami to Ontario?

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 septiembre 11, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American Airlines from Miami to Ontario. 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.
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Frontier
5.8
Fair
3,177 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

  • How long is the flight from Miami to Ontario?

    Frontier can get you from Miami to Ontario in just under 28h 53m. Your travel time can differ by up to . Airlines will cover a distance of 2291 mi.

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

    Currently priced at $170, 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 Delta and American Airlines - these airlines can fly you to your destination from $253 and $317, respectively. Users have found that Frontier is 55% cheaper than the other options available to this destination.

  • 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 septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$170Average$280FlexibilityNo cancel feeOn-time62%
DeltaCheapest$253Average$444FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$317Average$404FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$336Average$456FlexibilityNo cancel feeOn-time69%

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