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$63+ 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 2/5. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — ONT
nov. 26 — dic. 31
mié. 11/26
mié. 12/3
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 octubre 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$130
(CheapOair)

One-way from

$63
(Trip.com)

Popular in

December

Cheapest in

November

Average price

$376
Provider with most accurate pricing for Miami-Ontario flight deals.
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Provider most trusted by Cheapflights users for Miami-Ontario flights.
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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. 5% potential increase in price ($24 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in October 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 octubre 27, 2025.

This Frontier deal was found by Cheapflights users on 10/25. 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.
jue. 11/136:00 amMIA - ONT
1 stop8h 10mFrontier
lun. 11/177:54 amONT - MIA
1 stop12h 46mFrontier
Deal found 10/25$130
This Booking.com deal was found by Cheapflights users on 10/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/136:00 amMIA - ONT
1 stop8h 10mFrontier
jue. 11/131:46 pmONT - MIA
1 stop21h 44mFrontier
Deal found 10/25$131
This CheapOair deal was found by Cheapflights users on 10/25. 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. 11/86:00 amMIA - ONT
1 stop20h 50mFrontier
sáb. 11/1512:05 pmONT - MIA
1 stop15h 14mFrontier
Deal found 10/25$150
This CheapOair deal was found by Cheapflights users on 10/26. 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. 12/116:00 amMIA - ONT
1 stop8h 09mFrontier
lun. 12/153:20 pmONT - MIA
1 stop10h 59mFrontier
Deal found 10/26$170
This Kiwi.com deal was found by Cheapflights users on 10/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/148:00 amMIA - ONT
1 stop13h 49mFrontier
dom. 11/161:46 pmONT - MIA
1 stop21h 44mFrontier
Deal found 10/25$174
This CheapOair deal was found by Cheapflights users on 10/25. 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. 11/66:00 amMIA - ONT
1 stop8h 10mFrontier
sáb. 11/86:53 amONT - MIA
1 stop20h 26mFrontier
Deal found 10/25$196
This Frontier deal was found by Cheapflights users on 10/24. 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.
sáb. 11/16:00 amMIA - ONT
1 stop20h 50mFrontier
sáb. 11/812:05 pmONT - MIA
1 stop15h 14mFrontier
Deal found 10/24$197
This CheapOair deal was found by Cheapflights users on 10/26. 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.
lun. 11/108:00 amMIA - ONT
1 stop13h 39mFrontier
mié. 11/128:45 amONT - MIA
1 stop18h 34mFrontier
Deal found 10/26$206
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/1412:05 pmMIA - ONT
2 stops26h 05mMultiple Airlines
dom. 11/167:22 amONT - MIA
1 stop13h 18mMultiple Airlines
Deal found 10/26$209
This Frontier deal was found by Cheapflights users on 10/25. 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.
sáb. 11/156:00 amMIA - ONT
1 stop8h 10mFrontier
lun. 11/247:06 pmONT - MIA
1 stop7h 04mFrontier
Deal found 10/25$212

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 octubre 27, 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

mié. 2/11

6:25 am-10:39 pm

1 stop19h 14m

Ontario

mié. 2/25

7:00 am-5:19 am

1 stop19h 19m

$262

MiamiOntario

MIA - ONT

MIAONT

Miami

dom. 11/9

3:25 pm-7:29 am

1 stop19h 04m

Ontario

dom. 11/16

1:46 pm-2:30 pm

1 stop21h 44m

$266

MiamiOntario

MIA - ONT

MIAONT

Miami

mié. 12/3

5:00 pm-12:46 pm

1 stop22h 46m

Ontario

mar. 12/9

7:10 am-4:00 pm

1 stop29h 50m

$326

MiamiOntario

MIA - ONT

MIAONT

Miami

jue. 11/27

2:07 pm-7:42 pm

1 stop8h 35m

Ontario

lun. 12/1

10:25 pm-9:27 am

1 stop8h 02m

$327

MiamiOntario

MIA - ONT

MIAONT

Miami

mié. 12/3

6:30 pm-11:04 pm

1 stop7h 34m

Ontario

dom. 12/14

10:25 pm-9:27 am

1 stop8h 02m

$327

MiamiOntario

MIA - ONT

MIAONT

Miami

jue. 12/4

4:55 pm-11:04 pm

1 stop9h 09m

Ontario

jue. 12/11

12:12 pm-12:46 am

1 stop9h 34m

$327

MiamiOntario

MIA - ONT

MIAONT

Miami

jue. 1/29

6:00 am-11:54 am

1 stop8h 54m

Ontario

lun. 2/2

10:30 pm-9:24 am

1 stop7h 54m

$327

MiamiOntario

MIA - ONT

MIAONT

Miami

sáb. 12/6

6:00 am-11:02 am

1 stop8h 02m

Ontario

jue. 12/11

12:12 pm-12:46 am

1 stop9h 34m

$327

MiamiOntario

MIA - ONT

MIAONT

Miami

jue. 1/15

6:45 am-12:16 pm

1 stop8h 31m

Ontario

lun. 1/19

10:30 pm-9:24 am

1 stop7h 54m

$327

MiamiOntario

MIA - ONT

MIAONT

Miami

jue. 12/4

12:36 pm-7:39 pm

1 stop10h 03m

Ontario

sáb. 12/13

4:49 pm-6:24 am

1 stop10h 35m

$327

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 20 results
1
2

Compare providers for flights from Miami to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Miami to Ontario in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Miami-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Miami-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Miami-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Miami-Ontario flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Miami-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, January is the cheapest month in which you can book a flight from Miami to Ontario (average of $103). Flying from Miami to Ontario in July is currently the most expensive (average of $164). 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 octubre 27, 2025.

It’s typically best to fly out from Miami to Ontario in the afternoon. Doing so could potentially save you 32% on the flight price compared to flying at noon, which is usually more expensive.

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 octubre 27, 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
7.9
Good
7,996 reviews

Crew

8.5

Boarding

8.2

Overall

7.9

Entertainment

7.9

Food

7.3

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
7.9
Good
7,996 reviews
Delta
7.9
Good
7,996 reviews

Crew

8.5

Boarding

8.2

Overall

7.9

Entertainment

7.9

Food

7.3

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
8,997 reviews
Delta
7.9
Good
7,996 reviews

Crew

8.5

Boarding

8.2

Overall

7.9

Entertainment

7.9

Food

7.3

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
11,033 reviews
Delta
7.9
Good
7,996 reviews

Crew

8.5

Boarding

8.2

Overall

7.9

Entertainment

7.9

Food

7.3

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
3,122 reviews
Delta
7.9
Good
7,996 reviews

Crew

8.5

Boarding

8.2

Overall

7.9

Entertainment

7.9

Food

7.3

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, Alaska Airlines, and Delta can get you from Miami to Ontario in just under 8h 35m. Your travel time can differ by up to 14h 11m. Airlines will cover a distance of 2291 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 $305, respectively. Users have found that Frontier is 56% 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, January is the cheapest month in which you can book a flight from Miami to Ontario (average of $103). Flying from Miami to Ontario in July is currently the most expensive (average of $164). 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 octubre 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$170Average$280FlexibilityNo cancel feeOn-time62%
DeltaCheapest$253Average$444FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$305Average$396FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$336Average$444FlexibilityNo cancel feeOn-time69%

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