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$62+ 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 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — ONT
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
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 October 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$160
(Kiwi.com)

One-way from

$62
(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. 4% potential increase in price ($20 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 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 October 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/15. 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.
Thu 11/1312:17 pmMIA - ONT
1 stop9h 32mMultiple Airlines
Sun 11/164:15 pmONT - MIA
1 stop28h 25mMultiple Airlines
Deal found 10/15$160
This Kiwi.com deal was found by Cheapflights users on 10/15. 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.
Thu 10/3010:30 amMIA - ONT
1 stop23h 59mMultiple Airlines
Mon 11/31:46 pmONT - MIA
1 stop7h 22mMultiple Airlines
Deal found 10/15$166
This CheapOair deal was found by Cheapflights users on 10/15. 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.
Sat 11/16:00 amMIA - ONT
1 stop20h 50mFrontier
Sat 11/86:53 amONT - MIA
1 stop20h 26mFrontier
Deal found 10/15$180
This Vliegwinkel deal was found by Cheapflights users on 10/15. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/316:00 amMIA - ONT
1 stop20h 50mFrontier
Sat 11/86:53 amONT - MIA
1 stop20h 26mFrontier
Deal found 10/15$197
This CheapOair deal was found by Cheapflights users on 10/16. 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.
Sat 11/16:00 amMIA - ONT
1 stop20h 50mFrontier
Wed 11/58:45 amONT - MIA
1 stop18h 34mFrontier
Deal found 10/16$210
This Gotogate deal was found by Cheapflights users on 10/16. 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.
Thu 11/66:00 amMIA - ONT
1 stop20h 50mFrontier
Wed 11/128:45 amONT - MIA
1 stop18h 34mFrontier
Deal found 10/16$211
This Kiwi.com deal was found by Cheapflights users on 10/13. 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.
Wed 11/123:25 pmMIA - ONT
1 stop22h 09mMultiple Airlines
Wed 11/198:45 amONT - MIA
2 stops23h 38mMultiple Airlines
Deal found 10/13$217
This eDestinos deal was found by Cheapflights users on 10/16. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/186:05 amMIA - ONT
1 stop20h 54mFrontier
Wed 12/246:40 amONT - MIA
1 stop19h 20mFrontier
Deal found 10/16$223

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 October 16, 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

Tue 3/3

5:55 pm-6:17 pm

1 stop27h 22m

Ontario

Sat 3/7

6:55 pm-3:55 pm

1 stop18h 00m

$316

MiamiOntario

MIA - ONT

MIAONT

Miami

Thu 11/20

6:43 pm-11:52 pm

1 stop8h 09m

Ontario

Mon 12/1

10:25 pm-9:27 am

1 stop8h 02m

$317

MiamiOntario

MIA - ONT

MIAONT

Miami

Tue 11/11

6:00 am-11:06 am

1 stop8h 06m

Ontario

Wed 11/12

7:05 am-6:25 pm

1 stop8h 20m

$327

MiamiOntario

MIA - ONT

MIAONT

Miami

Fri 10/31

6:00 am-10:26 am

1 stop7h 26m

Ontario

Sat 11/8

11:36 am-12:29 am

1 stop9h 53m

$327

MiamiOntario

MIA - ONT

MIAONT

Miami

Tue 11/25

3:40 pm-11:04 pm

1 stop10h 24m

Ontario

Mon 12/1

10:25 pm-9:27 am

1 stop8h 02m

$327

MiamiOntario

MIA - ONT

MIAONT

Miami

Wed 11/12

6:00 am-10:34 am

1 stop7h 34m

Ontario

Fri 11/14

12:16 pm-10:13 pm

1 stop6h 57m

$327

MiamiOntario

MIA - ONT

MIAONT

Miami

Wed 11/5

12:15 pm-7:19 pm

1 stop10h 04m

Ontario

Sat 11/8

11:36 am-12:29 am

1 stop9h 53m

$327

MiamiOntario

MIA - ONT

MIAONT

Miami

Tue 11/11

6:43 pm-11:52 pm

1 stop8h 09m

Ontario

Tue 11/18

4:49 pm-9:23 am

2 stops13h 34m

$332

MiamiOntario

MIA - ONT

MIAONT

Miami

Wed 11/12

11:40 am-7:15 pm

2 stops10h 35m

Ontario

Wed 11/19

8:30 am-9:50 pm

2 stops10h 20m

$340

MiamiOntario

MIA - ONT

MIAONT

Miami

Wed 1/7

6:50 am-12:34 pm

1 stop8h 44m

$154

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/16

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*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*3 stars
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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Miami-Ontario flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 October 16, 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 October 16, 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
7,984 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
7,984 reviews
Delta
8.0
Very good
7,984 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
8,982 reviews
Delta
8.0
Very good
7,984 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
11,043 reviews
Delta
8.0
Very good
7,984 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
3,137 reviews
Delta
8.0
Very good
7,984 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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?

    Alaska Airlines and Delta can get you from Miami to Ontario in just under 8h 09m. Your travel time can differ by up to 19h 13m. 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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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 October 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$170Average$280FlexibilityNo cancel feeOn-time62%
DeltaCheapest$253Average$481FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$305Average$398FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$336Average$444FlexibilityNo cancel feeOn-time69%

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