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$59+ Cheap flights from Ontario to Miami (ONT - MIA)

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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MIA
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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Cheap flight deals from Ontario to Miami

Cheapest flights from Ontario to Miami
Explore the most affordable flight options available from Ontario to Miami. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/21. 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 3/116:15 am
ONT
-
MIA
2 stops25h 19m
Frontier
Sun 3/155:50 am
MIA
-
ONT
1 stop21h 09m
Frontier
Deal found 1/21$315
This CheapOair deal was found by Cheapflights users on 1/20. 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.
Fri 1/231:46 pm
ONT
-
MIA
1 stop26h 47m
Frontier
Tue 1/276:18 pm
MIA
-
ONT
1 stop23h 49m
Frontier
Deal found 1/20$316
This Kiwi.com deal was found by Cheapflights users on 1/21. 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.
Fri 1/301:46 pm
ONT
-
MIA
1 stop26h 47m
Multiple Airlines
Mon 2/26:45 am
MIA
-
ONT
2 stops20h 35m
Multiple Airlines
Deal found 1/21$317
This Kiwi.com deal was found by Cheapflights users on 1/20. 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.
Fri 3/66:15 am
ONT
-
MIA
2 stops39h 32m
Frontier
Fri 3/135:50 am
MIA
-
ONT
1 stop21h 09m
Frontier
Deal found 1/20$318
This Expedia deal was found by Cheapflights users on 1/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/106:20 am
ONT
-
MIA
1 stop20h 29m
Multiple Airlines
Fri 4/174:44 pm
MIA
-
ONT
1 stop20h 35m
Multiple Airlines
Deal found 1/20$320
This CheapOair deal was found by Cheapflights users on 1/20. 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.
Fri 4/36:20 am
ONT
-
MIA
1 stop20h 29m
Frontier
Mon 4/135:50 am
MIA
-
ONT
1 stop21h 06m
Frontier
Deal found 1/20$321
This CheapOair deal was found by Cheapflights users on 1/20. 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.
Thu 1/296:20 am
ONT
-
MIA
1 stop7h 17m
Frontier
Mon 2/27:00 am
MIA
-
ONT
1 stop20h 20m
Frontier
Deal found 1/20$322
This Booking.com deal was found by Cheapflights users on 1/21. 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.
Mon 3/26:10 am
ONT
-
MIA
1 stop20h 04m
Frontier
Sun 3/85:50 am
MIA
-
ONT
1 stop21h 09m
Frontier
Deal found 1/21$323
This Booking.com deal was found by Cheapflights users on 1/21. 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.
Thu 3/126:15 am
ONT
-
MIA
1 stop20h 23m
Frontier
Sun 3/157:00 am
MIA
-
ONT
1 stop14h 14m
Frontier
Deal found 1/21$324
This CheapOair deal was found by Cheapflights users on 1/21. 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.
Fri 2/201:18 pm
ONT
-
MIA
1 stop29h 41m
Frontier
Sun 2/226:45 am
MIA
-
ONT
1 stop20h 14m
Frontier
Deal found 1/21$325
This Expedia deal was found by Cheapflights users on 1/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/37:59 pm
ONT
-
MIA
1 stop18h 05m
Alaska Airlines
Wed 5/136:00 pm
MIA
-
ONT
1 stop32h 58m
Alaska Airlines
Deal found 1/21$326
This Delta deal was found by Cheapflights users on 1/19. 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 4/2110:15 pm
ONT
-
MIA
1 stop8h 04m
Delta
Wed 4/297:00 am
MIA
-
ONT
1 stop7h 29m
Delta
Deal found 1/19$327

Find flight deals from Ontario to Miami

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Miami (MIA). 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 January 21, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$315
(Kiwi.com)

One-way from

$59
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$411
Provider with most accurate pricing for Ontario-Miami flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Miami flights.
Search Deals
From Ontario to Miami
Search Deals
One-way flight from Ontario to Miami
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($36 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Miami 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 January 21, 2026.
Use the filters below to find and compare flights from Ontario to Miami that are best for you.

Fly from

Ontario

Fly to

Miami

Route

Depart

Return

Price

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Tue 3/10

6:15 am-4:56 pm

1 stop7h 41m

Miami

Mon 3/16

4:10 pm-10:18 pm

1 stop9h 08m

$327

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sat 2/21

7:00 am-3:44 pm

1 stop29h 44m

Miami

Wed 2/25

5:59 pm-11:32 pm

1 stop32h 33m

$335

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sun 3/8

11:55 pm-1:50 pm

2 stops10h 55m

Miami

Thu 3/12

11:35 am-9:20 pm

2 stops12h 45m

$338

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Mon 3/2

9:55 am-10:10 pm

2 stops9h 15m

Miami

Tue 3/10

11:40 am-11:10 pm

2 stops14h 30m

$341

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Tue 5/26

5:05 pm-6:07 am

1 stop10h 02m

Miami

Wed 6/3

8:05 am-6:15 pm

2 stops13h 10m

$352

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sat 3/14

4:02 pm-4:59 pm

1 stop21h 57m

Miami

Thu 3/19

6:04 pm-11:59 pm

1 stop32h 55m

$356

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sat 4/11

6:05 am-6:28 pm

1 stop9h 23m

Miami

Fri 4/17

4:15 pm-10:26 pm

1 stop9h 11m

$367

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Wed 3/4

8:40 am-5:14 am

1 stop17h 34m

Miami

Mon 3/30

7:59 pm-11:59 pm

1 stop31h 00m

$372

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Mon 3/9

5:40 am-4:55 pm

2 stops8h 15m

Miami

Thu 3/12

11:35 am-9:20 pm

2 stops12h 45m

$373

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Wed 4/15

7:08 pm-5:07 pm

1 stop18h 59m

Miami

Fri 4/17

4:44 pm-5:09 pm

1 stop27h 25m

$374

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 23 results
1
2
3

Compare providers for flights from Ontario to Miami

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 Ontario to Miami in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
CheapOairPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*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 Ontario-Miami flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Ontario-Miami flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from Ontario-Miami flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Miami flights, Cheapflights users trust CheapOair the most. CheapOair 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 Ontario-Miami 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 Ontario to Miami

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

How far ahead should I book a flight from Ontario to Miami?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Miami. Price data was last updated on January 16, 2026.

Booking 38 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Miami. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, May is the cheapest month in which you can book a flight from Ontario to Miami (average of $95). Flying from Ontario to Miami in June is currently the most expensive (average of $171). 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.

Reviews of airlines servicing Miami

Get insights into the airlines that provide service to Miami. 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 Miami. Reviews last updated January 21, 2026.
Read through reviews of airlines operating flights from Ontario to Miami, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,266 reviews

Crew

8.6

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Crew

8.6

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Delta
7.9
Good
8,089 reviews
Southwest
8.0
Very good
4,266 reviews

Crew

8.6

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
United Airlines
7.4
Good
9,191 reviews
Southwest
8.0
Very good
4,266 reviews

Crew

8.6

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.2
Good
11,174 reviews
Southwest
8.0
Very good
4,266 reviews

Crew

8.6

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Frontier
5.7
Fair
3,057 reviews
Southwest
8.0
Very good
4,266 reviews

Crew

8.6

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Miami. 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 Ontario to Miami?

    There are many flights that can get you from Ontario to Miami in 7h 41m. Fly via United Airlines, Alaska Airlines, or Southwest to get the fastest option. The distance from Ontario to Miami is about 2291 mi. This flight may include one or multiple stops.

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

    Flying on Frontier is currently your cheapest option to Miami, with prices starting at $150. Additional round-trip tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at $258 and $301, respectively. Frontier is 63% cheaper than the average price of flights available within the next 90 days to this destination.

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

    $83 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines and Southwest, with prices starting from $163 and $168, respectively.

  • Where are the most common layover locations when flying from Ontario to Miami?

    The most popular layover on flights from Ontario to Miami is Phoenix.

  • What are some popular things to do or see while on a layover in Phoenix?

    Chase Field, Desert Ridge Marketplace, and Phoenix Symphony Hall are the most popular attractions in Phoenix if you're in need of something to do during your layover. Chase Field, Desert Ridge Marketplace and Phoenix Symphony Hall are located about 4.0 mi, 16.7 mi, and 4.3 mi, respectively from Phoenix Sky Harbor Intl if you are interested in checking them out. Those on a layover in Phoenix in need of a rental car can book one at Phoenix Sky Harbor Intl for about $51.

  • Where are the least popular layover locations for Ontario to Miami flights?

    Ontario to Miami flights that have layovers will least frequently stop in Dallas.

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

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

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

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

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

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

    Currently, May is the cheapest month in which you can book a flight from Ontario to Miami (average of $95). Flying from Ontario to Miami in June is currently the most expensive (average of $171). 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

Traveling to a place near Miami?

Book flights to Miami if you plan to visit one of these locations
Sunny Isles Beach
Aventura
Hollywood
Coral Gables
Marathon
Doral
Plantation
Sunrise
Dania Beach
Miami Springs
Riviera Beach
Palm Beach
Boynton Beach
Hialeah
Deerfield Beach
Miami Lakes
Miami Gardens
Tamarac
Miramar
Oakland Park

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Miami

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Top 5 airlines flying from Ontario to Miami

Discover the top 5 airlines that operate flights from Ontario to Miami. 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 January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$150Average$272FlexibilityNo cancel feeOn-time62%
DeltaCheapest$258Average$387FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$301Average$410FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$317Average$431FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$367Average$463FlexibilityNo cancel feeOn-time63%

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