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$124+ 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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MIA
Jul 16 — Jul 231
Thu 7/16
Thu 7/23
1 adult, Economy
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Find cheap flights from Ontario to Miami with Cheapflights

1. Tell us where you want to go

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3. Compare prices and book

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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 June 16, 2026.

This Flightnetwork 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/69:36 am
ONT
-
MIA
1 stop11h 45m
Frontier
Wed 8/126:00 am
MIA
-
ONT
1 stop20h 50m
Frontier
Deal found 6/11$241
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/79:36 am
ONT
-
MIA
1 stop11h 45m
Frontier
Mon 8/249:35 am
MIA
-
ONT
1 stop11h 17m
Frontier
Deal found 6/10$245
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/79:36 am
ONT
-
MIA
1 stop11h 45m
Frontier
Fri 8/1410:15 pm
MIA
-
ONT
1 stop12h 48m
Frontier
Deal found 6/10$250
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/205:43 pm
ONT
-
MIA
1 stop27h 33m
Frontier
Mon 8/249:35 am
MIA
-
ONT
1 stop11h 17m
Frontier
Deal found 6/10$251
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/229:32 am
ONT
-
MIA
1 stop11h 59m
Frontier
Tue 8/410:15 pm
MIA
-
ONT
1 stop12h 48m
Frontier
Deal found 6/10$252
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/259:32 am
ONT
-
MIA
1 stop11h 59m
Frontier
Sat 8/86:30 am
MIA
-
ONT
1 stop28h 02m
Frontier
Deal found 6/11$254
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.
Mon 8/33:40 pm
ONT
-
MIA
1 stop11h 50m
Frontier
Mon 8/1010:15 pm
MIA
-
ONT
1 stop12h 48m
Frontier
Deal found 6/11$258
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/17:05 am
ONT
-
MIA
1 stop8h 37m
Delta
Tue 9/86:50 am
MIA
-
ONT
1 stop8h 39m
Delta
Deal found 6/11$261
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/99:36 am
ONT
-
MIA
1 stop11h 45m
Frontier
Wed 8/1210:15 pm
MIA
-
ONT
1 stop12h 48m
Frontier
Deal found 6/10$264
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/119:32 am
ONT
-
MIA
1 stop11h 59m
Frontier
Tue 7/1410:15 pm
MIA
-
ONT
1 stop19h 59m
Frontier
Deal found 6/11$265
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/79:36 am
ONT
-
MIA
1 stop11h 45m
Frontier
Sun 8/1610:15 pm
MIA
-
ONT
1 stop12h 48m
Frontier
Deal found 6/10$269

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 June 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$241
(Flightnetwork)

One-way from

$124
(Super.com)

Popular in

December

Cheapest in

September

Average price

$474
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. 5% potential increase in price ($24 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 16, 2026.
Use the filters below to find and compare flights from Ontario to Miami that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Thu 8/20

8:10 am-10:05 pm

2 stops10h 55m

Miami

Mon 8/24

5:45 am-9:15 am

1 stop6h 30m

$353

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sat 8/29

5:40 am-7:15 pm

2 stops10h 35m

Miami

Sun 9/6

7:55 am-1:05 pm

1 stop8h 10m

$412

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Wed 7/22

5:15 am-5:15 pm

2 stops9h 00m

Miami

Tue 7/28

3:05 pm-8:00 pm

2 stops7h 55m

$435

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Thu 7/23

8:00 am-12:30 am

2 stops13h 30m

Miami

Tue 7/28

3:05 pm-11:05 pm

2 stops11h 00m

$463

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Fri 8/21

5:00 am-3:56 pm

1 stop7h 56m

Miami

Tue 8/25

11:30 am-8:53 pm

2 stops12h 23m

$540

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sat 6/27

7:10 am-10:40 pm

2 stops12h 30m

Miami

Fri 7/3

5:10 am-8:55 am

1 stop6h 45m

$542

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sun 8/2

6:00 am-5:34 pm

1 stop8h 34m

Miami

Thu 8/6

4:53 pm-9:55 pm

1 stop8h 02m

$555
Quickest round-trip

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sat 8/1

5:00 am-4:16 pm

1 stop8h 16m

Miami

Fri 8/7

4:53 pm-9:55 pm

1 stop8h 02m

$557

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Mon 8/3

6:39 pm-7:39 am

1 stop10h 00m

Miami

Fri 8/7

4:53 pm-9:55 pm

1 stop8h 02m

$557

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Wed 7/15

11:55 pm-4:25 pm

2 stops13h 30m

Miami

Sun 7/19

5:00 am-12:20 pm

2 stops10h 20m

$586

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 21 resultsSorted by cheapest first
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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapTicketsDealPrice Accuracy1 starTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
CheapOairPrice Accuracy3 starsTrust Score*3 stars
GotogatePrice Accuracy2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Miami flight deals on Cheapflights vs. FlightHub >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 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 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?

Booking 41 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, September is the cheapest month in which you can book a flight from Ontario to Miami (average of $351). Flying from Ontario to Miami in December is currently the most expensive (average of $536). 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.

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

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 June 16, 2026.
Read through reviews of airlines operating flights from Ontario to Miami, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,235 reviews

Comfort

8.0

Food

7.0

Overall

7.9

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
Southwest
7.9
Good
4,235 reviews
Southwest
7.9
Good
4,235 reviews

Comfort

8.0

Food

7.0

Overall

7.9

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
Delta
7.9
Good
8,396 reviews
Southwest
7.9
Good
4,235 reviews

Comfort

8.0

Food

7.0

Overall

7.9

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
United Airlines
7.4
Good
9,831 reviews
Southwest
7.9
Good
4,235 reviews

Comfort

8.0

Food

7.0

Overall

7.9

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
American Airlines
7.1
Good
11,660 reviews
Southwest
7.9
Good
4,235 reviews

Comfort

8.0

Food

7.0

Overall

7.9

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
Frontier
5.6
Fair
2,887 reviews
Southwest
7.9
Good
4,235 reviews

Comfort

8.0

Food

7.0

Overall

7.9

Boarding

8.1

Entertainment

7.5

Crew

8.6

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

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 10h 55m. Fly via Southwest to get the fastest option. The distance from Ontario to Miami is about 2291 mi.

  • 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 $124. Additional round-trip tickets that might be worth considering are offered by JetBlue and Delta, with the lowest prices starting at $213 and $242, respectively. Frontier is 69% 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?

    $94 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Southwest and American Airlines, with prices starting from $136 and $163, 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 $44.

  • 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, September is the cheapest month in which you can book a flight from Ontario to Miami (average of $351). Flying from Ontario to Miami in December is currently the most expensive (average of $536). 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
Hollywood
Dania Beach
Doral
Miramar
Miami Springs
Hialeah
Sunrise
Plantation
Palm Beach
Miami Lakes
Deerfield Beach
Lake Worth
Oakland Park
Kendall
Tamarac
Bonita Springs
Marathon
North Palm Beach
Fisher Island

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Miami

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Ontario to Miami

Discover the top 6 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 June 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$124Average$272FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$213Average$436FlexibilityNo cancel feeOn-time62%
DeltaCheapest$242Average$362FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$315Average$415FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$326Average$398FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$351Average$487FlexibilityNo cancel feeOn-time63%

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