HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Miami

$110+ 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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MIA
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Miami with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Ontario to Miami are usually found in September or August, booked 43 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Cheap 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 July 31, 2025.

Round-trip from

$257
(Frontier)

One-way from

$110
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$412
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 ($37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find 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 July 31, 2025.

This Frontier deal was found by Cheapflights users on 7/29. 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 8/135:21 pmONT - MIA
1 stop10h 09mFrontier
Sat 8/167:15 amMIA - ONT
1 stop12h 05mFrontier
Deal found 7/29$257
This Delta deal was found by Cheapflights users on 7/29. 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.
Sun 10/2611:36 amONT - MIA
1 stop9h 53mDelta
Fri 10/3112:09 pmMIA - ONT
2 stops12h 11mDelta
Deal found 7/29$312
This Alaska Airlines deal was found by Cheapflights users on 7/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/227:47 pmONT - MIA
1 stop18h 58mAlaska Airlines
Fri 9/266:45 pmMIA - ONT
1 stop18h 59mAlaska Airlines
Deal found 7/30$332
This United Airlines deal was found by Cheapflights users on 7/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/156:00 amONT - MIA
1 stop8h 33mUnited Airlines
Tue 9/306:45 amMIA - ONT
2 stops11h 17mUnited Airlines
Deal found 7/30$338
This American Airlines deal was found by Cheapflights users on 7/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/121:10 pmONT - MIA
2 stops9h 22mAmerican Airlines
Fri 9/197:02 amMIA - ONT
1 stop9h 52mAmerican Airlines
Deal found 7/29$341

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 July 31, 2025.
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

Wed 8/13

5:21 pm-6:30 am

1 stop10h 09m

Miami

Sat 8/16

7:15 am-4:20 pm

1 stop12h 05m

$257

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sun 10/26

11:36 am-12:29 am

1 stop9h 53m

Miami

Fri 10/31

12:09 pm-9:20 pm

2 stops12h 11m

$312

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Mon 9/22

7:47 pm-5:45 pm

1 stop18h 58m

Miami

Fri 9/26

6:45 pm-10:44 am

1 stop18h 59m

$332

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Mon 9/15

6:00 am-5:33 pm

1 stop8h 33m

Miami

Tue 9/30

6:45 am-3:02 pm

2 stops11h 17m

$338

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Fri 9/12

1:10 pm-1:32 am

2 stops9h 22m

Miami

Fri 9/19

7:02 am-1:54 pm

1 stop9h 52m

$341

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Wed 8/13

6:45 am-8:40 pm

1 stop10h 55m

Miami

Wed 8/20

9:00 am-4:45 pm

2 stops10h 45m

$348

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sun 9/7

12:28 pm-12:49 am

1 stop9h 21m

$110

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Tue 8/12

5:21 pm-6:30 am

1 stop10h 09m

$129

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sun 8/31

11:45 am-12:24 am

1 stop9h 39m

$139

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Mon 8/18

11:59 pm-10:05 am

1 stop7h 06m

$168

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 14 results
1
2

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 July 25, 2025.

Booking 43 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 $232). Flying from Ontario to Miami in March is currently the most expensive (average of $289). 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 ONT to MIA?

Find hourly flight availability from Ontario to Miami. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 31, 2025.

One of the essential ways to save on airfare from Ontario to Miami is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 18% on airfare.

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 July 31, 2025.
Read through reviews of airlines operating flights from Ontario to Miami, such as Alaska Airlines, Southwest, and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Food

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Food

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,244 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Food

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Food

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,610 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Food

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,902 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Food

7.1

Boarding

8.1

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • 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 $257. Additional round-trip tickets that might be worth considering are offered by Delta and Alaska Airlines, with the lowest prices starting at $312 and $332, respectively. Frontier is 40% 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?

    $129 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Delta and American Airlines, with prices starting from $139 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 $52.

  • 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 $232). Flying from Ontario to Miami in March is currently the most expensive (average of $289). 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
Hollywood
Aventura
Coral Gables
Sunny Isles Beach
Marathon
Doral
Boynton Beach
Hialeah
Miami Springs
Riviera Beach
Pembroke Pines
Plantation
Sunrise
Dania Beach
Palm Beach
Palm Beach Gardens
Miami Lakes
Miami Gardens
Deerfield Beach
Wilton Manors

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Miami

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Miami flights
Los Angeles to Orlando flights
Los Angeles to Fort Lauderdale flights
San Francisco to Miami flights
Burbank to Fort Lauderdale flights
San Francisco to Orlando flights
Ontario to Orlando flights
Santa Ana to Fort Lauderdale flights
Los Angeles to Tampa flights
San Diego to Orlando flights
San Diego to Miami flights
San Francisco to Fort Lauderdale flights
Las Vegas to Orlando flights
Ontario to Fort Lauderdale flights
Santa Ana to Orlando flights
Burbank to Miami flights
Santa Ana to Miami flights
Los Angeles to West Palm Beach flights
Las Vegas to Fort Lauderdale flights
San Diego to Fort Lauderdale flights
San Francisco to Tampa flights
Burbank to Orlando flights
San Diego to Tampa flights
Oakland to Fort Lauderdale flights
Sacramento to Orlando flights
Los Angeles to Orlando Sanford Intl flights
Sacramento to Miami flights
San Jose to Orlando flights
Oakland to Orlando flights
Sacramento to Fort Lauderdale flights
Ontario to Tampa flights
Las Vegas to Tampa flights
Las Vegas to Miami flights
San Jose to Fort Lauderdale flights
San Jose to Miami flights
Ontario to West Palm Beach flights
Los Angeles to Fort Myers flights
Oakland to Miami flights
Burbank to Tampa flights
Sacramento to West Palm Beach flights
Santa Ana to Tampa flights
San Francisco to West Palm Beach flights
Los Angeles to Sarasota flights
Sacramento to Tampa flights
Fresno to Orlando flights
San Francisco to Fort Myers flights
Ontario to Jacksonville flights
Los Angeles to Pensacola flights
San Francisco to Jacksonville flights

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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$130Average$261FlexibilityNo cancel feeOn-time62%
DeltaCheapest$256Average$390FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$283Average$444FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$290Average$481FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$360Average$536FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.