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Cheap flights from Ontario to Miami from $73

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Miami departing on 2/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ontario to Miami

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
8:35 am - 5:48 am
ONT
-
MIA
18h 13m
1 stop
Frontier Logo
6:25 am - 9:34 pm
MIA
-
ONT
18h 09m
1 stop
$133Frontier
Tue, Feb 24 - Wed, Mar 4
Frontier Logo
8:35 am - 5:48 am
ONT
-
MIA
18h 13m
1 stop
Frontier Logo
5:50 am - 11:59 pm
MIA
-
ONT
21h 09m
1 stop
$139Frontier
Tue, Feb 24 - Sat, Mar 7
Multiple Airlines Logo
8:35 am - 5:48 am
ONT
-
MIA
18h 13m
1 stop
Multiple Airlines Logo
7:05 am - 9:34 pm
MIA
-
ONT
17h 29m
2 stops
$143Multiple Airlines
Tue, Feb 24 - Tue, Mar 3
Frontier Logo
8:35 am - 5:48 am
ONT
-
MIA
18h 13m
1 stop
Frontier Logo
6:45 am - 11:59 pm
MIA
-
ONT
20h 14m
1 stop
$148Frontier
Tue, Feb 24 - Thu, Mar 5
Multiple Airlines Logo
8:35 am - 5:48 am
ONT
-
MIA
18h 13m
1 stop
Multiple Airlines Logo
7:05 am - 11:59 pm
MIA
-
ONT
19h 54m
2 stops
$149Multiple Airlines
Tue, Feb 24 - Sat, Mar 7
Frontier Logo
8:21 am - 10:23 am
ONT
-
MIA
23h 02m
1 stop
Frontier Logo
6:25 am - 9:34 pm
MIA
-
ONT
18h 09m
1 stop
$155Frontier
Sat, Feb 28 - Tue, Mar 3
Frontier Logo
7:30 am - 5:14 am
ONT
-
MIA
18h 44m
1 stop
Frontier Logo
5:45 am - 9:34 pm
MIA
-
ONT
18h 49m
1 stop
$159Frontier
Wed, Feb 18 - Wed, Feb 25
Frontier Logo
8:35 am - 5:48 am
ONT
-
MIA
18h 13m
1 stop
Frontier Logo
6:25 am - 9:34 pm
MIA
-
ONT
18h 09m
1 stop
$160Frontier
Tue, Feb 24 - Tue, Mar 3
Frontier Logo
6:15 am - 5:38 am
ONT
-
MIA
20h 23m
1 stop
Frontier Logo
5:50 am - 11:59 pm
MIA
-
ONT
21h 09m
1 stop
$161Frontier
Tue, Mar 10 - Tue, Mar 17
Frontier Logo
6:00 am - 10:28 am
ONT
-
MIA
25h 28m
2 stops
Frontier Logo
6:25 am - 9:34 pm
MIA
-
ONT
18h 09m
1 stop
$166Frontier
Fri, Feb 27 - Tue, Mar 3

Frontier flights from Ontario to Miami

Our best Frontier deals on Ontario to Miami flight tickets
Frontier
Feb 24
ONT8:35 amOntario
18h 13m
1 stop
MIA5:48 amMiami
Mar 4
MIA6:25 amMiami
18h 09m
1 stop
ONT9:34 pmOntario
$133
Frontier
Feb 24
ONT8:35 amOntario
18h 13m
1 stop
MIA5:48 amMiami
Mar 7
MIA5:50 amMiami
21h 09m
1 stop
ONT11:59 pmOntario
$139
Frontier
Feb 24
ONT8:35 amOntario
18h 13m
1 stop
MIA5:48 amMiami
Mar 5
MIA6:45 amMiami
20h 14m
1 stop
ONT11:59 pmOntario
$148

Southwest flights from Ontario to Miami

Our best Southwest deals on Ontario to Miami flight tickets
Southwest
Feb 10
ONT6:05 amOntario
11h 00m
2 stops
MIA8:05 pmMiami
Feb 14
MIA8:00 amMiami
10h 45m
1 stop
ONT3:45 pmOntario
$342
Southwest
Feb 11
ONT9:00 pmOntario
10h 45m
2 stops
MIA10:45 amMiami
Feb 18
MIA9:00 amMiami
11h 10m
2 stops
ONT5:10 pmOntario
$345
Southwest
Feb 7
ONT7:00 amOntario
9h 05m
1 stop
MIA7:05 pmMiami
Feb 11
MIA12:00 pmMiami
9h 40m
1 stop
ONT6:40 pmOntario
$377

momondo 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, momondo users made 832,500 searches. Data last updated January 29, 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

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Tue 2/24

8:35 am-5:48 am

1 stop18h 13m

Miami

Wed 3/4

6:25 am-9:34 pm

1 stop18h 09m

$133

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Tue 2/24

8:35 am-5:48 am

1 stop18h 13m

Miami

Sat 3/7

5:50 am-11:59 pm

1 stop21h 09m

$139

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Tue 2/24

8:35 am-5:48 am

1 stop18h 13m

Miami

Tue 3/3

7:05 am-9:34 pm

2 stops17h 29m

$143

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Tue 2/24

8:35 am-5:48 am

1 stop18h 13m

Miami

Thu 3/5

6:45 am-11:59 pm

1 stop20h 14m

$148

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Tue 2/24

8:35 am-5:48 am

1 stop18h 13m

Miami

Sat 3/7

7:05 am-11:59 pm

2 stops19h 54m

$149

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sat 2/28

8:21 am-10:23 am

1 stop23h 02m

Miami

Tue 3/3

6:25 am-9:34 pm

1 stop18h 09m

$155

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Wed 2/18

7:30 am-5:14 am

1 stop18h 44m

Miami

Wed 2/25

5:45 am-9:34 pm

1 stop18h 49m

$159

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Tue 2/24

8:35 am-5:48 am

1 stop18h 13m

Miami

Tue 3/3

6:25 am-9:34 pm

1 stop18h 09m

$160

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Tue 3/10

6:15 am-5:38 am

1 stop20h 23m

Miami

Tue 3/17

5:50 am-11:59 pm

1 stop21h 09m

$161

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Fri 2/27

6:00 am-10:28 am

2 stops25h 28m

Miami

Tue 3/3

6:25 am-9:34 pm

1 stop18h 09m

$166

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Miami from

How to get the cheapest flight ticket from Ontario to Miami

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Miami?

The month of September is, on average, the cheapest month to fly to Miami from Ontario, with most prices found around $336. If you are unable to visit Miami during the month of September, then departing from Ontario during the month August is also very affordable. Most momondo users find prices during this month for around $356.

What is the cheapest day to depart on your flight to Miami?

The cheapest day to depart from Ontario to Miami is on a Saturday when prices can be found for as low as $529. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Miami on Sunday is $569.

What is the cheapest time of day to depart on your flight to Miami?

In the afternoon is the cheapest time of day to fly from Ontario to Miami when you can find flight prices for as low as $479. Flying to Miami in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the evening because they tend to be around $575. Of course, these prices can vary depending on the time of year and what airport you fly to.

How far in advance should I book a flight to Miami?

You are more likely to see cheaper flights to Miami from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Miami for around $408 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Miami from Ontario for as low as $352 on momondo.

How have Ontario to Miami flight prices changed over time?

As of January 2026, prices for Ontario to Miami flights are approximately 99% more expensive when compared to flights at the same time last year.

When to book flights from Ontario to Miami

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Miami according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Miami (ONT to MIA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Miami

Fastest flight time

6h 23m

Direct flights

None
The fastest flight from Ontario to Miami takes 6h 23m
There are no direct flights from Ontario to Miami. There are no popular flight routes from Ontario to Miami.
Search flight deals

  • How far is Ontario to Miami by plane?

    Ontario and Miami are 2299.8 mi apart from one another. By plane, this route typically takes 6h 23m.

  • When did momondo last update prices for flights from Ontario Airport to Miami Airport?

    Prices for flights from Ontario Airport to Miami Airport are updated daily.

  • How many operators does momondo search for flights from Ontario Airport to Miami Airport?

  • How old do you have to be to fly from Ontario Airport to Miami Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Miami Airport.

  • What documentation or ID do you need to fly to Miami Airport?

    The travel and health documents required for your trip to Miami Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Miami Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Ontario to Miami?

Best airlines flying from Ontario to Miami

Compare and see reviews for airlines that fly from Ontario to Miami with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $150Free CancellationRating
5.7
3,056 reviews
Search Frontier flights
DeltaPriceFrom $258Free CancellationRating
7.9
8,128 reviews
Search Delta flights
American AirlinesPriceFrom $317Free CancellationRating
7.2
11,205 reviews
Search American Airlines flights
United AirlinesPriceFrom $326Free CancellationRating
7.4
9,215 reviews
Search United Airlines flights
SouthwestPriceFrom $356Free CancellationRating
8.0
4,267 reviews
Search Southwest flights

Traveling to a place near Miami?

Book flights to Miami if you plan to visit one of these locations
Miami Beach
Hollywood
Key Largo
Islamorada
Marco Island
Palm Beach
Marathon
Delray Beach
Pompano Beach
Sunny Isles Beach
Jupiter
Dania Beach
Bonita Springs
Doral
Lake Worth
Boynton Beach
Deerfield Beach
Lauderdale-by-the-Sea
Miramar
Homestead

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Miami?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Miami for you.

Can I find flights from Ontario to Miami with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Miami from Ontario with this policy.

How can momondo help me find flights from Ontario to Miami?

Once all potential Ontario to Miami flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ontario to Miami right now. Can momondo alert me if prices change?

Price alerts on flights to Miami from Ontario are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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