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Cheap flights from Ontario to Miami from $124

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 6/4. 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
3:40 pm - 12:21 am
ONT
-
MIA
29h 41m
2 stops
Frontier Logo
10:06 pm - 3:09 pm
MIA
-
ONT
20h 03m
1 stop
$233Frontier
Mon, Aug 10 - Mon, Aug 17
Frontier Logo
10:50 am - 5:54 am
ONT
-
MIA
16h 04m
1 stop
Frontier Logo
10:15 pm - 8:03 am
MIA
-
ONT
12h 48m
1 stop
$238Frontier
Fri, Jul 3 - Fri, Jul 10
Frontier Logo
11:58 am - 7:11 am
ONT
-
MIA
16h 13m
1 stop
Frontier Logo
10:06 pm - 3:07 pm
MIA
-
ONT
20h 01m
1 stop
$239Frontier
Sat, Jul 4 - Fri, Jul 10
Frontier Logo
3:34 pm - 7:11 am
ONT
-
MIA
12h 37m
1 stop
Frontier Logo
10:06 pm - 3:07 pm
MIA
-
ONT
20h 01m
1 stop
$240Frontier
Sat, Jul 4 - Fri, Jul 10
Frontier Logo
6:00 am - 5:20 am
ONT
-
MIA
20h 20m
1 stop
Frontier Logo
10:06 pm - 3:07 pm
MIA
-
ONT
20h 01m
1 stop
$243Frontier
Sat, Jul 4 - Tue, Jul 7
Frontier Logo
10:50 am - 5:54 am
ONT
-
MIA
16h 04m
1 stop
Frontier Logo
10:06 pm - 3:07 pm
MIA
-
ONT
20h 01m
1 stop
$248Frontier
Fri, Jul 3 - Fri, Jul 10
Frontier Logo
5:43 pm - 12:21 am
ONT
-
MIA
27h 38m
1 stop
Frontier Logo
6:00 am - 5:49 pm
MIA
-
ONT
14h 49m
1 stop
$262Frontier
Fri, Jul 24 - Wed, Jul 29
Frontier Logo
3:34 pm - 7:11 am
ONT
-
MIA
12h 37m
1 stop
Frontier Logo
6:50 am - 4:30 pm
MIA
-
ONT
12h 40m
1 stop
$263Frontier
Sat, Jul 4 - Wed, Jul 8
Frontier Logo
6:00 am - 5:51 am
ONT
-
MIA
20h 51m
1 stop
Frontier Logo
10:15 pm - 3:54 pm
MIA
-
ONT
20h 39m
1 stop
$268Frontier
Fri, Jul 17 - Wed, Jul 22
Frontier Logo
3:40 pm - 6:30 am
ONT
-
MIA
11h 50m
1 stop
Frontier Logo
7:20 am - 1:57 pm
MIA
-
ONT
9h 37m
1 stop
$269Frontier
Tue, Jul 7 - Wed, Sep 9

Frontier flights from Ontario to Miami

Our best Frontier deals on Ontario to Miami flight tickets
Frontier
Aug 10
ONT3:40 pmOntario
29h 41m
2 stops
MIA12:21 amMiami
Aug 17
MIA10:06 pmMiami
20h 03m
1 stop
ONT3:09 pmOntario
$233
Frontier
Jul 3
ONT10:50 amOntario
16h 04m
1 stop
MIA5:54 amMiami
Jul 10
MIA10:15 pmMiami
12h 48m
1 stop
ONT8:03 amOntario
$238
Frontier
Jul 4
ONT11:58 amOntario
16h 13m
1 stop
MIA7:11 amMiami
Jul 10
MIA10:06 pmMiami
20h 01m
1 stop
ONT3:07 pmOntario
$239

Delta flights from Ontario to Miami

Our best Delta deals on Ontario to Miami flight tickets
Delta
Jun 3
ONT7:05 amOntario
9h 53m
1 stop
MIA7:58 pmMiami
Jun 5
MIA7:00 amMiami
8h 19m
1 stop
ONT12:19 pmOntario
$342
Delta
Jun 3
ONT7:05 amOntario
9h 53m
1 stop
MIA7:58 pmMiami
Jun 6
MIA7:00 amMiami
8h 19m
1 stop
ONT12:19 pmOntario
$363
Delta
May 27
ONT12:07 pmOntario
9h 40m
1 stop
MIA12:47 amMiami
May 29
MIA7:00 amMiami
8h 19m
1 stop
ONT12:19 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 May 22, 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

Mon 8/10

3:40 pm-12:21 am

2 stops29h 41m

Miami

Mon 8/17

10:06 pm-3:09 pm

1 stop20h 03m

$233

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Fri 7/3

10:50 am-5:54 am

1 stop16h 04m

Miami

Fri 7/10

10:15 pm-8:03 am

1 stop12h 48m

$238

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sat 7/4

11:58 am-7:11 am

1 stop16h 13m

Miami

Fri 7/10

10:06 pm-3:07 pm

1 stop20h 01m

$239

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sat 7/4

3:34 pm-7:11 am

1 stop12h 37m

Miami

Fri 7/10

10:06 pm-3:07 pm

1 stop20h 01m

$240

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sat 7/4

6:00 am-5:20 am

1 stop20h 20m

Miami

Tue 7/7

10:06 pm-3:07 pm

1 stop20h 01m

$243

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Fri 7/3

10:50 am-5:54 am

1 stop16h 04m

Miami

Fri 7/10

10:06 pm-3:07 pm

1 stop20h 01m

$248

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Fri 7/24

5:43 pm-12:21 am

1 stop27h 38m

Miami

Wed 7/29

6:00 am-5:49 pm

1 stop14h 49m

$262

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sat 7/4

3:34 pm-7:11 am

1 stop12h 37m

Miami

Wed 7/8

6:50 am-4:30 pm

1 stop12h 40m

$263

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Fri 7/17

6:00 am-5:51 am

1 stop20h 51m

Miami

Wed 7/22

10:15 pm-3:54 pm

1 stop20h 39m

$268
Quickest round-trip

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Tue 7/7

3:40 pm-6:30 am

1 stop11h 50m

Miami

Wed 9/9

7:20 am-1:57 pm

1 stop9h 37m

$269

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 typical price of a round-trip flight between Ontario and Miami?

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 Wednesday when prices can be found for as low as $543. 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 $609.

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 $588. 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 from Ontario 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 $402 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 $340 on momondo.

How have Ontario to Miami flight prices changed over time?

As of May 2026, prices for Ontario to Miami flights are approximately 2% 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

8h 29m

Direct flights

None
The fastest flight from Ontario to Miami takes 8h 29m
There are no direct flights from Ontario to Miami. There are no popular flight routes from Ontario to Miami.
Search flight deals

Frequently asked questions about flying from Ontario to Miami

  • 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 8h 29m.

  • 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 $124Free CancellationRating
5.6
2,944 reviews
Search Frontier flights
JetBluePriceFrom $213Free CancellationRating
7.2
2,980 reviews
Search JetBlue flights
DeltaPriceFrom $256Free CancellationRating
7.9
8,445 reviews
Search Delta flights
American AirlinesPriceFrom $315Free CancellationRating
7.1
11,643 reviews
Search American Airlines flights
United AirlinesPriceFrom $326Free CancellationRating
7.4
9,752 reviews
Search United Airlines flights
SouthwestPriceFrom $351Free CancellationRating
7.9
4,277 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
Islamorada
Marco Island
Key Largo
Marathon
Palm Beach
Pompano Beach
Delray Beach
Dania Beach
Sunny Isles Beach
Bonita Springs
Doral
Jupiter
Lake Worth
Boynton Beach
Miami Springs
Deerfield Beach
Lauderdale-by-the-Sea
Surfside

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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