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Cheap flights from Ontario to Miami from $71

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 5/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
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
7:29 pm - 7:32 am
ONT
-
MIA
9h 03m
1 stop
Frontier Logo
7:50 am - 11:55 pm
MIA
-
ONT
19h 05m
1 stop
$169Frontier
Wed, May 6 - Tue, May 12
Frontier Logo
7:29 pm - 7:32 am
ONT
-
MIA
9h 03m
1 stop
Frontier Logo
7:50 am - 11:55 pm
MIA
-
ONT
19h 05m
1 stop
$171Frontier
Wed, May 6 - Tue, May 12
Frontier Logo
12:59 am - 5:05 am
ONT
-
MIA
25h 06m
1 stop
Frontier Logo
7:00 am - 11:55 pm
MIA
-
ONT
19h 55m
1 stop
$197Frontier
Mon, Apr 20 - Tue, Apr 28
Frontier Logo
5:33 pm - 5:05 am
ONT
-
MIA
8h 32m
1 stop
Frontier Logo
8:42 am - 6:23 pm
MIA
-
ONT
12h 41m
1 stop
$199Frontier
Mon, May 11 - Sat, May 16
Frontier Logo
6:15 am - 8:50 pm
ONT
-
MIA
11h 35m
1 stop
Frontier Logo
3:15 pm - 11:58 pm
MIA
-
ONT
11h 43m
1 stop
$200Frontier
Fri, Apr 17 - Fri, Apr 24
Frontier Logo
6:20 am - 5:49 am
ONT
-
MIA
20h 29m
1 stop
Frontier Logo
8:42 am - 6:49 pm
MIA
-
ONT
13h 07m
1 stop
$201Frontier
Tue, Apr 7 - Tue, Apr 14
Frontier Logo
6:15 am - 11:04 pm
ONT
-
MIA
13h 49m
1 stop
Frontier Logo
7:00 am - 11:55 pm
MIA
-
ONT
19h 55m
1 stop
$202Frontier
Thu, Apr 23 - Sun, Apr 26
Frontier Logo
8:26 am - 6:08 pm
ONT
-
MIA
6h 42m
1 stop
Frontier Logo
7:50 am - 11:55 pm
MIA
-
ONT
19h 05m
1 stop
$203Frontier
Sun, May 17 - Wed, May 20
Frontier Logo
5:33 pm - 5:05 am
ONT
-
MIA
8h 32m
1 stop
Frontier Logo
7:00 am - 11:55 pm
MIA
-
ONT
19h 55m
1 stop
$207Frontier
Fri, Apr 24 - Sun, Apr 26
Frontier Logo
5:18 pm - 9:44 am
ONT
-
MIA
13h 26m
1 stop
Frontier Logo
7:00 am - 11:56 pm
MIA
-
ONT
19h 56m
1 stop
$211Frontier
Wed, Apr 1 - Tue, Apr 7

Frontier flights from Ontario to Miami

Our best Frontier deals on Ontario to Miami flight tickets
Frontier
May 6
ONT7:29 pmOntario
9h 03m
1 stop
MIA7:32 amMiami
May 12
MIA7:50 amMiami
19h 05m
1 stop
ONT11:55 pmOntario
$169
Frontier
May 6
ONT7:29 pmOntario
9h 03m
1 stop
MIA7:32 amMiami
May 12
MIA7:50 amMiami
19h 05m
1 stop
ONT11:55 pmOntario
$171
Frontier
Apr 20
ONT12:59 amOntario
25h 06m
1 stop
MIA5:05 amMiami
Apr 28
MIA7:00 amMiami
19h 55m
1 stop
ONT11:55 pmOntario
$197

Southwest flights from Ontario to Miami

Our best Southwest deals on Ontario to Miami flight tickets
Southwest
Mar 19
ONT5:50 amOntario
10h 10m
1 stop
MIA7:00 pmMiami
Mar 24
MIA5:30 amMiami
10h 35m
2 stops
ONT1:05 pmOntario
$408
Southwest
Mar 19
ONT5:50 amOntario
10h 10m
1 stop
MIA7:00 pmMiami
Mar 24
MIA11:40 amMiami
14h 30m
2 stops
ONT11:10 pmOntario
$413
Southwest
Mar 11
ONT7:05 amOntario
11h 35m
2 stops
MIA9:40 pmMiami
Mar 25
MIA12:55 pmMiami
10h 25m
1 stop
ONT8:20 pmOntario
$452

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 March 10, 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

Wed 5/6

7:29 pm-7:32 am

1 stop9h 03m

Miami

Tue 5/12

7:50 am-11:55 pm

1 stop19h 05m

$169

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Wed 5/6

7:29 pm-7:32 am

1 stop9h 03m

Miami

Tue 5/12

7:50 am-11:55 pm

1 stop19h 05m

$171

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Mon 4/20

12:59 am-5:05 am

1 stop25h 06m

Miami

Tue 4/28

7:00 am-11:55 pm

1 stop19h 55m

$197
Quickest round-trip

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Mon 5/11

5:33 pm-5:05 am

1 stop8h 32m

Miami

Sat 5/16

8:42 am-6:23 pm

1 stop12h 41m

$199

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Fri 4/17

6:15 am-8:50 pm

1 stop11h 35m

Miami

Fri 4/24

3:15 pm-11:58 pm

1 stop11h 43m

$200

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Tue 4/7

6:20 am-5:49 am

1 stop20h 29m

Miami

Tue 4/14

8:42 am-6:49 pm

1 stop13h 07m

$201

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Thu 4/23

6:15 am-11:04 pm

1 stop13h 49m

Miami

Sun 4/26

7:00 am-11:55 pm

1 stop19h 55m

$202

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sun 5/17

8:26 am-6:08 pm

1 stop6h 42m

Miami

Wed 5/20

7:50 am-11:55 pm

1 stop19h 05m

$203

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Fri 4/24

5:33 pm-5:05 am

1 stop8h 32m

Miami

Sun 4/26

7:00 am-11:55 pm

1 stop19h 55m

$207

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Wed 4/1

5:18 pm-9:44 am

1 stop13h 26m

Miami

Tue 4/7

7:00 am-11:56 pm

1 stop19h 56m

$211

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.

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 $400 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 $317 on momondo.

How have Ontario to Miami flight prices changed over time?

As of March 2026, prices for Ontario to Miami flights are approximately 21% cheaper 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 42m

Direct flights

None
The fastest flight from Ontario to Miami takes 6h 42m
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 42m.

  • 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 $162Free CancellationRating
5.7
3,033 reviews
Search Frontier flights
DeltaPriceFrom $258Free CancellationRating
7.9
8,276 reviews
Search Delta flights
United AirlinesPriceFrom $294Free CancellationRating
7.4
9,409 reviews
Search United Airlines flights
American AirlinesPriceFrom $317Free CancellationRating
7.1
11,414 reviews
Search American Airlines flights
SouthwestPriceFrom $367Free CancellationRating
8.0
4,317 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
Palm Beach
Marathon
Delray Beach
Pompano Beach
Dania Beach
Sunny Isles Beach
Bonita Springs
Jupiter
Doral
Boynton Beach
Lake Worth
Lauderdale-by-the-Sea
Deerfield Beach
Surfside
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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