What is the cheapest airline that flies from Miami to Ontario?

Frontier, Delta, and Southwest are the most popular carriers operating from Miami to Ontario

What airlines fly to Ontario?

JetBlue, American Airlines and Delta are the top three most popular airlines that fly to Ontario from Miami according to our data. JetBlue is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 8 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from Miami Airport to Ontario Airport refresh daily.

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

The number of operators available for flights from Miami Airport to Ontario Airport is 4 as of July 2025.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Miami Airport to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The travel and health documents required for your trip to Ontario 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 Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$110 Cheap Flights from Miami to Ontario in 2025

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Find the cheapest flights from Miami to Los Angeles

Round-trip

One-way

Last minute

Cheap round-trip flights

7:15 am - 11:53 amMIA-ONT

7h 38m1 stop

5:14 pm - 5:45 amONT-MIA

9h 31m1 stop

$219Frontier

Find Deal

Fri, Aug 15 - Sun, Aug 17

7:15 am - 4:19 pmMIA-ONT

12h 04m1 stop

5:21 pm - 6:30 amONT-MIA

10h 09m1 stop

$223Frontier

Find Deal

Thu, Jul 24 - Sat, Aug 2

7:15 am - 11:53 amMIA-ONT

7h 38m1 stop

5:21 pm - 6:30 amONT-MIA

10h 09m1 stop

$239Frontier

Find Deal

Mon, Aug 11 - Wed, Aug 13

7:15 am - 4:19 pmMIA-ONT

12h 04m1 stop

5:14 pm - 5:45 amONT-MIA

9h 31m1 stop

$240Frontier

Find Deal

Thu, Aug 14 - Sun, Aug 17

6:00 am - 11:50 pmMIA-ONT

20h 50m1 stop

5:21 pm - 6:30 amONT-MIA

10h 09m1 stop

$244Frontier

Find Deal

Tue, Aug 5 - Wed, Aug 6

7:15 am - 4:19 pmMIA-ONT

12h 04m1 stop

12:59 am - 6:30 amONT-MIA

26h 31m1 stop

$245Frontier

Find Deal

Thu, Aug 14 - Tue, Aug 19

6:00 am - 10:35 amMIA-ONT

7h 35m1 stop

11:45 am - 12:24 amONT-MIA

9h 39m1 stop

$288Delta

Find Deal

Sat, Aug 23 - Sun, Aug 31

6:20 pm - 11:05 amMIA-ONT

19h 45m1 stop

6:58 pm - 5:20 pmONT-MIA

19h 22m1 stop

$298Alaska Airlines

Find Deal

Thu, Aug 14 - Mon, Aug 18

6:00 am - 10:35 amMIA-ONT

7h 35m1 stop

7:05 am - 6:25 pmONT-MIA

8h 20m1 stop

$299Delta

Find Deal

Thu, Aug 14 - Wed, Aug 20

7:15 am - 4:19 pmMIA-ONT

12h 04m1 stop

5:14 pm - 5:38 amONT-MIA

9h 24m1 stop

$300

Find Deal

Thu, Jul 31 - Thu, Aug 7

Delta flights from Miami to Ontario

Our best Delta deals on Miami to Ontario flight tickets

Delta

Aug 23

MIA6:00 amMiami

7h 35m

1 stop

ONT10:35 amOntario

Aug 31

ONT11:45 amOntario

9h 39m

1 stop

MIA12:24 amMiami

$288

Find similar

Delta

Aug 14

MIA6:00 amMiami

7h 35m

1 stop

ONT10:35 amOntario

Aug 20

ONT7:05 amOntario

8h 20m

1 stop

MIA6:25 pmMiami

$299

Find similar

Delta

Aug 22

MIA4:25 pmMiami

8h 55m

1 stop

ONT10:20 pmOntario

Aug 30

ONT11:45 amOntario

9h 39m

1 stop

MIA12:24 amMiami

$302

Find similar

Frontier flights from Miami to Ontario

Our best Frontier deals on Miami to Ontario flight tickets

Frontier

Aug 15

MIA7:15 amMiami

7h 38m

1 stop

ONT11:53 amOntario

Aug 17

ONT5:14 pmOntario

9h 31m

1 stop

MIA5:45 amMiami

$219

Find similar

Frontier

Jul 24

MIA7:15 amMiami

12h 04m

1 stop

ONT4:19 pmOntario

Aug 2

ONT5:21 pmOntario

10h 09m

1 stop

MIA6:30 amMiami

$223

Find similar

Frontier

Aug 11

MIA7:15 amMiami

7h 38m

1 stop

ONT11:53 amOntario

Aug 13

ONT5:21 pmOntario

10h 09m

1 stop

MIA6:30 amMiami

$239

Find similar

How to get the cheapest flight ticket from Miami to Ontario

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

Prices

Airlines

What is the cheapest month to fly to Ontario?

In general, August is the cheapest month to fly from Miami to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $266. If you aren’t able to travel during the month of August, then book flights to Ontario from Miami during September instead. Flights to Ontario in September, while not as cheap as those in August, still average around $286.

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

The cheapest day to depart on your flight to Ontario is on a Thursday when prices can be found for as low as $286. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Miami to Ontario for around $499.

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

In the afternoon is the cheapest time of day to fly from Miami to Ontario when you can find flight prices for as low as $294. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $437 on average. Flights to Ontario from Miami at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How have Miami to Ontario flight prices changed over time?

As of July 2025, prices for Miami to Ontario flights are approximately 0% more expensive when compared to flights at the same time last year.

When to book flights from Miami to Ontario

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

Estimated round-trip price

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

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

Best Price Found	$110
Fastest flight time	7h 29m
Direct flights	None
Airports in Ontario	1 airport

The best one-way flight to Ontario from Miami in the past 72 hours is $110. The best round-trip flight deal from Miami to Ontario found on momondo in the last 72 hours is $219.

The fastest flight from Miami to Ontario takes 7h 29m

There are no direct flights from Miami to Ontario. Popular non-direct route for this connection is Miami Airport - Ontario Airport.

There is 1 airport near Ontario: Ontario (ONT)

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How far is Miami to Ontario by plane?
A flight from Miami to Ontario will travel around 2299.8 mi. 7h 35m is a normal flight duration for this route.
When did momondo last update prices for flights from Miami Airport to Ontario Airport?
Prices for flights from Miami Airport to Ontario Airport refresh daily.
How many operators does momondo search for flights from Miami Airport to Ontario Airport?
The number of operators available for flights from Miami Airport to Ontario Airport is 4 as of July 2025.
How old do you have to be to fly from Miami Airport to Ontario Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Miami Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents required for your trip to Ontario 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 Ontario 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 Miami to Ontario?
momondo data reveals that the most frequently booked airline on the route from Miami to Ontario is American Airlines, representing 67% of all bookings. The subsequent popular airlines are Frontier at 14%, United Airlines at 10%, and Delta at 8%.

Best airlines flying from Miami to Ontario

Compare and see reviews for airlines that fly from Miami to Ontario with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $170	Free Cancellation	Rating 5.9 3,261 reviews	Search Frontier flights
American Airlines	PriceFrom $236	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Delta	PriceFrom $253	Free Cancellation	Rating 8.0 7,956 reviews	Search Delta flights
United Airlines	PriceFrom $256	Free Cancellation	Rating 7.4 8,858 reviews	Search United Airlines flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from Miami.

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

Flights from Miami to Ontario with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential Miami to Ontario 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 Miami to Ontario right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Ontario from Miami. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.